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ARM: S3C64XX: Use PWM lookup table for mach-hmt 

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.

Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
This commit is contained in:
Thierry Reding 2015-10-13 05:04:22 +09:00 committed by Kukjin Kim
parent 799fbf8cee
commit dd39be623e
1 changed files with 7 additions and 2 deletions
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9
arch/arm/mach-s3c64xx/mach-hmt.c
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@ -19,6 +19,7 @@
#include <linux/gpio.h> #include <linux/gpio.h>
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/leds.h> #include <linux/leds.h>
#include <linux/pwm.h>
#include <linux/pwm_backlight.h> #include <linux/pwm_backlight.h>
#include <linux/mtd/mtd.h> #include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h> #include <linux/mtd/partitions.h>
@ -73,6 +74,11 @@ static struct s3c2410_uartcfg hmt_uartcfgs[] __initdata = {
}, },
}; };
static struct pwm_lookup hmt_pwm_lookup[] = {
PWM_LOOKUP("samsung-pwm", 1, "pwm-backlight.0", NULL,
1000000000 / (100 * 256 * 20), PWM_POLARITY_NORMAL),
};
static int hmt_bl_init(struct device *dev) static int hmt_bl_init(struct device *dev)
{ {
int ret; int ret;
@ -110,10 +116,8 @@ static void hmt_bl_exit(struct device *dev)
} }
static struct platform_pwm_backlight_data hmt_backlight_data = { static struct platform_pwm_backlight_data hmt_backlight_data = {
.pwm_id = 1,
.max_brightness = 100 * 256, .max_brightness = 100 * 256,
.dft_brightness = 40 * 256, .dft_brightness = 40 * 256,
.pwm_period_ns = 1000000000 / (100 * 256 * 20),
.enable_gpio = -1, .enable_gpio = -1,
.init = hmt_bl_init, .init = hmt_bl_init,
.notify = hmt_bl_notify, .notify = hmt_bl_notify,
@ -268,6 +272,7 @@ static void __init hmt_machine_init(void)
gpio_request(S3C64XX_GPF(13), "usb power"); gpio_request(S3C64XX_GPF(13), "usb power");
gpio_direction_output(S3C64XX_GPF(13), 1); gpio_direction_output(S3C64XX_GPF(13), 1);
pwm_add_table(hmt_pwm_lookup, ARRAY_SIZE(hmt_pwm_lookup));
platform_add_devices(hmt_devices, ARRAY_SIZE(hmt_devices)); platform_add_devices(hmt_devices, ARRAY_SIZE(hmt_devices));
} }