summaryrefslogtreecommitdiffstats
path: root/drivers/usb/musb
diff options
context:
space:
mode:
authorTony Lindgren <tony@atomide.com>2019-04-30 09:59:36 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-04-30 17:55:08 +0200
commit10ac7e7757f5e264599409441362de67760ba787 (patch)
tree62b707efc2a867a6983250650eacc6146fb4bfab /drivers/usb/musb
parent41386bc8cb2e0943cbeaa63e1fdb6b66a874ca90 (diff)
downloadblackbird-op-linux-10ac7e7757f5e264599409441362de67760ba787.tar.gz
blackbird-op-linux-10ac7e7757f5e264599409441362de67760ba787.zip
usb: musb: omap2430: Add support for idling phy when musb is idle
I noticed that musb is blocking core retention for omap4 unlike for omap3. This is because for omap3 we have phy-twl4030-usb implement it's own PM runtime to handle errata "VUSB3V1 VBUS overvoltage debouncer not working when the PHY is powered down". That is done in order to keep the USB PHY powered when phy-twl4030-usb is loaded. For the other USB PHYs, we need to enable and disable the PHY based on musb PM runtime. With the session bit based PM runtime for musb core, we can now idle the USB PHY always when musb is idle. Note that adding these calls will not affect the twl4030 driver as it's phy functions will just query the PHY state without powering the PHY on or off. Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Bin Liu <b-liu@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/musb')
-rw-r--r--drivers/usb/musb/omap2430.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
index b1dd81fb5f55..a3d2fef67746 100644
--- a/drivers/usb/musb/omap2430.c
+++ b/drivers/usb/musb/omap2430.c
@@ -531,6 +531,9 @@ static int omap2430_runtime_suspend(struct device *dev)
omap2430_low_level_exit(musb);
+ phy_power_off(musb->phy);
+ phy_exit(musb->phy);
+
return 0;
}
@@ -542,6 +545,9 @@ static int omap2430_runtime_resume(struct device *dev)
if (!musb)
return 0;
+ phy_init(musb->phy);
+ phy_power_on(musb->phy);
+
omap2430_low_level_init(musb);
musb_writel(musb->mregs, OTG_INTERFSEL,
musb->context.otg_interfsel);
OpenPOWER on IntegriCloud