diff options
Diffstat (limited to 'drivers/auxdisplay')
| -rw-r--r-- | drivers/auxdisplay/Kconfig | 21 | ||||
| -rw-r--r-- | drivers/auxdisplay/charlcd.c | 10 |
2 files changed, 30 insertions, 1 deletions
diff --git a/drivers/auxdisplay/Kconfig b/drivers/auxdisplay/Kconfig index 7d3fe27d6868..c52c738e554a 100644 --- a/drivers/auxdisplay/Kconfig +++ b/drivers/auxdisplay/Kconfig @@ -445,6 +445,27 @@ config PANEL_BOOT_MESSAGE An empty message will only clear the display at driver init time. Any other printf()-formatted message is valid with newline and escape codes. +choice + prompt "Backlight initial state" + default CHARLCD_BL_FLASH + + config CHARLCD_BL_OFF + bool "Off" + help + Backlight is initially turned off + + config CHARLCD_BL_ON + bool "On" + help + Backlight is initially turned on + + config CHARLCD_BL_FLASH + bool "Flash" + help + Backlight is flashed briefly on init + +endchoice + endif # AUXDISPLAY config PANEL diff --git a/drivers/auxdisplay/charlcd.c b/drivers/auxdisplay/charlcd.c index 5212675564d7..92745efefb54 100644 --- a/drivers/auxdisplay/charlcd.c +++ b/drivers/auxdisplay/charlcd.c @@ -769,6 +769,14 @@ static void charlcd_puts(struct charlcd *lcd, const char *s) #define LCD_INIT_TEXT "Linux-" UTS_RELEASE "\n" #endif +#ifdef CONFIG_CHARLCD_BL_ON +#define LCD_INIT_BL "\x1b[L+" +#elif defined(CONFIG_CHARLCD_BL_FLASH) +#define LCD_INIT_BL "\x1b[L*" +#else +#define LCD_INIT_BL "\x1b[L-" +#endif + /* initialize the LCD driver */ static int charlcd_init(struct charlcd *lcd) { @@ -790,7 +798,7 @@ static int charlcd_init(struct charlcd *lcd) return ret; /* display a short message */ - charlcd_puts(lcd, "\x1b[Lc\x1b[Lb\x1b[L*" LCD_INIT_TEXT); + charlcd_puts(lcd, "\x1b[Lc\x1b[Lb" LCD_INIT_BL LCD_INIT_TEXT); /* clear the display on the next device opening */ priv->must_clear = true; |