lkml.org 
[lkml]   [2016]   [Apr]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 2/2] usb: dwc3: core: fix PHY handling during suspend
Date
From: Felipe Balbi <balbi@kernel.org>

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>
---
drivers/usb/dwc3/core.c | 23 ++++++++++++++++++++++-
1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 17fd8144..44ff68e 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -1162,6 +1162,11 @@ static int dwc3_suspend(struct device *dev)
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;
@@ -1175,11 +1180,21 @@ static int dwc3_resume(struct device *dev)

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)
@@ -1212,6 +1227,12 @@ static int dwc3_resume(struct device *dev)
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;
}

--
2.5.0
\
 
 \ /
  Last update: 2016-04-11 16:21    [W:0.049 / U:1.804 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site