pinctrl: rockchip: Add rk3328 pinctrl support

Note, the iomux of following pins are special, need to
be recalculated specially.
 - gpio2_b4
 - gpio2_b7
 - gpio2_c7

Signed-off-by: David Wu <david.wu@rock-chips.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/Documentation/devicetree/bindings/pinctrl/rockchip,pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/rockchip,pinctrl.txt
index 4722bc6..403b5a2 100644 (file)
--- a/Documentation/devicetree/bindings/pinctrl/rockchip,pinctrl.txt
+++ b/Documentation/devicetree/bindings/pinctrl/rockchip,pinctrl.txt
@@ -22,8 +22,8 @@ Required properties for iomux controller:
   - compatible: one of "rockchip,rk1108-pinctrl", "rockchip,rk2928-pinctrl"
                       "rockchip,rk3066a-pinctrl", "rockchip,rk3066b-pinctrl"
                       "rockchip,rk3188-pinctrl", "rockchip,rk3228-pinctrl"
-                      "rockchip,rk3288-pinctrl", "rockchip,rk3368-pinctrl"
-                      "rockchip,rk3399-pinctrl"
+                      "rockchip,rk3288-pinctrl", "rockchip,rk3328-pinctrl"
+                      "rockchip,rk3368-pinctrl", "rockchip,rk3399-pinctrl"
   - rockchip,grf: phandle referencing a syscon providing the
         "general register files"
 

diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c
index 2b95133..a838c8b 100644 (file)
--- a/drivers/pinctrl/pinctrl-rockchip.c
+++ b/drivers/pinctrl/pinctrl-rockchip.c
@@ -534,6 +534,49 @@ static const struct pinctrl_ops rockchip_pctrl_ops = {
  * Hardware access
  */
 
+static const struct rockchip_mux_recalced_data rk3328_mux_recalced_data[] = {
+       {
+               .num = 2,
+               .pin = 12,
+               .reg = 0x24,
+               .bit = 8,
+               .mask = 0x3
+       }, {
+               .num = 2,
+               .pin = 15,
+               .reg = 0x28,
+               .bit = 0,
+               .mask = 0x7
+       }, {
+               .num = 2,
+               .pin = 23,
+               .reg = 0x30,
+               .bit = 14,
+               .mask = 0x3
+       },
+};
+
+static void rk3328_recalc_mux(u8 bank_num, int pin, int *reg,
+                             u8 *bit, int *mask)
+{
+       const struct rockchip_mux_recalced_data *data = NULL;
+       int i;
+
+       for (i = 0; i < ARRAY_SIZE(rk3328_mux_recalced_data); i++)
+               if (rk3328_mux_recalced_data[i].num == bank_num &&
+                   rk3328_mux_recalced_data[i].pin == pin) {
+                       data = &rk3328_mux_recalced_data[i];
+                       break;
+               }
+
+       if (!data)
+               return;
+
+       *reg = data->reg;
+       *mask = data->mask;
+       *bit = data->bit;
+}
+
 static int rockchip_get_mux(struct rockchip_pin_bank *bank, int pin)
 {
        struct rockchip_pinctrl *info = bank->drvdata;
@@ -2722,6 +2765,31 @@ static struct rockchip_pin_ctrl rk3288_pin_ctrl = {
                .drv_calc_reg           = rk3288_calc_drv_reg_and_bit,
 };
 
+static struct rockchip_pin_bank rk3328_pin_banks[] = {
+       PIN_BANK_IOMUX_FLAGS(0, 32, "gpio0", 0, 0, 0, 0),
+       PIN_BANK_IOMUX_FLAGS(1, 32, "gpio1", 0, 0, 0, 0),
+       PIN_BANK_IOMUX_FLAGS(2, 32, "gpio2", 0,
+                            IOMUX_WIDTH_3BIT | IOMUX_RECALCED,
+                            IOMUX_WIDTH_3BIT | IOMUX_RECALCED,
+                            0),
+       PIN_BANK_IOMUX_FLAGS(3, 32, "gpio3",
+                            IOMUX_WIDTH_3BIT,
+                            IOMUX_WIDTH_3BIT | IOMUX_RECALCED,
+                            0,
+                            0),
+};
+
+static struct rockchip_pin_ctrl rk3328_pin_ctrl = {
+               .pin_banks              = rk3328_pin_banks,
+               .nr_banks               = ARRAY_SIZE(rk3328_pin_banks),
+               .label                  = "RK3328-GPIO",
+               .type                   = RK3288,
+               .grf_mux_offset         = 0x0,
+               .pull_calc_reg          = rk3228_calc_pull_reg_and_bit,
+               .drv_calc_reg           = rk3228_calc_drv_reg_and_bit,
+               .iomux_recalc           = rk3328_recalc_mux,
+};
+
 static struct rockchip_pin_bank rk3368_pin_banks[] = {
        PIN_BANK_IOMUX_FLAGS(0, 32, "gpio0", IOMUX_SOURCE_PMU,
                                             IOMUX_SOURCE_PMU,
@@ -2827,6 +2895,8 @@ static const struct of_device_id rockchip_pinctrl_dt_match[] = {
                .data = (void *)&rk3228_pin_ctrl },
        { .compatible = "rockchip,rk3288-pinctrl",
                .data = (void *)&rk3288_pin_ctrl },
+       { .compatible = "rockchip,rk3328-pinctrl",
+               .data = (void *)&rk3328_pin_ctrl },
        { .compatible = "rockchip,rk3368-pinctrl",
                .data = (void *)&rk3368_pin_ctrl },
        { .compatible = "rockchip,rk3399-pinctrl",