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ARM: pxa/raumfeld: adapt to upcoming hardware change 

The backlight control is going to change back to PWM in the
upcoming Raumfeld Controller hardware revision.

Signed-off-by: Sven Neumann <s.neumann@raumfeld.com>
Acked-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
This commit is contained in:
Sven Neumann 2011-05-25 13:37:31 +02:00 committed by Eric Miao
parent a065685d2f
commit 8c568df9d7
1 changed files with 6 additions and 5 deletions
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11
arch/arm/mach-pxa/raumfeld.c
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@ -598,14 +598,15 @@ static void __init raumfeld_lcd_init(void)
pxa_set_fb_info(NULL, &raumfeld_sharp_lcd_info);
/* Earlier devices had the backlight regulator controlled
* via PWM, later versions use another controller for that */
if ((system_rev & 0xff) < 2) {
/* Hardware revision 2 has the backlight regulator controlled
* by an LT3593, earlier and later devices use PWM for that. */
if ((system_rev & 0xff) == 2) {
platform_device_register(&raumfeld_lt3593_device);
} else {
mfp_cfg_t raumfeld_pwm_pin_config = GPIO17_PWM0_OUT;
pxa3xx_mfp_config(&raumfeld_pwm_pin_config, 1);
platform_device_register(&raumfeld_pwm_backlight_device);
} else
platform_device_register(&raumfeld_lt3593_device);
}
ret = gpio_request(GPIO_TFT_VA_EN, "display VA enable");
if (ret < 0)