linux-kernel - Re: [PATCH v2] arm64: dts: qcom: db845c: Add support for MCP2517FD

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Date:   Thu, 21 Apr 2022 12:53:16 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        linux-arm-msm@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Manivannan Sadhasivam <mani@...nel.org>
Subject: Re: [PATCH v2] arm64: dts: qcom: db845c: Add support for MCP2517FD

On 19-04-22, 09:37, Krzysztof Kozlowski wrote:
> On 19/04/2022 06:33, Vinod Koul wrote:
> > Add support for onboard MCP2517FD SPI CAN transceiver attached to
> > SPI0 of RB3.
> > 
> > Signed-off-by: Vinod Koul <vkoul@...nel.org>
> > ---
> > Changes in v2:
> >  - add cs and pinctrl config
> >  - remove misleading comment
> > 
> >  arch/arm64/boot/dts/qcom/sdm845-db845c.dts | 33 ++++++++++++++++++++++
> >  1 file changed, 33 insertions(+)
> > 
> > diff --git a/arch/arm64/boot/dts/qcom/sdm845-db845c.dts b/arch/arm64/boot/dts/qcom/sdm845-db845c.dts
> > index 28fe45c5d516..4f4d45be93e3 100644
> > --- a/arch/arm64/boot/dts/qcom/sdm845-db845c.dts
> > +++ b/arch/arm64/boot/dts/qcom/sdm845-db845c.dts
> > @@ -28,6 +28,13 @@ chosen {
> >  		stdout-path = "serial0:115200n8";
> >  	};
> >  
> > +	/* Fixed crystal oscillator dedicated to MCP2517FD */
> > +	clk40M: can_clock {
> 
> No underscores in node names.

right, will patch up the original source as well :D

> 
> > +		compatible = "fixed-clock";
> > +		#clock-cells = <0>;
> > +		clock-frequency = <40000000>;
> > +	};
> > +
> >  	dc12v: dc12v-regulator {
> >  		compatible = "regulator-fixed";
> >  		regulator-name = "DC12V";
> > @@ -746,6 +753,24 @@ codec {
> >  	};
> >  };
> >  
> > +&spi0 {
> > +	status = "okay";
> > +	pinctrl-names = "default";
> > +	pinctrl-0 = <&qup_spi0_default>;
> > +	cs-gpios = <&tlmm 3 GPIO_ACTIVE_LOW>;
> > +
> > +	can@0 {
> > +		compatible = "microchip,mcp2517fd";
> > +		reg = <0>;
> > +		clocks = <&clk40M>;
> > +		interrupts-extended = <&tlmm 104 IRQ_TYPE_LEVEL_LOW>;
> > +		spi-max-frequency = <10000000>;
> > +		vdd-supply = <&vdc_5v>;
> > +		xceiver-supply = <&vdc_5v>;
> > +		status = "okay";
> 
> No need for status for new nodes (unless it is an extension of existing
> node?), it is okay by default.

Yep

-- 
~Vinod