diff options
| author | Chris Zhong <zyw@rock-chips.com> | 2014-10-29 12:52:00 +0100 |
|---|---|---|
| committer | Heiko Stuebner <heiko@sntech.de> | 2014-10-31 23:50:39 +0100 |
| commit | 8dca9331270240125fedbe83e0a2cd5750ed9fff (patch) | |
| tree | 351922c2328f4ba2fee37ebe20d05ecb62258939 /drivers/pinctrl | |
| parent | pinctrl: rockchip: add suspend/resume functions (diff) | |
| download | linux-8dca9331270240125fedbe83e0a2cd5750ed9fff.tar.xz linux-8dca9331270240125fedbe83e0a2cd5750ed9fff.zip | |
pinctrl: rockchip: save and restore gpio6_c6 pinmux in suspend/resume
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 <zyw@rock-chips.com>
Tested-by: Doug Anderson <dianders@chromium.org>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Diffstat (limited to 'drivers/pinctrl')
| -rw-r--r-- | drivers/pinctrl/pinctrl-rockchip.c | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c index 28b12187c2c1..40970c305dd0 100644 --- a/drivers/pinctrl/pinctrl-rockchip.c +++ b/drivers/pinctrl/pinctrl-rockchip.c @@ -1796,16 +1796,44 @@ static struct rockchip_pin_ctrl *rockchip_pinctrl_get_soc_data( return ctrl; } +#define RK3288_GRF_GPIO6C_IOMUX 0x64 +#define GPIO6C6_SEL_WRITE_ENABLE BIT(28) + +static u32 rk3288_grf_gpio6c_iomux; + static int __maybe_unused rockchip_pinctrl_suspend(struct device *dev) { struct rockchip_pinctrl *info = dev_get_drvdata(dev); + int 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) { + pinctrl_force_default(info->pctl_dev); + return ret; + } + } - return pinctrl_force_sleep(info->pctl_dev); + return 0; } static int __maybe_unused rockchip_pinctrl_resume(struct device *dev) { struct rockchip_pinctrl *info = dev_get_drvdata(dev); + int 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); } |