summaryrefslogtreecommitdiffstats
path: root/arch/avr32/boards
diff options
context:
space:
mode:
authorHans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>2009-03-24 15:45:18 +0100
committerHaavard Skinnemoen <haavard.skinnemoen@atmel.com>2009-03-26 14:58:28 +0100
commit30754acf29a9329185ffd8dffbb0c83b5a539818 (patch)
tree965ade431188a64d131bd1d6a3fdc84682b04939 /arch/avr32/boards
parentfe272b5bd13d3522f9d1ed35425f1c7af4d8343f (diff)
downloadlinux-30754acf29a9329185ffd8dffbb0c83b5a539818.tar.gz
avr32: use GPIO line PB15 on EVKLCD10x boards for backlight
The PB15 GPIO line is used to control the enable and disable signal for the backlight regulator on EVKLCD10x boards. This patch hands the I/O line over to the LCDC driver, which will control when to enable and disable the backlight. Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com> [haavard.skinnemoen@atmel.com: reverted ac97c change] Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Diffstat (limited to 'arch/avr32/boards')
-rw-r--r--arch/avr32/boards/atngw100/evklcd10x.c20
1 files changed, 19 insertions, 1 deletions
diff --git a/arch/avr32/boards/atngw100/evklcd10x.c b/arch/avr32/boards/atngw100/evklcd10x.c
index fbc7b03..4e3ab8e 100644
--- a/arch/avr32/boards/atngw100/evklcd10x.c
+++ b/arch/avr32/boards/atngw100/evklcd10x.c
@@ -11,6 +11,7 @@
#include <linux/init.h>
#include <linux/linkage.h>
+#include <linux/gpio.h>
#include <linux/fb.h>
#include <linux/platform_device.h>
@@ -19,6 +20,7 @@
#include <asm/setup.h>
#include <mach/at32ap700x.h>
+#include <mach/portmux.h>
#include <mach/board.h>
static struct ac97c_platform_data __initdata ac97c0_data = {
@@ -144,13 +146,29 @@ static struct atmel_lcdfb_info __initdata atevklcd10x_lcdc_data = {
};
#endif
+static void atevklcd10x_lcdc_power_control(int on)
+{
+ gpio_set_value(GPIO_PIN_PB(15), on);
+}
+
static int __init atevklcd10x_init(void)
{
- at32_add_device_ac97c(0, &ac97c0_data);
+ /* PB15 is connected to the enable line on the boost regulator
+ * controlling the backlight for the LCD panel.
+ */
+ at32_select_gpio(GPIO_PIN_PB(15), AT32_GPIOF_OUTPUT);
+ gpio_request(GPIO_PIN_PB(15), "backlight");
+ gpio_direction_output(GPIO_PIN_PB(15), 0);
+
+ atevklcd10x_lcdc_data.atmel_lcdfb_power_control =
+ atevklcd10x_lcdc_power_control;
at32_add_device_lcdc(0, &atevklcd10x_lcdc_data,
fbmem_start, fbmem_size,
ATMEL_LCDC_ALT_18BIT | ATMEL_LCDC_PE_DVAL);
+
+ at32_add_device_ac97c(0, &ac97c0_data);
+
return 0;
}
postcore_initcall(atevklcd10x_init);