ARM: pxa: lpd270: 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/lpd270.c b/arch/arm/mach-pxa/lpd270.c
index b070167deef278e9859f3b86e929073ba8f5a43a..ab4e84f4ee0c497ce5a66b6a8140993410f6cfaa 100644 (file)
--- a/arch/arm/mach-pxa/lpd270.c
+++ b/arch/arm/mach-pxa/lpd270.c
@@ -23,6 +23,7 @@
 #include <linux/ioport.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/partitions.h>
+#include <linux/pwm.h>
 #include <linux/pwm_backlight.h>
 #include <linux/smc91x.h>
 
@@ -271,11 +272,14 @@ static struct platform_device lpd270_flash_device[2] = {
        },
 };
 
+static struct pwm_lookup lpd270_pwm_lookup[] = {
+       PWM_LOOKUP("pxa27x-pwm.0", 0, "pwm-backlight.0", NULL, 78770,
+                  PWM_POLARITY_NORMAL),
+};
+
 static struct platform_pwm_backlight_data lpd270_backlight_data = {
-       .pwm_id         = 0,
        .max_brightness = 1,
        .dft_brightness = 1,
-       .pwm_period_ns  = 78770,
        .enable_gpio    = -1,
 };
 
@@ -474,6 +478,7 @@ static void __init lpd270_init(void)
         */
        ARB_CNTRL = ARB_CORE_PARK | 0x234;
 
+       pwm_add_table(lpd270_pwm_lookup, ARRAY_SIZE(lpd270_pwm_lookup));
        platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));
 
        pxa_set_ac97_info(NULL);