ARM: pxa: palmtc: Use PWM lookup table

Use a PWM lookup table to provide the PWM to the pwm-backlight device.
The driver has a legacy code path that is required only because boards
still use the legacy method of requesting PWMs by global ID. Replacing
these usages allows that legacy fallback to be removed.

Cc: Daniel Mack <daniel@zonque.org>
Cc: Haojian Zhuang <haojian.zhuang@gmail.com>
Cc: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>

diff --git a/arch/arm/mach-pxa/palmtc.c b/arch/arm/mach-pxa/palmtc.c
index 7691c974ca4bd0b6ade4c467e3ea6a26c611d9ce..aebf6de62468962b9398f6ee299c0539920cbba8 100644 (file)
--- a/arch/arm/mach-pxa/palmtc.c
+++ b/arch/arm/mach-pxa/palmtc.c
@@ -18,6 +18,7 @@
 #include <linux/delay.h>
 #include <linux/irq.h>
 #include <linux/input.h>
+#include <linux/pwm.h>
 #include <linux/pwm_backlight.h>
 #include <linux/gpio.h>
 #include <linux/input/matrix_keypad.h>
@@ -166,11 +167,14 @@ static inline void palmtc_keys_init(void) {}
  * Backlight
  ******************************************************************************/
 #if defined(CONFIG_BACKLIGHT_PWM) || defined(CONFIG_BACKLIGHT_PWM_MODULE)
+static struct pwm_lookup palmtc_pwm_lookup[] = {
+       PWM_LOOKUP("pxa25x-pwm.1", 0, "pwm-backlight.0", NULL, PALMTC_PERIOD_NS,
+                  PWM_PERIOD_NORMAL),
+};
+
 static struct platform_pwm_backlight_data palmtc_backlight_data = {
-       .pwm_id         = 1,
        .max_brightness = PALMTC_MAX_INTENSITY,
        .dft_brightness = PALMTC_MAX_INTENSITY,
-       .pwm_period_ns  = PALMTC_PERIOD_NS,
        .enable_gpio    = GPIO_NR_PALMTC_BL_POWER,
 };
 
@@ -184,6 +188,7 @@ static struct platform_device palmtc_backlight = {
 
 static void __init palmtc_pwm_init(void)
 {
+       pwm_add_table(palmtc_pwm_lookup, ARRAY_SIZE(palmtc_pwm_lookup));
        platform_device_register(&palmtc_backlight);
 }
 #else