cm: charger: Add support for double backlight displays
* Some devices using AMS AS36xx LEDs controllers
are using 2 backlight paths to light the display,
mostly on Sony Huashan and Sony Blue board devices
* Although most of the displays have interlaced backlights
and the half dark path can be hard to see, other displays
have a top / bottom path that make half the screen on / off
* Control the backlight level of both path if the device does have
BACKLIGHT_PATH set, and if present, SECONDARY_BACKLIGHT_PATH
* Leave the HEALTD_BACKLIGHT_LEVEL config accessible
to override the default 100 / 255 brightness used in healthd
Change-Id: If774c3e66acedddf7ba676581e7c88b7e83a66b6
Signed-off-by: Adrian DC <radian.dc@gmail.com>
diff --git a/charger/healthd_board_cm.cpp b/charger/healthd_board_cm.cpp
index c5aa3e6..8d38e5a 100644
--- a/charger/healthd_board_cm.cpp
+++ b/charger/healthd_board_cm.cpp
@@ -365,9 +365,49 @@
{
}
+#ifdef HEALTHD_BACKLIGHT_PATH
+#ifndef HEALTHD_BACKLIGHT_LEVEL
+#define HEALTHD_BACKLIGHT_LEVEL 100
+#endif
+
+void healthd_board_mode_charger_set_backlight(bool on)
+{
+ int fd;
+ char buffer[10];
+
+ memset(buffer, '\0', sizeof(buffer));
+ fd = open(HEALTHD_BACKLIGHT_PATH, O_RDWR);
+ if (fd < 0) {
+ LOGE("Could not open backlight node : %s\n", strerror(errno));
+ return;
+ }
+ LOGV("Enabling backlight\n");
+ snprintf(buffer, sizeof(buffer), "%d\n", on ? HEALTHD_BACKLIGHT_LEVEL : 0);
+ if (write(fd, buffer, strlen(buffer)) < 0) {
+ LOGE("Could not write to backlight : %s\n", strerror(errno));
+ }
+ close(fd);
+
+#ifdef HEALTHD_SECONDARY_BACKLIGHT_PATH
+ fd = open(HEALTHD_SECONDARY_BACKLIGHT_PATH, O_RDWR);
+ if (fd < 0) {
+ LOGE("Could not open second backlight node : %s\n", strerror(errno));
+ return;
+ }
+ LOGV("Enabling secondary backlight\n");
+ if (write(fd, buffer, strlen(buffer)) < 0) {
+ LOGE("Could not write to second backlight : %s\n", strerror(errno));
+ return;
+ }
+ close(fd);
+#endif
+}
+
+#else
void healthd_board_mode_charger_set_backlight(bool)
{
}
+#endif
void healthd_board_mode_charger_init(void)
{