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Message-ID: <9bacee6d-ab44-2975-c523-38164d016af5@quicinc.com>
Date:   Tue, 12 Apr 2022 18:18:33 +0530
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Subject: Re: [PATCH v7 2/2] arm64: dts: qcom: sc7280: add lpass lpi pin
 controller node
Content-Language: en-US
To:     Matthias Kaehlcke <mka@chromium.org>
CC:     <agross@kernel.org>, <bjorn.andersson@linaro.org>,
        <robh+dt@kernel.org>, <linux-arm-msm@vger.kernel.org>,
        <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <quic_rohkumar@quicinc.com>, <srinivas.kandagatla@linaro.org>,
        <dianders@chromium.org>, <swboyd@chromium.org>,
        <judyhsiao@chromium.org>,
        Venkata Prasad Potturu <quic_potturu@quicinc.com>
References: <1649685184-8448-1-git-send-email-quic_srivasam@quicinc.com>
 <1649685184-8448-3-git-send-email-quic_srivasam@quicinc.com>
 <YlSCWC47tITuW/BZ@google.com>
From:   Srinivasa Rao Mandadapu <quic_srivasam@quicinc.com>
Organization: Qualcomm
In-Reply-To: <YlSCWC47tITuW/BZ@google.com>
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On 4/12/2022 1:02 AM, Matthias Kaehlcke wrote:
Thanks for your time Matthias!!!
> On Mon, Apr 11, 2022 at 07:23:04PM +0530, Srinivasa Rao Mandadapu wrote:
>> Add LPASS LPI pinctrl node required for Audio functionality on sc7280
>> based platforms.
>>
>> Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@quicinc.com>
>> Co-developed-by: Venkata Prasad Potturu <quic_potturu@quicinc.com>
>> Signed-off-by: Venkata Prasad Potturu <quic_potturu@quicinc.com>
>> ---
>>   arch/arm64/boot/dts/qcom/sc7280-idp.dtsi |  84 ++++++++++++++++++++++++
>>   arch/arm64/boot/dts/qcom/sc7280.dtsi     | 107 +++++++++++++++++++++++++++++++
>>   2 files changed, 191 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi b/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
>> index 4ba2274..ea751dc 100644
>> --- a/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
>> @@ -238,6 +238,90 @@
>>   	modem-init;
>>   };
>>   
>> +&dmic01 {
> Shouldn't these nodes be in the PINCTRL section at their respective
> positions in alphabetical order?

These are not part of tlmm pin control section. These are part of 
lpass_tlmm section.

In your previous comment you asked to remove &lpass_tlmm. Hence brought out.

>
> nit: since you are keeping the groups the group names are a bit generic IMO.
> e.g. it is fairly obvious that 'dmic01_clk' refers to a clock pin, however
> just 'dmic01' is a bit vague. You could consider adding the prefix 'lpass_'
> to the group names for more clarity.
as dmic01 has both clk and data section, I don't think keeping clk is 
appropriate here.
>
>> +	clk {
>> +		drive-strength = <8>;
>> +	};
>> +};
>> +
>> +&dmic01_sleep {
>> +	clk {
>> +		drive-strength = <2>;
>> +		bias-disable;
>> +	};
>> +
>> +	data {
>> +		pull-down;
>> +	};
>> +};
>> +
>> +&dmic23 {
>> +	clk {
>> +		drive-strength = <8>;
>> +	};
>> +};
>> +
>> +&dmic23_sleep {
>> +	clk {
>> +		drive-strength = <2>;
>> +		bias-disable;
>> +	};
>> +
>> +	data {
>> +		pull-down;
>> +	};
>> +};
>> +
>> +&rx_swr {
>> +	clk {
>> +		drive-strength = <2>;
>> +		slew-rate = <1>;
>> +		bias-disable;
>> +	};
>> +
>> +	data {
>> +		drive-strength = <2>;
>> +		slew-rate = <1>;
>> +		bias-bus-hold;
>> +	};
>> +};
>> +
>> +&rx_swr_sleep {
>> +	clk {
>> +		drive-strength = <2>;
>> +		bias-pull-down;
>> +	};
>> +
>> +	data {
>> +		drive-strength = <2>;
>> +		bias-pull-down;
>> +	};
>> +};
>> +
>> +&tx_swr {
>> +	clk {
>> +		drive-strength = <2>;
>> +		slew-rate = <1>;
>> +		bias-disable;
>> +	};
>> +
>> +	data {
>> +		slew-rate = <1>;
>> +		bias-bus-hold;
>> +	};
>> +};
>> +
>> +&tx_swr_sleep {
>> +	clk {
>> +		drive-strength = <2>;
>> +		bias-pull-down;
>> +	};
>> +
>> +	data {
>> +		bias-bus-hold;
>> +	};
>> +};
>> +
>>   &pcie1 {
>>   	status = "okay";
>>   	perst-gpio = <&tlmm 2 GPIO_ACTIVE_LOW>;
>> diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi
>> index 8099c80..c692420 100644
>> --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
>> @@ -1987,6 +1987,113 @@
>>   			qcom,bcm-voters = <&apps_bcm_voter>;
>>   		};
>>   
>> +		lpass_tlmm: pinctrl@33c0000 {
>> +			compatible = "qcom,sc7280-lpass-lpi-pinctrl";
>> +			reg = <0 0x033c0000 0x0 0x20000>,
>> +				<0 0x03550000 0x0 0x10000>;
>> +			gpio-controller;
>> +			#gpio-cells = <2>;
>> +			gpio-ranges = <&lpass_tlmm 0 0 15>;
>> +
>> +			#clock-cells = <1>;
>> +
>> +			dmic01: dmic01 {
>> +				clk {
>> +					pins = "gpio6";
>  From the schematics I interpret that the LPASS GPIOs 0-9 are mapped to the
> SC7280 GPIOs 144-153. Is that correct?
Yes. But we refer with GPIOs 0-9 in driver.
>
>> +					function = "dmic1_clk";
>> +				};
>> +
>> +				data {
>> +					pins = "gpio7";
>> +					function = "dmic1_data";
>> +				};
>> +			};
>> +
>> +			dmic01_sleep: dmic01-sleep {
>> +				clk {
>> +					pins = "gpio6";
>> +					function = "dmic1_clk";
>> +				};
>> +
>> +				data {
>> +					pins = "gpio7";
>> +					function = "dmic1_data";
>> +				};
>> +			};
>> +
>> +			dmic23: dmic23 {
>> +				clk {
>> +					pins = "gpio8";
>> +					function = "dmic2_clk";
>> +				};
>> +
>> +				data {
>> +					pins = "gpio9";
>> +					function = "dmic2_data";
>> +				};
>> +			};
>> +
>> +			dmic23_sleep: dmic23_sleep {
> s/dmic23_sleep/dmic23-sleep/ for the node name.
Okay.
>
>> +				clk {
>> +					pins = "gpio8";
>> +					function = "dmic2_clk";
>> +				};
>> +
>> +				data {
>> +					pins = "gpio9";
>> +					function = "dmic2_data";
>> +				};
>> +			};
>> +
>> +			rx_swr: rx-swr {
>> +				clk {
>> +					pins = "gpio3";
>> +					function = "swr_rx_clk";
>> +				};
>> +
>> +				data {
>> +					pins = "gpio4", "gpio5";
>> +					function = "swr_rx_data";
>> +				};
>> +			};
>> +
>> +			rx_swr_sleep: rx-swr-sleep {
>> +				clk {
>> +					pins = "gpio3";
>> +					function = "swr_rx_clk";
>> +				};
>> +
>> +				data {
>> +					pins = "gpio4", "gpio5";
>> +					function = "swr_rx_data";
>> +				};
>> +			};
>> +
>> +			tx_swr: tx-swr {
>> +				clk {
>> +					pins = "gpio0";
>> +					function = "swr_tx_clk";
>> +				};
>> +
>> +				data {
>> +					pins = "gpio1", "gpio2", "gpio14";
>> +					function = "swr_tx_data";
>> +				};
>> +			};
>> +
>> +			tx_swr_sleep: tx-swr-sleep {
>> +				clk {
>> +					pins = "gpio0";
>> +					function = "swr_tx_clk";
>> +				};
>> +
>> +				data {
>> +					pins = "gpio1", "gpio2", "gpio14";
>> +					function = "swr_tx_data";
>> +				};
>> +			};
>> +		};
>> +
>>   		gpu: gpu@3d00000 {
>>   			compatible = "qcom,adreno-635.0", "qcom,adreno";
>>   			reg = <0 0x03d00000 0 0x40000>,
>> -- 
>> 2.7.4
>>