Hi Marek,
On 3/24/21 5:34 PM, Marek Behun wrote:
>> +#include <linux/err.h>
>> +#include <linux/gpio.h>
>> +#include <linux/gpio/consumer.h>
>> +#include <linux/kernel.h>
>> +#include <linux/leds.h>
>> +#include <linux/module.h>
>> +#include <linux/of.h>
>> +#include <linux/of_gpio.h>
>> +#include <linux/platform_device.h>
>> +#include <linux/property.h>
>> +#include <linux/slab.h>
> Why do you include slab.h?
Yeah, I will clean it in next commit.
>> +
>> +
>> +static void multi_gpio_led_set(struct led_classdev *led_cdev,
>> + enum led_brightness value)
>> +{
>> + struct multi_gpio_led_priv *priv;
>> + int idx;
>> +
>> + DECLARE_BITMAP(values, MAX_GPIO_NUM);
>> +
>> + priv = container_of(led_cdev, struct multi_gpio_led_priv, cdev);
>> +
>> + idx = (value - LED_OFF) * priv->nr_states / (LED_FULL + 1);
> LED_FULL / LED_OFF are deprecated, don't use them.
Then could I use just 0 (instead LED_OFF) and led_cdev->max_brightness
(instead of LED_FULL) here? The idea here is map the states defined in dts
to the full brightness range.
> +
> + priv->nr_states = ret;
> + priv->states = devm_kzalloc(dev, sizeof(*priv->states) * priv->nr_states, GFP_KERNEL);
> + if (!priv->states)
> + return -ENOMEM;
> +
> + ret = of_property_read_u8_array(node, "led-states", priv->states, priv->nr_states);
> + if (ret)
> + return ret;
> +
> + priv->cdev.max_brightness = LED_FULL;
> ???? max_brightness is not 255 (= LED_FULL). max_brightness must be
> derived from the led-states property.
Yeah, I will fix this. the max-brightness should for the whole LED,
right? So
it will at same level with led-states.
