target/linux/ipq806x/patches-4.4/096-10-usb-dwc3-core-fix-PHY-handling-during-suspend.patch

   1 From 5c4ad318de3b8e8680d654c82a254c4b65243739 Mon Sep 17 00:00:00 2001
   2 From: Felipe Balbi <balbi@kernel.org>
   3 Date: Mon, 11 Apr 2016 17:12:34 +0300
   4 Subject: usb: dwc3: core: fix PHY handling during suspend
   5
   6 we need to power off the PHY during suspend and
   7 power it back on during resume.
   8
   9 Signed-off-by: Felipe Balbi <balbi@kernel.org>
  10 [nsekhar@ti.com: fix call to usb_phy_set_suspend() in dwc3_suspend()]
  11 Signed-off-by: Sekhar Nori <nsekhar@ti.com>
  12 Signed-off-by: Roger Quadros <rogerq@ti.com>
  13 Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
  14 ---
  15  drivers/usb/dwc3/core.c | 23 ++++++++++++++++++++++-
  16  1 file changed, 22 insertions(+), 1 deletion(-)
  17
  18 --- a/drivers/usb/dwc3/core.c
  19 +++ b/drivers/usb/dwc3/core.c
  20 @@ -1124,6 +1124,11 @@ static int dwc3_suspend(struct device *d
  21         phy_exit(dwc->usb2_generic_phy);
  22         phy_exit(dwc->usb3_generic_phy);
  23
  24 +       usb_phy_set_suspend(dwc->usb2_phy, 1);
  25 +       usb_phy_set_suspend(dwc->usb3_phy, 1);
  26 +       WARN_ON(phy_power_off(dwc->usb2_generic_phy) < 0);
  27 +       WARN_ON(phy_power_off(dwc->usb3_generic_phy) < 0);
  28 +
  29         pinctrl_pm_select_sleep_state(dev);
  30
  31         return 0;
  32 @@ -1137,11 +1142,21 @@ static int dwc3_resume(struct device *de
  33
  34         pinctrl_pm_select_default_state(dev);
  35
  36 +       usb_phy_set_suspend(dwc->usb2_phy, 0);
  37 +       usb_phy_set_suspend(dwc->usb3_phy, 0);
  38 +       ret = phy_power_on(dwc->usb2_generic_phy);
  39 +       if (ret < 0)
  40 +               return ret;
  41 +
  42 +       ret = phy_power_on(dwc->usb3_generic_phy);
  43 +       if (ret < 0)
  44 +               goto err_usb2phy_power;
  45 +
  46         usb_phy_init(dwc->usb3_phy);
  47         usb_phy_init(dwc->usb2_phy);
  48         ret = phy_init(dwc->usb2_generic_phy);
  49         if (ret < 0)
  50 -               return ret;
  51 +               goto err_usb3phy_power;
  52
  53         ret = phy_init(dwc->usb3_generic_phy);
  54         if (ret < 0)
  55 @@ -1174,6 +1189,12 @@ static int dwc3_resume(struct device *de
  56  err_usb2phy_init:
  57         phy_exit(dwc->usb2_generic_phy);
  58
  59 +err_usb3phy_power:
  60 +       phy_power_off(dwc->usb3_generic_phy);
  61 +
  62 +err_usb2phy_power:
  63 +       phy_power_off(dwc->usb2_generic_phy);
  64 +
  65         return ret;
  66  }
  67