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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>
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
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@ -11,6 +11,7 @@
#include <linux/init.h> #include <linux/init.h>
#include <linux/linkage.h> #include <linux/linkage.h>
#include <linux/gpio.h>
#include <linux/fb.h> #include <linux/fb.h>
#include <linux/platform_device.h> #include <linux/platform_device.h>
@ -19,6 +20,7 @@
#include <asm/setup.h> #include <asm/setup.h>
#include <mach/at32ap700x.h> #include <mach/at32ap700x.h>
#include <mach/portmux.h>
#include <mach/board.h> #include <mach/board.h>
static struct ac97c_platform_data __initdata ac97c0_data = { static struct ac97c_platform_data __initdata ac97c0_data = {
@ -144,13 +146,29 @@ static struct atmel_lcdfb_info __initdata atevklcd10x_lcdc_data = {
}; };
#endif #endif
static void atevklcd10x_lcdc_power_control(int on)
{
gpio_set_value(GPIO_PIN_PB(15), on);
}
static int __init atevklcd10x_init(void) 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, at32_add_device_lcdc(0, &atevklcd10x_lcdc_data,
fbmem_start, fbmem_size, fbmem_start, fbmem_size,
ATMEL_LCDC_ALT_18BIT | ATMEL_LCDC_PE_DVAL); ATMEL_LCDC_ALT_18BIT | ATMEL_LCDC_PE_DVAL);
at32_add_device_ac97c(0, &ac97c0_data);
return 0; return 0;
} }
postcore_initcall(atevklcd10x_init); postcore_initcall(atevklcd10x_init);