2015-04-01 04:07:37

by Joe Perches

Subject: Re: [PATCH v5 3/3] leds: Add ktd2692 flash LED driver

On Wed, 2015-04-01 at 12:58 +0900, Ingi Kim wrote:
> This patch adds a driver to support the ktd2692 flash LEDs.
> ktd2692 can control flash current by ExpressWire interface.

trivia:

> diff --git a/drivers/leds/leds-ktd2692.c b/drivers/leds/leds-ktd2692.c
[]
> +static void ktd2692_brightness_set(struct ktd2692_context *led,
> + enum led_brightness brightness)
> +{
> + mutex_lock(&led->lock);
> +
> + if (brightness == LED_OFF) {
> + led->mode = KTD2692_MODE_DISABLE;
> + gpio_set_value(led->aux_gpio, KTD2692_LOW);
> + goto out;
> + }
> +
> + ktd2692_expresswire_write(led, KTD2692_REG_MOVIE_CURRENT_BASE |
> + KTD2692_BRIGHTNESS_RANGE_255_TO_8(brightness));
> + led->mode = KTD2692_MODE_MOVIE;
> +
> +out:
> + ktd2692_expresswire_write(led, led->mode | KTD2692_REG_MODE_BASE);
> + mutex_unlock(&led->lock);
> +}

Perhaps this function would be better with if/else
without the out: label

> +static int ktd2692_led_flash_strobe_set(struct led_classdev_flash *fled_cdev,
> + bool state)
> +{
> + struct ktd2692_context *led = fled_cdev_to_led(fled_cdev);
> + struct led_flash_setting *timeout = &fled_cdev->timeout;
> + u32 flash_tm_reg;
> +
> + mutex_lock(&led->lock);
> +
> + if (state == 0) {
> + led->mode = KTD2692_MODE_DISABLE;
> + gpio_set_value(led->aux_gpio, KTD2692_LOW);
> + goto done;
> + }
> +
> + flash_tm_reg = GET_TIMEOUT_OFFSET(timeout->val, timeout->step);
> + ktd2692_expresswire_write(led, flash_tm_reg
> + | KTD2692_REG_FLASH_TIMEOUT_BASE);
> +
> + led->mode = KTD2692_MODE_FLASH;
> + gpio_set_value(led->aux_gpio, KTD2692_HIGH);
> +
> +done:
> + ktd2692_expresswire_write(led, led->mode | KTD2692_REG_MODE_BASE);

Same if/else with the done: label?

2015-04-10 06:43:07

by Ingi Kim

Subject: Re: [PATCH v5 3/3] leds: Add ktd2692 flash LED driver

Hi Joe,

Thanks for the review.

On 2015년 04월 01일 13:07, Joe Perches wrote:
> On Wed, 2015-04-01 at 12:58 +0900, Ingi Kim wrote:
>> This patch adds a driver to support the ktd2692 flash LEDs.
>> ktd2692 can control flash current by ExpressWire interface.
>
> trivia:
>
>> diff --git a/drivers/leds/leds-ktd2692.c b/drivers/leds/leds-ktd2692.c
> []
>> +static void ktd2692_brightness_set(struct ktd2692_context *led,
>> + enum led_brightness brightness)
>> +{
>> + mutex_lock(&led->lock);
>> +
>> + if (brightness == LED_OFF) {
>> + led->mode = KTD2692_MODE_DISABLE;
>> + gpio_set_value(led->aux_gpio, KTD2692_LOW);
>> + goto out;
>> + }
>> +
>> + ktd2692_expresswire_write(led, KTD2692_REG_MOVIE_CURRENT_BASE |
>> + KTD2692_BRIGHTNESS_RANGE_255_TO_8(brightness));
>> + led->mode = KTD2692_MODE_MOVIE;
>> +
>> +out:
>> + ktd2692_expresswire_write(led, led->mode | KTD2692_REG_MODE_BASE);
>> + mutex_unlock(&led->lock);
>> +}
>
> Perhaps this function would be better with if/else
> without the out: label
>
>> +static int ktd2692_led_flash_strobe_set(struct led_classdev_flash *fled_cdev,
>> + bool state)
>> +{
>> + struct ktd2692_context *led = fled_cdev_to_led(fled_cdev);
>> + struct led_flash_setting *timeout = &fled_cdev->timeout;
>> + u32 flash_tm_reg;
>> +
>> + mutex_lock(&led->lock);
>> +
>> + if (state == 0) {
>> + led->mode = KTD2692_MODE_DISABLE;
>> + gpio_set_value(led->aux_gpio, KTD2692_LOW);
>> + goto done;
>> + }
>> +
>> + flash_tm_reg = GET_TIMEOUT_OFFSET(timeout->val, timeout->step);
>> + ktd2692_expresswire_write(led, flash_tm_reg
>> + | KTD2692_REG_FLASH_TIMEOUT_BASE);
>> +
>> + led->mode = KTD2692_MODE_FLASH;
>> + gpio_set_value(led->aux_gpio, KTD2692_HIGH);
>> +
>> +done:
>> + ktd2692_expresswire_write(led, led->mode | KTD2692_REG_MODE_BASE);
>
> Same if/else with the done: label?
>
>

Sorry about late comments,
It'll be pushed next patch

Thank you