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>
diff --git a/arch/arm/mach-pxa/raumfeld.c b/arch/arm/mach-pxa/raumfeld.c
index d130f77..8e5b3d8 100644
--- a/arch/arm/mach-pxa/raumfeld.c
+++ b/arch/arm/mach-pxa/raumfeld.c
@@ -598,14 +598,15 @@
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)