usb: musb: am35x: usb dev_pm_ops structure

instead of using musb_platform_suspend_resume,
we can use dev_pm_ops and let platform_device
core handle when to call musb_core's suspend and
glue layer's suspend.

Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 45 insertions, 17 deletions

diff --git a/drivers/usb/musb/am35x.c b/drivers/usb/musb/am35x.c
index eacf1e09b495..fdc7c8878f8b 100644
--- a/drivers/usb/musb/am35x.c
+++ b/drivers/usb/musb/am35x.c
@@ -88,6 +88,7 @@ struct am35x_glue {
         struct clk              *phy_clk;
         struct clk              *clk;
 };
+#define glue_to_musb(g)         platform_get_drvdata(g->musb)
 
 static inline void phy_on(void)
 {
@@ -462,20 +463,6 @@ static int am35x_musb_exit(struct musb *musb)
         return 0;
 }
 
-static int am35x_musb_suspend(struct musb *musb)
-{
-        phy_off();
-
-        return 0;
-}
-
-static int am35x_musb_resume(struct musb *musb)
-{
-        phy_on();
-
-        return 0;
-}
-
 /* AM35x supports only 32bit read operation */
 void musb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *dst)
 {
@@ -516,9 +503,6 @@ static const struct musb_platform_ops am35x_ops = {
         .set_mode       = am35x_musb_set_mode,
         .try_idle       = am35x_musb_try_idle,
 
-        .suspend        = am35x_musb_suspend,
-        .resume         = am35x_musb_resume,
-
         .set_vbus       = am35x_musb_set_vbus,
 };
 
@@ -644,10 +628,54 @@ static int __exit am35x_remove(struct platform_device *pdev)
         return 0;
 }
 
+#ifdef CONFIG_PM
+static int am35x_suspend(struct device *dev)
+{
+        struct am35x_glue       *glue = dev_get_drvdata(dev);
+
+        phy_off();
+        clk_disable(glue->phy_clk);
+        clk_disable(glue->clk);
+
+        return 0;
+}
+
+static int am35x_resume(struct device *dev)
+{
+        struct am35x_glue       *glue = dev_get_drvdata(dev);
+        int                     ret;
+
+        phy_on();
+        ret = clk_enable(glue->phy_clk);
+        if (ret) {
+                dev_err(dev, "failed to enable PHY clock\n");
+                return ret;
+        }
+
+        ret = clk_enable(glue->clk);
+        if (ret) {
+                dev_err(dev, "failed to enable clock\n");
+                return ret;
+        }
+
+        return 0;
+}
+
+static struct dev_pm_ops am35x_pm_ops = {
+        .suspend        = am35x_suspend,
+        .resume         = am35x_resume,
+};
+
+#define DEV_PM_OPS      &am35x_pm_ops
+#else
+#define DEV_PM_OPS      NULL
+#endif
+
 static struct platform_driver am35x_driver = {
         .remove         = __exit_p(am35x_remove),
         .driver         = {
                 .name   = "musb-am35x",
+                .pm     = DEV_PM_OPS,
         },
 };