pinctrl: single: adopt pinctrl sleep mode management

Make pinctrl-single able to handle suspend/resume events and change
hogged pins states accordingly.

Signed-off-by: Hebbar Gururaja <gururaja.hebbar@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 27 insertions, 0 deletions

diff --git a/drivers/pinctrl/pinctrl-single.c b/drivers/pinctrl/pinctrl-single.c
index 2899c866a3fb..6866548fab31 100644
--- a/drivers/pinctrl/pinctrl-single.c
+++ b/drivers/pinctrl/pinctrl-single.c
@@ -1483,6 +1483,29 @@ static int pcs_add_gpio_func(struct device_node *node, struct pcs_device *pcs)
         return ret;
 }
 
+static int pinctrl_single_suspend(struct platform_device *pdev,
+                                        pm_message_t state)
+{
+        struct pcs_device *pcs;
+
+        pcs = platform_get_drvdata(pdev);
+        if (!pcs)
+                return -EINVAL;
+
+        return pinctrl_force_sleep(pcs->pctl);
+}
+
+static int pinctrl_single_resume(struct platform_device *pdev)
+{
+        struct pcs_device *pcs;
+
+        pcs = platform_get_drvdata(pdev);
+        if (!pcs)
+                return -EINVAL;
+
+        return pinctrl_force_default(pcs->pctl);
+}
+
 static int pcs_probe(struct platform_device *pdev)
 {
         struct device_node *np = pdev->dev.of_node;
@@ -1631,6 +1654,10 @@ static struct platform_driver pcs_driver = {
                 .name           = DRIVER_NAME,
                 .of_match_table = pcs_of_match,
         },
+#ifdef CONFIG_PM
+        .suspend = pinctrl_single_suspend,
+        .resume = pinctrl_single_resume,
+#endif
 };
 
 module_platform_driver(pcs_driver);