target/linux/ipq806x/patches-4.9/0074-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 | 12 ++++++++++++
  15  1 file changed, 12 insertions(+)
  16
  17 (limited to 'drivers/usb/dwc3/dwc3-of-simple.c')
  18
  19 diff --git a/drivers/usb/dwc3/dwc3-of-simple.c b/drivers/usb/dwc3/dwc3-of-simple.c
  20 index f9e92ef..49bf556 100644
  21 --- a/drivers/usb/dwc3/dwc3-of-simple.c
  22 +++ b/drivers/usb/dwc3/dwc3-of-simple.c
  23 @@ -26,6 +26,7 @@
  24  #include <linux/dma-mapping.h>
  25  #include <linux/clk.h>
  26  #include <linux/clk-provider.h>
  27 +#include <linux/reset.h>
  28  #include <linux/of.h>
  29  #include <linux/of_platform.h>
  30  #include <linux/pm_runtime.h>
  31 @@ -34,6 +35,7 @@ struct dwc3_of_simple {
  32         struct device           *dev;
  33         struct clk              **clks;
  34         int                     num_clocks;
  35 +       struct reset_control    *mstr_rst;
  36  };
  37
  38  static int dwc3_of_simple_probe(struct platform_device *pdev)
  39 @@ -89,6 +91,13 @@ static int dwc3_of_simple_probe(struct platform_device *pdev)
  40                 simple->clks[i] = clk;
  41         }
  42
  43 +       simple->mstr_rst = devm_reset_control_get(dev, "usb30_mstr_rst");
  44 +
  45 +       if (!IS_ERR(simple->mstr_rst))
  46 +               reset_control_deassert(simple->mstr_rst);
  47 +       else
  48 +               dev_dbg(simple->dev, "cannot get handle for master reset control\n");
  49 +
  50         ret = of_platform_populate(np, NULL, NULL, dev);
  51         if (ret) {
  52                 for (i = 0; i < simple->num_clocks; i++) {
  53 @@ -117,6 +126,9 @@ static int dwc3_of_simple_remove(struct platform_device *pdev)
  54                 clk_put(simple->clks[i]);
  55         }
  56
  57 +       if (!IS_ERR(simple->mstr_rst))
  58 +               reset_control_assert(simple->mstr_rst);
  59 +
  60         of_platform_depopulate(dev);
  61
  62         pm_runtime_put_sync(dev);
  63 --
  64 cgit v1.1