regulator: fan53555: Add TCS4525 DCDC support

TCS4525 main features:

- 2.7V to 5.5V Input Voltage Range;
- 3MHz Constant Switching Frequency;
- 5A Available Load Current;
- Programmable Output Voltage: 0.6V to 1.4V in 6.25mV Steps;
- PFM/PWM Operation for Optimum Increased Efficiency;

Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
[Ezequiel: Forward port]
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Link: https://lore.kernel.org/r/20210421210338.43819-3-ezequiel@collabora.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/regulator/fan53555.c b/drivers/regulator/fan53555.c
index aa42618..f3918f0 100644 (file)
--- a/drivers/regulator/fan53555.c
+++ b/drivers/regulator/fan53555.c
@@ -24,6 +24,12 @@
 /* Voltage setting */
 #define FAN53555_VSEL0         0x00
 #define FAN53555_VSEL1         0x01
+
+#define TCS4525_VSEL0          0x11
+#define TCS4525_VSEL1          0x10
+#define TCS4525_TIME           0x13
+#define TCS4525_COMMAND                0x14
+
 /* Control register */
 #define FAN53555_CONTROL       0x02
 /* IC Type */
@@ -49,11 +55,20 @@
 
 #define FAN53555_NVOLTAGES     64      /* Numbers of voltages */
 #define FAN53526_NVOLTAGES     128
+#define TCS4525_NVOLTAGES      127     /* Numbers of voltages */
+
+#define TCS_VSEL_NSEL_MASK     0x7f
+#define TCS_VSEL0_MODE         (1 << 7)
+#define TCS_VSEL1_MODE         (1 << 6)
+
+#define TCS_SLEW_SHIFT         3
+#define TCS_SLEW_MASK          (0x3 < 3)
 
 enum fan53555_vendor {
        FAN53526_VENDOR_FAIRCHILD = 0,
        FAN53555_VENDOR_FAIRCHILD,
        FAN53555_VENDOR_SILERGY,
+       FAN53555_VENDOR_TCS,
 };
 
 enum {
@@ -106,6 +121,11 @@ struct fan53555_device_info {
        unsigned int mode_mask;
        /* Sleep voltage cache */
        unsigned int sleep_vol_cache;
+       /* Slew rate */
+       unsigned int slew_reg;
+       unsigned int slew_mask;
+       unsigned int slew_shift;
+       unsigned int slew_rate;
 };
 
 static int fan53555_set_suspend_voltage(struct regulator_dev *rdev, int uV)
@@ -189,13 +209,37 @@ static const int slew_rates[] = {
          500,
 };
 
+static const int tcs_slew_rates[] = {
+       18700,
+        9300,
+        4600,
+        2300,
+};
+
 static int fan53555_set_ramp(struct regulator_dev *rdev, int ramp)
 {
        struct fan53555_device_info *di = rdev_get_drvdata(rdev);
        int regval = -1, i;
+       const int *slew_rate_t;
+       int slew_rate_n;
 
-       for (i = 0; i < ARRAY_SIZE(slew_rates); i++) {
-               if (ramp <= slew_rates[i])
+       switch (di->vendor) {
+       case FAN53526_VENDOR_FAIRCHILD:
+       case FAN53555_VENDOR_FAIRCHILD:
+       case FAN53555_VENDOR_SILERGY:
+               slew_rate_t = slew_rates;
+               slew_rate_n = ARRAY_SIZE(slew_rates);
+               break;
+       case FAN53555_VENDOR_TCS:
+               slew_rate_t = tcs_slew_rates;
+               slew_rate_n = ARRAY_SIZE(tcs_slew_rates);
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       for (i = 0; i < slew_rate_n; i++) {
+               if (ramp <= slew_rate_t[i])
                        regval = i;
                else
                        break;
@@ -206,8 +250,8 @@ static int fan53555_set_ramp(struct regulator_dev *rdev, int ramp)
                return -EINVAL;
        }
 
-       return regmap_update_bits(rdev->regmap, FAN53555_CONTROL,
-                                 CTL_SLEW_MASK, regval << CTL_SLEW_SHIFT);
+       return regmap_update_bits(rdev->regmap, di->slew_reg,
+                                 di->slew_mask, regval << di->slew_shift);
 }
 
 static const struct regulator_ops fan53555_regulator_ops = {
@@ -292,7 +336,9 @@ static int fan53555_voltages_setup_fairchild(struct fan53555_device_info *di)
                        "Chip ID %d not supported!\n", di->chip_id);
                return -EINVAL;
        }
-
+       di->slew_reg = FAN53555_CONTROL;
+       di->slew_mask = CTL_SLEW_MASK;
+       di->slew_shift = CTL_SLEW_SHIFT;
        di->vsel_count = FAN53555_NVOLTAGES;
 
        return 0;
@@ -312,12 +358,29 @@ static int fan53555_voltages_setup_silergy(struct fan53555_device_info *di)
                        "Chip ID %d not supported!\n", di->chip_id);
                return -EINVAL;
        }
-
+       di->slew_reg = FAN53555_CONTROL;
+       di->slew_reg = FAN53555_CONTROL;
+       di->slew_mask = CTL_SLEW_MASK;
+       di->slew_shift = CTL_SLEW_SHIFT;
        di->vsel_count = FAN53555_NVOLTAGES;
 
        return 0;
 }
 
+static int fan53555_voltages_setup_tcs(struct fan53555_device_info *di)
+{
+       di->slew_reg = TCS4525_TIME;
+       di->slew_mask = TCS_SLEW_MASK;
+       di->slew_shift = TCS_SLEW_MASK;
+
+       /* Init voltage range and step */
+       di->vsel_min = 600000;
+       di->vsel_step = 6250;
+       di->vsel_count = TCS4525_NVOLTAGES;
+
+       return 0;
+}
+
 /* For 00,01,03,05 options:
  * VOUT = 0.60V + NSELx * 10mV, from 0.60 to 1.23V.
  * For 04 option:
@@ -329,17 +392,41 @@ static int fan53555_device_setup(struct fan53555_device_info *di,
        int ret = 0;
 
        /* Setup voltage control register */
-       switch (pdata->sleep_vsel_id) {
-       case FAN53555_VSEL_ID_0:
-               di->sleep_reg = FAN53555_VSEL0;
-               di->vol_reg = FAN53555_VSEL1;
+       switch (di->vendor) {
+       case FAN53526_VENDOR_FAIRCHILD:
+       case FAN53555_VENDOR_FAIRCHILD:
+       case FAN53555_VENDOR_SILERGY:
+               switch (pdata->sleep_vsel_id) {
+               case FAN53555_VSEL_ID_0:
+                       di->sleep_reg = FAN53555_VSEL0;
+                       di->vol_reg = FAN53555_VSEL1;
+                       break;
+               case FAN53555_VSEL_ID_1:
+                       di->sleep_reg = FAN53555_VSEL1;
+                       di->vol_reg = FAN53555_VSEL0;
+                       break;
+               default:
+                       dev_err(di->dev, "Invalid VSEL ID!\n");
+                       return -EINVAL;
+               }
                break;
-       case FAN53555_VSEL_ID_1:
-               di->sleep_reg = FAN53555_VSEL1;
-               di->vol_reg = FAN53555_VSEL0;
+       case FAN53555_VENDOR_TCS:
+               switch (pdata->sleep_vsel_id) {
+               case FAN53555_VSEL_ID_0:
+                       di->sleep_reg = TCS4525_VSEL0;
+                       di->vol_reg = TCS4525_VSEL1;
+                       break;
+               case FAN53555_VSEL_ID_1:
+                       di->sleep_reg = TCS4525_VSEL1;
+                       di->vol_reg = TCS4525_VSEL0;
+                       break;
+               default:
+                       dev_err(di->dev, "Invalid VSEL ID!\n");
+                       return -EINVAL;
+               }
                break;
        default:
-               dev_err(di->dev, "Invalid VSEL ID!\n");
+               dev_err(di->dev, "vendor %d not supported!\n", di->vendor);
                return -EINVAL;
        }
 
@@ -362,6 +449,18 @@ static int fan53555_device_setup(struct fan53555_device_info *di,
                di->mode_reg = di->vol_reg;
                di->mode_mask = VSEL_MODE;
                break;
+       case FAN53555_VENDOR_TCS:
+               di->mode_reg = TCS4525_COMMAND;
+
+               switch (pdata->sleep_vsel_id) {
+               case FAN53555_VSEL_ID_0:
+                       di->mode_mask = TCS_VSEL1_MODE;
+                       break;
+               case FAN53555_VSEL_ID_1:
+                       di->mode_mask = TCS_VSEL0_MODE;
+                       break;
+               }
+               break;
        default:
                dev_err(di->dev, "vendor %d not supported!\n", di->vendor);
                return -EINVAL;
@@ -378,6 +477,9 @@ static int fan53555_device_setup(struct fan53555_device_info *di,
        case FAN53555_VENDOR_SILERGY:
                ret = fan53555_voltages_setup_silergy(di);
                break;
+       case FAN53555_VENDOR_TCS:
+               ret = fan53555_voltages_setup_tcs(di);
+               break;
        default:
                dev_err(di->dev, "vendor %d not supported!\n", di->vendor);
                return -EINVAL;
@@ -449,6 +551,9 @@ static const struct of_device_id __maybe_unused fan53555_dt_ids[] = {
        }, {
                .compatible = "silergy,syr828",
                .data = (void *)FAN53555_VENDOR_SILERGY,
+       }, {
+               .compatible = "tcs,tcs4525",
+               .data = (void *)FAN53555_VENDOR_TCS
        },
        { }
 };
@@ -554,6 +659,9 @@ static const struct i2c_device_id fan53555_id[] = {
        }, {
                .name = "syr828",
                .driver_data = FAN53555_VENDOR_SILERGY
+       }, {
+               .name = "tcs4525",
+               .driver_data = FAN53555_VENDOR_TCS
        },
        { },
 };