asus-laptop: Platform detection for Pegatron Lucid

Recognize the Pegatron Lucid tablets by their method signatures.

Signed-off-by: Andy Ross <andy.ross@windriver.com>
Signed-off-by: Corentin Chary <corentin.chary@gmail.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>

2 files changed, 29 insertions, 10 deletions

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 1e88d478532..4e5623e4fa0 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -64,15 +64,17 @@ config ASUS_LAPTOP
         depends on INPUT
         depends on RFKILL || RFKILL = n
         select INPUT_SPARSEKMAP
+        select INPUT_POLLDEV
         ---help---
-          This is the new Linux driver for Asus laptops. It may also support some
-          MEDION, JVC or VICTOR laptops. It makes all the extra buttons generate
-          standard ACPI events and input events. It also adds
-          support for video output switching, LCD backlight control, Bluetooth and
-          Wlan control, and most importantly, allows you to blink those fancy LEDs.
+          This is a driver for Asus laptops, Lenovo SL and the Pegatron
+          Lucid tablet. It may also support some MEDION, JVC or VICTOR
+          laptops. It makes all the extra buttons generate standard
+          ACPI events and input events. It also adds support for video
+          output switching, LCD backlight control, Bluetooth and Wlan
+          control, and most importantly, allows you to blink those
+          fancy LEDs.
 
-          For more information and a userspace daemon for handling the extra
-          buttons see <http://acpi4asus.sf.net>.
+          For more information see <http://acpi4asus.sf.net>.
 
           If you have an ACPI-compatible ASUS laptop, say Y or M here.
 
diff --git a/drivers/platform/x86/asus-laptop.c b/drivers/platform/x86/asus-laptop.c
index fa6d7ec68b2..c08f4c26b98 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
@@ -48,6 +49,7 @@
 #include <linux/uaccess.h>
 #include <linux/input.h>
 #include <linux/input/sparse-keymap.h>
+#include <linux/input-polldev.h>
 #include <linux/rfkill.h>
 #include <linux/slab.h>
 #include <linux/dmi.h>
@@ -173,6 +175,12 @@ MODULE_PARM_DESC(wwan_status, "Set the wireless status on boot "
 #define METHOD_KBD_LIGHT_SET    "SLKB"
 #define METHOD_KBD_LIGHT_GET    "GLKB"
 
+/* For Pegatron Lucid tablet */
+#define DEVICE_NAME_PEGA        "Lucid"
+#define METHOD_PEGA_ENABLE      "ENPR"
+#define METHOD_PEGA_DISABLE     "DAPR"
+#define METHOD_PEGA_READ        "RDLN"
+
 /*
  * Define a specific led structure to keep the main structure clean
  */
@@ -209,6 +217,7 @@ struct asus_laptop {
 
         int wireless_status;
         bool have_rsts;
+        bool is_pega_lucid;
 
         struct rfkill *gps_rfkill;
 
@@ -323,6 +332,14 @@ static int acpi_check_handle(acpi_handle handle, const char *method,
         return 0;
 }
 
+static bool asus_check_pega_lucid(struct asus_laptop *asus)
+{
+        return !strcmp(asus->name, DEVICE_NAME_PEGA) &&
+           !acpi_check_handle(asus->handle, METHOD_PEGA_ENABLE, NULL) &&
+           !acpi_check_handle(asus->handle, METHOD_PEGA_DISABLE, NULL) &&
+           !acpi_check_handle(asus->handle, METHOD_PEGA_READ, NULL);
+}
+
 /* Generic LED function */
 static int asus_led_set(struct asus_laptop *asus, const char *method,
                          int value)
@@ -1203,7 +1220,6 @@ static mode_t asus_sysfs_is_visible(struct kobject *kobj,
                    attr == &dev_attr_ls_level.attr) {
                 supported = !acpi_check_handle(handle, METHOD_ALS_CONTROL, NULL) &&
                             !acpi_check_handle(handle, METHOD_ALS_LEVEL, NULL);
-
         } else if (attr == &dev_attr_gps.attr) {
                 supported = !acpi_check_handle(handle, METHOD_GPS_ON, NULL) &&
                             !acpi_check_handle(handle, METHOD_GPS_OFF, NULL) &&
@@ -1439,9 +1455,10 @@ static int __devinit asus_acpi_add(struct acpi_device *device)
                 goto fail_platform;
 
         /*
-         * Register the platform device first.  It is used as a parent for the
-         * sub-devices below.
+         * Need platform type detection first, then the platform
+         * device.  It is used as a parent for the sub-devices below.
          */
+        asus->is_pega_lucid = asus_check_pega_lucid(asus);
         result = asus_platform_init(asus);
         if (result)
                 goto fail_platform;