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Commit 5caff7ea authored by Andy Yan's avatar Andy Yan Committed by Linus Walleij
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pinctrl: rockchip: add input schmitt support for rv1108 



Some pins like i2c SCL/SDA need the schmitt input function
to avoid crosstalk problems.

Signed-off-by: default avatarAndy Yan <andy.yan@rock-chips.com>
Reviewed-by: default avatarHeiko Stuebner <heiko@sntech.de>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 29ddbb81

drivers/pinctrl/pinctrl-rockchip.c

+31 −0
Original line number Diff line number Diff line
@@ -1172,6 +1172,36 @@ static void rv1108_calc_drv_reg_and_bit(struct rockchip_pin_bank *bank, 
	*bit *= RV1108_DRV_BITS_PER_PIN;

}



#define RV1108_SCHMITT_PMU_OFFSET		0x30

#define RV1108_SCHMITT_GRF_OFFSET		0x388

#define RV1108_SCHMITT_BANK_STRIDE		8

#define RV1108_SCHMITT_PINS_PER_GRF_REG		16

#define RV1108_SCHMITT_PINS_PER_PMU_REG		8



static int rv1108_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;

	int pins_per_reg;



	if (bank->bank_num == 0) {

		*regmap = info->regmap_pmu;

		*reg = RV1108_SCHMITT_PMU_OFFSET;

		pins_per_reg = RV1108_SCHMITT_PINS_PER_PMU_REG;

	} else {

		*regmap = info->regmap_base;

		*reg = RV1108_SCHMITT_GRF_OFFSET;

		pins_per_reg = RV1108_SCHMITT_PINS_PER_GRF_REG;

		*reg += (bank->bank_num  - 1) * RV1108_SCHMITT_BANK_STRIDE;

	}

	*reg += ((pin_num / pins_per_reg) * 4);

	*bit = pin_num % pins_per_reg;



	return 0;

}



#define RK2928_PULL_OFFSET		0x118

#define RK2928_PULL_PINS_PER_REG	16

#define RK2928_PULL_BANK_STRIDE		8
@@ -3134,6 +3164,7 @@ static struct rockchip_pin_ctrl rv1108_pin_ctrl = { 
	.pmu_mux_offset		= 0x0,

	.pull_calc_reg		= rv1108_calc_pull_reg_and_bit,

	.drv_calc_reg		= rv1108_calc_drv_reg_and_bit,

	.schmitt_calc_reg	= rv1108_calc_schmitt_reg_and_bit,

};



static struct rockchip_pin_bank rk2928_pin_banks[] = {