usb: phy: generic: add suspend support for regulator

Disable the vcc regulator on suspend and enable it on resume.

Signed-off-by: Stefan Eichenberger <stefan.eichenberger@toradex.com>
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Link: https://lore.kernel.org/r/20231027122955.22123-1-francesco@dolcini.it
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/phy/phy-generic.c b/drivers/usb/phy/phy-generic.c
index 770081b828a429326e8801981f9ec66a913b6890..9ab50f26db607180ab687e28e860dd38318d5386 100644 (file)
--- a/drivers/usb/phy/phy-generic.c
+++ b/drivers/usb/phy/phy-generic.c
@@ -46,15 +46,21 @@ EXPORT_SYMBOL_GPL(usb_phy_generic_unregister);
 static int nop_set_suspend(struct usb_phy *x, int suspend)
 {
        struct usb_phy_generic *nop = dev_get_drvdata(x->dev);
+       int ret = 0;
 
-       if (!IS_ERR(nop->clk)) {
-               if (suspend)
+       if (suspend) {
+               if (!IS_ERR(nop->clk))
                        clk_disable_unprepare(nop->clk);
-               else
+               if (!IS_ERR(nop->vcc) && !device_may_wakeup(x->dev))
+                       ret = regulator_disable(nop->vcc);
+       } else {
+               if (!IS_ERR(nop->vcc) && !device_may_wakeup(x->dev))
+                       ret = regulator_enable(nop->vcc);
+               if (!IS_ERR(nop->clk))
                        clk_prepare_enable(nop->clk);
        }
 
-       return 0;
+       return ret;
 }
 
 static void nop_reset(struct usb_phy_generic *nop)