linux-kernel - Re: [PATCH v1 2/2] arm64: dts: qcom: qcs6490-rb3gen2: Enable CAN bus controller

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Message-ID: <76ef0674-ba19-4d91-b243-bb338d5f9d59@oss.qualcomm.com>
Date: Fri, 9 Jan 2026 18:25:48 +0530
From: Viken Dadhaniya <viken.dadhaniya@....qualcomm.com>
To: Manivannan Sadhasivam <mani@...nel.org>
Cc: mkl@...gutronix.de, thomas.kopp@...rochip.com, mailhol@...nel.org,
        robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org,
        andersson@...nel.org, konradybcio@...nel.org,
        linux-can@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        mukesh.savaliya@....qualcomm.com, anup.kulkarni@....qualcomm.com
Subject: Re: [PATCH v1 2/2] arm64: dts: qcom: qcs6490-rb3gen2: Enable CAN bus
 controller



On 1/8/2026 10:16 PM, Manivannan Sadhasivam wrote:
> On Thu, Jan 08, 2026 at 06:22:00PM +0530, Viken Dadhaniya wrote:
>> Enable the MCP2518FD CAN controller on the QCS6490 RB3 Gen2 platform.
>> The controller is connected via SPI3 and uses a 40 MHz oscillator.
>> A GPIO hog for GPIO0 is included to configure the CAN transceiver in
>> Normal mode during boot.
>>
> 
> It'd be worth mentioning how you tested the controller.

Sure, I will include the testing details in v2. Thanks for the suggestion.

> 
> - Mani
> 
>> Signed-off-by: Viken Dadhaniya <viken.dadhaniya@....qualcomm.com>
>> ---
>>  arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts | 30 ++++++++++++++++++++
>>  1 file changed, 30 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
>> index e3d2f01881ae..f2f2925e645a 100644
>> --- a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
>> +++ b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
>> @@ -44,6 +44,14 @@ chosen {
>>  		stdout-path = "serial0:115200n8";
>>  	};
>>  
>> +	clocks {
>> +		mcp2518fd_osc: can-clk {
>> +			compatible = "fixed-clock";
>> +			clock-frequency = <40000000>;
>> +			#clock-cells = <0>;
>> +		};
>> +	};
>> +
>>  	dp-connector {
>>  		compatible = "dp-connector";
>>  		label = "DP";
>> @@ -1151,6 +1159,28 @@ platform {
>>  	};
>>  };
>>  
>> +&spi3 {
>> +	status = "okay";
>> +
>> +	can@0 {
>> +		compatible = "microchip,mcp2518fd";
>> +		reg = <0>;
>> +		interrupts-extended = <&tlmm 7 IRQ_TYPE_LEVEL_LOW>;
>> +		clocks = <&mcp2518fd_osc>;
>> +		spi-max-frequency = <10000000>;
>> +		vdd-supply = <&vreg_l11c_2p8>;
>> +		gpio-controller;
>> +		#gpio-cells = <2>;
>> +
>> +		gpio0-hog {
>> +			gpio-hog;
>> +			gpios = <0 GPIO_ACTIVE_LOW>;
>> +			output-high;
>> +			line-name = "mcp251xfd-gpio0";
>> +		};
>> +	};
>> +};
>> +
>>  &swr2 {
>>  	status = "okay";
>>  
>> -- 
>> 2.34.1
>>
>