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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>
This commit is contained in:
Thierry Reding 2015-10-05 10:49:50 +02:00 committed by Robert Jarzmik
parent 18999cba54
commit bfcb311744
1 changed files with 7 additions and 2 deletions
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9
arch/arm/mach-pxa/palmtc.c
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@ -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