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platform/x86: acer-wmi: setup accelerometer when machine has appropriate notify event 

The accelerometer event relies on the ACERWMID_EVENT_GUID notify.
So, this patch changes the codes to setup accelerometer input device
when detected ACERWMID_EVENT_GUID. It avoids that the accel input
device created on every Acer machines.

In addition, patch adds a clearly parsing logic of accelerometer hid
to acer_wmi_get_handle_cb callback function. It is positive matching
the "SENR" name with "BST0001" device to avoid non-supported hardware.

Reported-by: Bjørn Mork <bjorn@mork.no>
Cc: Darren Hart <dvhart@infradead.org>
Signed-off-by: Lee, Chun-Yi <jlee@suse.com>
[andy: slightly massage commit message]
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
This commit is contained in:
Lee, Chun-Yi 2016-11-03 08:18:52 +08:00 committed by Andy Shevchenko
parent 5f25b0054f
commit 98d610c373
1 changed files with 18 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/platform/x86/acer-wmi.c
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@ -1846,11 +1846,24 @@ static int __init acer_wmi_enable_lm(void)
return status;
}
#define ACER_WMID_ACCEL_HID "BST0001"
static acpi_status __init acer_wmi_get_handle_cb(acpi_handle ah, u32 level,
void *ctx, void **retval)
{
struct acpi_device *dev;
if (!strcmp(ctx, "SENR")) {
if (acpi_bus_get_device(ah, &dev))
return AE_OK;
if (!strcmp(ACER_WMID_ACCEL_HID, acpi_device_hid(dev)))
return AE_OK;
} else
return AE_OK;
*(acpi_handle *)retval = ah;
return AE_OK;
return AE_CTRL_TERMINATE;
}
static int __init acer_wmi_get_handle(const char *name, const char *prop,
@ -1877,7 +1890,7 @@ static int __init acer_wmi_accel_setup(void)
{
int err;
err = acer_wmi_get_handle("SENR", "BST0001", &gsensor_handle);
err = acer_wmi_get_handle("SENR", ACER_WMID_ACCEL_HID, &gsensor_handle);
if (err)
return err;
@ -2233,10 +2246,11 @@ static int __init acer_wmi_init(void)
err = acer_wmi_input_setup();
if (err)
return err;
err = acer_wmi_accel_setup();
if (err)
return err;
}
acer_wmi_accel_setup();
err = platform_driver_register(&acer_platform_driver);
if (err) {
pr_err("Unable to register platform driver\n");