linux-kernel - Re: [PATCH v4] arm64: dts: ti: k3-j721s2: Add support for ADC nodes

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Message-ID: <9e794431-cfa3-fed3-48e6-3c3ddf36ed92@ti.com>
Date:   Tue, 14 Mar 2023 15:11:44 +0530
From:   Bhavya Kapoor <b-kapoor@...com>
To:     Nishanth Menon <nm@...com>
CC:     <devicetree@...r.kernel.org>, <robh+dt@...nel.org>,
        <vigneshr@...com>, <kristo@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4] arm64: dts: ti: k3-j721s2: Add support for ADC nodes


On 13/03/23 22:35, Nishanth Menon wrote:
> On 16:58-20230313, Bhavya Kapoor wrote:
>> J721s2 has two instances of 8 channel ADCs in MCU domain. Add DT nodes
>> for both instances of 8 channel ADCs for J721s2 SoC.
> Drop the second line..
Sure , i will modify the commit message in next patch.
>
>> Signed-off-by: Bhavya Kapoor <b-kapoor@...com>
>> ---
>>
>> Changelog v3->v4:
>> - add leading zeroes to reg address to match existing convention
>> - change clock names for adc to 'fck'
>> - remove spaces from start of line
> Please provide links to previous versions of the patches.
>
>>   .../dts/ti/k3-j721s2-common-proc-board.dts    | 14 +++++++
>>   .../boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi     | 40 +++++++++++++++++++
>>   2 files changed, 54 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts b/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts
>> index a7aa6cf08acd..3bc4f28c809f 100644
>> --- a/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts
>> +++ b/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts
>> @@ -309,3 +309,17 @@ &mcu_mcan1 {
>>   	pinctrl-0 = <&mcu_mcan1_pins_default>;
>>   	phys = <&transceiver2>;
>>   };
>> +
>> +&tscadc0 {
>> +	status = "okay";
>> +	adc {
>> +		ti,adc-channels = <0 1 2 3 4 5 6 7>;
>> +	};
>> +};
>> +
>> +&tscadc1 {
>> +	status = "okay";
> Curious: ADCs work without pinmux? any test log?
ADC work without pinmux. Will send test log in next patch.
>
>> +	adc {
>> +		ti,adc-channels = <0 1 2 3 4 5 6 7>;
>> +	};
>> +};
>> diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi
>> index 0af242aa9816..5da5f0cf7009 100644
>> --- a/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi
>> +++ b/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi
>> @@ -306,4 +306,44 @@ cpts@...00 {
>>   			ti,cpts-periodic-outputs = <2>;
>>   		};
>>   	};
>> +
>> +	tscadc0: tscadc@...00000 {
>> +		compatible = "ti,am3359-tscadc";
>> +		reg = <0x00 0x40200000 0x00 0x1000>;
>> +		interrupts = <GIC_SPI 860 IRQ_TYPE_LEVEL_HIGH>;
>> +		power-domains = <&k3_pds 0 TI_SCI_PD_EXCLUSIVE>;
>> +		clocks = <&k3_clks 0 0>;
>> +		assigned-clocks = <&k3_clks 0 2>;
>> +		assigned-clock-rates = <60000000>;
>> +		clock-names = "fck";
>> +		dmas = <&main_udmap 0x7400>,
>> +			<&main_udmap 0x7401>;
>> +		dma-names = "fifo0", "fifo1";
>> +		status = "disabled";
> If it works without pinmux, why disable by default?
yea, We can keep it enabled as well
>
>> +
>> +		adc {
>> +			#io-channel-cells = <1>;
>> +			compatible = "ti,am3359-adc";
>> +		};
>> +	};
>> +
>> +	tscadc1: tscadc@...10000 {
>> +		compatible = "ti,am3359-tscadc";
>> +		reg = <0x00 0x40210000 0x00 0x1000>;
>> +		interrupts = <GIC_SPI 861 IRQ_TYPE_LEVEL_HIGH>;
>> +		power-domains = <&k3_pds 1 TI_SCI_PD_EXCLUSIVE>;
>> +		clocks = <&k3_clks 1 0>;
>> +		assigned-clocks = <&k3_clks 1 2>;
>> +		assigned-clock-rates = <60000000>;
>> +		clock-names = "fck";
>> +		dmas = <&main_udmap 0x7402>,
>> +			<&main_udmap 0x7403>;
>> +		dma-names = "fifo0", "fifo1";
>> +		status = "disabled";
>> +
>> +		adc {
>> +			#io-channel-cells = <1>;
>> +			compatible = "ti,am3359-adc";
>> +		};
>> +	};
>>   };
>> -- 
>> 2.34.1
>>