Commit 26d1f438 authored by Dong Aisheng's avatar Dong Aisheng Committed by Linus Walleij
Browse files

pinctrl: pinctrl-imx7ulp: add gpio_set_direction support 



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: default avatarShawn Guo <shawnguo@kernel.org>
Signed-off-by: default avatarDong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 3be6f651

drivers/pinctrl/freescale/pinctrl-imx7ulp.c

+26 −0
Original line number Diff line number Diff line
@@ -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,