linux-kernel - Re: [PATCH v2 4/9] arm64: dts: qcom: ipq5424: Add QPIC SPI NAND controller support

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Message-ID: <c7848ee9-dc00-48c1-a9b9-a0650238e3a1@oss.qualcomm.com>
Date: Wed, 8 Oct 2025 14:30:12 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Md Sadre Alam <quic_mdalam@...cinc.com>, broonie@...nel.org,
        robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org,
        andersson@...nel.org, konradybcio@...nel.org, vkoul@...nel.org,
        linux-arm-msm@...r.kernel.org, linux-spi@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        dmaengine@...r.kernel.org
Cc: quic_varada@...cinc.com
Subject: Re: [PATCH v2 4/9] arm64: dts: qcom: ipq5424: Add QPIC SPI NAND
 controller support

On 10/8/25 11:04 AM, Md Sadre Alam wrote:
> Add device tree nodes for QPIC SPI NAND flash controller support
> on IPQ5424 SoC.
> 
> The IPQ5424 SoC includes a QPIC controller that supports SPI NAND flash
> devices with hardware ECC capabilities and DMA support through BAM
> (Bus Access Manager).
> 
> Signed-off-by: Md Sadre Alam <quic_mdalam@...cinc.com>
> ---

[...]

> +		qpic_bam: dma-controller@...4000 {
> +			compatible = "qcom,bam-v1.7.4", "qcom,bam-v1.7.0";
> +			reg = <0x0 0x07984000 0x0 0x1c000>;
> +			interrupts = <GIC_SPI 109 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,ipq5424-snand", "qcom,ipq9574-snand";
> +			reg = <0x0 0x079b0000 0x0 0x10000>;
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +			clocks = <&gcc GCC_QPIC_CLK>,
> +				 <&gcc GCC_QPIC_AHB_CLK>,
> +				 <&gcc GCC_QPIC_IO_MACRO_CLK>;
> +			clock-names = "core", "aon", "iom";

1 a line, please, also below

> +			dmas = <&qpic_bam 0>,
> +			       <&qpic_bam 1>,
> +			       <&qpic_bam 2>;
> +			dma-names = "tx", "rx", "cmd";
> +			status = "disabled";

Is there anything preventing us from enabling both these nodes by
default on all boards (maybe secure configuration or required
regulators)?

Konrad