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 diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
  19 index fa20f5a9..34277ce 100644
  20 --- a/drivers/usb/dwc3/core.c
  21 +++ b/drivers/usb/dwc3/core.c
  22 @@ -1150,6 +1150,11 @@ static int dwc3_suspend(struct device *dev)
  23         phy_exit(dwc->usb2_generic_phy);
  24         phy_exit(dwc->usb3_generic_phy);
  25
  26 +       usb_phy_set_suspend(dwc->usb2_phy, 1);
  27 +       usb_phy_set_suspend(dwc->usb3_phy, 1);
  28 +       WARN_ON(phy_power_off(dwc->usb2_generic_phy) < 0);
  29 +       WARN_ON(phy_power_off(dwc->usb3_generic_phy) < 0);
  30 +
  31         pinctrl_pm_select_sleep_state(dev);
  32
  33         return 0;
  34 @@ -1163,11 +1168,21 @@ static int dwc3_resume(struct device *dev)
  35
  36         pinctrl_pm_select_default_state(dev);
  37
  38 +       usb_phy_set_suspend(dwc->usb2_phy, 0);
  39 +       usb_phy_set_suspend(dwc->usb3_phy, 0);
  40 +       ret = phy_power_on(dwc->usb2_generic_phy);
  41 +       if (ret < 0)
  42 +               return ret;
  43 +
  44 +       ret = phy_power_on(dwc->usb3_generic_phy);
  45 +       if (ret < 0)
  46 +               goto err_usb2phy_power;
  47 +
  48         usb_phy_init(dwc->usb3_phy);
  49         usb_phy_init(dwc->usb2_phy);
  50         ret = phy_init(dwc->usb2_generic_phy);
  51         if (ret < 0)
  52 -               return ret;
  53 +               goto err_usb3phy_power;
  54
  55         ret = phy_init(dwc->usb3_generic_phy);
  56         if (ret < 0)
  57 @@ -1200,6 +1215,12 @@ static int dwc3_resume(struct device *dev)
  58  err_usb2phy_init:
  59         phy_exit(dwc->usb2_generic_phy);
  60
  61 +err_usb3phy_power:
  62 +       phy_power_off(dwc->usb3_generic_phy);
  63 +
  64 +err_usb2phy_power:
  65 +       phy_power_off(dwc->usb2_generic_phy);
  66 +
  67         return ret;
  68  }
  69
  70 --
  71 cgit v0.12