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ARM: pxa: z2: 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>
This commit is contained in:
Thierry Reding 2015-10-05 10:49:56 +02:00 committed by Robert Jarzmik
parent 5a4412d4a8
commit a3827639a3
1 changed files with 9 additions and 4 deletions
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13
arch/arm/mach-pxa/z2.c
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@ -16,6 +16,7 @@
#include <linux/platform_device.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/pwm.h>
#include <linux/pwm_backlight.h>
#include <linux/z2_battery.h>
#include <linux/dma-mapping.h>
@ -199,21 +200,24 @@ static inline void z2_nor_init(void) {}
* Backlight
******************************************************************************/
#if defined(CONFIG_BACKLIGHT_PWM) || defined(CONFIG_BACKLIGHT_PWM_MODULE)
static struct pwm_lookup z2_pwm_lookup[] = {
PWM_LOOKUP("pxa27x-pwm.1", 0, "pwm-backlight.0", NULL, 1260320,
PWM_POLARITY_NORMAL),
PWM_LOOKUP("pxa27x-pwm.0", 1, "pwm-backlight.1", NULL, 1260320,
PWM_POLARITY_NORMAL),
};
static struct platform_pwm_backlight_data z2_backlight_data[] = {
[0] = {
/* Keypad Backlight */
.pwm_id = 1,
.max_brightness = 1023,
.dft_brightness = 0,
.pwm_period_ns = 1260320,
.enable_gpio = -1,
},
[1] = {
/* LCD Backlight */
.pwm_id = 2,
.max_brightness = 1023,
.dft_brightness = 512,
.pwm_period_ns = 1260320,
.enable_gpio = -1,
},
};
@ -236,6 +240,7 @@ static struct platform_device z2_backlight_devices[2] = {
};
static void __init z2_pwm_init(void)
{
pwm_add_table(z2_pwm_lookup, ARRAY_SIZE(z2_pwm_lookup));
platform_device_register(&z2_backlight_devices[0]);
platform_device_register(&z2_backlight_devices[1]);
}