ARM: pxa: viper: 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/viper.c b/arch/arm/mach-pxa/viper.c
index 4841d6cefe76affc01d8bdf1b82d97f67909c7af..b09e8cadd41f8beef7007c215c93e489f508f80b 100644 (file)
--- a/arch/arm/mach-pxa/viper.c
+++ b/arch/arm/mach-pxa/viper.c
@@ -39,6 +39,7 @@
 #include <linux/i2c/pxa-i2c.h>
 #include <linux/serial_8250.h>
 #include <linux/smc91x.h>
+#include <linux/pwm.h>
 #include <linux/pwm_backlight.h>
 #include <linux/usb/isp116x.h>
 #include <linux/mtd/mtd.h>
@@ -350,6 +351,11 @@ static struct pxafb_mach_info fb_info = {
        .lcd_conn               = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
 };
 
+static struct pwm_lookup viper_pwm_lookup[] = {
+       PWM_LOOKUP("pxa25x-pwm.0", 0, "pwm-backlight.0", NULL, 1000000,
+                  PWM_POLARITY_NORMAL),
+};
+
 static int viper_backlight_init(struct device *dev)
 {
        int ret;
@@ -398,10 +404,8 @@ static void viper_backlight_exit(struct device *dev)
 }
 
 static struct platform_pwm_backlight_data viper_backlight_data = {
-       .pwm_id         = 0,
        .max_brightness = 100,
        .dft_brightness = 100,
-       .pwm_period_ns  = 1000000,
        .enable_gpio    = -1,
        .init           = viper_backlight_init,
        .notify         = viper_backlight_notify,
@@ -939,6 +943,7 @@ static void __init viper_init(void)
                smc91x_device.num_resources--;
 
        pxa_set_i2c_info(NULL);
+       pwm_add_table(viper_pwm_lookup, ARRAY_SIZE(viper_pwm_lookup));
        platform_add_devices(viper_devs, ARRAY_SIZE(viper_devs));
 
        viper_init_vcore_gpios();