linux-kernel - Re: [PATCH v14 3/3] leds: flash: mt6370: Add MediaTek MT6370 flashlight support

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Message-ID: <68ab0f05-e74a-e091-0109-09b57b90c652@collabora.com>
Date:   Tue, 11 Oct 2022 11:52:53 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     ChiaEn Wu <peterwu.pub@...il.com>, pavel@....cz,
        matthias.bgg@...il.com, jic23@...nel.org, lars@...afoo.de,
        andriy.shevchenko@...ux.intel.com
Cc:     chiaen_wu@...htek.com, alice_chen@...htek.com,
        cy_huang@...htek.com, linux-leds@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-iio@...r.kernel.org, szunichen@...il.com
Subject: Re: [PATCH v14 3/3] leds: flash: mt6370: Add MediaTek MT6370
 flashlight support

Il 11/10/22 06:05, ChiaEn Wu ha scritto:
> From: Alice Chen <alice_chen@...htek.com>
> 
> The MediaTek MT6370 is a highly-integrated smart power management IC,
> which includes a single cell Li-Ion/Li-Polymer switching battery
> charger, a USB Type-C & Power Delivery (PD) controller, dual Flash
> LED current sources, a RGB LED driver, a backlight WLED driver,
> a display bias driver and a general LDO for portable devices.
> 
> Add support for the MT6370 Flash LED driver. Flash LED in MT6370
> has 2 channels and support torch/strobe mode.
> 
> Signed-off-by: Alice Chen <alice_chen@...htek.com>
> Signed-off-by: ChiaEn Wu <chiaen_wu@...htek.com>
> ---
> 
> v14
> - Remove unused 'depend on OF' in Kconfig
> ---
>   drivers/leds/flash/Kconfig             |  14 +
>   drivers/leds/flash/Makefile            |   1 +
>   drivers/leds/flash/leds-mt6370-flash.c | 631 +++++++++++++++++++++++++++++++++
>   3 files changed, 646 insertions(+)
>   create mode 100644 drivers/leds/flash/leds-mt6370-flash.c
> 
> diff --git a/drivers/leds/flash/Kconfig b/drivers/leds/flash/Kconfig
> index d3eb689..0dd955c 100644
> --- a/drivers/leds/flash/Kconfig
> +++ b/drivers/leds/flash/Kconfig
> @@ -61,6 +61,20 @@ config LEDS_MT6360
>   	  Independent current sources supply for each flash LED support torch
>   	  and strobe mode.
>   
> +config LEDS_MT6370_FLASH
> +	tristate "Flash LED Support for MediaTek MT6370 PMIC"
> +	depends on LEDS_CLASS
> +	depends on LEDS_CLASS_FLASH || !LEDS_CLASS_FLASH

This dependency makes no sense, as the options in the Kconfig you're putting
this into gets parsed only `if LEDS_CLASS_FLASH`.
Please remove that.

> +	depends on V4L2_FLASH_LED_CLASS || !V4L2_FLASH_LED_CLASS

Well, if it depends on that being either y, m or n, it means that it does
not depend on that at all. Remove.

After which,
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>

> +	depends on MFD_MT6370
> +	help
> +	  Support 2 channels and torch/strobe mode.
> +	  Say Y here to enable support for
> +	  MT6370_FLASH_LED device.
> +
> +	  This driver can also be built as a module. If so, the module
> +	  will be called "leds-mt6370-flash".
> +
>   config LEDS_RT4505
>   	tristate "LED support for RT4505 flashlight controller"
>   	depends on I2C && OF