drivers/pinctrl/intel/pinctrl-cherryview.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Cherryview/Braswell pinctrl driver
   4  *
   5  * Copyright (C) 2014, Intel Corporation
   6  * Author: Mika Westerberg <mika.westerberg@linux.intel.com>
   7  *
   8  * This driver is based on the original Cherryview GPIO driver by
   9  *   Ning Li <ning.li@intel.com>
  10  *   Alan Cox <alan@linux.intel.com>
  11  */
  12
  13 #include <linux/dmi.h>
  14 #include <linux/kernel.h>
  15 #include <linux/module.h>
  16 #include <linux/init.h>
  17 #include <linux/types.h>
  18 #include <linux/gpio.h>
  19 #include <linux/gpio/driver.h>
  20 #include <linux/acpi.h>
  21 #include <linux/pinctrl/pinctrl.h>
  22 #include <linux/pinctrl/pinmux.h>
  23 #include <linux/pinctrl/pinconf.h>
  24 #include <linux/pinctrl/pinconf-generic.h>
  25 #include <linux/platform_device.h>
  26
  27 #define CHV_INTSTAT                     0x300
  28 #define CHV_INTMASK                     0x380
  29
  30 #define FAMILY_PAD_REGS_OFF             0x4400
  31 #define FAMILY_PAD_REGS_SIZE            0x400
  32 #define MAX_FAMILY_PAD_GPIO_NO          15
  33 #define GPIO_REGS_SIZE                  8
  34
  35 #define CHV_PADCTRL0                    0x000
  36 #define CHV_PADCTRL0_INTSEL_SHIFT       28
  37 #define CHV_PADCTRL0_INTSEL_MASK        (0xf << CHV_PADCTRL0_INTSEL_SHIFT)
  38 #define CHV_PADCTRL0_TERM_UP            BIT(23)
  39 #define CHV_PADCTRL0_TERM_SHIFT         20
  40 #define CHV_PADCTRL0_TERM_MASK          (7 << CHV_PADCTRL0_TERM_SHIFT)
  41 #define CHV_PADCTRL0_TERM_20K           1
  42 #define CHV_PADCTRL0_TERM_5K            2
  43 #define CHV_PADCTRL0_TERM_1K            4
  44 #define CHV_PADCTRL0_PMODE_SHIFT        16
  45 #define CHV_PADCTRL0_PMODE_MASK         (0xf << CHV_PADCTRL0_PMODE_SHIFT)
  46 #define CHV_PADCTRL0_GPIOEN             BIT(15)
  47 #define CHV_PADCTRL0_GPIOCFG_SHIFT      8
  48 #define CHV_PADCTRL0_GPIOCFG_MASK       (7 << CHV_PADCTRL0_GPIOCFG_SHIFT)
  49 #define CHV_PADCTRL0_GPIOCFG_GPIO       0
  50 #define CHV_PADCTRL0_GPIOCFG_GPO        1
  51 #define CHV_PADCTRL0_GPIOCFG_GPI        2
  52 #define CHV_PADCTRL0_GPIOCFG_HIZ        3
  53 #define CHV_PADCTRL0_GPIOTXSTATE        BIT(1)
  54 #define CHV_PADCTRL0_GPIORXSTATE        BIT(0)
  55
  56 #define CHV_PADCTRL1                    0x004
  57 #define CHV_PADCTRL1_CFGLOCK            BIT(31)
  58 #define CHV_PADCTRL1_INVRXTX_SHIFT      4
  59 #define CHV_PADCTRL1_INVRXTX_MASK       (0xf << CHV_PADCTRL1_INVRXTX_SHIFT)
  60 #define CHV_PADCTRL1_INVRXTX_TXENABLE   (2 << CHV_PADCTRL1_INVRXTX_SHIFT)
  61 #define CHV_PADCTRL1_ODEN               BIT(3)
  62 #define CHV_PADCTRL1_INVRXTX_RXDATA     (4 << CHV_PADCTRL1_INVRXTX_SHIFT)
  63 #define CHV_PADCTRL1_INTWAKECFG_MASK    7
  64 #define CHV_PADCTRL1_INTWAKECFG_FALLING 1
  65 #define CHV_PADCTRL1_INTWAKECFG_RISING  2
  66 #define CHV_PADCTRL1_INTWAKECFG_BOTH    3
  67 #define CHV_PADCTRL1_INTWAKECFG_LEVEL   4
  68
  69 /**
  70  * struct chv_alternate_function - A per group or per pin alternate function
  71  * @pin: Pin number (only used in per pin configs)
  72  * @mode: Mode the pin should be set in
  73  * @invert_oe: Invert OE for this pin
  74  */
  75 struct chv_alternate_function {
  76         unsigned pin;
  77         u8 mode;
  78         bool invert_oe;
  79 };
  80
  81 /**
  82  * struct chv_pincgroup - describes a CHV pin group
  83  * @name: Name of the group
  84  * @pins: An array of pins in this group
  85  * @npins: Number of pins in this group
  86  * @altfunc: Alternate function applied to all pins in this group
  87  * @overrides: Alternate function override per pin or %NULL if not used
  88  * @noverrides: Number of per pin alternate function overrides if
  89  *              @overrides != NULL.
  90  */
  91 struct chv_pingroup {
  92         const char *name;
  93         const unsigned *pins;
  94         size_t npins;
  95         struct chv_alternate_function altfunc;
  96         const struct chv_alternate_function *overrides;
  97         size_t noverrides;
  98 };
  99
 100 /**
 101  * struct chv_function - A CHV pinmux function
 102  * @name: Name of the function
 103  * @groups: An array of groups for this function
 104  * @ngroups: Number of groups in @groups
 105  */
 106 struct chv_function {
 107         const char *name;
 108         const char * const *groups;
 109         size_t ngroups;
 110 };
 111
 112 /**
 113  * struct chv_gpio_pinrange - A range of pins that can be used as GPIOs
 114  * @base: Start pin number
 115  * @npins: Number of pins in this range
 116  */
 117 struct chv_gpio_pinrange {
 118         unsigned base;
 119         unsigned npins;
 120 };
 121
 122 /**
 123  * struct chv_community - A community specific configuration
 124  * @uid: ACPI _UID used to match the community
 125  * @pins: All pins in this community
 126  * @npins: Number of pins
 127  * @groups: All groups in this community
 128  * @ngroups: Number of groups
 129  * @functions: All functions in this community
 130  * @nfunctions: Number of functions
 131  * @gpio_ranges: An array of GPIO ranges in this community
 132  * @ngpio_ranges: Number of GPIO ranges
 133  * @nirqs: Total number of IRQs this community can generate
 134  */
 135 struct chv_community {
 136         const char *uid;
 137         const struct pinctrl_pin_desc *pins;
 138         size_t npins;
 139         const struct chv_pingroup *groups;
 140         size_t ngroups;
 141         const struct chv_function *functions;
 142         size_t nfunctions;
 143         const struct chv_gpio_pinrange *gpio_ranges;
 144         size_t ngpio_ranges;
 145         size_t nirqs;
 146         acpi_adr_space_type acpi_space_id;
 147 };
 148
 149 struct chv_pin_context {
 150         u32 padctrl0;
 151         u32 padctrl1;
 152 };
 153
 154 /**
 155  * struct chv_pinctrl - CHV pinctrl private structure
 156  * @dev: Pointer to the parent device
 157  * @pctldesc: Pin controller description
 158  * @pctldev: Pointer to the pin controller device
 159  * @chip: GPIO chip in this pin controller
 160  * @regs: MMIO registers
 161  * @intr_lines: Stores mapping between 16 HW interrupt wires and GPIO
 162  *              offset (in GPIO number space)
 163  * @community: Community this pinctrl instance represents
 164  *
 165  * The first group in @groups is expected to contain all pins that can be
 166  * used as GPIOs.
 167  */
 168 struct chv_pinctrl {
 169         struct device *dev;
 170         struct pinctrl_desc pctldesc;
 171         struct pinctrl_dev *pctldev;
 172         struct gpio_chip chip;
 173         void __iomem *regs;
 174         unsigned intr_lines[16];
 175         const struct chv_community *community;
 176         u32 saved_intmask;
 177         struct chv_pin_context *saved_pin_context;
 178 };
 179
 180 #define ALTERNATE_FUNCTION(p, m, i)             \
 181         {                                       \
 182                 .pin = (p),                     \
 183                 .mode = (m),                    \
 184                 .invert_oe = (i),               \
 185         }
 186
 187 #define PIN_GROUP(n, p, m, i)                   \
 188         {                                       \
 189                 .name = (n),                    \
 190                 .pins = (p),                    \
 191                 .npins = ARRAY_SIZE((p)),       \
 192                 .altfunc.mode = (m),            \
 193                 .altfunc.invert_oe = (i),       \
 194         }
 195
 196 #define PIN_GROUP_WITH_OVERRIDE(n, p, m, i, o)  \
 197         {                                       \
 198                 .name = (n),                    \
 199                 .pins = (p),                    \
 200                 .npins = ARRAY_SIZE((p)),       \
 201                 .altfunc.mode = (m),            \
 202                 .altfunc.invert_oe = (i),       \
 203                 .overrides = (o),               \
 204                 .noverrides = ARRAY_SIZE((o)),  \
 205         }
 206
 207 #define FUNCTION(n, g)                          \
 208         {                                       \
 209                 .name = (n),                    \
 210                 .groups = (g),                  \
 211                 .ngroups = ARRAY_SIZE((g)),     \
 212         }
 213
 214 #define GPIO_PINRANGE(start, end)               \
 215         {                                       \
 216                 .base = (start),                \
 217                 .npins = (end) - (start) + 1,   \
 218         }
 219
 220 static const struct pinctrl_pin_desc southwest_pins[] = {
 221         PINCTRL_PIN(0, "FST_SPI_D2"),
 222         PINCTRL_PIN(1, "FST_SPI_D0"),
 223         PINCTRL_PIN(2, "FST_SPI_CLK"),
 224         PINCTRL_PIN(3, "FST_SPI_D3"),
 225         PINCTRL_PIN(4, "FST_SPI_CS1_B"),
 226         PINCTRL_PIN(5, "FST_SPI_D1"),
 227         PINCTRL_PIN(6, "FST_SPI_CS0_B"),
 228         PINCTRL_PIN(7, "FST_SPI_CS2_B"),
 229
 230         PINCTRL_PIN(15, "UART1_RTS_B"),
 231         PINCTRL_PIN(16, "UART1_RXD"),
 232         PINCTRL_PIN(17, "UART2_RXD"),
 233         PINCTRL_PIN(18, "UART1_CTS_B"),
 234         PINCTRL_PIN(19, "UART2_RTS_B"),
 235         PINCTRL_PIN(20, "UART1_TXD"),
 236         PINCTRL_PIN(21, "UART2_TXD"),
 237         PINCTRL_PIN(22, "UART2_CTS_B"),
 238
 239         PINCTRL_PIN(30, "MF_HDA_CLK"),
 240         PINCTRL_PIN(31, "MF_HDA_RSTB"),
 241         PINCTRL_PIN(32, "MF_HDA_SDIO"),
 242         PINCTRL_PIN(33, "MF_HDA_SDO"),
 243         PINCTRL_PIN(34, "MF_HDA_DOCKRSTB"),
 244         PINCTRL_PIN(35, "MF_HDA_SYNC"),
 245         PINCTRL_PIN(36, "MF_HDA_SDI1"),
 246         PINCTRL_PIN(37, "MF_HDA_DOCKENB"),
 247
 248         PINCTRL_PIN(45, "I2C5_SDA"),
 249         PINCTRL_PIN(46, "I2C4_SDA"),
 250         PINCTRL_PIN(47, "I2C6_SDA"),
 251         PINCTRL_PIN(48, "I2C5_SCL"),
 252         PINCTRL_PIN(49, "I2C_NFC_SDA"),
 253         PINCTRL_PIN(50, "I2C4_SCL"),
 254         PINCTRL_PIN(51, "I2C6_SCL"),
 255         PINCTRL_PIN(52, "I2C_NFC_SCL"),
 256
 257         PINCTRL_PIN(60, "I2C1_SDA"),
 258         PINCTRL_PIN(61, "I2C0_SDA"),
 259         PINCTRL_PIN(62, "I2C2_SDA"),
 260         PINCTRL_PIN(63, "I2C1_SCL"),
 261         PINCTRL_PIN(64, "I2C3_SDA"),
 262         PINCTRL_PIN(65, "I2C0_SCL"),
 263         PINCTRL_PIN(66, "I2C2_SCL"),
 264         PINCTRL_PIN(67, "I2C3_SCL"),
 265
 266         PINCTRL_PIN(75, "SATA_GP0"),
 267         PINCTRL_PIN(76, "SATA_GP1"),
 268         PINCTRL_PIN(77, "SATA_LEDN"),
 269         PINCTRL_PIN(78, "SATA_GP2"),
 270         PINCTRL_PIN(79, "MF_SMB_ALERTB"),
 271         PINCTRL_PIN(80, "SATA_GP3"),
 272         PINCTRL_PIN(81, "MF_SMB_CLK"),
 273         PINCTRL_PIN(82, "MF_SMB_DATA"),
 274
 275         PINCTRL_PIN(90, "PCIE_CLKREQ0B"),
 276         PINCTRL_PIN(91, "PCIE_CLKREQ1B"),
 277         PINCTRL_PIN(92, "GP_SSP_2_CLK"),
 278         PINCTRL_PIN(93, "PCIE_CLKREQ2B"),
 279         PINCTRL_PIN(94, "GP_SSP_2_RXD"),
 280         PINCTRL_PIN(95, "PCIE_CLKREQ3B"),
 281         PINCTRL_PIN(96, "GP_SSP_2_FS"),
 282         PINCTRL_PIN(97, "GP_SSP_2_TXD"),
 283 };
 284
 285 static const unsigned southwest_fspi_pins[] = { 0, 1, 2, 3, 4, 5, 6, 7 };
 286 static const unsigned southwest_uart0_pins[] = { 16, 20 };
 287 static const unsigned southwest_uart1_pins[] = { 15, 16, 18, 20 };
 288 static const unsigned southwest_uart2_pins[] = { 17, 19, 21, 22 };
 289 static const unsigned southwest_i2c0_pins[] = { 61, 65 };
 290 static const unsigned southwest_hda_pins[] = { 30, 31, 32, 33, 34, 35, 36, 37 };
 291 static const unsigned southwest_lpe_pins[] = {
 292         30, 31, 32, 33, 34, 35, 36, 37, 92, 94, 96, 97,
 293 };
 294 static const unsigned southwest_i2c1_pins[] = { 60, 63 };
 295 static const unsigned southwest_i2c2_pins[] = { 62, 66 };
 296 static const unsigned southwest_i2c3_pins[] = { 64, 67 };
 297 static const unsigned southwest_i2c4_pins[] = { 46, 50 };
 298 static const unsigned southwest_i2c5_pins[] = { 45, 48 };
 299 static const unsigned southwest_i2c6_pins[] = { 47, 51 };
 300 static const unsigned southwest_i2c_nfc_pins[] = { 49, 52 };
 301 static const unsigned southwest_smbus_pins[] = { 79, 81, 82 };
 302 static const unsigned southwest_spi3_pins[] = { 76, 79, 80, 81, 82 };
 303
 304 /* LPE I2S TXD pins need to have invert_oe set */
 305 static const struct chv_alternate_function southwest_lpe_altfuncs[] = {
 306         ALTERNATE_FUNCTION(30, 1, true),
 307         ALTERNATE_FUNCTION(34, 1, true),
 308         ALTERNATE_FUNCTION(97, 1, true),
 309 };
 310
 311 /*
 312  * Two spi3 chipselects are available in different mode than the main spi3
 313  * functionality, which is using mode 1.
 314  */
 315 static const struct chv_alternate_function southwest_spi3_altfuncs[] = {
 316         ALTERNATE_FUNCTION(76, 3, false),
 317         ALTERNATE_FUNCTION(80, 3, false),
 318 };
 319
 320 static const struct chv_pingroup southwest_groups[] = {
 321         PIN_GROUP("uart0_grp", southwest_uart0_pins, 2, false),
 322         PIN_GROUP("uart1_grp", southwest_uart1_pins, 1, false),
 323         PIN_GROUP("uart2_grp", southwest_uart2_pins, 1, false),
 324         PIN_GROUP("hda_grp", southwest_hda_pins, 2, false),
 325         PIN_GROUP("i2c0_grp", southwest_i2c0_pins, 1, true),
 326         PIN_GROUP("i2c1_grp", southwest_i2c1_pins, 1, true),
 327         PIN_GROUP("i2c2_grp", southwest_i2c2_pins, 1, true),
 328         PIN_GROUP("i2c3_grp", southwest_i2c3_pins, 1, true),
 329         PIN_GROUP("i2c4_grp", southwest_i2c4_pins, 1, true),
 330         PIN_GROUP("i2c5_grp", southwest_i2c5_pins, 1, true),
 331         PIN_GROUP("i2c6_grp", southwest_i2c6_pins, 1, true),
 332         PIN_GROUP("i2c_nfc_grp", southwest_i2c_nfc_pins, 2, true),
 333
 334         PIN_GROUP_WITH_OVERRIDE("lpe_grp", southwest_lpe_pins, 1, false,
 335                                 southwest_lpe_altfuncs),
 336         PIN_GROUP_WITH_OVERRIDE("spi3_grp", southwest_spi3_pins, 2, false,
 337                                 southwest_spi3_altfuncs),
 338 };
 339
 340 static const char * const southwest_uart0_groups[] = { "uart0_grp" };
 341 static const char * const southwest_uart1_groups[] = { "uart1_grp" };
 342 static const char * const southwest_uart2_groups[] = { "uart2_grp" };
 343 static const char * const southwest_hda_groups[] = { "hda_grp" };
 344 static const char * const southwest_lpe_groups[] = { "lpe_grp" };
 345 static const char * const southwest_i2c0_groups[] = { "i2c0_grp" };
 346 static const char * const southwest_i2c1_groups[] = { "i2c1_grp" };
 347 static const char * const southwest_i2c2_groups[] = { "i2c2_grp" };
 348 static const char * const southwest_i2c3_groups[] = { "i2c3_grp" };
 349 static const char * const southwest_i2c4_groups[] = { "i2c4_grp" };
 350 static const char * const southwest_i2c5_groups[] = { "i2c5_grp" };
 351 static const char * const southwest_i2c6_groups[] = { "i2c6_grp" };
 352 static const char * const southwest_i2c_nfc_groups[] = { "i2c_nfc_grp" };
 353 static const char * const southwest_spi3_groups[] = { "spi3_grp" };
 354
 355 /*
 356  * Only do pinmuxing for certain LPSS devices for now. Rest of the pins are
 357  * enabled only as GPIOs.
 358  */
 359 static const struct chv_function southwest_functions[] = {
 360         FUNCTION("uart0", southwest_uart0_groups),
 361         FUNCTION("uart1", southwest_uart1_groups),
 362         FUNCTION("uart2", southwest_uart2_groups),
 363         FUNCTION("hda", southwest_hda_groups),
 364         FUNCTION("lpe", southwest_lpe_groups),
 365         FUNCTION("i2c0", southwest_i2c0_groups),
 366         FUNCTION("i2c1", southwest_i2c1_groups),
 367         FUNCTION("i2c2", southwest_i2c2_groups),
 368         FUNCTION("i2c3", southwest_i2c3_groups),
 369         FUNCTION("i2c4", southwest_i2c4_groups),
 370         FUNCTION("i2c5", southwest_i2c5_groups),
 371         FUNCTION("i2c6", southwest_i2c6_groups),
 372         FUNCTION("i2c_nfc", southwest_i2c_nfc_groups),
 373         FUNCTION("spi3", southwest_spi3_groups),
 374 };
 375
 376 static const struct chv_gpio_pinrange southwest_gpio_ranges[] = {
 377         GPIO_PINRANGE(0, 7),
 378         GPIO_PINRANGE(15, 22),
 379         GPIO_PINRANGE(30, 37),
 380         GPIO_PINRANGE(45, 52),
 381         GPIO_PINRANGE(60, 67),
 382         GPIO_PINRANGE(75, 82),
 383         GPIO_PINRANGE(90, 97),
 384 };
 385
 386 static const struct chv_community southwest_community = {
 387         .uid = "1",
 388         .pins = southwest_pins,
 389         .npins = ARRAY_SIZE(southwest_pins),
 390         .groups = southwest_groups,
 391         .ngroups = ARRAY_SIZE(southwest_groups),
 392         .functions = southwest_functions,
 393         .nfunctions = ARRAY_SIZE(southwest_functions),
 394         .gpio_ranges = southwest_gpio_ranges,
 395         .ngpio_ranges = ARRAY_SIZE(southwest_gpio_ranges),
 396         /*
 397          * Southwest community can benerate GPIO interrupts only for the
 398          * first 8 interrupts. The upper half (8-15) can only be used to
 399          * trigger GPEs.
 400          */
 401         .nirqs = 8,
 402         .acpi_space_id = 0x91,
 403 };
 404
 405 static const struct pinctrl_pin_desc north_pins[] = {
 406         PINCTRL_PIN(0, "GPIO_DFX_0"),
 407         PINCTRL_PIN(1, "GPIO_DFX_3"),
 408         PINCTRL_PIN(2, "GPIO_DFX_7"),
 409         PINCTRL_PIN(3, "GPIO_DFX_1"),
 410         PINCTRL_PIN(4, "GPIO_DFX_5"),
 411         PINCTRL_PIN(5, "GPIO_DFX_4"),
 412         PINCTRL_PIN(6, "GPIO_DFX_8"),
 413         PINCTRL_PIN(7, "GPIO_DFX_2"),
 414         PINCTRL_PIN(8, "GPIO_DFX_6"),
 415
 416         PINCTRL_PIN(15, "GPIO_SUS0"),
 417         PINCTRL_PIN(16, "SEC_GPIO_SUS10"),
 418         PINCTRL_PIN(17, "GPIO_SUS3"),
 419         PINCTRL_PIN(18, "GPIO_SUS7"),
 420         PINCTRL_PIN(19, "GPIO_SUS1"),
 421         PINCTRL_PIN(20, "GPIO_SUS5"),
 422         PINCTRL_PIN(21, "SEC_GPIO_SUS11"),
 423         PINCTRL_PIN(22, "GPIO_SUS4"),
 424         PINCTRL_PIN(23, "SEC_GPIO_SUS8"),
 425         PINCTRL_PIN(24, "GPIO_SUS2"),
 426         PINCTRL_PIN(25, "GPIO_SUS6"),
 427         PINCTRL_PIN(26, "CX_PREQ_B"),
 428         PINCTRL_PIN(27, "SEC_GPIO_SUS9"),
 429
 430         PINCTRL_PIN(30, "TRST_B"),
 431         PINCTRL_PIN(31, "TCK"),
 432         PINCTRL_PIN(32, "PROCHOT_B"),
 433         PINCTRL_PIN(33, "SVIDO_DATA"),
 434         PINCTRL_PIN(34, "TMS"),
 435         PINCTRL_PIN(35, "CX_PRDY_B_2"),
 436         PINCTRL_PIN(36, "TDO_2"),
 437         PINCTRL_PIN(37, "CX_PRDY_B"),
 438         PINCTRL_PIN(38, "SVIDO_ALERT_B"),
 439         PINCTRL_PIN(39, "TDO"),
 440         PINCTRL_PIN(40, "SVIDO_CLK"),
 441         PINCTRL_PIN(41, "TDI"),
 442
 443         PINCTRL_PIN(45, "GP_CAMERASB_05"),
 444         PINCTRL_PIN(46, "GP_CAMERASB_02"),
 445         PINCTRL_PIN(47, "GP_CAMERASB_08"),
 446         PINCTRL_PIN(48, "GP_CAMERASB_00"),
 447         PINCTRL_PIN(49, "GP_CAMERASB_06"),
 448         PINCTRL_PIN(50, "GP_CAMERASB_10"),
 449         PINCTRL_PIN(51, "GP_CAMERASB_03"),
 450         PINCTRL_PIN(52, "GP_CAMERASB_09"),
 451         PINCTRL_PIN(53, "GP_CAMERASB_01"),
 452         PINCTRL_PIN(54, "GP_CAMERASB_07"),
 453         PINCTRL_PIN(55, "GP_CAMERASB_11"),
 454         PINCTRL_PIN(56, "GP_CAMERASB_04"),
 455
 456         PINCTRL_PIN(60, "PANEL0_BKLTEN"),
 457         PINCTRL_PIN(61, "HV_DDI0_HPD"),
 458         PINCTRL_PIN(62, "HV_DDI2_DDC_SDA"),
 459         PINCTRL_PIN(63, "PANEL1_BKLTCTL"),
 460         PINCTRL_PIN(64, "HV_DDI1_HPD"),
 461         PINCTRL_PIN(65, "PANEL0_BKLTCTL"),
 462         PINCTRL_PIN(66, "HV_DDI0_DDC_SDA"),
 463         PINCTRL_PIN(67, "HV_DDI2_DDC_SCL"),
 464         PINCTRL_PIN(68, "HV_DDI2_HPD"),
 465         PINCTRL_PIN(69, "PANEL1_VDDEN"),
 466         PINCTRL_PIN(70, "PANEL1_BKLTEN"),
 467         PINCTRL_PIN(71, "HV_DDI0_DDC_SCL"),
 468         PINCTRL_PIN(72, "PANEL0_VDDEN"),
 469 };
 470
 471 static const struct chv_gpio_pinrange north_gpio_ranges[] = {
 472         GPIO_PINRANGE(0, 8),
 473         GPIO_PINRANGE(15, 27),
 474         GPIO_PINRANGE(30, 41),
 475         GPIO_PINRANGE(45, 56),
 476         GPIO_PINRANGE(60, 72),
 477 };
 478
 479 static const struct chv_community north_community = {
 480         .uid = "2",
 481         .pins = north_pins,
 482         .npins = ARRAY_SIZE(north_pins),
 483         .gpio_ranges = north_gpio_ranges,
 484         .ngpio_ranges = ARRAY_SIZE(north_gpio_ranges),
 485         /*
 486          * North community can generate GPIO interrupts only for the first
 487          * 8 interrupts. The upper half (8-15) can only be used to trigger
 488          * GPEs.
 489          */
 490         .nirqs = 8,
 491         .acpi_space_id = 0x92,
 492 };
 493
 494 static const struct pinctrl_pin_desc east_pins[] = {
 495         PINCTRL_PIN(0, "PMU_SLP_S3_B"),
 496         PINCTRL_PIN(1, "PMU_BATLOW_B"),
 497         PINCTRL_PIN(2, "SUS_STAT_B"),
 498         PINCTRL_PIN(3, "PMU_SLP_S0IX_B"),
 499         PINCTRL_PIN(4, "PMU_AC_PRESENT"),
 500         PINCTRL_PIN(5, "PMU_PLTRST_B"),
 501         PINCTRL_PIN(6, "PMU_SUSCLK"),
 502         PINCTRL_PIN(7, "PMU_SLP_LAN_B"),
 503         PINCTRL_PIN(8, "PMU_PWRBTN_B"),
 504         PINCTRL_PIN(9, "PMU_SLP_S4_B"),
 505         PINCTRL_PIN(10, "PMU_WAKE_B"),
 506         PINCTRL_PIN(11, "PMU_WAKE_LAN_B"),
 507
 508         PINCTRL_PIN(15, "MF_ISH_GPIO_3"),
 509         PINCTRL_PIN(16, "MF_ISH_GPIO_7"),
 510         PINCTRL_PIN(17, "MF_ISH_I2C1_SCL"),
 511         PINCTRL_PIN(18, "MF_ISH_GPIO_1"),
 512         PINCTRL_PIN(19, "MF_ISH_GPIO_5"),
 513         PINCTRL_PIN(20, "MF_ISH_GPIO_9"),
 514         PINCTRL_PIN(21, "MF_ISH_GPIO_0"),
 515         PINCTRL_PIN(22, "MF_ISH_GPIO_4"),
 516         PINCTRL_PIN(23, "MF_ISH_GPIO_8"),
 517         PINCTRL_PIN(24, "MF_ISH_GPIO_2"),
 518         PINCTRL_PIN(25, "MF_ISH_GPIO_6"),
 519         PINCTRL_PIN(26, "MF_ISH_I2C1_SDA"),
 520 };
 521
 522 static const struct chv_gpio_pinrange east_gpio_ranges[] = {
 523         GPIO_PINRANGE(0, 11),
 524         GPIO_PINRANGE(15, 26),
 525 };
 526
 527 static const struct chv_community east_community = {
 528         .uid = "3",
 529         .pins = east_pins,
 530         .npins = ARRAY_SIZE(east_pins),
 531         .gpio_ranges = east_gpio_ranges,
 532         .ngpio_ranges = ARRAY_SIZE(east_gpio_ranges),
 533         .nirqs = 16,
 534         .acpi_space_id = 0x93,
 535 };
 536
 537 static const struct pinctrl_pin_desc southeast_pins[] = {
 538         PINCTRL_PIN(0, "MF_PLT_CLK0"),
 539         PINCTRL_PIN(1, "PWM1"),
 540         PINCTRL_PIN(2, "MF_PLT_CLK1"),
 541         PINCTRL_PIN(3, "MF_PLT_CLK4"),
 542         PINCTRL_PIN(4, "MF_PLT_CLK3"),
 543         PINCTRL_PIN(5, "PWM0"),
 544         PINCTRL_PIN(6, "MF_PLT_CLK5"),
 545         PINCTRL_PIN(7, "MF_PLT_CLK2"),
 546
 547         PINCTRL_PIN(15, "SDMMC2_D3_CD_B"),
 548         PINCTRL_PIN(16, "SDMMC1_CLK"),
 549         PINCTRL_PIN(17, "SDMMC1_D0"),
 550         PINCTRL_PIN(18, "SDMMC2_D1"),
 551         PINCTRL_PIN(19, "SDMMC2_CLK"),
 552         PINCTRL_PIN(20, "SDMMC1_D2"),
 553         PINCTRL_PIN(21, "SDMMC2_D2"),
 554         PINCTRL_PIN(22, "SDMMC2_CMD"),
 555         PINCTRL_PIN(23, "SDMMC1_CMD"),
 556         PINCTRL_PIN(24, "SDMMC1_D1"),
 557         PINCTRL_PIN(25, "SDMMC2_D0"),
 558         PINCTRL_PIN(26, "SDMMC1_D3_CD_B"),
 559
 560         PINCTRL_PIN(30, "SDMMC3_D1"),
 561         PINCTRL_PIN(31, "SDMMC3_CLK"),
 562         PINCTRL_PIN(32, "SDMMC3_D3"),
 563         PINCTRL_PIN(33, "SDMMC3_D2"),
 564         PINCTRL_PIN(34, "SDMMC3_CMD"),
 565         PINCTRL_PIN(35, "SDMMC3_D0"),
 566
 567         PINCTRL_PIN(45, "MF_LPC_AD2"),
 568         PINCTRL_PIN(46, "LPC_CLKRUNB"),
 569         PINCTRL_PIN(47, "MF_LPC_AD0"),
 570         PINCTRL_PIN(48, "LPC_FRAMEB"),
 571         PINCTRL_PIN(49, "MF_LPC_CLKOUT1"),
 572         PINCTRL_PIN(50, "MF_LPC_AD3"),
 573         PINCTRL_PIN(51, "MF_LPC_CLKOUT0"),
 574         PINCTRL_PIN(52, "MF_LPC_AD1"),
 575
 576         PINCTRL_PIN(60, "SPI1_MISO"),
 577         PINCTRL_PIN(61, "SPI1_CSO_B"),
 578         PINCTRL_PIN(62, "SPI1_CLK"),
 579         PINCTRL_PIN(63, "MMC1_D6"),
 580         PINCTRL_PIN(64, "SPI1_MOSI"),
 581         PINCTRL_PIN(65, "MMC1_D5"),
 582         PINCTRL_PIN(66, "SPI1_CS1_B"),
 583         PINCTRL_PIN(67, "MMC1_D4_SD_WE"),
 584         PINCTRL_PIN(68, "MMC1_D7"),
 585         PINCTRL_PIN(69, "MMC1_RCLK"),
 586
 587         PINCTRL_PIN(75, "USB_OC1_B"),
 588         PINCTRL_PIN(76, "PMU_RESETBUTTON_B"),
 589         PINCTRL_PIN(77, "GPIO_ALERT"),
 590         PINCTRL_PIN(78, "SDMMC3_PWR_EN_B"),
 591         PINCTRL_PIN(79, "ILB_SERIRQ"),
 592         PINCTRL_PIN(80, "USB_OC0_B"),
 593         PINCTRL_PIN(81, "SDMMC3_CD_B"),
 594         PINCTRL_PIN(82, "SPKR"),
 595         PINCTRL_PIN(83, "SUSPWRDNACK"),
 596         PINCTRL_PIN(84, "SPARE_PIN"),
 597         PINCTRL_PIN(85, "SDMMC3_1P8_EN"),
 598 };
 599
 600 static const unsigned southeast_pwm0_pins[] = { 5 };
 601 static const unsigned southeast_pwm1_pins[] = { 1 };
 602 static const unsigned southeast_sdmmc1_pins[] = {
 603         16, 17, 20, 23, 24, 26, 63, 65, 67, 68, 69,
 604 };
 605 static const unsigned southeast_sdmmc2_pins[] = { 15, 18, 19, 21, 22, 25 };
 606 static const unsigned southeast_sdmmc3_pins[] = {
 607         30, 31, 32, 33, 34, 35, 78, 81, 85,
 608 };
 609 static const unsigned southeast_spi1_pins[] = { 60, 61, 62, 64, 66 };
 610 static const unsigned southeast_spi2_pins[] = { 2, 3, 4, 6, 7 };
 611
 612 static const struct chv_pingroup southeast_groups[] = {
 613         PIN_GROUP("pwm0_grp", southeast_pwm0_pins, 1, false),
 614         PIN_GROUP("pwm1_grp", southeast_pwm1_pins, 1, false),
 615         PIN_GROUP("sdmmc1_grp", southeast_sdmmc1_pins, 1, false),
 616         PIN_GROUP("sdmmc2_grp", southeast_sdmmc2_pins, 1, false),
 617         PIN_GROUP("sdmmc3_grp", southeast_sdmmc3_pins, 1, false),
 618         PIN_GROUP("spi1_grp", southeast_spi1_pins, 1, false),
 619         PIN_GROUP("spi2_grp", southeast_spi2_pins, 4, false),
 620 };
 621
 622 static const char * const southeast_pwm0_groups[] = { "pwm0_grp" };
 623 static const char * const southeast_pwm1_groups[] = { "pwm1_grp" };
 624 static const char * const southeast_sdmmc1_groups[] = { "sdmmc1_grp" };
 625 static const char * const southeast_sdmmc2_groups[] = { "sdmmc2_grp" };
 626 static const char * const southeast_sdmmc3_groups[] = { "sdmmc3_grp" };
 627 static const char * const southeast_spi1_groups[] = { "spi1_grp" };
 628 static const char * const southeast_spi2_groups[] = { "spi2_grp" };
 629
 630 static const struct chv_function southeast_functions[] = {
 631         FUNCTION("pwm0", southeast_pwm0_groups),
 632         FUNCTION("pwm1", southeast_pwm1_groups),
 633         FUNCTION("sdmmc1", southeast_sdmmc1_groups),
 634         FUNCTION("sdmmc2", southeast_sdmmc2_groups),
 635         FUNCTION("sdmmc3", southeast_sdmmc3_groups),
 636         FUNCTION("spi1", southeast_spi1_groups),
 637         FUNCTION("spi2", southeast_spi2_groups),
 638 };
 639
 640 static const struct chv_gpio_pinrange southeast_gpio_ranges[] = {
 641         GPIO_PINRANGE(0, 7),
 642         GPIO_PINRANGE(15, 26),
 643         GPIO_PINRANGE(30, 35),
 644         GPIO_PINRANGE(45, 52),
 645         GPIO_PINRANGE(60, 69),
 646         GPIO_PINRANGE(75, 85),
 647 };
 648
 649 static const struct chv_community southeast_community = {
 650         .uid = "4",
 651         .pins = southeast_pins,
 652         .npins = ARRAY_SIZE(southeast_pins),
 653         .groups = southeast_groups,
 654         .ngroups = ARRAY_SIZE(southeast_groups),
 655         .functions = southeast_functions,
 656         .nfunctions = ARRAY_SIZE(southeast_functions),
 657         .gpio_ranges = southeast_gpio_ranges,
 658         .ngpio_ranges = ARRAY_SIZE(southeast_gpio_ranges),
 659         .nirqs = 16,
 660         .acpi_space_id = 0x94,
 661 };
 662
 663 static const struct chv_community *chv_communities[] = {
 664         &southwest_community,
 665         &north_community,
 666         &east_community,
 667         &southeast_community,
 668 };
 669
 670 /*
 671  * Lock to serialize register accesses
 672  *
 673  * Due to a silicon issue, a shared lock must be used to prevent
 674  * concurrent accesses across the 4 GPIO controllers.
 675  *
 676  * See Intel Atom Z8000 Processor Series Specification Update (Rev. 005),
 677  * errata #CHT34, for further information.
 678  */
 679 static DEFINE_RAW_SPINLOCK(chv_lock);
 680
 681 static void __iomem *chv_padreg(struct chv_pinctrl *pctrl, unsigned offset,
 682                                 unsigned reg)
 683 {
 684         unsigned family_no = offset / MAX_FAMILY_PAD_GPIO_NO;
 685         unsigned pad_no = offset % MAX_FAMILY_PAD_GPIO_NO;
 686
 687         offset = FAMILY_PAD_REGS_OFF + FAMILY_PAD_REGS_SIZE * family_no +
 688                  GPIO_REGS_SIZE * pad_no;
 689
 690         return pctrl->regs + offset + reg;
 691 }
 692
 693 static void chv_writel(u32 value, void __iomem *reg)
 694 {
 695         writel(value, reg);
 696         /* simple readback to confirm the bus transferring done */
 697         readl(reg);
 698 }
 699
 700 /* When Pad Cfg is locked, driver can only change GPIOTXState or GPIORXState */
 701 static bool chv_pad_locked(struct chv_pinctrl *pctrl, unsigned offset)
 702 {
 703         void __iomem *reg;
 704
 705         reg = chv_padreg(pctrl, offset, CHV_PADCTRL1);
 706         return readl(reg) & CHV_PADCTRL1_CFGLOCK;
 707 }
 708
 709 static int chv_get_groups_count(struct pinctrl_dev *pctldev)
 710 {
 711         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 712
 713         return pctrl->community->ngroups;
 714 }
 715
 716 static const char *chv_get_group_name(struct pinctrl_dev *pctldev,
 717                                       unsigned group)
 718 {
 719         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 720
 721         return pctrl->community->groups[group].name;
 722 }
 723
 724 static int chv_get_group_pins(struct pinctrl_dev *pctldev, unsigned group,
 725                               const unsigned **pins, unsigned *npins)
 726 {
 727         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 728
 729         *pins = pctrl->community->groups[group].pins;
 730         *npins = pctrl->community->groups[group].npins;
 731         return 0;
 732 }
 733
 734 static void chv_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
 735                              unsigned offset)
 736 {
 737         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 738         unsigned long flags;
 739         u32 ctrl0, ctrl1;
 740         bool locked;
 741
 742         raw_spin_lock_irqsave(&chv_lock, flags);
 743
 744         ctrl0 = readl(chv_padreg(pctrl, offset, CHV_PADCTRL0));
 745         ctrl1 = readl(chv_padreg(pctrl, offset, CHV_PADCTRL1));
 746         locked = chv_pad_locked(pctrl, offset);
 747
 748         raw_spin_unlock_irqrestore(&chv_lock, flags);
 749
 750         if (ctrl0 & CHV_PADCTRL0_GPIOEN) {
 751                 seq_puts(s, "GPIO ");
 752         } else {
 753                 u32 mode;
 754
 755                 mode = ctrl0 & CHV_PADCTRL0_PMODE_MASK;
 756                 mode >>= CHV_PADCTRL0_PMODE_SHIFT;
 757
 758                 seq_printf(s, "mode %d ", mode);
 759         }
 760
 761         seq_printf(s, "0x%08x 0x%08x", ctrl0, ctrl1);
 762
 763         if (locked)
 764                 seq_puts(s, " [LOCKED]");
 765 }
 766
 767 static const struct pinctrl_ops chv_pinctrl_ops = {
 768         .get_groups_count = chv_get_groups_count,
 769         .get_group_name = chv_get_group_name,
 770         .get_group_pins = chv_get_group_pins,
 771         .pin_dbg_show = chv_pin_dbg_show,
 772 };
 773
 774 static int chv_get_functions_count(struct pinctrl_dev *pctldev)
 775 {
 776         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 777
 778         return pctrl->community->nfunctions;
 779 }
 780
 781 static const char *chv_get_function_name(struct pinctrl_dev *pctldev,
 782                                          unsigned function)
 783 {
 784         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 785
 786         return pctrl->community->functions[function].name;
 787 }
 788
 789 static int chv_get_function_groups(struct pinctrl_dev *pctldev,
 790                                    unsigned function,
 791                                    const char * const **groups,
 792                                    unsigned * const ngroups)
 793 {
 794         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 795
 796         *groups = pctrl->community->functions[function].groups;
 797         *ngroups = pctrl->community->functions[function].ngroups;
 798         return 0;
 799 }
 800
 801 static int chv_pinmux_set_mux(struct pinctrl_dev *pctldev, unsigned function,
 802                               unsigned group)
 803 {
 804         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 805         const struct chv_pingroup *grp;
 806         unsigned long flags;
 807         int i;
 808
 809         grp = &pctrl->community->groups[group];
 810
 811         raw_spin_lock_irqsave(&chv_lock, flags);
 812
 813         /* Check first that the pad is not locked */
 814         for (i = 0; i < grp->npins; i++) {
 815                 if (chv_pad_locked(pctrl, grp->pins[i])) {
 816                         dev_warn(pctrl->dev, "unable to set mode for locked pin %u\n",
 817                                  grp->pins[i]);
 818                         raw_spin_unlock_irqrestore(&chv_lock, flags);
 819                         return -EBUSY;
 820                 }
 821         }
 822
 823         for (i = 0; i < grp->npins; i++) {
 824                 const struct chv_alternate_function *altfunc = &grp->altfunc;
 825                 int pin = grp->pins[i];
 826                 void __iomem *reg;
 827                 u32 value;
 828
 829                 /* Check if there is pin-specific config */
 830                 if (grp->overrides) {
 831                         int j;
 832
 833                         for (j = 0; j < grp->noverrides; j++) {
 834                                 if (grp->overrides[j].pin == pin) {
 835                                         altfunc = &grp->overrides[j];
 836                                         break;
 837                                 }
 838                         }
 839                 }
 840
 841                 reg = chv_padreg(pctrl, pin, CHV_PADCTRL0);
 842                 value = readl(reg);
 843                 /* Disable GPIO mode */
 844                 value &= ~CHV_PADCTRL0_GPIOEN;
 845                 /* Set to desired mode */
 846                 value &= ~CHV_PADCTRL0_PMODE_MASK;
 847                 value |= altfunc->mode << CHV_PADCTRL0_PMODE_SHIFT;
 848                 chv_writel(value, reg);
 849
 850                 /* Update for invert_oe */
 851                 reg = chv_padreg(pctrl, pin, CHV_PADCTRL1);
 852                 value = readl(reg) & ~CHV_PADCTRL1_INVRXTX_MASK;
 853                 if (altfunc->invert_oe)
 854                         value |= CHV_PADCTRL1_INVRXTX_TXENABLE;
 855                 chv_writel(value, reg);
 856
 857                 dev_dbg(pctrl->dev, "configured pin %u mode %u OE %sinverted\n",
 858                         pin, altfunc->mode, altfunc->invert_oe ? "" : "not ");
 859         }
 860
 861         raw_spin_unlock_irqrestore(&chv_lock, flags);
 862
 863         return 0;
 864 }
 865
 866 static int chv_gpio_request_enable(struct pinctrl_dev *pctldev,
 867                                    struct pinctrl_gpio_range *range,
 868                                    unsigned offset)
 869 {
 870         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 871         unsigned long flags;
 872         void __iomem *reg;
 873         u32 value;
 874
 875         raw_spin_lock_irqsave(&chv_lock, flags);
 876
 877         if (chv_pad_locked(pctrl, offset)) {
 878                 value = readl(chv_padreg(pctrl, offset, CHV_PADCTRL0));
 879                 if (!(value & CHV_PADCTRL0_GPIOEN)) {
 880                         /* Locked so cannot enable */
 881                         raw_spin_unlock_irqrestore(&chv_lock, flags);
 882                         return -EBUSY;
 883                 }
 884         } else {
 885                 int i;
 886
 887                 /* Reset the interrupt mapping */
 888                 for (i = 0; i < ARRAY_SIZE(pctrl->intr_lines); i++) {
 889                         if (pctrl->intr_lines[i] == offset) {
 890                                 pctrl->intr_lines[i] = 0;
 891                                 break;
 892                         }
 893                 }
 894
 895                 /* Disable interrupt generation */
 896                 reg = chv_padreg(pctrl, offset, CHV_PADCTRL1);
 897                 value = readl(reg);
 898                 value &= ~CHV_PADCTRL1_INTWAKECFG_MASK;
 899                 value &= ~CHV_PADCTRL1_INVRXTX_MASK;
 900                 chv_writel(value, reg);
 901
 902                 reg = chv_padreg(pctrl, offset, CHV_PADCTRL0);
 903                 value = readl(reg);
 904
 905                 /*
 906                  * If the pin is in HiZ mode (both TX and RX buffers are
 907                  * disabled) we turn it to be input now.
 908                  */
 909                 if ((value & CHV_PADCTRL0_GPIOCFG_MASK) ==
 910                      (CHV_PADCTRL0_GPIOCFG_HIZ << CHV_PADCTRL0_GPIOCFG_SHIFT)) {
 911                         value &= ~CHV_PADCTRL0_GPIOCFG_MASK;
 912                         value |= CHV_PADCTRL0_GPIOCFG_GPI <<
 913                                 CHV_PADCTRL0_GPIOCFG_SHIFT;
 914                 }
 915
 916                 /* Switch to a GPIO mode */
 917                 value |= CHV_PADCTRL0_GPIOEN;
 918                 chv_writel(value, reg);
 919         }
 920
 921         raw_spin_unlock_irqrestore(&chv_lock, flags);
 922
 923         return 0;
 924 }
 925
 926 static void chv_gpio_disable_free(struct pinctrl_dev *pctldev,
 927                                   struct pinctrl_gpio_range *range,
 928                                   unsigned offset)
 929 {
 930         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 931         unsigned long flags;
 932         void __iomem *reg;
 933         u32 value;
 934
 935         raw_spin_lock_irqsave(&chv_lock, flags);
 936
 937         reg = chv_padreg(pctrl, offset, CHV_PADCTRL0);
 938         value = readl(reg) & ~CHV_PADCTRL0_GPIOEN;
 939         chv_writel(value, reg);
 940
 941         raw_spin_unlock_irqrestore(&chv_lock, flags);
 942 }
 943
 944 static int chv_gpio_set_direction(struct pinctrl_dev *pctldev,
 945                                   struct pinctrl_gpio_range *range,
 946                                   unsigned offset, bool input)
 947 {
 948         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 949         void __iomem *reg = chv_padreg(pctrl, offset, CHV_PADCTRL0);
 950         unsigned long flags;
 951         u32 ctrl0;
 952
 953         raw_spin_lock_irqsave(&chv_lock, flags);
 954
 955         ctrl0 = readl(reg) & ~CHV_PADCTRL0_GPIOCFG_MASK;
 956         if (input)
 957                 ctrl0 |= CHV_PADCTRL0_GPIOCFG_GPI << CHV_PADCTRL0_GPIOCFG_SHIFT;
 958         else
 959                 ctrl0 |= CHV_PADCTRL0_GPIOCFG_GPO << CHV_PADCTRL0_GPIOCFG_SHIFT;
 960         chv_writel(ctrl0, reg);
 961
 962         raw_spin_unlock_irqrestore(&chv_lock, flags);
 963
 964         return 0;
 965 }
 966
 967 static const struct pinmux_ops chv_pinmux_ops = {
 968         .get_functions_count = chv_get_functions_count,
 969         .get_function_name = chv_get_function_name,
 970         .get_function_groups = chv_get_function_groups,
 971         .set_mux = chv_pinmux_set_mux,
 972         .gpio_request_enable = chv_gpio_request_enable,
 973         .gpio_disable_free = chv_gpio_disable_free,
 974         .gpio_set_direction = chv_gpio_set_direction,
 975 };
 976
 977 static int chv_config_get(struct pinctrl_dev *pctldev, unsigned pin,
 978                           unsigned long *config)
 979 {
 980         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 981         enum pin_config_param param = pinconf_to_config_param(*config);
 982         unsigned long flags;
 983         u32 ctrl0, ctrl1;
 984         u16 arg = 0;
 985         u32 term;
 986
 987         raw_spin_lock_irqsave(&chv_lock, flags);
 988         ctrl0 = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0));
 989         ctrl1 = readl(chv_padreg(pctrl, pin, CHV_PADCTRL1));
 990         raw_spin_unlock_irqrestore(&chv_lock, flags);
 991
 992         term = (ctrl0 & CHV_PADCTRL0_TERM_MASK) >> CHV_PADCTRL0_TERM_SHIFT;
 993
 994         switch (param) {
 995         case PIN_CONFIG_BIAS_DISABLE:
 996                 if (term)
 997                         return -EINVAL;
 998                 break;
 999
1000         case PIN_CONFIG_BIAS_PULL_UP:
1001                 if (!(ctrl0 & CHV_PADCTRL0_TERM_UP))
1002                         return -EINVAL;
1003
1004                 switch (term) {
1005                 case CHV_PADCTRL0_TERM_20K:
1006                         arg = 20000;
1007                         break;
1008                 case CHV_PADCTRL0_TERM_5K:
1009                         arg = 5000;
1010                         break;
1011                 case CHV_PADCTRL0_TERM_1K:
1012                         arg = 1000;
1013                         break;
1014                 }
1015
1016                 break;
1017
1018         case PIN_CONFIG_BIAS_PULL_DOWN:
1019                 if (!term || (ctrl0 & CHV_PADCTRL0_TERM_UP))
1020                         return -EINVAL;
1021
1022                 switch (term) {
1023                 case CHV_PADCTRL0_TERM_20K:
1024                         arg = 20000;
1025                         break;
1026                 case CHV_PADCTRL0_TERM_5K:
1027                         arg = 5000;
1028                         break;
1029                 }
1030
1031                 break;
1032
1033         case PIN_CONFIG_DRIVE_OPEN_DRAIN:
1034                 if (!(ctrl1 & CHV_PADCTRL1_ODEN))
1035                         return -EINVAL;
1036                 break;
1037
1038         case PIN_CONFIG_BIAS_HIGH_IMPEDANCE: {
1039                 u32 cfg;
1040
1041                 cfg = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK;
1042                 cfg >>= CHV_PADCTRL0_GPIOCFG_SHIFT;
1043                 if (cfg != CHV_PADCTRL0_GPIOCFG_HIZ)
1044                         return -EINVAL;
1045
1046                 break;
1047         }
1048
1049         default:
1050                 return -ENOTSUPP;
1051         }
1052
1053         *config = pinconf_to_config_packed(param, arg);
1054         return 0;
1055 }
1056
1057 static int chv_config_set_pull(struct chv_pinctrl *pctrl, unsigned pin,
1058                                enum pin_config_param param, u32 arg)
1059 {
1060         void __iomem *reg = chv_padreg(pctrl, pin, CHV_PADCTRL0);
1061         unsigned long flags;
1062         u32 ctrl0, pull;
1063
1064         raw_spin_lock_irqsave(&chv_lock, flags);
1065         ctrl0 = readl(reg);
1066
1067         switch (param) {
1068         case PIN_CONFIG_BIAS_DISABLE:
1069                 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP);
1070                 break;
1071
1072         case PIN_CONFIG_BIAS_PULL_UP:
1073                 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP);
1074
1075                 switch (arg) {
1076                 case 1000:
1077                         /* For 1k there is only pull up */
1078                         pull = CHV_PADCTRL0_TERM_1K << CHV_PADCTRL0_TERM_SHIFT;
1079                         break;
1080                 case 5000:
1081                         pull = CHV_PADCTRL0_TERM_5K << CHV_PADCTRL0_TERM_SHIFT;
1082                         break;
1083                 case 20000:
1084                         pull = CHV_PADCTRL0_TERM_20K << CHV_PADCTRL0_TERM_SHIFT;
1085                         break;
1086                 default:
1087                         raw_spin_unlock_irqrestore(&chv_lock, flags);
1088                         return -EINVAL;
1089                 }
1090
1091                 ctrl0 |= CHV_PADCTRL0_TERM_UP | pull;
1092                 break;
1093
1094         case PIN_CONFIG_BIAS_PULL_DOWN:
1095                 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP);
1096
1097                 switch (arg) {
1098                 case 5000:
1099                         pull = CHV_PADCTRL0_TERM_5K << CHV_PADCTRL0_TERM_SHIFT;
1100                         break;
1101                 case 20000:
1102                         pull = CHV_PADCTRL0_TERM_20K << CHV_PADCTRL0_TERM_SHIFT;
1103                         break;
1104                 default:
1105                         raw_spin_unlock_irqrestore(&chv_lock, flags);
1106                         return -EINVAL;
1107                 }
1108
1109                 ctrl0 |= pull;
1110                 break;
1111
1112         default:
1113                 raw_spin_unlock_irqrestore(&chv_lock, flags);
1114                 return -EINVAL;
1115         }
1116
1117         chv_writel(ctrl0, reg);
1118         raw_spin_unlock_irqrestore(&chv_lock, flags);
1119
1120         return 0;
1121 }
1122
1123 static int chv_config_set_oden(struct chv_pinctrl *pctrl, unsigned int pin,
1124                                bool enable)
1125 {
1126         void __iomem *reg = chv_padreg(pctrl, pin, CHV_PADCTRL1);
1127         unsigned long flags;
1128         u32 ctrl1;
1129
1130         raw_spin_lock_irqsave(&chv_lock, flags);
1131         ctrl1 = readl(reg);
1132
1133         if (enable)
1134                 ctrl1 |= CHV_PADCTRL1_ODEN;
1135         else
1136                 ctrl1 &= ~CHV_PADCTRL1_ODEN;
1137
1138         chv_writel(ctrl1, reg);
1139         raw_spin_unlock_irqrestore(&chv_lock, flags);
1140
1141         return 0;
1142 }
1143
1144 static int chv_config_set(struct pinctrl_dev *pctldev, unsigned pin,
1145                           unsigned long *configs, unsigned nconfigs)
1146 {
1147         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
1148         enum pin_config_param param;
1149         int i, ret;
1150         u32 arg;
1151
1152         if (chv_pad_locked(pctrl, pin))
1153                 return -EBUSY;
1154
1155         for (i = 0; i < nconfigs; i++) {
1156                 param = pinconf_to_config_param(configs[i]);
1157                 arg = pinconf_to_config_argument(configs[i]);
1158
1159                 switch (param) {
1160                 case PIN_CONFIG_BIAS_DISABLE:
1161                 case PIN_CONFIG_BIAS_PULL_UP:
1162                 case PIN_CONFIG_BIAS_PULL_DOWN:
1163                         ret = chv_config_set_pull(pctrl, pin, param, arg);
1164                         if (ret)
1165                                 return ret;
1166                         break;
1167
1168                 case PIN_CONFIG_DRIVE_PUSH_PULL:
1169                         ret = chv_config_set_oden(pctrl, pin, false);
1170                         if (ret)
1171                                 return ret;
1172                         break;
1173
1174                 case PIN_CONFIG_DRIVE_OPEN_DRAIN:
1175                         ret = chv_config_set_oden(pctrl, pin, true);
1176                         if (ret)
1177                                 return ret;
1178                         break;
1179
1180                 default:
1181                         return -ENOTSUPP;
1182                 }
1183
1184                 dev_dbg(pctrl->dev, "pin %d set config %d arg %u\n", pin,
1185                         param, arg);
1186         }
1187
1188         return 0;
1189 }
1190
1191 static int chv_config_group_get(struct pinctrl_dev *pctldev,
1192                                 unsigned int group,
1193                                 unsigned long *config)
1194 {
1195         const unsigned int *pins;
1196         unsigned int npins;
1197         int ret;
1198
1199         ret = chv_get_group_pins(pctldev, group, &pins, &npins);
1200         if (ret)
1201                 return ret;
1202
1203         ret = chv_config_get(pctldev, pins[0], config);
1204         if (ret)
1205                 return ret;
1206
1207         return 0;
1208 }
1209
1210 static int chv_config_group_set(struct pinctrl_dev *pctldev,
1211                                 unsigned int group, unsigned long *configs,
1212                                 unsigned int num_configs)
1213 {
1214         const unsigned int *pins;
1215         unsigned int npins;
1216         int i, ret;
1217
1218         ret = chv_get_group_pins(pctldev, group, &pins, &npins);
1219         if (ret)
1220                 return ret;
1221
1222         for (i = 0; i < npins; i++) {
1223                 ret = chv_config_set(pctldev, pins[i], configs, num_configs);
1224                 if (ret)
1225                         return ret;
1226         }
1227
1228         return 0;
1229 }
1230
1231 static const struct pinconf_ops chv_pinconf_ops = {
1232         .is_generic = true,
1233         .pin_config_set = chv_config_set,
1234         .pin_config_get = chv_config_get,
1235         .pin_config_group_get = chv_config_group_get,
1236         .pin_config_group_set = chv_config_group_set,
1237 };
1238
1239 static struct pinctrl_desc chv_pinctrl_desc = {
1240         .pctlops = &chv_pinctrl_ops,
1241         .pmxops = &chv_pinmux_ops,
1242         .confops = &chv_pinconf_ops,
1243         .owner = THIS_MODULE,
1244 };
1245
1246 static int chv_gpio_get(struct gpio_chip *chip, unsigned offset)
1247 {
1248         struct chv_pinctrl *pctrl = gpiochip_get_data(chip);
1249         unsigned long flags;
1250         u32 ctrl0, cfg;
1251
1252         raw_spin_lock_irqsave(&chv_lock, flags);
1253         ctrl0 = readl(chv_padreg(pctrl, offset, CHV_PADCTRL0));
1254         raw_spin_unlock_irqrestore(&chv_lock, flags);
1255
1256         cfg = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK;
1257         cfg >>= CHV_PADCTRL0_GPIOCFG_SHIFT;
1258
1259         if (cfg == CHV_PADCTRL0_GPIOCFG_GPO)
1260                 return !!(ctrl0 & CHV_PADCTRL0_GPIOTXSTATE);
1261         return !!(ctrl0 & CHV_PADCTRL0_GPIORXSTATE);
1262 }
1263
1264 static void chv_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
1265 {
1266         struct chv_pinctrl *pctrl = gpiochip_get_data(chip);
1267         unsigned long flags;
1268         void __iomem *reg;
1269         u32 ctrl0;
1270
1271         raw_spin_lock_irqsave(&chv_lock, flags);
1272
1273         reg = chv_padreg(pctrl, offset, CHV_PADCTRL0);
1274         ctrl0 = readl(reg);
1275
1276         if (value)
1277                 ctrl0 |= CHV_PADCTRL0_GPIOTXSTATE;
1278         else
1279                 ctrl0 &= ~CHV_PADCTRL0_GPIOTXSTATE;
1280
1281         chv_writel(ctrl0, reg);
1282
1283         raw_spin_unlock_irqrestore(&chv_lock, flags);
1284 }
1285
1286 static int chv_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
1287 {
1288         struct chv_pinctrl *pctrl = gpiochip_get_data(chip);
1289         u32 ctrl0, direction;
1290         unsigned long flags;
1291
1292         raw_spin_lock_irqsave(&chv_lock, flags);
1293         ctrl0 = readl(chv_padreg(pctrl, offset, CHV_PADCTRL0));
1294         raw_spin_unlock_irqrestore(&chv_lock, flags);
1295
1296         direction = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK;
1297         direction >>= CHV_PADCTRL0_GPIOCFG_SHIFT;
1298
1299         return direction != CHV_PADCTRL0_GPIOCFG_GPO;
1300 }
1301
1302 static int chv_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
1303 {
1304         return pinctrl_gpio_direction_input(chip->base + offset);
1305 }
1306
1307 static int chv_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
1308                                      int value)
1309 {
1310         chv_gpio_set(chip, offset, value);
1311         return pinctrl_gpio_direction_output(chip->base + offset);
1312 }
1313
1314 static const struct gpio_chip chv_gpio_chip = {
1315         .owner = THIS_MODULE,
1316         .request = gpiochip_generic_request,
1317         .free = gpiochip_generic_free,
1318         .get_direction = chv_gpio_get_direction,
1319         .direction_input = chv_gpio_direction_input,
1320         .direction_output = chv_gpio_direction_output,
1321         .get = chv_gpio_get,
1322         .set = chv_gpio_set,
1323 };
1324
1325 static void chv_gpio_irq_ack(struct irq_data *d)
1326 {
1327         struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1328         struct chv_pinctrl *pctrl = gpiochip_get_data(gc);
1329         int pin = irqd_to_hwirq(d);
1330         u32 intr_line;
1331
1332         raw_spin_lock(&chv_lock);
1333
1334         intr_line = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0));
1335         intr_line &= CHV_PADCTRL0_INTSEL_MASK;
1336         intr_line >>= CHV_PADCTRL0_INTSEL_SHIFT;
1337         chv_writel(BIT(intr_line), pctrl->regs + CHV_INTSTAT);
1338
1339         raw_spin_unlock(&chv_lock);
1340 }
1341
1342 static void chv_gpio_irq_mask_unmask(struct irq_data *d, bool mask)
1343 {
1344         struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1345         struct chv_pinctrl *pctrl = gpiochip_get_data(gc);
1346         int pin = irqd_to_hwirq(d);
1347         u32 value, intr_line;
1348         unsigned long flags;
1349
1350         raw_spin_lock_irqsave(&chv_lock, flags);
1351
1352         intr_line = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0));
1353         intr_line &= CHV_PADCTRL0_INTSEL_MASK;
1354         intr_line >>= CHV_PADCTRL0_INTSEL_SHIFT;
1355
1356         value = readl(pctrl->regs + CHV_INTMASK);
1357         if (mask)
1358                 value &= ~BIT(intr_line);
1359         else
1360                 value |= BIT(intr_line);
1361         chv_writel(value, pctrl->regs + CHV_INTMASK);
1362
1363         raw_spin_unlock_irqrestore(&chv_lock, flags);
1364 }
1365
1366 static void chv_gpio_irq_mask(struct irq_data *d)
1367 {
1368         chv_gpio_irq_mask_unmask(d, true);
1369 }
1370
1371 static void chv_gpio_irq_unmask(struct irq_data *d)
1372 {
1373         chv_gpio_irq_mask_unmask(d, false);
1374 }
1375
1376 static unsigned chv_gpio_irq_startup(struct irq_data *d)
1377 {
1378         /*
1379          * Check if the interrupt has been requested with 0 as triggering
1380          * type. In that case it is assumed that the current values
1381          * programmed to the hardware are used (e.g BIOS configured
1382          * defaults).
1383          *
1384          * In that case ->irq_set_type() will never be called so we need to
1385          * read back the values from hardware now, set correct flow handler
1386          * and update mappings before the interrupt is being used.
1387          */
1388         if (irqd_get_trigger_type(d) == IRQ_TYPE_NONE) {
1389                 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1390                 struct chv_pinctrl *pctrl = gpiochip_get_data(gc);
1391                 unsigned pin = irqd_to_hwirq(d);
1392                 irq_flow_handler_t handler;
1393                 unsigned long flags;
1394                 u32 intsel, value;
1395
1396                 raw_spin_lock_irqsave(&chv_lock, flags);
1397                 intsel = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0));
1398                 intsel &= CHV_PADCTRL0_INTSEL_MASK;
1399                 intsel >>= CHV_PADCTRL0_INTSEL_SHIFT;
1400
1401                 value = readl(chv_padreg(pctrl, pin, CHV_PADCTRL1));
1402                 if (value & CHV_PADCTRL1_INTWAKECFG_LEVEL)
1403                         handler = handle_level_irq;
1404                 else
1405                         handler = handle_edge_irq;
1406
1407                 if (!pctrl->intr_lines[intsel]) {
1408                         irq_set_handler_locked(d, handler);
1409                         pctrl->intr_lines[intsel] = pin;
1410                 }
1411                 raw_spin_unlock_irqrestore(&chv_lock, flags);
1412         }
1413
1414         chv_gpio_irq_unmask(d);
1415         return 0;
1416 }
1417
1418 static int chv_gpio_irq_type(struct irq_data *d, unsigned type)
1419 {
1420         struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1421         struct chv_pinctrl *pctrl = gpiochip_get_data(gc);
1422         unsigned pin = irqd_to_hwirq(d);
1423         unsigned long flags;
1424         u32 value;
1425
1426         raw_spin_lock_irqsave(&chv_lock, flags);
1427
1428         /*
1429          * Pins which can be used as shared interrupt are configured in
1430          * BIOS. Driver trusts BIOS configurations and assigns different
1431          * handler according to the irq type.
1432          *
1433          * Driver needs to save the mapping between each pin and
1434          * its interrupt line.
1435          * 1. If the pin cfg is locked in BIOS:
1436          *      Trust BIOS has programmed IntWakeCfg bits correctly,
1437          *      driver just needs to save the mapping.
1438          * 2. If the pin cfg is not locked in BIOS:
1439          *      Driver programs the IntWakeCfg bits and save the mapping.
1440          */
1441         if (!chv_pad_locked(pctrl, pin)) {
1442                 void __iomem *reg = chv_padreg(pctrl, pin, CHV_PADCTRL1);
1443
1444                 value = readl(reg);
1445                 value &= ~CHV_PADCTRL1_INTWAKECFG_MASK;
1446                 value &= ~CHV_PADCTRL1_INVRXTX_MASK;
1447
1448                 if (type & IRQ_TYPE_EDGE_BOTH) {
1449                         if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH)
1450                                 value |= CHV_PADCTRL1_INTWAKECFG_BOTH;
1451                         else if (type & IRQ_TYPE_EDGE_RISING)
1452                                 value |= CHV_PADCTRL1_INTWAKECFG_RISING;
1453                         else if (type & IRQ_TYPE_EDGE_FALLING)
1454                                 value |= CHV_PADCTRL1_INTWAKECFG_FALLING;
1455                 } else if (type & IRQ_TYPE_LEVEL_MASK) {
1456                         value |= CHV_PADCTRL1_INTWAKECFG_LEVEL;
1457                         if (type & IRQ_TYPE_LEVEL_LOW)
1458                                 value |= CHV_PADCTRL1_INVRXTX_RXDATA;
1459                 }
1460
1461                 chv_writel(value, reg);
1462         }
1463
1464         value = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0));
1465         value &= CHV_PADCTRL0_INTSEL_MASK;
1466         value >>= CHV_PADCTRL0_INTSEL_SHIFT;
1467
1468         pctrl->intr_lines[value] = pin;
1469
1470         if (type & IRQ_TYPE_EDGE_BOTH)
1471                 irq_set_handler_locked(d, handle_edge_irq);
1472         else if (type & IRQ_TYPE_LEVEL_MASK)
1473                 irq_set_handler_locked(d, handle_level_irq);
1474
1475         raw_spin_unlock_irqrestore(&chv_lock, flags);
1476
1477         return 0;
1478 }
1479
1480 static struct irq_chip chv_gpio_irqchip = {
1481         .name = "chv-gpio",
1482         .irq_startup = chv_gpio_irq_startup,
1483         .irq_ack = chv_gpio_irq_ack,
1484         .irq_mask = chv_gpio_irq_mask,
1485         .irq_unmask = chv_gpio_irq_unmask,
1486         .irq_set_type = chv_gpio_irq_type,
1487         .flags = IRQCHIP_SKIP_SET_WAKE,
1488 };
1489
1490 static void chv_gpio_irq_handler(struct irq_desc *desc)
1491 {
1492         struct gpio_chip *gc = irq_desc_get_handler_data(desc);
1493         struct chv_pinctrl *pctrl = gpiochip_get_data(gc);
1494         struct irq_chip *chip = irq_desc_get_chip(desc);
1495         unsigned long pending;
1496         u32 intr_line;
1497
1498         chained_irq_enter(chip, desc);
1499
1500         pending = readl(pctrl->regs + CHV_INTSTAT);
1501         for_each_set_bit(intr_line, &pending, pctrl->community->nirqs) {
1502                 unsigned irq, offset;
1503
1504                 offset = pctrl->intr_lines[intr_line];
1505                 irq = irq_find_mapping(gc->irq.domain, offset);
1506                 generic_handle_irq(irq);
1507         }
1508
1509         chained_irq_exit(chip, desc);
1510 }
1511
1512 /*
1513  * Certain machines seem to hardcode Linux IRQ numbers in their ACPI
1514  * tables. Since we leave GPIOs that are not capable of generating
1515  * interrupts out of the irqdomain the numbering will be different and
1516  * cause devices using the hardcoded IRQ numbers fail. In order not to
1517  * break such machines we will only mask pins from irqdomain if the machine
1518  * is not listed below.
1519  */
1520 static const struct dmi_system_id chv_no_valid_mask[] = {
1521         /* See https://bugzilla.kernel.org/show_bug.cgi?id=194945 */
1522         {
1523                 .ident = "Intel_Strago based Chromebooks (All models)",
1524                 .matches = {
1525                         DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
1526                         DMI_MATCH(DMI_PRODUCT_FAMILY, "Intel_Strago"),
1527                         DMI_MATCH(DMI_BOARD_VERSION, "1.0"),
1528                 },
1529         },
1530         {
1531                 .ident = "HP Chromebook 11 G5 (Setzer)",
1532                 .matches = {
1533                         DMI_MATCH(DMI_SYS_VENDOR, "HP"),
1534                         DMI_MATCH(DMI_PRODUCT_NAME, "Setzer"),
1535                         DMI_MATCH(DMI_BOARD_VERSION, "1.0"),
1536                 },
1537         },
1538         {
1539                 .ident = "Acer Chromebook R11 (Cyan)",
1540                 .matches = {
1541                         DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
1542                         DMI_MATCH(DMI_PRODUCT_NAME, "Cyan"),
1543                         DMI_MATCH(DMI_BOARD_VERSION, "1.0"),
1544                 },
1545         },
1546         {
1547                 .ident = "Samsung Chromebook 3 (Celes)",
1548                 .matches = {
1549                         DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
1550                         DMI_MATCH(DMI_PRODUCT_NAME, "Celes"),
1551                         DMI_MATCH(DMI_BOARD_VERSION, "1.0"),
1552                 },
1553         },
1554         {}
1555 };
1556
1557 static int chv_gpio_probe(struct chv_pinctrl *pctrl, int irq)
1558 {
1559         const struct chv_gpio_pinrange *range;
1560         struct gpio_chip *chip = &pctrl->chip;
1561         bool need_valid_mask = !dmi_check_system(chv_no_valid_mask);
1562         const struct chv_community *community = pctrl->community;
1563         int ret, i, irq_base;
1564
1565         *chip = chv_gpio_chip;
1566
1567         chip->ngpio = community->pins[community->npins - 1].number + 1;
1568         chip->label = dev_name(pctrl->dev);
1569         chip->parent = pctrl->dev;
1570         chip->base = -1;
1571         chip->irq.need_valid_mask = need_valid_mask;
1572
1573         ret = devm_gpiochip_add_data(pctrl->dev, chip, pctrl);
1574         if (ret) {
1575                 dev_err(pctrl->dev, "Failed to register gpiochip\n");
1576                 return ret;
1577         }
1578
1579         for (i = 0; i < community->ngpio_ranges; i++) {
1580                 range = &community->gpio_ranges[i];
1581                 ret = gpiochip_add_pin_range(chip, dev_name(pctrl->dev),
1582                                              range->base, range->base,
1583                                              range->npins);
1584                 if (ret) {
1585                         dev_err(pctrl->dev, "failed to add GPIO pin range\n");
1586                         return ret;
1587                 }
1588         }
1589
1590         /* Do not add GPIOs that can only generate GPEs to the IRQ domain */
1591         for (i = 0; i < community->npins; i++) {
1592                 const struct pinctrl_pin_desc *desc;
1593                 u32 intsel;
1594
1595                 desc = &community->pins[i];
1596
1597                 intsel = readl(chv_padreg(pctrl, desc->number, CHV_PADCTRL0));
1598                 intsel &= CHV_PADCTRL0_INTSEL_MASK;
1599                 intsel >>= CHV_PADCTRL0_INTSEL_SHIFT;
1600
1601                 if (need_valid_mask && intsel >= community->nirqs)
1602                         clear_bit(i, chip->irq.valid_mask);
1603         }
1604
1605         /*
1606          * The same set of machines in chv_no_valid_mask[] have incorrectly
1607          * configured GPIOs that generate spurious interrupts so we use
1608          * this same list to apply another quirk for them.
1609          *
1610          * See also https://bugzilla.kernel.org/show_bug.cgi?id=197953.
1611          */
1612         if (!need_valid_mask) {
1613                 /*
1614                  * Mask all interrupts the community is able to generate
1615                  * but leave the ones that can only generate GPEs unmasked.
1616                  */
1617                 chv_writel(GENMASK(31, pctrl->community->nirqs),
1618                            pctrl->regs + CHV_INTMASK);
1619         }
1620
1621         /* Clear all interrupts */
1622         chv_writel(0xffff, pctrl->regs + CHV_INTSTAT);
1623
1624         if (!need_valid_mask) {
1625                 irq_base = devm_irq_alloc_descs(pctrl->dev, -1, 0,
1626                                                 community->npins, NUMA_NO_NODE);
1627                 if (irq_base < 0) {
1628                         dev_err(pctrl->dev, "Failed to allocate IRQ numbers\n");
1629                         return irq_base;
1630                 }
1631         }
1632
1633         ret = gpiochip_irqchip_add(chip, &chv_gpio_irqchip, 0,
1634                                    handle_bad_irq, IRQ_TYPE_NONE);
1635         if (ret) {
1636                 dev_err(pctrl->dev, "failed to add IRQ chip\n");
1637                 return ret;
1638         }
1639
1640         if (!need_valid_mask) {
1641                 for (i = 0; i < community->ngpio_ranges; i++) {
1642                         range = &community->gpio_ranges[i];
1643
1644                         irq_domain_associate_many(chip->irq.domain, irq_base,
1645                                                   range->base, range->npins);
1646                         irq_base += range->npins;
1647                 }
1648         }
1649
1650         gpiochip_set_chained_irqchip(chip, &chv_gpio_irqchip, irq,
1651                                      chv_gpio_irq_handler);
1652         return 0;
1653 }
1654
1655 static acpi_status chv_pinctrl_mmio_access_handler(u32 function,
1656         acpi_physical_address address, u32 bits, u64 *value,
1657         void *handler_context, void *region_context)
1658 {
1659         struct chv_pinctrl *pctrl = region_context;
1660         unsigned long flags;
1661         acpi_status ret = AE_OK;
1662
1663         raw_spin_lock_irqsave(&chv_lock, flags);
1664
1665         if (function == ACPI_WRITE)
1666                 chv_writel((u32)(*value), pctrl->regs + (u32)address);
1667         else if (function == ACPI_READ)
1668                 *value = readl(pctrl->regs + (u32)address);
1669         else
1670                 ret = AE_BAD_PARAMETER;
1671
1672         raw_spin_unlock_irqrestore(&chv_lock, flags);
1673
1674         return ret;
1675 }
1676
1677 static int chv_pinctrl_probe(struct platform_device *pdev)
1678 {
1679         struct chv_pinctrl *pctrl;
1680         struct acpi_device *adev;
1681         struct resource *res;
1682         acpi_status status;
1683         int ret, irq, i;
1684
1685         adev = ACPI_COMPANION(&pdev->dev);
1686         if (!adev)
1687                 return -ENODEV;
1688
1689         pctrl = devm_kzalloc(&pdev->dev, sizeof(*pctrl), GFP_KERNEL);
1690         if (!pctrl)
1691                 return -ENOMEM;
1692
1693         for (i = 0; i < ARRAY_SIZE(chv_communities); i++)
1694                 if (!strcmp(adev->pnp.unique_id, chv_communities[i]->uid)) {
1695                         pctrl->community = chv_communities[i];
1696                         break;
1697                 }
1698         if (i == ARRAY_SIZE(chv_communities))
1699                 return -ENODEV;
1700
1701         pctrl->dev = &pdev->dev;
1702
1703 #ifdef CONFIG_PM_SLEEP
1704         pctrl->saved_pin_context = devm_kcalloc(pctrl->dev,
1705                 pctrl->community->npins, sizeof(*pctrl->saved_pin_context),
1706                 GFP_KERNEL);
1707         if (!pctrl->saved_pin_context)
1708                 return -ENOMEM;
1709 #endif
1710
1711         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1712         pctrl->regs = devm_ioremap_resource(&pdev->dev, res);
1713         if (IS_ERR(pctrl->regs))
1714                 return PTR_ERR(pctrl->regs);
1715
1716         irq = platform_get_irq(pdev, 0);
1717         if (irq < 0) {
1718                 dev_err(&pdev->dev, "failed to get interrupt number\n");
1719                 return irq;
1720         }
1721
1722         pctrl->pctldesc = chv_pinctrl_desc;
1723         pctrl->pctldesc.name = dev_name(&pdev->dev);
1724         pctrl->pctldesc.pins = pctrl->community->pins;
1725         pctrl->pctldesc.npins = pctrl->community->npins;
1726
1727         pctrl->pctldev = devm_pinctrl_register(&pdev->dev, &pctrl->pctldesc,
1728                                                pctrl);
1729         if (IS_ERR(pctrl->pctldev)) {
1730                 dev_err(&pdev->dev, "failed to register pinctrl driver\n");
1731                 return PTR_ERR(pctrl->pctldev);
1732         }
1733
1734         ret = chv_gpio_probe(pctrl, irq);
1735         if (ret)
1736                 return ret;
1737
1738         status = acpi_install_address_space_handler(adev->handle,
1739                                         pctrl->community->acpi_space_id,
1740                                         chv_pinctrl_mmio_access_handler,
1741                                         NULL, pctrl);
1742         if (ACPI_FAILURE(status))
1743                 dev_err(&pdev->dev, "failed to install ACPI addr space handler\n");
1744
1745         platform_set_drvdata(pdev, pctrl);
1746
1747         return 0;
1748 }
1749
1750 static int chv_pinctrl_remove(struct platform_device *pdev)
1751 {
1752         struct chv_pinctrl *pctrl = platform_get_drvdata(pdev);
1753
1754         acpi_remove_address_space_handler(ACPI_COMPANION(&pdev->dev),
1755                                           pctrl->community->acpi_space_id,
1756                                           chv_pinctrl_mmio_access_handler);
1757
1758         return 0;
1759 }
1760
1761 #ifdef CONFIG_PM_SLEEP
1762 static int chv_pinctrl_suspend_noirq(struct device *dev)
1763 {
1764         struct platform_device *pdev = to_platform_device(dev);
1765         struct chv_pinctrl *pctrl = platform_get_drvdata(pdev);
1766         unsigned long flags;
1767         int i;
1768
1769         raw_spin_lock_irqsave(&chv_lock, flags);
1770
1771         pctrl->saved_intmask = readl(pctrl->regs + CHV_INTMASK);
1772
1773         for (i = 0; i < pctrl->community->npins; i++) {
1774                 const struct pinctrl_pin_desc *desc;
1775                 struct chv_pin_context *ctx;
1776                 void __iomem *reg;
1777
1778                 desc = &pctrl->community->pins[i];
1779                 if (chv_pad_locked(pctrl, desc->number))
1780                         continue;
1781
1782                 ctx = &pctrl->saved_pin_context[i];
1783
1784                 reg = chv_padreg(pctrl, desc->number, CHV_PADCTRL0);
1785                 ctx->padctrl0 = readl(reg) & ~CHV_PADCTRL0_GPIORXSTATE;
1786
1787                 reg = chv_padreg(pctrl, desc->number, CHV_PADCTRL1);
1788                 ctx->padctrl1 = readl(reg);
1789         }
1790
1791         raw_spin_unlock_irqrestore(&chv_lock, flags);
1792
1793         return 0;
1794 }
1795
1796 static int chv_pinctrl_resume_noirq(struct device *dev)
1797 {
1798         struct platform_device *pdev = to_platform_device(dev);
1799         struct chv_pinctrl *pctrl = platform_get_drvdata(pdev);
1800         unsigned long flags;
1801         int i;
1802
1803         raw_spin_lock_irqsave(&chv_lock, flags);
1804
1805         /*
1806          * Mask all interrupts before restoring per-pin configuration
1807          * registers because we don't know in which state BIOS left them
1808          * upon exiting suspend.
1809          */
1810         chv_writel(0, pctrl->regs + CHV_INTMASK);
1811
1812         for (i = 0; i < pctrl->community->npins; i++) {
1813                 const struct pinctrl_pin_desc *desc;
1814                 const struct chv_pin_context *ctx;
1815                 void __iomem *reg;
1816                 u32 val;
1817
1818                 desc = &pctrl->community->pins[i];
1819                 if (chv_pad_locked(pctrl, desc->number))
1820                         continue;
1821
1822                 ctx = &pctrl->saved_pin_context[i];
1823
1824                 /* Only restore if our saved state differs from the current */
1825                 reg = chv_padreg(pctrl, desc->number, CHV_PADCTRL0);
1826                 val = readl(reg) & ~CHV_PADCTRL0_GPIORXSTATE;
1827                 if (ctx->padctrl0 != val) {
1828                         chv_writel(ctx->padctrl0, reg);
1829                         dev_dbg(pctrl->dev, "restored pin %2u ctrl0 0x%08x\n",
1830                                 desc->number, readl(reg));
1831                 }
1832
1833                 reg = chv_padreg(pctrl, desc->number, CHV_PADCTRL1);
1834                 val = readl(reg);
1835                 if (ctx->padctrl1 != val) {
1836                         chv_writel(ctx->padctrl1, reg);
1837                         dev_dbg(pctrl->dev, "restored pin %2u ctrl1 0x%08x\n",
1838                                 desc->number, readl(reg));
1839                 }
1840         }
1841
1842         /*
1843          * Now that all pins are restored to known state, we can restore
1844          * the interrupt mask register as well.
1845          */
1846         chv_writel(0xffff, pctrl->regs + CHV_INTSTAT);
1847         chv_writel(pctrl->saved_intmask, pctrl->regs + CHV_INTMASK);
1848
1849         raw_spin_unlock_irqrestore(&chv_lock, flags);
1850
1851         return 0;
1852 }
1853 #endif
1854
1855 static const struct dev_pm_ops chv_pinctrl_pm_ops = {
1856         SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(chv_pinctrl_suspend_noirq,
1857                                       chv_pinctrl_resume_noirq)
1858 };
1859
1860 static const struct acpi_device_id chv_pinctrl_acpi_match[] = {
1861         { "INT33FF" },
1862         { }
1863 };
1864 MODULE_DEVICE_TABLE(acpi, chv_pinctrl_acpi_match);
1865
1866 static struct platform_driver chv_pinctrl_driver = {
1867         .probe = chv_pinctrl_probe,
1868         .remove = chv_pinctrl_remove,
1869         .driver = {
1870                 .name = "cherryview-pinctrl",
1871                 .pm = &chv_pinctrl_pm_ops,
1872                 .acpi_match_table = chv_pinctrl_acpi_match,
1873         },
1874 };
1875
1876 static int __init chv_pinctrl_init(void)
1877 {
1878         return platform_driver_register(&chv_pinctrl_driver);
1879 }
1880 subsys_initcall(chv_pinctrl_init);
1881
1882 static void __exit chv_pinctrl_exit(void)
1883 {
1884         platform_driver_unregister(&chv_pinctrl_driver);
1885 }
1886 module_exit(chv_pinctrl_exit);
1887
1888 MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
1889 MODULE_DESCRIPTION("Intel Cherryview/Braswell pinctrl driver");
1890 MODULE_LICENSE("GPL v2");