git.ipfire.org Git - thirdparty/kernel/stable-queue.git/blob

   1 From 98d610c3739ac354319a6590b915f4624d9151e6 Mon Sep 17 00:00:00 2001
   2 From: "Lee, Chun-Yi" <joeyli.kernel@gmail.com>
   3 Date: Thu, 3 Nov 2016 08:18:52 +0800
   4 Subject: platform/x86: acer-wmi: setup accelerometer when machine has appropriate notify event
   5 MIME-Version: 1.0
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   8
   9 From: Lee, Chun-Yi <joeyli.kernel@gmail.com>
  10
  11 commit 98d610c3739ac354319a6590b915f4624d9151e6 upstream.
  12
  13 The accelerometer event relies on the ACERWMID_EVENT_GUID notify.
  14 So, this patch changes the codes to setup accelerometer input device
  15 when detected ACERWMID_EVENT_GUID. It avoids that the accel input
  16 device created on every Acer machines.
  17
  18 In addition, patch adds a clearly parsing logic of accelerometer hid
  19 to acer_wmi_get_handle_cb callback function. It is positive matching
  20 the "SENR" name with "BST0001" device to avoid non-supported hardware.
  21
  22 Reported-by: Bjørn Mork <bjorn@mork.no>
  23 Cc: Darren Hart <dvhart@infradead.org>
  24 Signed-off-by: Lee, Chun-Yi <jlee@suse.com>
  25 [andy: slightly massage commit message]
  26 Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
  27 Cc: Ben Hutchings <ben@decadent.org.uk>
  28 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  29
  30 ---
  31  drivers/platform/x86/acer-wmi.c |   22 ++++++++++++++++++----
  32  1 file changed, 18 insertions(+), 4 deletions(-)
  33
  34 --- a/drivers/platform/x86/acer-wmi.c
  35 +++ b/drivers/platform/x86/acer-wmi.c
  36 @@ -1867,11 +1867,24 @@ static int __init acer_wmi_enable_lm(voi
  37         return status;
  38  }
  39
  40 +#define ACER_WMID_ACCEL_HID    "BST0001"
  41 +
  42  static acpi_status __init acer_wmi_get_handle_cb(acpi_handle ah, u32 level,
  43                                                 void *ctx, void **retval)
  44  {
  45 +       struct acpi_device *dev;
  46 +
  47 +       if (!strcmp(ctx, "SENR")) {
  48 +               if (acpi_bus_get_device(ah, &dev))
  49 +                       return AE_OK;
  50 +               if (!strcmp(ACER_WMID_ACCEL_HID, acpi_device_hid(dev)))
  51 +                       return AE_OK;
  52 +       } else
  53 +               return AE_OK;
  54 +
  55         *(acpi_handle *)retval = ah;
  56 -       return AE_OK;
  57 +
  58 +       return AE_CTRL_TERMINATE;
  59  }
  60
  61  static int __init acer_wmi_get_handle(const char *name, const char *prop,
  62 @@ -1898,7 +1911,7 @@ static int __init acer_wmi_accel_setup(v
  63  {
  64         int err;
  65
  66 -       err = acer_wmi_get_handle("SENR", "BST0001", &gsensor_handle);
  67 +       err = acer_wmi_get_handle("SENR", ACER_WMID_ACCEL_HID, &gsensor_handle);
  68         if (err)
  69                 return err;
  70
  71 @@ -2274,10 +2287,11 @@ static int __init acer_wmi_init(void)
  72                 err = acer_wmi_input_setup();
  73                 if (err)
  74                         return err;
  75 +               err = acer_wmi_accel_setup();
  76 +               if (err)
  77 +                       return err;
  78         }
  79
  80 -       acer_wmi_accel_setup();
  81 -
  82         err = platform_driver_register(&acer_platform_driver);
  83         if (err) {
  84                 pr_err("Unable to register platform driver\n");