commit f73bc576b86c1276cfc1dbc230f622af4feb852d
author HuiWang <huiwan@codeaurora.org> Wed Jul 31 10:48:36 2013 +0800
committer Gerrit - the friendly Code Review server <code-review@localhost> Sun Aug 18 19:20:51 2013 -0700
tree 462742c11bf76d7372ddfda4f12e9ee7812c7b99
parent a1af059bbac3bb0b55377e3614abc34c7d19bbd1

BackLight: Add support for button backlight.

Add function call to let framework layer could enable/disable the
button backlight.

Change-Id: I470ebb8953c5d3fdb72118dbaf06788c2079213e

liblight/lights.c

diff --git a/liblight/lights.c b/liblight/lights.c
index eb71b74..ccfbe10 100644
--- a/liblight/lights.c
+++ b/liblight/lights.c
@@ -51,6 +51,9 @@
 char const*const LCD_FILE
         = "/sys/class/leds/lcd-backlight/brightness";
 
+char const*const BUTTON_FILE
+        = "/sys/class/leds/button-backlight/brightness";
+
 char const*const RED_BLINK_FILE
         = "/sys/class/leds/red/blink";
 
@@ -209,6 +212,16 @@
     return 0;
 }
 
+static int
+set_light_buttons(struct light_device_t* dev,
+        struct light_state_t const* state)
+{
+    int err = 0;
+    pthread_mutex_lock(&g_lock);
+    err = write_int(BUTTON_FILE, state->color & 0xFF);
+    pthread_mutex_unlock(&g_lock);
+    return err;
+}
 
 /** Close the lights device */
 static int
@@ -238,6 +251,8 @@
         set_light = set_light_backlight;
     else if (0 == strcmp(LIGHT_ID_NOTIFICATIONS, name))
         set_light = set_light_notifications;
+    else if (0 == strcmp(LIGHT_ID_BUTTONS, name))
+        set_light = set_light_buttons;
     else if (0 == strcmp(LIGHT_ID_ATTENTION, name))
         set_light = set_light_attention;
     else