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-rw-r--r--board/lwmon5/lwmon5.c24
1 files changed, 21 insertions, 3 deletions
diff --git a/board/lwmon5/lwmon5.c b/board/lwmon5/lwmon5.c
index 7c5f6cc..e5fa259 100644
--- a/board/lwmon5/lwmon5.c
+++ b/board/lwmon5/lwmon5.c
@@ -567,11 +567,13 @@ unsigned int board_video_init (void)
return CFG_LIME_BASE_0;
}
-void board_backlight_switch (int flag)
+#define DEFAULT_BRIGHTNESS 0x64
+
+static void board_backlight_brightness(int brightness)
{
- if (flag) {
+ if (brightness > 0) {
/* pwm duty, lamp on */
- out_be32((void *)(CFG_FPGA_BASE_0 + 0x00000024), 0x64);
+ out_be32((void *)(CFG_FPGA_BASE_0 + 0x00000024), brightness);
out_be32((void *)(CFG_FPGA_BASE_0 + 0x00000020), 0x701);
} else {
/* lamp off */
@@ -580,6 +582,22 @@ void board_backlight_switch (int flag)
}
}
+void board_backlight_switch (int flag)
+{
+ char * param;
+ int rc;
+
+ if (flag) {
+ param = getenv("brightness");
+ rc = param ? simple_strtol(param, NULL, 10) : -1;
+ if (rc < 0)
+ rc = DEFAULT_BRIGHTNESS;
+ } else {
+ rc = 0;
+ }
+ board_backlight_brightness(rc);
+}
+
#if defined(CONFIG_CONSOLE_EXTRA_INFO)
/*
* Return text to be printed besides the logo.