linux-kernel - Re: [PATCH 06/24] leds: sc27xx-blt: Use led_compose

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Date:   Wed, 7 Nov 2018 15:22:45 +0800
From:   Baolin Wang <baolin.wang@...aro.org>
To:     Jacek Anaszewski <jacek.anaszewski@...il.com>
Cc:     Linux LED Subsystem <linux-leds@...r.kernel.org>,
        DTML <devicetree@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>, Pavel Machek <pavel@....cz>,
        Rob Herring <robh@...nel.org>,
        Xiaotong Lu <xiaotong.lu@...eadtrum.com>
Subject: Re: [PATCH 06/24] leds: sc27xx-blt: Use led_compose_name()

Hi Jacek,

On 7 November 2018 at 06:07, Jacek Anaszewski
<jacek.anaszewski@...il.com> wrote:
> Switch to using generic LED support for composing LED class
> device name.
>
> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@...il.com>
> Cc: Xiaotong Lu <xiaotong.lu@...eadtrum.com>
> Cc: Baolin Wang <baolin.wang@...aro.org>

Thanks for simplifying the code, it can work well for SC27XX LED.
Tested-by: Baolin Wang <baolin.wang@...aro.org>

> ---
>  drivers/leds/leds-sc27xx-bltc.c | 23 ++++++++++-------------
>  1 file changed, 10 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/leds/leds-sc27xx-bltc.c b/drivers/leds/leds-sc27xx-bltc.c
> index 9d9b7aa..9fe7cb1 100644
> --- a/drivers/leds/leds-sc27xx-bltc.c
> +++ b/drivers/leds/leds-sc27xx-bltc.c
> @@ -6,7 +6,6 @@
>  #include <linux/of.h>
>  #include <linux/platform_device.h>
>  #include <linux/regmap.h>
> -#include <uapi/linux/uleds.h>
>
>  /* PMIC global control register definition */
>  #define SC27XX_MODULE_EN0      0xc08
> @@ -36,7 +35,7 @@
>  #define SC27XX_LEDS_MAX                3
>
>  struct sc27xx_led {
> -       char name[LED_MAX_NAME_SIZE];
> +       struct fwnode_handle *fwnode;
>         struct led_classdev ldev;
>         struct sc27xx_led_priv *priv;
>         u8 line;
> @@ -132,16 +131,22 @@ static int sc27xx_led_register(struct device *dev, struct sc27xx_led_priv *priv)
>
>         for (i = 0; i < SC27XX_LEDS_MAX; i++) {
>                 struct sc27xx_led *led = &priv->leds[i];
> +               struct led_init_data init_data = { led->fwnode };
>
>                 if (!led->active)
>                         continue;
>
> +               err = led_compose_name(led->fwnode, "sc27xx", ":",
> +                                      init_data.name);
> +               if (err)
> +                       return err;
> +
>                 led->line = i;
>                 led->priv = priv;
> -               led->ldev.name = led->name;
>                 led->ldev.brightness_set_blocking = sc27xx_led_set;
>
> -               err = devm_led_classdev_register(dev, &led->ldev);
> +               err = devm_led_classdev_register_ext(dev, &led->ldev,
> +                                                    &init_data);
>                 if (err)
>                         return err;
>         }
> @@ -154,7 +159,6 @@ static int sc27xx_led_probe(struct platform_device *pdev)
>         struct device *dev = &pdev->dev;
>         struct device_node *np = dev->of_node, *child;
>         struct sc27xx_led_priv *priv;
> -       const char *str;
>         u32 base, count, reg;
>         int err;
>
> @@ -196,15 +200,8 @@ static int sc27xx_led_probe(struct platform_device *pdev)
>                         return -EINVAL;
>                 }
>
> +               priv->leds[reg].fwnode = of_fwnode_handle(child);
>                 priv->leds[reg].active = true;
> -
> -               err = of_property_read_string(child, "label", &str);
> -               if (err)
> -                       snprintf(priv->leds[reg].name, LED_MAX_NAME_SIZE,
> -                                "sc27xx::");
> -               else
> -                       snprintf(priv->leds[reg].name, LED_MAX_NAME_SIZE,
> -                                "sc27xx:%s", str);
>         }
>
>         err = sc27xx_led_register(dev, priv);
> --
> 2.1.4
>



-- 
Baolin Wang
Best Regards