Add device detecton for the ACPI accelerometer interface on Pegatron
Lucid tablets.
Signed-off-by: Andy Ross <andy.ross@xxxxxxxxxxxxx>
---
drivers/platform/x86/asus-laptop.c | 19 +++++++++++++++++++
1 files changed, 19 insertions(+), 0 deletions(-)
diff --git a/drivers/platform/x86/asus-laptop.c b/drivers/platform/x86/asus-laptop.c
index b397a4c..75c84f8 100644
--- a/drivers/platform/x86/asus-laptop.c
+++ b/drivers/platform/x86/asus-laptop.c
@@ -261,6 +261,7 @@ struct asus_laptop {
bool have_rsts;
bool have_pega_lucid;
int lcd_state;
+ struct platform_device *pega_accel;
struct rfkill *gps_rfkill;
@@ -1631,6 +1632,19 @@ static int __devinit asus_acpi_init(struct asus_laptop *asus)
return result;
}
+static void __devinit asus_pega_accel_init(struct asus_laptop *asus)
+{
+ /* Pegatron Lucid tablets expose their accelerometer through ACPI.
+ * Check for XLR{X,Y,Z} methods */
+ if (acpi_check_handle(asus->handle, "XLRX", NULL) ||
+ acpi_check_handle(asus->handle, "XLRY", NULL) ||
+ acpi_check_handle(asus->handle, "XLRZ", NULL))
+ return;
+
+ asus->pega_accel = platform_device_register_simple("pega_accel", -1,
+ NULL, 0);
+}
+
static bool asus_device_present;
static int __devinit asus_acpi_add(struct acpi_device *device)
@@ -1681,6 +1695,8 @@ static int __devinit asus_acpi_add(struct acpi_device *device)
goto fail_rfkill;
asus->have_pega_lucid = asus_check_pega_lucid(asus);
+ if (asus->have_pega_lucid)
+ asus_pega_accel_init(asus);
asus_device_present = true;
return 0;
@@ -1704,6 +1720,9 @@ static int asus_acpi_remove(struct acpi_device *device, int type)
{
struct asus_laptop *asus = acpi_driver_data(device);
+ if (asus->pega_accel)
+ platform_device_unregister(asus->pega_accel);
+
asus_backlight_exit(asus);
asus_rfkill_exit(asus);
asus_led_exit(asus);
--
1.7.1
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