[PATCH v3 1/6] pinctrl: rockchip: add suspend/resume functions

[zyw at rock-chips.com]

From: Chris <zyw at rock-chips.com>

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

Signed-off-by: Chris <zyw at rock-chips.com>
Signed-off-by: Chris Zhong <zyw at rock-chips.com>
---

Changes in v3: None
Changes in v2: None

 drivers/pinctrl/pinctrl-rockchip.c |   29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c
index d0f3c18..d384d99 100644
--- a/drivers/pinctrl/pinctrl-rockchip.c
+++ b/drivers/pinctrl/pinctrl-rockchip.c
@@ -1795,6 +1795,31 @@ static struct rockchip_pin_ctrl *rockchip_pinctrl_get_soc_data(
 	return ctrl;
 }
 
+#ifdef CONFIG_PM
+static int rockchip_pinctrl_suspend(struct platform_device *pdev,
+				    pm_message_t state)
+{
+	struct rockchip_pinctrl *info;
+
+	info = platform_get_drvdata(pdev);
+	if (!info)
+		return -EINVAL;
+
+	return pinctrl_force_sleep(info->pctl_dev);
+}
+
+static int rockchip_pinctrl_resume(struct platform_device *pdev)
+{
+	struct rockchip_pinctrl *info;
+
+	info = platform_get_drvdata(pdev);
+	if (!info)
+		return -EINVAL;
+
+	return pinctrl_force_default(info->pctl_dev);
+}
+#endif
+
 static int rockchip_pinctrl_probe(struct platform_device *pdev)
 {
 	struct rockchip_pinctrl *info;
@@ -2010,6 +2035,10 @@ static struct platform_driver rockchip_pinctrl_driver = {
 		.owner	= THIS_MODULE,
 		.of_match_table = rockchip_pinctrl_dt_match,
 	},
+	#ifdef CONFIG_PM
+	.suspend = rockchip_pinctrl_suspend,
+	.resume = rockchip_pinctrl_resume,
+	#endif
 };
 
 static int __init rockchip_pinctrl_drv_register(void)
-- 
1.7.9.5