MLK-11456-01 tty: serial: imx: add pinctrl sleep mode support

For LPSR mode, UART iomux settings will be lost after resume,
so add pinctrl sleep mode support.

Signed-off-by: Anson Huang <b20788@freescale.com>
Signed-off-by: Fugang Duan <B38611@freescale.com>

diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 936240b..ef87d93 100644 (file)
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -2274,6 +2274,8 @@ static int imx_serial_port_suspend_noirq(struct device *dev)
 
        clk_disable(sport->clk_ipg);
 
+       pinctrl_pm_select_sleep_state(dev);
+
        return 0;
 }
 
@@ -2283,6 +2285,8 @@ static int imx_serial_port_resume_noirq(struct device *dev)
        struct imx_port *sport = platform_get_drvdata(pdev);
        int ret;
 
+       pinctrl_pm_select_default_state(dev);
+
        ret = clk_enable(sport->clk_ipg);
        if (ret)
                return ret;