pinctrl: rockchip: add suspend/resume functions

support suspend/resume of pinctrl, it allows handling sleep mode
for hogged pins in pinctrl

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>

diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c
index 59a54617bf757f969632b80a7e33fcacb79a9bed..28b12187c2c18537d9df2c7ba6ad290b972b0aaf 100644 (file)
--- a/drivers/pinctrl/pinctrl-rockchip.c
+++ b/drivers/pinctrl/pinctrl-rockchip.c
@@ -1796,6 +1796,23 @@ static struct rockchip_pin_ctrl *rockchip_pinctrl_get_soc_data(
        return ctrl;
 }
 
+static int __maybe_unused rockchip_pinctrl_suspend(struct device *dev)
+{
+       struct rockchip_pinctrl *info = dev_get_drvdata(dev);
+
+       return pinctrl_force_sleep(info->pctl_dev);
+}
+
+static int __maybe_unused rockchip_pinctrl_resume(struct device *dev)
+{
+       struct rockchip_pinctrl *info = dev_get_drvdata(dev);
+
+       return pinctrl_force_default(info->pctl_dev);
+}
+
+static SIMPLE_DEV_PM_OPS(rockchip_pinctrl_dev_pm_ops, rockchip_pinctrl_suspend,
+                        rockchip_pinctrl_resume);
+
 static int rockchip_pinctrl_probe(struct platform_device *pdev)
 {
        struct rockchip_pinctrl *info;
@@ -2009,6 +2026,7 @@ static struct platform_driver rockchip_pinctrl_driver = {
        .driver = {
                .name   = "rockchip-pinctrl",
                .owner  = THIS_MODULE,
+               .pm = &rockchip_pinctrl_dev_pm_ops,
                .of_match_table = rockchip_pinctrl_dt_match,
        },
 };