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authordavid.wu <david.wu@rock-chips.com>2017-03-02 15:11:24 +0800
committerLinus Walleij <linus.walleij@linaro.org>2017-03-14 14:42:26 +0100
commit728d3f5afd991a44b4ec9d019d8556d8cb68db3f (patch)
tree6b7a964473c15b7125719a43b0d0085e62b0a7a6 /drivers/pinctrl/pinctrl-rockchip.c
parente3b357d7dfe6b38a6064562bacf5c912b3443ac0 (diff)
pinctrl: rockchip: Add input schmitt support for rk3328
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>
Diffstat (limited to 'drivers/pinctrl/pinctrl-rockchip.c')
-rw-r--r--drivers/pinctrl/pinctrl-rockchip.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c
index 3723fd43e463..1e276dfe1763 100644
--- a/drivers/pinctrl/pinctrl-rockchip.c
+++ b/drivers/pinctrl/pinctrl-rockchip.c
@@ -1358,6 +1358,28 @@ static int rockchip_set_pull(struct rockchip_pin_bank *bank,
return ret;
}
+#define RK3328_SCHMITT_BITS_PER_PIN 1
+#define RK3328_SCHMITT_PINS_PER_REG 16
+#define RK3328_SCHMITT_BANK_STRIDE 8
+#define RK3328_SCHMITT_GRF_OFFSET 0x380
+
+static int rk3328_calc_schmitt_reg_and_bit(struct rockchip_pin_bank *bank,
+ int pin_num,
+ struct regmap **regmap,
+ int *reg, u8 *bit)
+{
+ struct rockchip_pinctrl *info = bank->drvdata;
+
+ *regmap = info->regmap_base;
+ *reg = RK3328_SCHMITT_GRF_OFFSET;
+
+ *reg += bank->bank_num * RK3328_SCHMITT_BANK_STRIDE;
+ *reg += ((pin_num / RK3328_SCHMITT_PINS_PER_REG) * 4);
+ *bit = pin_num % RK3328_SCHMITT_PINS_PER_REG;
+
+ return 0;
+}
+
static int rockchip_get_schmitt(struct rockchip_pin_bank *bank, int pin_num)
{
struct rockchip_pinctrl *info = bank->drvdata;
@@ -2861,6 +2883,7 @@ static struct rockchip_pin_ctrl rk3328_pin_ctrl = {
.pull_calc_reg = rk3228_calc_pull_reg_and_bit,
.drv_calc_reg = rk3228_calc_drv_reg_and_bit,
.iomux_recalc = rk3328_recalc_mux,
+ .schmitt_calc_reg = rk3328_calc_schmitt_reg_and_bit,
};
static struct rockchip_pin_bank rk3368_pin_banks[] = {