linux-kernel - Re: [PATCH v1 17/25] arm64: dts: colibri-imx8x: eval: Add spi-to-can

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Date:   Wed, 8 Mar 2023 14:00:27 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Philippe Schenker <dev@...henker.ch>, devicetree@...r.kernel.org,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>
Cc:     NXP Linux Team <linux-imx@....com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Frank Rowand <frowand.list@...il.com>,
        linux-arm-kernel@...ts.infradead.org,
        Fabio Estevam <festevam@...il.com>,
        Philippe Schenker <philippe.schenker@...adex.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 17/25] arm64: dts: colibri-imx8x: eval: Add spi-to-can

On 08/03/2023 13:52, Philippe Schenker wrote:
> From: Philippe Schenker <philippe.schenker@...adex.com>
> 
> Add mcp2515 spi-to-can to &lpspi2.
> 
> Signed-off-by: Philippe Schenker <philippe.schenker@...adex.com>
> ---
> 
>  .../dts/freescale/imx8x-colibri-eval-v3.dtsi  | 19 +++++++++++++++++++
>  1 file changed, 19 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8x-colibri-eval-v3.dtsi b/arch/arm64/boot/dts/freescale/imx8x-colibri-eval-v3.dtsi
> index 625d2caaf5d1..e7e3cf462408 100644
> --- a/arch/arm64/boot/dts/freescale/imx8x-colibri-eval-v3.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8x-colibri-eval-v3.dtsi

There is no such file.

> @@ -11,6 +11,13 @@ aliases {
>  		rtc1 = &rtc;
>  	};
>  
> +	/* fixed crystal dedicated to mcp25xx */
> +	clk16m: clock-16mhz-fixed {

Drop "fixed".

> +		compatible = "fixed-clock";
> +		#clock-cells = <0>;
> +		clock-frequency = <16000000>;
> +	};
> +
>  	gpio-keys {
>  		compatible = "gpio-keys";
>  		pinctrl-names = "default";
> @@ -44,6 +51,18 @@ rtc_i2c: rtc@68 {
>  /* Colibri SPI */
>  &lpspi2 {
>  	status = "okay";
> +
> +	mcp2515: can@0 {
> +		compatible = "microchip,mcp2515";
> +		reg = <0>;
> +		interrupt-parent = <&lsio_gpio3>;
> +		interrupts = <13 IRQ_TYPE_EDGE_FALLING>;
> +		pinctrl-0 = <&pinctrl_can_int>;
> +		pinctrl-names = "default";
> +		clocks = <&clk16m>;

You just sorted all nodes in previous patches and add something
unsorted? What is then the style of order? Random name?

> +		spi-max-frequency = <10000000>;
> +		status = "okay";

Why do you need it?

> +	};
>  };
>  
>  /* Colibri UART_B */

Best regards,
Krzysztof