Changeset 4581

Timestamp:

08/05/08 08:08:47 (5 years ago)

Author:

raster

Message:

fix brightness/bl power setting.

File:

• developers/raster/ompower/power.c (modified) (5 diffs)

developers/raster/ompower/power.c

@@ -1 +1 @@
 #include "main.h"
+
+static void
+file_write(const char *file, int val)
+{
+   char buf[80];
+   int fd;
+   
+   snprintf(buf, sizeof(buf), "%i\n", val);
+   fd = open(file, O_RDWR);
+   if (fd < 0) return;
+   write(fd, buf, strlen(buf));
+   close(fd);
+}
+
+static int
+file_read(const char *file)
+{
+   char buf[80];
+   int fd, len;
+   
+   fd = open(file, O_RDONLY);
+   if (fd < 0) return -1;
+   len = read(fd, buf, sizeof(buf) - 1);
+   if (len <= 0)
+     {
+        close(fd);
+        return -1;
+     }
+   buf[len] = 0;
+   close(fd);
+   return atoi(buf);
+}
 
 void
@@ -11 +43 @@
    // hack - force activate screensaver
 //   system("xset s activate");
-   fd = open("/sys/devices/platform/s3c2440-i2c/i2c-adapter/i2c-0/0-0073/backlight/pcf50633-bl", O_RDWR);
+   fd = open("/sys/devices/platform/s3c2440-i2c/i2c-adapter/i2c-0/0-0073/backlight/pcf50633-bl/bl_power", O_RDWR);
    if (fd >= 0)
      {
@@ -26 +58 @@
    const char *string = "0\n";
 
-   fd = open("/sys/devices/platform/s3c2440-i2c/i2c-adapter/i2c-0/0-0073/backlight/pcf50633-bl", O_RDWR);
+   fd = open("/sys/devices/platform/s3c2440-i2c/i2c-adapter/i2c-0/0-0073/backlight/pcf50633-bl/bl_power", O_RDWR);
    if (fd >= 0)
      {
@@ -37 +69 @@
 }
 
+int
+brightness_get(void)
+{
+   return file_read("/sys/devices/platform/s3c2440-i2c/i2c-adapter/i2c-0/0-0073/backlight/pcf50633-bl/brightness");
+}
+
+void
+brightness_set(int val)
+{
+   file_write("/sys/devices/platform/s3c2440-i2c/i2c-adapter/i2c-0/0-0073/backlight/pcf50633-bl/brightness", val);
+}
+
 void
 cpu_suspend(void)
 {
    int manual_resume = 0;
+   int prev_brightness;
+
+   prev_brightness = brightness_get();
+   screen_off();
    
-   screen_off();
+   sleep(1);
    system("apm -s");
    
@@ -49 +97 @@
    
    if (manual_resume)
-     screen_on();
+     {
+        screen_on();
+        brightness_set(prev_brightness);
+     }
 }