From: Chris Zhong <[email protected]> Save and restore the gpio6_c6 pinmux setting, since Maskrom of RK3288 would modify it to sdmmc0_det, so it need to be restored to the correct setting after resume from Maskrom.
Signed-off-by: Chris Zhong <[email protected]> --- Changes in v3: None Changes in v2: None drivers/pinctrl/pinctrl-rockchip.c | 30 +++++++++++++++++++++++++++++- 1 file changed, 29 insertions(+), 1 deletion(-) diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c index d384d99..85134e4 100644 --- a/drivers/pinctrl/pinctrl-rockchip.c +++ b/drivers/pinctrl/pinctrl-rockchip.c @@ -1796,26 +1796,54 @@ static struct rockchip_pin_ctrl *rockchip_pinctrl_get_soc_data( } #ifdef CONFIG_PM + +#define RK3288_GRF_GPIO6C_IOMUX 0x64 +#define GPIO6C6_SEL_WRITE_ENABLE BIT(28) + +static u32 rk3288_grf_gpio6c_iomux; + static int rockchip_pinctrl_suspend(struct platform_device *pdev, pm_message_t state) { struct rockchip_pinctrl *info; + int ret; info = platform_get_drvdata(pdev); if (!info) return -EINVAL; - return pinctrl_force_sleep(info->pctl_dev); + ret = pinctrl_force_sleep(info->pctl_dev); + if (ret) + return ret; + + /* + * RK3288 GPIO6_C6 mux would be modified by Maskrom when resume, so save + * the setting here, and restore it at resume. + */ + if (info->ctrl->type == RK3288) { + ret = regmap_read(info->regmap_base, RK3288_GRF_GPIO6C_IOMUX, + &rk3288_grf_gpio6c_iomux); + if (ret) + return ret; + } + + return 0; } static int rockchip_pinctrl_resume(struct platform_device *pdev) { struct rockchip_pinctrl *info; + int ret; info = platform_get_drvdata(pdev); if (!info) return -EINVAL; + ret = regmap_write(info->regmap_base, RK3288_GRF_GPIO6C_IOMUX, + rk3288_grf_gpio6c_iomux | GPIO6C6_SEL_WRITE_ENABLE); + if (ret) + return ret; + return pinctrl_force_default(info->pctl_dev); } #endif -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
