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 a24448e5d3996ee81a490710545626be8c83f0a2..52c342577f40927a75f47c80ea4f8bd82d09eabe 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>
@@ -628,3 +628,25 @@ 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 db408b0570002af667a8e7a6875a4f344703fa87..63aff36687883167d875c638289f1516871e0c1f 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>
@@ -98,4 +98,8 @@ 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 f21b7389df3c2771127e381030151d124782de36..bc5c19cb711343abb5de839e5ef65b095af43625 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)