openwrtv4/target/linux/ipq806x/patches-4.4/096-10-usb-dwc3-core-fix-PHY-handling-during-suspend.patch
Kevin Darbyshire-Bryant 102cb4742c kernel: bump to 4.4.35
Refresh patches on all 4.4 supported platforms.

077-0005-bgmac-stop-clearing-DMA-receive-control-register-rig.patch
removed as now upstream.

Compile & run tested: ar71xx - Archer C7 v2

Signed-off-by: Kevin Darbyshire-Bryant <kevin@darbyshire-bryant.me.uk>
2016-11-29 21:12:08 +01:00

67 lines
1.9 KiB
Diff

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;
}