Commit a6bedd11 authored by Thierry Reding's avatar Thierry Reding Committed by Robert Jarzmik
Browse files

ARM: pxa: mainstone: 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: default avatarThierry Reding <thierry.reding@gmail.com>
[ split pwm_remove_table() call on 2 lines ]
Signed-off-by: default avatarRobert Jarzmik <robert.jarzmik@free.fr>
parent bd3208ba

arch/arm/mach-pxa/mainstone.c

+15 −4
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ 
#include <linux/mtd/partitions.h>

#include <linux/input.h>

#include <linux/gpio_keys.h>

#include <linux/pwm.h>

#include <linux/pwm_backlight.h>

#include <linux/smc91x.h>

#include <linux/i2c/pxa-i2c.h>
@@ -248,11 +249,14 @@ static struct platform_device mst_flash_device[2] = { 
};



#if defined(CONFIG_FB_PXA) || defined(CONFIG_FB_PXA_MODULE)

static struct pwm_lookup mainstone_pwm_lookup[] = {

	PWM_LOOKUP("pxa27x-pwm.0", 0, "pwm-backlight.0", NULL, 78770,

		   PWM_POLARITY_NORMAL),

};



static struct platform_pwm_backlight_data mainstone_backlight_data = {

	.pwm_id		= 0,

	.max_brightness	= 1023,

	.dft_brightness	= 1023,

	.pwm_period_ns	= 78770,

	.enable_gpio	= -1,

};
@@ -266,9 +270,16 @@ static struct platform_device mainstone_backlight_device = { 


static void __init mainstone_backlight_register(void)

{

	int ret = platform_device_register(&mainstone_backlight_device);

	if (ret)

	int ret;



	pwm_add_table(mainstone_pwm_lookup, ARRAY_SIZE(mainstone_pwm_lookup));



	ret = platform_device_register(&mainstone_backlight_device);

	if (ret) {

		printk(KERN_ERR "mainstone: failed to register backlight device: %d\n", ret);

		pwm_remove_table(mainstone_pwm_lookup,

				 ARRAY_SIZE(mainstone_pwm_lookup));

	}

}

#else

#define mainstone_backlight_register()	do { } while (0)