usb: musb: fix PHY power on/off

commit 3063a12be2b07c64e9802708a19489342e64c1a3 upstream.

commi 30a70b0 (usb: musb: fix obex in g_nokia.ko
causing kernel panic) removed phy_power_on()
and phy_power_off() calls from runtime PM callbacks
but it failed to note that the driver depended
on pm_runtime_get_sync() calls to power up the PHY,
thus leaving some platforms without any means to
have a working PHY.

Fix that by enabling the phy during omap2430_musb_init()
and killing it in omap2430_musb_exit().

Fixes: 30a70b0 (usb: musb: fix obex in g_nokia.ko causing kernel panic)
Cc: Pali Rohár <pali.rohar@gmail.com>
Cc: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
Reported-by: Michael Scott <hashcode0f@gmail.com>
Tested-by: Michael Scott <hashcode0f@gmail.com>
Tested-by: Stefan Roese <sr@denx.de>
Reported-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
index 8aa59a2..8e90d32 100644 (file)
--- a/drivers/usb/musb/omap2430.c
+++ b/drivers/usb/musb/omap2430.c
@@ -416,6 +416,7 @@ static int omap2430_musb_init(struct musb *musb)
                omap_musb_set_mailbox(glue);
 
        phy_init(musb->phy);
+       phy_power_on(musb->phy);
 
        pm_runtime_put_noidle(musb->controller);
        return 0;
@@ -478,6 +479,7 @@ static int omap2430_musb_exit(struct musb *musb)
        del_timer_sync(&musb_idle_timer);
 
        omap2430_low_level_exit(musb);
+       phy_power_off(musb->phy);
        phy_exit(musb->phy);
 
        return 0;