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pinctrl: pinctrl-imx7ulp: add gpio_set_direction support

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Add gpio_set_direction support. This makes the driver support
GPIO input/output dynamically change from userspace.

Cc: Alexandre Courbot <gnurou@gmail.com>
Cc: Stefan Agner <stefan@agner.ch>
Cc: Fugang Duan <fugang.duan@nxp.com>
Cc: Bai Ping <ping.bai@nxp.com>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Dong Aisheng 2017-07-25 21:41:56 +08:00 committed by Linus Walleij
parent 3be6f65102
commit 26d1f43822
1 changed files with 26 additions and 0 deletions
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26
drivers/pinctrl/freescale/pinctrl-imx7ulp.c
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@ -259,6 +259,8 @@ static const struct pinctrl_pin_desc imx7ulp_pinctrl_pads[] = {
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF19),
};
#define BM_OBE_ENABLED BIT(17)
#define BM_IBE_ENABLED BIT(16)
#define BM_LK_ENABLED BIT(15)
#define BM_MUX_MODE 0xf00
#define BP_MUX_MODE 8
@ -300,10 +302,34 @@ static void imx7ulp_cfg_params_fixup(unsigned long *configs,
}
}
static int imx7ulp_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range,
unsigned offset, bool input)
{
struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
struct imx_pinctrl_soc_info *info = ipctl->info;
const struct imx_pin_reg *pin_reg;
u32 reg;
pin_reg = &info->pin_regs[offset];
if (pin_reg->mux_reg == -1)
return -EINVAL;
reg = readl(ipctl->base + pin_reg->mux_reg);
if (input)
reg = (reg & ~BM_OBE_ENABLED) | BM_IBE_ENABLED;
else
reg = (reg & ~BM_IBE_ENABLED) | BM_OBE_ENABLED;
writel(reg, ipctl->base + pin_reg->mux_reg);
return 0;
}
static struct imx_pinctrl_soc_info imx7ulp_pinctrl_info = {
.pins = imx7ulp_pinctrl_pads,
.npins = ARRAY_SIZE(imx7ulp_pinctrl_pads),
.flags = ZERO_OFFSET_VALID | SHARE_MUX_CONF_REG,
.gpio_set_direction = imx7ulp_pmx_gpio_set_direction,
.mux_mask = BM_MUX_MODE,
.mux_shift = BP_MUX_MODE,
.generic_pinconf = true,