Re: [PATCH v5 04/11] leds: led-class: Add generic [devm_]led_get()

[Lee Jones <lee@kernel.org>]

On Fri, 20 Jan 2023, Hans de Goede wrote:

> Add a generic [devm_]led_get() method which can be used on both devicetree
> and non devicetree platforms to get a LED classdev associated with
> a specific function on a specific device, e.g. the privacy LED associated
> with a specific camera sensor.
> 
> Note unlike of_led_get() this takes a string describing the function
> rather then an index. This is done because e.g. camera sensors might
> have a privacy LED, or a flash LED, or both and using an index
> approach leaves it unclear what the function of index 0 is if there is
> only 1 LED.
> 
> This uses a lookup-table mechanism for non devicetree platforms.
> This allows the platform code to map specific LED class_dev-s to a specific
> device,function combinations this way.
> 
> For devicetree platforms getting the LED by function-name could be made
> to work using the standard devicetree pattern of adding a -names string
> array to map names to the indexes.
> 
> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
> ---
> Changes in v5:
> - Rename lookup-table names to match those from the gpio and reset lookups:
>   s/led_name/provider/
>   s/consumer_dev_name/dev_id/
>   s/consumer_function/con_id/
> 
> Changes in v4:
> - Split out support for led_get() devicetree name-based lookup support
>   into a separate RFC patch as there currently are no users for this
> - Use kstrdup_const() / kfree_const() for the led_name
> ---
>  drivers/leds/led-class.c | 84 ++++++++++++++++++++++++++++++++++++++++
>  include/linux/leds.h     | 21 ++++++++++
>  2 files changed, 105 insertions(+)

Applied, thanks

-- 
Lee Jones [李琼斯]