1 files changed, 84 insertions, 0 deletions

diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c
index f31fa4efa725..d93e962f2610 100644
--- a/drivers/platform/x86/dell-laptop.c
+++ b/drivers/platform/x86/dell-laptop.c
@@ -60,6 +60,22 @@ struct calling_interface_structure {
         struct calling_interface_token tokens[];
 } __packed;
 
+struct quirk_entry {
+        u8 touchpad_led;
+};
+
+static struct quirk_entry *quirks;
+
+static struct quirk_entry quirk_dell_vostro_v130 = {
+        .touchpad_led = 1,
+};
+
+static int dmi_matched(const struct dmi_system_id *dmi)
+{
+        quirks = dmi->driver_data;
+        return 1;
+}
+
 static int da_command_address;
 static int da_command_code;
 static int da_num_tokens;
@@ -149,6 +165,27 @@ static struct dmi_system_id __devinitdata dell_blacklist[] = {
         {}
 };
 
+static struct dmi_system_id __devinitdata dell_quirks[] = {
+        {
+                .callback = dmi_matched,
+                .ident = "Dell Vostro V130",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V130"),
+                },
+                .driver_data = &quirk_dell_vostro_v130,
+        },
+        {
+                .callback = dmi_matched,
+                .ident = "Dell Vostro V131",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"),
+                },
+                .driver_data = &quirk_dell_vostro_v130,
+        },
+};
+
 static struct calling_interface_buffer *buffer;
 static struct page *bufferpage;
 static DEFINE_MUTEX(buffer_mutex);
@@ -552,6 +589,44 @@ static const struct backlight_ops dell_ops = {
         .update_status  = dell_send_intensity,
 };
 
+static void touchpad_led_on(void)
+{
+        int command = 0x97;
+        char data = 1;
+        i8042_command(&data, command | 1 << 12);
+}
+
+static void touchpad_led_off(void)
+{
+        int command = 0x97;
+        char data = 2;
+        i8042_command(&data, command | 1 << 12);
+}
+
+static void touchpad_led_set(struct led_classdev *led_cdev,
+        enum led_brightness value)
+{
+        if (value > 0)
+                touchpad_led_on();
+        else
+                touchpad_led_off();
+}
+
+static struct led_classdev touchpad_led = {
+        .name = "dell-laptop::touchpad",
+        .brightness_set = touchpad_led_set,
+};
+
+static int __devinit touchpad_led_init(struct device *dev)
+{
+        return led_classdev_register(dev, &touchpad_led);
+}
+
+static void touchpad_led_exit(void)
+{
+        led_classdev_unregister(&touchpad_led);
+}
+
 static bool dell_laptop_i8042_filter(unsigned char data, unsigned char str,
                               struct serio *port)
 {
@@ -584,6 +659,10 @@ static int __init dell_init(void)
         if (!dmi_check_system(dell_device_table))
                 return -ENODEV;
 
+        quirks = NULL;
+        /* find if this machine support other functions */
+        dmi_check_system(dell_quirks);
+
         dmi_walk(find_tokens, NULL);
 
         if (!da_tokens)  {
@@ -626,6 +705,9 @@ static int __init dell_init(void)
                 goto fail_filter;
         }
 
+        if (quirks && quirks->touchpad_led)
+                touchpad_led_init(&platform_device->dev);
+
         dell_laptop_dir = debugfs_create_dir("dell_laptop", NULL);
         if (dell_laptop_dir != NULL)
                 debugfs_create_file("rfkill", 0444, dell_laptop_dir, NULL,
@@ -692,6 +774,8 @@ fail_platform_driver:
 static void __exit dell_exit(void)
 {
         debugfs_remove_recursive(dell_laptop_dir);
+        if (quirks && quirks->touchpad_led)
+                touchpad_led_exit();
         i8042_remove_filter(dell_laptop_i8042_filter);
         cancel_delayed_work_sync(&dell_rfkill_work);
         backlight_device_unregister(dell_backlight_device);