linux-kernel - Re: [PATCH v4] arm64: dts: qcom: sc7180: Add WCN3990 WLAN module device node

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Date:   Tue, 28 Jan 2020 11:20:27 -0800
From:   Matthias Kaehlcke <mka@...omium.org>
To:     Rakesh Pillai <pillair@...eaurora.org>
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH v4] arm64: dts: qcom: sc7180: Add WCN3990 WLAN module
 device node

Hi Rakesh,

On Tue, Jan 28, 2020 at 04:03:37PM +0530, Rakesh Pillai wrote:
> Add device node for the ath10k SNOC platform driver probe
> and add resources required for WCN3990 on sc7180 soc.
> 
> Signed-off-by: Rakesh Pillai <pillair@...eaurora.org>
> ---
>  arch/arm64/boot/dts/qcom/sc7180-idp.dts |  5 +++++
>  arch/arm64/boot/dts/qcom/sc7180.dtsi    | 28 ++++++++++++++++++++++++++++
>  2 files changed, 33 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc7180-idp.dts b/arch/arm64/boot/dts/qcom/sc7180-idp.dts
> index 189254f..151b489 100644
> --- a/arch/arm64/boot/dts/qcom/sc7180-idp.dts
> +++ b/arch/arm64/boot/dts/qcom/sc7180-idp.dts
> @@ -248,6 +248,11 @@
>  	status = "okay";
>  };
>  
> +&wifi {
> +	status = "okay";
> +	qcom,msa-fixed-perm;
> +};
> +
>  /* PINCTRL - additions to nodes defined in sc7180.dtsi */
>  
>  &qup_i2c2_default {
> diff --git a/arch/arm64/boot/dts/qcom/sc7180.dtsi b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> index 666e9b9..7efb97f 100644
> --- a/arch/arm64/boot/dts/qcom/sc7180.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> @@ -42,6 +42,12 @@
>  			compatible = "qcom,cmd-db";
>  			no-map;
>  		};
> +
> +		wlan_fw_mem: memory@...00000 {
> +			compatible = "removed-dma-pool";
> +			no-map;
> +			reg = <0 0x93900000 0 0x200000>;
> +		};
>  	};

This part doesn't apply cleanly on qcom/for-next, looks like you have to
rebase.

>  	cpus {
> @@ -1119,6 +1125,28 @@
>  				#clock-cells = <1>;
>  			};
>  		};
> +
> +		wifi: wifi@...00000 {

You added this node at the end of the file, outside of the 'soc' node.
It should be inside the 'soc' node, the sub-nodes are ordered by address,
so (currently) this node should be inserted after 'cpufreq@...23000'.

> +			compatible = "qcom,wcn3990-wifi";
> +			reg = <0 0x18800000 0 0x800000>;
> +			reg-names = "membase";
> +			iommus = <&apps_smmu 0xC0 0x1>;

nit: the convention is to use lowercase characters for hex adresses.

> +			interrupts =
> +				<GIC_SPI 414 IRQ_TYPE_LEVEL_HIGH /* CE0 */ >,
> +				<GIC_SPI 415 IRQ_TYPE_LEVEL_HIGH /* CE1 */ >,
> +				<GIC_SPI 416 IRQ_TYPE_LEVEL_HIGH /* CE2 */ >,
> +				<GIC_SPI 417 IRQ_TYPE_LEVEL_HIGH /* CE3 */ >,
> +				<GIC_SPI 418 IRQ_TYPE_LEVEL_HIGH /* CE4 */ >,
> +				<GIC_SPI 419 IRQ_TYPE_LEVEL_HIGH /* CE5 */ >,
> +				<GIC_SPI 420 IRQ_TYPE_LEVEL_HIGH /* CE6 */ >,
> +				<GIC_SPI 421 IRQ_TYPE_LEVEL_HIGH /* CE7 */ >,
> +				<GIC_SPI 422 IRQ_TYPE_LEVEL_HIGH /* CE8 */ >,
> +				<GIC_SPI 423 IRQ_TYPE_LEVEL_HIGH /* CE9 */ >,
> +				<GIC_SPI 424 IRQ_TYPE_LEVEL_HIGH /* CE10 */>,
> +				<GIC_SPI 425 IRQ_TYPE_LEVEL_HIGH /* CE11 */>;

not sure these 'CEx' comments after each interrupt add much value. What does
'CE' stand for in the first place?

Thanks

Matthias