usb: phy-generic: add short delay after pulling the reset pin

mgrzeschik · gregkh · commit ccdd4aac5f4b · 2024-04-09T17:37:35.000+02:00
After pulling the reset pin some phys are not immediately ready. We add a short delay of at least 10 ms to ensure that the phy can be properly used. Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de> Link: https://lore.kernel.org/r/20240402-phy-misc-v1-1-de5c17f93f17@pengutronix.de 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
@@ -71,6 +71,7 @@ static void nop_reset(struct usb_phy_generic *nop)
 	gpiod_set_value_cansleep(nop->gpiod_reset, 1);
 	usleep_range(10000, 20000);
 	gpiod_set_value_cansleep(nop->gpiod_reset, 0);
+	usleep_range(10000, 30000);
 }
 
 /* interface to regulator framework */

Original file line number	Diff line number	Diff line change
`@@ -71,6 +71,7 @@ static void nop_reset(struct usb_phy_generic *nop)`
`71`	`71`	`gpiod_set_value_cansleep(nop->gpiod_reset, 1);`
`72`	`72`	`usleep_range(10000, 20000);`
`73`	`73`	`gpiod_set_value_cansleep(nop->gpiod_reset, 0);`
	`74`	`+ usleep_range(10000, 30000);`
`74`	`75`	`}`
`75`	`76`
`76`	`77`	`/* interface to regulator framework */`