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SubjectRe: [PATCH 11/25] leds: lp8860: Use led_compose_name()
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On 3/10/19 1:28 PM, Jacek Anaszewski wrote:
> Switch to using generic LED support for composing LED class
> device name.
>
> While at it, avoid iterating through available child of nodes
> in favor of obtaining single expected child node using single
> call to of_get_next_available_child().
>
> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
> Cc: Dan Murphy <dmurphy@ti.com>
> ---
> drivers/leds/leds-lp8860.c | 38 +++++++++++++++++++-------------------
> 1 file changed, 19 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/leds/leds-lp8860.c b/drivers/leds/leds-lp8860.c
> index 39c72a908f3b..7c12ccdc1f2f 100644
> --- a/drivers/leds/leds-lp8860.c
> +++ b/drivers/leds/leds-lp8860.c
> @@ -22,7 +22,6 @@
> #include <linux/of_gpio.h>
> #include <linux/gpio/consumer.h>
> #include <linux/slab.h>
> -#include <uapi/linux/uleds.h>
>
> #define LP8860_DISP_CL1_BRT_MSB 0x00
> #define LP8860_DISP_CL1_BRT_LSB 0x01
> @@ -87,6 +86,8 @@
>
> #define LP8860_CLEAR_FAULTS 0x01
>
> +#define LP8860_NAME "lp8860"
> +
> /**
> * struct lp8860_led -
> * @lock - Lock for reading/writing the device
> @@ -96,7 +97,6 @@
> * @eeprom_regmap - EEPROM register map
> * @enable_gpio - VDDIO/EN gpio to enable communication interface
> * @regulator - LED supply regulator pointer
> - * @label - LED label
> */
> struct lp8860_led {
> struct mutex lock;
> @@ -106,7 +106,6 @@ struct lp8860_led {
> struct regmap *eeprom_regmap;
> struct gpio_desc *enable_gpio;
> struct regulator *regulator;
> - char label[LED_MAX_NAME_SIZE];
> };
>
> struct lp8860_eeprom_reg {
> @@ -387,25 +386,26 @@ static int lp8860_probe(struct i2c_client *client,
> struct lp8860_led *led;
> struct device_node *np = client->dev.of_node;
> struct device_node *child_node;
> - const char *name;
> + struct led_init_data init_data;
>
> led = devm_kzalloc(&client->dev, sizeof(*led), GFP_KERNEL);
> if (!led)
> return -ENOMEM;
>
> - for_each_available_child_of_node(np, child_node) {
> - led->led_dev.default_trigger = of_get_property(child_node,
> - "linux,default-trigger",
> - NULL);
> -
> - ret = of_property_read_string(child_node, "label", &name);
> - if (!ret)
> - snprintf(led->label, sizeof(led->label), "%s:%s",
> - id->name, name);
> - else
> - snprintf(led->label, sizeof(led->label),
> - "%s::display_cluster", id->name);
> - }
> + child_node = of_get_next_available_child(np, NULL);

Again this device has multiple outputs that can be banked or separated.

I would prefer to leave the iteration and just change the name generation.

Dan

> + if (!child_node)
> + return -EINVAL;
> +
> + init_data.fwnode = of_fwnode_handle(child_node),
> +
> + led->led_dev.default_trigger = of_get_property(child_node,
> + "linux,default-trigger",
> + NULL);
> +
> + ret = led_compose_name(init_data.fwnode, LP8860_NAME,
> + ":display_cluster", init_data.name);
> + if (ret)
> + return ret;
>
> led->enable_gpio = devm_gpiod_get_optional(&client->dev,
> "enable", GPIOD_OUT_LOW);
> @@ -420,7 +420,6 @@ static int lp8860_probe(struct i2c_client *client,
> led->regulator = NULL;
>
> led->client = client;
> - led->led_dev.name = led->label;
> led->led_dev.brightness_set_blocking = lp8860_brightness_set;
>
> mutex_init(&led->lock);
> @@ -447,7 +446,8 @@ static int lp8860_probe(struct i2c_client *client,
> if (ret)
> return ret;
>
> - ret = devm_led_classdev_register(&client->dev, &led->led_dev);
> + ret = devm_led_classdev_register_ext(&client->dev, &led->led_dev,
> + &init_data);
> if (ret) {
> dev_err(&client->dev, "led register err: %d\n", ret);
> return ret;
>


--
------------------
Dan Murphy

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