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>

diff --git a/drivers/pinctrl/pinctrl-single.c b/drivers/pinctrl/pinctrl-single.c
index 2899c866a3fbe9f7f5fb3f07421a01410d1d44c6..6866548fab31669d5141a7c8af21c10e0caa895d 100644 (file)
--- 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);