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From 5c4ad318de3b8e8680d654c82a254c4b65243739 Mon Sep 17 00:00:00 2001
From: Felipe Balbi <balbi@kernel.org>
Date: Mon, 11 Apr 2016 17:12:34 +0300
Subject: usb: dwc3: core: fix PHY handling during suspend
we need to power off the PHY during suspend and
power it back on during resume.
Signed-off-by: Felipe Balbi <balbi@kernel.org>
[nsekhar@ti.com: fix call to usb_phy_set_suspend() in dwc3_suspend()]
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
---
drivers/usb/dwc3/core.c | 23 ++++++++++++++++++++++-
1 file changed, 22 insertions(+), 1 deletion(-)
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -1124,6 +1124,11 @@ static int dwc3_suspend(struct device *d
phy_exit(dwc->usb2_generic_phy);
phy_exit(dwc->usb3_generic_phy);
+ usb_phy_set_suspend(dwc->usb2_phy, 1);
+ usb_phy_set_suspend(dwc->usb3_phy, 1);
+ WARN_ON(phy_power_off(dwc->usb2_generic_phy) < 0);
+ WARN_ON(phy_power_off(dwc->usb3_generic_phy) < 0);
+
pinctrl_pm_select_sleep_state(dev);
return 0;
@@ -1137,11 +1142,21 @@ static int dwc3_resume(struct device *de
pinctrl_pm_select_default_state(dev);
+ usb_phy_set_suspend(dwc->usb2_phy, 0);
+ usb_phy_set_suspend(dwc->usb3_phy, 0);
+ ret = phy_power_on(dwc->usb2_generic_phy);
+ if (ret < 0)
+ return ret;
+
+ ret = phy_power_on(dwc->usb3_generic_phy);
+ if (ret < 0)
+ goto err_usb2phy_power;
+
usb_phy_init(dwc->usb3_phy);
usb_phy_init(dwc->usb2_phy);
ret = phy_init(dwc->usb2_generic_phy);
if (ret < 0)
- return ret;
+ goto err_usb3phy_power;
ret = phy_init(dwc->usb3_generic_phy);
if (ret < 0)
@@ -1174,6 +1189,12 @@ static int dwc3_resume(struct device *de
err_usb2phy_init:
phy_exit(dwc->usb2_generic_phy);
+err_usb3phy_power:
+ phy_power_off(dwc->usb3_generic_phy);
+
+err_usb2phy_power:
+ phy_power_off(dwc->usb2_generic_phy);
+
return ret;
}
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