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authorThierry Reding <thierry.reding@gmail.com>2015-10-13 05:04:21 +0900
committerKukjin Kim <kgene@kernel.org>2015-10-13 05:04:21 +0900
commit8c78aaa6ee587bce9d913114ba2aec5d345e39ed (patch)
tree769dbb6613cb292747eb82ac0635a0a03801f534 /arch/arm/mach-s3c24xx
parent6ff33f3902c3b1c5d0db6b1e2c70b6d76fba357f (diff)
ARM: S3C24XX: Use PWM lookup table for mach-h1940
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>
Diffstat (limited to 'arch/arm/mach-s3c24xx')
-rw-r--r--arch/arm/mach-s3c24xx/mach-h1940.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/arch/arm/mach-s3c24xx/mach-h1940.c b/arch/arm/mach-s3c24xx/mach-h1940.c
index d40d4f5244c6..9f54300df4b3 100644
--- a/arch/arm/mach-s3c24xx/mach-h1940.c
+++ b/arch/arm/mach-s3c24xx/mach-h1940.c
@@ -25,6 +25,7 @@
#include <linux/gpio.h>
#include <linux/input.h>
#include <linux/gpio_keys.h>
+#include <linux/pwm.h>
#include <linux/pwm_backlight.h>
#include <linux/i2c.h>
#include <linux/leds.h>
@@ -469,6 +470,11 @@ static struct s3c24xx_mci_pdata h1940_mmc_cfg __initdata = {
.ocr_avail = MMC_VDD_32_33,
};
+static struct pwm_lookup h1940_pwm_lookup[] = {
+ PWM_LOOKUP("samsung-pwm", 0, "pwm-backlight", NULL, 36296,
+ PWM_POLARITY_NORMAL),
+};
+
static int h1940_backlight_init(struct device *dev)
{
gpio_request(S3C2410_GPB(0), "Backlight");
@@ -503,11 +509,8 @@ static void h1940_backlight_exit(struct device *dev)
static struct platform_pwm_backlight_data backlight_data = {
- .pwm_id = 0,
.max_brightness = 100,
.dft_brightness = 50,
- /* tcnt = 0x31 */
- .pwm_period_ns = 36296,
.enable_gpio = -1,
.init = h1940_backlight_init,
.notify = h1940_backlight_notify,
@@ -725,6 +728,7 @@ static void __init h1940_init(void)
gpio_request(H1940_LATCH_SD_POWER, "SD power");
gpio_direction_output(H1940_LATCH_SD_POWER, 0);
+ pwm_add_table(h1940_pwm_lookup, ARRAY_SIZE(h1940_pwm_lookup));
platform_add_devices(h1940_devices, ARRAY_SIZE(h1940_devices));
gpio_request(S3C2410_GPA(1), "Red LED blink");