ENGR00283508-5 pinctrl: imx: support pin sleep mode in suspend

When system suspend, need to switch pwm pin to sleep mode,
this is to save IO power. Using pinctrl mode switch framework
to make it happen.

Signed-off-by: Anson Huang <b20788@freescale.com>

diff --git a/drivers/pinctrl/pinctrl-imx.c b/drivers/pinctrl/pinctrl-imx.c
index 7284b8678eadd004eee1ea1b18eb1df9cafe9c7e..6cae657d2a7427216606f855203a3f06d69d6b45 100644 (file)
--- a/drivers/pinctrl/pinctrl-imx.c
+++ b/drivers/pinctrl/pinctrl-imx.c
@@ -1,7 +1,7 @@
 /*
  * Core driver for the imx pin controller
  *
- * Copyright (C) 2012 Freescale Semiconductor, Inc.
+ * Copyright (C) 2012-2013 Freescale Semiconductor, Inc.
  * Copyright (C) 2012 Linaro Ltd.
  *
  * Author: Dong Aisheng <dong.aisheng@linaro.org>
@@ -649,3 +649,25 @@ int imx_pinctrl_remove(struct platform_device *pdev)
 
        return 0;
 }
+
+#ifdef CONFIG_PM
+int imx_pinctrl_suspend(struct platform_device *pdev, pm_message_t state)
+{
+       struct imx_pinctrl *ipctl = platform_get_drvdata(pdev);
+
+       if (!ipctl)
+               return -EINVAL;
+
+       return pinctrl_force_sleep(ipctl->pctl);
+}
+
+int imx_pinctrl_resume(struct platform_device *pdev)
+{
+       struct imx_pinctrl *ipctl = platform_get_drvdata(pdev);
+
+       if (!ipctl)
+               return -EINVAL;
+
+       return pinctrl_force_default(ipctl->pctl);
+}
+#endif

diff --git a/drivers/pinctrl/pinctrl-imx.h b/drivers/pinctrl/pinctrl-imx.h
index bcedd991c9f344371ef80d1f8517e9353706e413..e18c94deccf57f79e6b2710275b1d84172eeb004 100644 (file)
--- a/drivers/pinctrl/pinctrl-imx.h
+++ b/drivers/pinctrl/pinctrl-imx.h
@@ -1,7 +1,7 @@
 /*
  * IMX pinmux core definitions
  *
- * Copyright (C) 2012 Freescale Semiconductor, Inc.
+ * Copyright (C) 2012-2013 Freescale Semiconductor, Inc.
  * Copyright (C) 2012 Linaro Ltd.
  *
  * Author: Dong Aisheng <dong.aisheng@linaro.org>
@@ -92,4 +92,8 @@ struct imx_pinctrl_soc_info {
 int imx_pinctrl_probe(struct platform_device *pdev,
                        struct imx_pinctrl_soc_info *info);
 int imx_pinctrl_remove(struct platform_device *pdev);
+#ifdef CONFIG_PM
+int imx_pinctrl_suspend(struct platform_device *pdev, pm_message_t state);
+int imx_pinctrl_resume(struct platform_device *pdev);
+#endif
 #endif /* __DRIVERS_PINCTRL_IMX_H */

diff --git a/drivers/pinctrl/pinctrl-imx6sl.c b/drivers/pinctrl/pinctrl-imx6sl.c
index 4eb7ccab5f2d1806f17012da9b38b9467db472c7..f8613d53beab332a009fa5bb1b0f6ae1f0e5ac52 100644 (file)
--- a/drivers/pinctrl/pinctrl-imx6sl.c
+++ b/drivers/pinctrl/pinctrl-imx6sl.c
@@ -384,6 +384,10 @@ static struct platform_driver imx6sl_pinctrl_driver = {
        },
        .probe = imx6sl_pinctrl_probe,
        .remove = imx_pinctrl_remove,
+#ifdef CONFIG_PM
+       .suspend = imx_pinctrl_suspend,
+       .resume = imx_pinctrl_resume,
+#endif
 };
 
 static int __init imx6sl_pinctrl_init(void)