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avr32: use GPIO line PB15 on EVKLCD10x boards for backlight

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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>
This commit is contained in:
Hans-Christian Egtvedt 2009-03-24 15:45:18 +01:00 committed by Haavard Skinnemoen
parent fe272b5bd1
commit 30754acf29
1 changed files with 19 additions and 1 deletions
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20
arch/avr32/boards/atngw100/evklcd10x.c
View file

@ -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);