target/linux/ipq806x/patches-4.14/0074-ipq806x-usb-Control-USB-master-reset.patch

   1 From a86bda9f8a7965f0cedd347a9c04800eb9f41ea3 Mon Sep 17 00:00:00 2001
   2 From: Vasudevan Murugesan <vmuruges@codeaurora.org>
   3 Date: Tue, 21 Jul 2015 10:22:38 +0530
   4 Subject: ipq806x: usb: Control USB master reset
   5
   6 During removal of the glue layer(dwc3-of-simple),
   7 USB master reset is set to active and during insertion
   8 it is de-activated.
   9
  10 Change-Id: I537dc810f6cb2a46664ee674840145066432b957
  11 Signed-off-by: Vasudevan Murugesan <vmuruges@codeaurora.org>
  12 (cherry picked from commit 4611e13580a216812f85f0801b95442d02eeb836)
  13 ---
  14  drivers/usb/dwc3/dwc3-of-simple.c | 22 ++++++++++++++++++++++
  15  1 file changed, 12 insertions(+)
  16
  17 (limited to 'drivers/usb/dwc3/dwc3-of-simple.c')
  18
  19 --- a/drivers/usb/dwc3/dwc3-of-simple.c
  20 +++ b/drivers/usb/dwc3/dwc3-of-simple.c
  21 @@ -25,6 +25,7 @@
  22  #include <linux/platform_device.h>
  23  #include <linux/dma-mapping.h>
  24  #include <linux/clk.h>
  25 +#include <linux/reset.h>
  26  #include <linux/of.h>
  27  #include <linux/of_platform.h>
  28  #include <linux/pm_runtime.h>
  29 @@ -33,6 +34,8 @@
  30         struct device           *dev;
  31         struct clk              **clks;
  32         int                     num_clocks;
  33 +       struct reset_control    *mstr_rst_30_0;
  34 +       struct reset_control    *mstr_rst_30_1;
  35  };
  36
  37  static int dwc3_of_simple_clk_init(struct dwc3_of_simple *simple, int count)
  38 @@ -102,6 +105,20 @@
  39         if (ret)
  40                 return ret;
  41
  42 +       simple->mstr_rst_30_0 = devm_reset_control_get(dev, "usb30_0_mstr_rst");
  43 +
  44 +       if (!IS_ERR(simple->mstr_rst_30_0))
  45 +               reset_control_deassert(simple->mstr_rst_30_0);
  46 +       else
  47 +               dev_dbg(simple->dev, "cannot get handle for USB PHY 0 master reset control\n");
  48 +
  49 +       simple->mstr_rst_30_1 = devm_reset_control_get(dev, "usb30_1_mstr_rst");
  50 +
  51 +       if (!IS_ERR(simple->mstr_rst_30_1))
  52 +               reset_control_deassert(simple->mstr_rst_30_1);
  53 +       else
  54 +               dev_dbg(simple->dev, "cannot get handle for USB PHY 1 master reset control\n");
  55 +
  56         ret = of_platform_populate(np, NULL, NULL, dev);
  57         if (ret) {
  58                 for (i = 0; i < simple->num_clocks; i++) {
  59 @@ -130,6 +147,12 @@
  60                 clk_put(simple->clks[i]);
  61         }
  62
  63 +       if (!IS_ERR(simple->mstr_rst_30_0))
  64 +               reset_control_assert(simple->mstr_rst_30_0);
  65 +
  66 +       if (!IS_ERR(simple->mstr_rst_30_1))
  67 +               reset_control_assert(simple->mstr_rst_30_1);
  68 +
  69         of_platform_depopulate(dev);
  70
  71         pm_runtime_put_sync(dev);