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 | 32 ++++++++++++++++++++++++++++++++
1 files changed, 32 insertions(+), 0 deletions(-)
diff --git a/drivers/platform/x86/asus-laptop.c b/drivers/platform/x86/asus-laptop.c
index d235f44..6ee7eca 100644
--- a/drivers/platform/x86/asus-laptop.c
+++ b/drivers/platform/x86/asus-laptop.c
@@ -4,6 +4,7 @@
*
* Copyright (C) 2002-2005 Julien Lerouge, 2003-2006 Karol Kozimor
* Copyright (C) 2006-2007 Corentin Chary
+ * Copyright (C) 2011 Wind River Systems
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -31,6 +32,7 @@
* Josh Green - Light Sens support
* Thomas Tuttle - His first patch for led support was very helpfull
* Sam Lin - GPS support
+ * Andy Ross - Pegatron Lucid accelerometer
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -246,6 +248,7 @@ struct asus_laptop {
int wireless_status;
bool have_rsts;
+ bool have_pega_accel;
int lcd_state;
struct rfkill *gps_rfkill;
@@ -1352,6 +1355,7 @@ static const struct attribute_group asus_attr_group = {
.attrs = asus_attributes,
};
+
static int asus_platform_init(struct asus_laptop *asus)
{
int result;
@@ -1556,6 +1560,29 @@ static int __devinit asus_acpi_init(struct asus_laptop *asus)
return result;
}
+static void pega_accel_noop_release(struct device *d) { }
+
+static struct platform_device pega_accel_dev = {
+ .name = "pega_accel",
+ .id = -1,
+ .dev = {
+ .release = pega_accel_noop_release,
+ },
+};
+
+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;
+
+ if (!platform_device_register(&pega_accel_dev))
+ asus->have_pega_accel = true;
+}
+
static bool asus_device_present;
static int __devinit asus_acpi_add(struct acpi_device *device)
@@ -1605,6 +1632,8 @@ static int __devinit asus_acpi_add(struct acpi_device *device)
if (result)
goto fail_rfkill;
+ asus_pega_accel_init(asus);
+
asus_device_present = true;
return 0;
@@ -1627,6 +1656,9 @@ static int asus_acpi_remove(struct acpi_device *device, int type)
{
struct asus_laptop *asus = acpi_driver_data(device);
+ if (asus->have_pega_accel)
+ platform_device_unregister(&pega_accel_dev);
+
asus_backlight_exit(asus);
asus_rfkill_exit(asus);
asus_led_exit(asus);
--
1.7.1
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