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authorSven Neumann <s.neumann@raumfeld.com>2011-05-25 15:37:31 +0400
committerEric Miao <eric.y.miao@gmail.com>2011-07-11 10:26:31 +0400
commit8c568df9d7e9b40063f0a5d4235e3d28df88f92a (patch)
tree64426e9b47bd6fb1e45339086c43a06846ba8d95 /arch
parenta065685d2f0b4bb69d0f64d2cd396a5c463db2a9 (diff)
downloadlinux-8c568df9d7e9b40063f0a5d4235e3d28df88f92a.tar.xz
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>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-pxa/raumfeld.c11
1 files 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)