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Diffstat (limited to 'firmware/target/hosted/agptek/backlight-agptek.c')
-rw-r--r--firmware/target/hosted/agptek/backlight-agptek.c64
1 files changed, 64 insertions, 0 deletions
diff --git a/firmware/target/hosted/agptek/backlight-agptek.c b/firmware/target/hosted/agptek/backlight-agptek.c
new file mode 100644
index 0000000000..2f00787f72
--- /dev/null
+++ b/firmware/target/hosted/agptek/backlight-agptek.c
@@ -0,0 +1,64 @@
+/***************************************************************************
+ * __________ __ ___
+ * Open \______ \ ____ ____ | | _\_ |__ _______ ___
+ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
+ * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
+ * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
+ * \/ \/ \/ \/ \/
+ *
+ * Copyright (C) 2017 Marcin Bukat
+ *
+ * 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 the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdio.h>
+#include "config.h"
+#include "backlight-target.h"
+#include "sysfs.h"
+#include "panic.h"
+
+static const char * const sysfs_bl_brightness =
+ "/sys/class/backlight/pwm-backlight.0/brightness";
+
+static const char * const sysfs_bl_power =
+ "/sys/class/backlight/pwm-backlight.0/bl_power";
+
+bool backlight_hw_init(void)
+{
+ backlight_hw_on();
+ backlight_hw_brightness(DEFAULT_BRIGHTNESS_SETTING);
+ return true;
+}
+
+void backlight_hw_on(void)
+{
+ sysfs_set_int(sysfs_bl_power, 0);
+}
+
+void backlight_hw_off(void)
+{
+ sysfs_set_int(sysfs_bl_power, 1);
+}
+
+void backlight_hw_brightness(int brightness)
+{
+ /* cap range, just in case */
+ if (brightness > MAX_BRIGHTNESS_SETTING)
+ brightness = MAX_BRIGHTNESS_SETTING;
+ if (brightness < MIN_BRIGHTNESS_SETTING)
+ brightness = MIN_BRIGHTNESS_SETTING;
+
+ sysfs_set_int(sysfs_bl_brightness, brightness);
+}