linux-kernel - Re: [PATCH 6/7] ARM: dts: exynos: k3g: Document the devices which are not supported

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Message-ID: <e99c428f-0d70-cfee-dcc1-d82b2d270390@linaro.org>
Date:   Wed, 19 Jul 2023 11:18:02 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Markuss Broks <markuss.broks@...il.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/7] ARM: dts: exynos: k3g: Document the devices which are
 not supported

On 17/07/2023 00:05, Markuss Broks wrote:
> Add placeholders for peripherals which we currently lack support for.
> This includes Maxim MAX86900 heart rate sensor and oximeter, which
> seems to be similar to other health sensors by Maxim, but it is not
> fully compatible; STM32F401 MCU which acts like a sensor hub,
> which can be flashed and controlled via the SPI bus, for which I made
> some simple firmware to check if it's possible to program with custom
> code, and it appears you can do so, but at the moment kernel lacks
> the APIs to either control sensors directly through the MCU or any
> standards for a sensor hub, so it's laid off; WM5110 audio codec which
> fails to communicate for some reason.
> 
> Signed-off-by: Markuss Broks <markuss.broks@...il.com>
> ---
>  arch/arm/boot/dts/exynos5422-samsung-k3g.dts | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/exynos5422-samsung-k3g.dts b/arch/arm/boot/dts/exynos5422-samsung-k3g.dts
> index 813dbf0438de..e019b630db94 100644
> --- a/arch/arm/boot/dts/exynos5422-samsung-k3g.dts
> +++ b/arch/arm/boot/dts/exynos5422-samsung-k3g.dts
> @@ -743,6 +743,24 @@ rmi4-f12@12 {
>  	};
>  };
>  
> +&i2c_3 {
> +	status = "okay";
> +
> +	/* Maxim MAX86900 heart rate sensor and oximeter on address 0x57 */
> +};
> +
> +&spi_0 {

The node overrides/extends are ordered by name.



Best regards,
Krzysztof