iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

pinctrl: rockchip: add input schmitt support for rv1108

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

Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Andy Yan 2017-07-31 18:10:22 +08:00 committed by Linus Walleij
parent 29ddbb8101
commit 5caff7eabc
1 changed files with 31 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
drivers/pinctrl/pinctrl-rockchip.c
View File

@ -1172,6 +1172,36 @@ static void rv1108_calc_drv_reg_and_bit(struct rockchip_pin_bank *bank,
*bit *= RV1108_DRV_BITS_PER_PIN; *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_OFFSET 0x118
#define RK2928_PULL_PINS_PER_REG 16 #define RK2928_PULL_PINS_PER_REG 16
#define RK2928_PULL_BANK_STRIDE 8 #define RK2928_PULL_BANK_STRIDE 8
@ -3134,6 +3164,7 @@ static struct rockchip_pin_ctrl rv1108_pin_ctrl = {
.pmu_mux_offset = 0x0, .pmu_mux_offset = 0x0,
.pull_calc_reg = rv1108_calc_pull_reg_and_bit, .pull_calc_reg = rv1108_calc_pull_reg_and_bit,
.drv_calc_reg = rv1108_calc_drv_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[] = { static struct rockchip_pin_bank rk2928_pin_banks[] = {