linux-kernel - Re: [PATCH 4/5] arm64: dts: qcom: ipq9574: Add SPI nand support

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Message-ID: <3e1e56dc-adb6-e4ec-b99b-688c707ddf0a@quicinc.com>
Date: Tue, 20 Feb 2024 18:01:38 +0530
From: Md Sadre Alam <quic_mdalam@...cinc.com>
To: Kathiravan Thirumoorthy <quic_kathirav@...cinc.com>,
        <andersson@...nel.org>, <konrad.dybcio@...aro.org>,
        <broonie@...nel.org>, <robh@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <miquel.raynal@...tlin.com>, <richard@....at>, <vigneshr@...com>,
        <manivannan.sadhasivam@...aro.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-spi@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-mtd@...ts.infradead.org>
CC: <quic_srichara@...cinc.com>, <quic_varada@...cinc.com>
Subject: Re: [PATCH 4/5] arm64: dts: qcom: ipq9574: Add SPI nand support



On 2/16/2024 9:10 PM, Kathiravan Thirumoorthy wrote:
> 
> 
> On 2/15/2024 7:18 PM, Md Sadre Alam wrote:
>> Add SPI NAND support for ipq9574 SoC.
>>
>> Signed-off-by: Md Sadre Alam <quic_mdalam@...cinc.com>
>> ---
>>   .../boot/dts/qcom/ipq9574-rdp-common.dtsi     | 43 +++++++++++++++++++
>>   arch/arm64/boot/dts/qcom/ipq9574.dtsi         | 27 ++++++++++++
>>   2 files changed, 70 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/ipq9574-rdp-common.dtsi b/arch/arm64/boot/dts/qcom/ipq9574-rdp-common.dtsi
>> index 91e104b0f865..5b54a027fa5d 100644
>> --- a/arch/arm64/boot/dts/qcom/ipq9574-rdp-common.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/ipq9574-rdp-common.dtsi
>> @@ -139,6 +139,49 @@ gpio_leds_default: gpio-leds-default-state {
>>           drive-strength = <8>;
>>           bias-pull-up;
>>       };
>> +
>> +    qpic_snand_default_state: qpic-snand-default-state {
>> +        clock-pins {
>> +            pins = "gpio5";
>> +            function = "qspi_clk";
>> +            drive-strength = <8>;
>> +            bias-disable;
>> +        };
>> +
>> +        cs-pins {
>> +            pins = "gpio4";
>> +            function = "qspi_cs";
>> +            drive-strength = <8>;
>> +            bias-disable;
>> +        };
>> +
>> +        data-pins {
>> +            pins = "gpio0", "gpio1", "gpio2";
> 
> 
> As per the pinctrl driver[1], there are 4 data pins.
> 
> [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/pinctrl/qcom/pinctrl-ipq9574.c#n296

   Will fix in next patch.
> 
> 
>> +            function = "qspi_data";
>> +            drive-strength = <8>;
>> +            bias-disable;
>> +        };
>> +    };
>> +};
>> +
>> +&qpic_bam {
>> +    status = "okay";
>> +};
>> +
>> +&qpic_nand {
>> +    pinctrl-0 = <&qpic_snand_default_state>;
>> +    pinctrl-names = "default";
>> +    status = "okay";
>> +
>> +    flash@0 {
>> +        compatible = "spi-nand";
>> +        reg = <0>;
>> +        #address-cells = <1>;
>> +        #size-cells = <1>;
>> +        nand-ecc-engine = <&qpic_nand>;
>> +        nand-ecc-strength = <4>;
>> +        nand-ecc-step-size = <512>;
>> +    };
>>   };
>>   &usb_0_dwc3 {
>> diff --git a/arch/arm64/boot/dts/qcom/ipq9574.dtsi b/arch/arm64/boot/dts/qcom/ipq9574.dtsi
>> index 7f2e5cbf3bbb..d963dd2035dd 100644
>> --- a/arch/arm64/boot/dts/qcom/ipq9574.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/ipq9574.dtsi
>> @@ -319,6 +319,33 @@ tcsr: syscon@...7000 {
>>               reg = <0x01937000 0x21000>;
>>           };
>> +        qpic_bam: dma-controller@...4000 {
> 
> 
> Nodes should be ordered by unit address in ascending order. So please move these nodes to the right place.
  Ok
> 
> 
>> +            compatible = "qcom,bam-v1.7.0";
>> +            reg = <0x7984000 0x1c000>;
> 
> 
> address should be padded to 8 bytes.
Ok
> 
>> +            interrupts = <GIC_SPI 146 IRQ_TYPE_LEVEL_HIGH>;
>> +            clocks = <&gcc GCC_QPIC_AHB_CLK>;
>> +            clock-names = "bam_clk";
>> +            #dma-cells = <1>;
>> +            qcom,ee = <0>;
>> +            status = "disabled";
>> +        };
>> +
>> +        qpic_nand: spi@...0000 {
>> +            compatible = "qcom,ipq9574-snand";
>> +            reg = <0x79b0000 0x10000>;
> 
> 
> Ditto..
Ok
> 
>> +            #address-cells = <1>;
>> +            #size-cells = <0>;
>> +            clocks = <&gcc GCC_QPIC_CLK>,
>> +            <&gcc GCC_QPIC_AHB_CLK>,
>> +            <&gcc GCC_QPIC_IO_MACRO_CLK>;
> 
> 
> Fix the alignment.
Ok
> 
>> +            clock-names = "core", "aon", "iom";
>> +            dmas = <&qpic_bam 0>,
>> +                <&qpic_bam 1>,
>> +                <&qpic_bam 2>;
> 
> 
> Here as well.
Ok
> 
> 
>> +            dma-names = "tx", "rx", "cmd";
>> +            status = "disabled";
>> +        };
>> +
>>           sdhc_1: mmc@...4000 {
>>               compatible = "qcom,ipq9574-sdhci", "qcom,sdhci-msm-v5";
>>               reg = <0x07804000 0x1000>,