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backlight: atmel-pwm-bl: refactor gpio_on handling

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Add helper function to control the gpio_on signal.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Acked-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Johan Hovold 2013-11-12 15:09:45 -08:00 • committed by Linus Torvalds
parent 5ada4550e8
commit 81b62db56d
1 changed files with 11 additions and 12 deletions
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23
drivers/video/backlight/atmel-pwm-bl.c
View file

@ -26,6 +26,14 @@ struct atmel_pwm_bl {
int gpio_on; int gpio_on;
}; };
static void atmel_pwm_bl_set_gpio_on(struct atmel_pwm_bl *pwmbl, int on)
{
if (!gpio_is_valid(pwmbl->gpio_on))
return;
gpio_set_value(pwmbl->gpio_on, on ^ pwmbl->pdata->on_active_low);
}
static int atmel_pwm_bl_set_intensity(struct backlight_device *bd) static int atmel_pwm_bl_set_intensity(struct backlight_device *bd)
{ {
struct atmel_pwm_bl *pwmbl = bl_get_data(bd); struct atmel_pwm_bl *pwmbl = bl_get_data(bd);
@ -48,19 +56,13 @@ static int atmel_pwm_bl_set_intensity(struct backlight_device *bd)
pwm_duty = pwmbl->pdata->pwm_duty_min; pwm_duty = pwmbl->pdata->pwm_duty_min;
if (!intensity) { if (!intensity) {
if (gpio_is_valid(pwmbl->gpio_on)) { atmel_pwm_bl_set_gpio_on(pwmbl, 0);
gpio_set_value(pwmbl->gpio_on,
0 ^ pwmbl->pdata->on_active_low);
}
pwm_channel_writel(&pwmbl->pwmc, PWM_CUPD, pwm_duty); pwm_channel_writel(&pwmbl->pwmc, PWM_CUPD, pwm_duty);
pwm_channel_disable(&pwmbl->pwmc); pwm_channel_disable(&pwmbl->pwmc);
} else { } else {
pwm_channel_enable(&pwmbl->pwmc); pwm_channel_enable(&pwmbl->pwmc);
pwm_channel_writel(&pwmbl->pwmc, PWM_CUPD, pwm_duty); pwm_channel_writel(&pwmbl->pwmc, PWM_CUPD, pwm_duty);
if (gpio_is_valid(pwmbl->gpio_on)) { atmel_pwm_bl_set_gpio_on(pwmbl, 1);
gpio_set_value(pwmbl->gpio_on,
1 ^ pwmbl->pdata->on_active_low);
}
} }
return 0; return 0;
@ -196,10 +198,7 @@ static int atmel_pwm_bl_remove(struct platform_device *pdev)
{ {
struct atmel_pwm_bl *pwmbl = platform_get_drvdata(pdev); struct atmel_pwm_bl *pwmbl = platform_get_drvdata(pdev);
if (gpio_is_valid(pwmbl->gpio_on)) { atmel_pwm_bl_set_gpio_on(pwmbl, 0);
gpio_set_value(pwmbl->gpio_on,
0 ^ pwmbl->pdata->on_active_low);
}
pwm_channel_disable(&pwmbl->pwmc); pwm_channel_disable(&pwmbl->pwmc);
pwm_channel_free(&pwmbl->pwmc); pwm_channel_free(&pwmbl->pwmc);