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SubjectRe: [PATCH 13/25] leds: lm3692x: 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.
>
> Since the same device strings would be used in two places,
> then add macros LM36922_NAME and LM36922_NAME for use in
> lm3692x_probe_dt(() and lm3692x_id array.
>
> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
> Acked-by: Pavel Machek <pavel@ucw.cz>
> Cc: Dan Murphy <dmurphy@ti.com>
> ---
> drivers/leds/leds-lm3692x.c | 39 ++++++++++++++++++++-------------------
> 1 file changed, 20 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/leds/leds-lm3692x.c b/drivers/leds/leds-lm3692x.c
> index 4f413a7c5f05..9dfc0f28a9c8 100644
> --- a/drivers/leds/leds-lm3692x.c
> +++ b/drivers/leds/leds-lm3692x.c
> @@ -13,7 +13,6 @@
> #include <linux/regmap.h>
> #include <linux/regulator/consumer.h>
> #include <linux/slab.h>
> -#include <uapi/linux/uleds.h>
>
> #define LM36922_MODEL 0
> #define LM36923_MODEL 1
> @@ -95,6 +94,9 @@
> #define LM3692X_FAULT_FLAG_SHRT BIT(3)
> #define LM3692X_FAULT_FLAG_OPEN BIT(4)
>
> +#define LM36922_NAME "lm36922"
> +#define LM36923_NAME "lm36923"
> +
> /**
> * struct lm3692x_led -
> * @lock - Lock for reading/writing the device
> @@ -103,7 +105,6 @@
> * @regmap - Devices register map
> * @enable_gpio - VDDIO/EN gpio to enable communication interface
> * @regulator - LED supply regulator pointer
> - * @label - LED label
> * @led_enable - LED sync to be enabled
> * @model_id - Current device model ID enumerated
> */
> @@ -114,7 +115,6 @@ struct lm3692x_led {
> struct regmap *regmap;
> struct gpio_desc *enable_gpio;
> struct regulator *regulator;
> - char label[LED_MAX_NAME_SIZE];
> int led_enable;
> int model_id;
> };
> @@ -325,7 +325,8 @@ static int lm3692x_init(struct lm3692x_led *led)
> static int lm3692x_probe_dt(struct lm3692x_led *led)
> {
> struct fwnode_handle *child = NULL;
> - const char *name;
> + struct led_init_data init_data;
> + char *model_name;
> int ret;
>
> led->enable_gpio = devm_gpiod_get_optional(&led->client->dev,
> @@ -346,17 +347,20 @@ static int lm3692x_probe_dt(struct lm3692x_led *led)
> dev_err(&led->client->dev, "No LED Child node\n");
> return -ENODEV;
> }
> + init_data.fwnode = child;
>
> - fwnode_property_read_string(child, "linux,default-trigger",
> - &led->led_dev.default_trigger);
> + if (led->model_id == LM36922_MODEL)
> + model_name = LM36922_NAME;
> + else
> + model_name = LM36923_NAME;
>


Why do we need this change?

led->client->name should suffice here and then we do not have to #define the name at all.


> - ret = fwnode_property_read_string(child, "label", &name);
> + ret = led_compose_name(child, model_name, ":backlight_cluster",
> + init_data.name);
> if (ret)
> - snprintf(led->label, sizeof(led->label),
> - "%s::", led->client->name);
> - else
> - snprintf(led->label, sizeof(led->label),
> - "%s:%s", led->client->name, name);
> + return ret;
> +
> + fwnode_property_read_string(child, "linux,default-trigger",
> + &led->led_dev.default_trigger);
>
> ret = fwnode_property_read_u32(child, "reg", &led->led_enable);
> if (ret) {
> @@ -364,16 +368,13 @@ static int lm3692x_probe_dt(struct lm3692x_led *led)
> return ret;
> }
>
> - led->led_dev.name = led->label;
> -
> - ret = devm_led_classdev_register(&led->client->dev, &led->led_dev);
> + ret = devm_led_classdev_register_ext(&led->client->dev, &led->led_dev,
> + &init_data);
> if (ret) {
> dev_err(&led->client->dev, "led register err: %d\n", ret);
> return ret;
> }
>
> - led->led_dev.dev->of_node = to_of_node(child);
> -

Seems like an additional change here not documented.
If it is a bug fix or an enhancement probably need a separate patch.

I do know why this is removed just need tracability on the log.

Dan

> return 0;
> }
>
> @@ -439,8 +440,8 @@ static int lm3692x_remove(struct i2c_client *client)
> }
>
> static const struct i2c_device_id lm3692x_id[] = {
> - { "lm36922", LM36922_MODEL },
> - { "lm36923", LM36923_MODEL },
> + { LM36922_NAME, LM36922_MODEL },
> + { LM36923_NAME, LM36923_MODEL },
> { }
> };
> MODULE_DEVICE_TABLE(i2c, lm3692x_id);
>


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

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