From 8c568df9d7e9b40063f0a5d4235e3d28df88f92a Mon Sep 17 00:00:00 2001 From: Sven Neumann Date: Wed, 25 May 2011 13:37:31 +0200 Subject: [PATCH] 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 Acked-by: Daniel Mack Signed-off-by: Eric Miao --- arch/arm/mach-pxa/raumfeld.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/arch/arm/mach-pxa/raumfeld.c b/arch/arm/mach-pxa/raumfeld.c index d130f77b6d11..8e5b3d8a86be 100644 --- a/arch/arm/mach-pxa/raumfeld.c +++ b/arch/arm/mach-pxa/raumfeld.c @@ -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) -- 2.30.2