linux-kernel - Re: [PATCH] arm64: dts: qcom: Add BLSP DMAs for I2C

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Date:   Sat, 22 Apr 2023 14:02:57 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Luca Weiss <luca@...tu.xyz>, ~postmarketos/upstreaming@...ts.sr.ht,
        phone-devel@...r.kernel.org, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: qcom: Add BLSP DMAs for I2C



On 22.04.2023 13:39, Luca Weiss wrote:
> MSM8953 has two DMA controllers for the various I2C, SPI and UART
> busses. Add the nodes and configure all the I2C nodes so that the driver
> can use the DMA.
> 
> Signed-off-by: Luca Weiss <luca@...tu.xyz>
> ---Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>

Konrad
>  arch/arm64/boot/dts/qcom/msm8953.dtsi | 48 +++++++++++++++++++++++++++++++++++
>  1 file changed, 48 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/msm8953.dtsi b/arch/arm64/boot/dts/qcom/msm8953.dtsi
> index 602cb188a635..c9b589353918 100644
> --- a/arch/arm64/boot/dts/qcom/msm8953.dtsi
> +++ b/arch/arm64/boot/dts/qcom/msm8953.dtsi
> @@ -1274,6 +1274,19 @@ opp-200000000 {
>  			};
>  		};
>  
> +		blsp1_dma: dma-controller@...4000 {
> +			compatible = "qcom,bam-v1.7.0";
> +			reg = <0x07884000 0x1f000>;
> +			interrupts = <GIC_SPI 238 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&gcc GCC_BLSP1_AHB_CLK>;
> +			clock-names = "bam_clk";
> +			num-channels = <12>;
> +			#dma-cells = <1>;
> +			qcom,ee = <0>;
> +			qcom,num-ees = <4>;
> +			qcom,controlled-remotely;
> +		};
> +
>  		uart_0: serial@...f000 {
>  			compatible = "qcom,msm-uartdm-v1.4", "qcom,msm-uartdm";
>  			reg = <0x078af000 0x200>;
> @@ -1292,6 +1305,8 @@ i2c_1: i2c@...5000 {
>  			clock-names = "core", "iface";
>  			clocks = <&gcc GCC_BLSP1_QUP1_I2C_APPS_CLK>,
>  				 <&gcc GCC_BLSP1_AHB_CLK>;
> +			dmas = <&blsp1_dma 4>, <&blsp1_dma 5>;
> +			dma-names = "tx", "rx";
>  
>  			pinctrl-names = "default", "sleep";
>  			pinctrl-0 = <&i2c_1_default>;
> @@ -1310,6 +1325,8 @@ i2c_2: i2c@...6000 {
>  			clock-names = "core", "iface";
>  			clocks = <&gcc GCC_BLSP1_QUP2_I2C_APPS_CLK>,
>  				 <&gcc GCC_BLSP1_AHB_CLK>;
> +			dmas = <&blsp1_dma 6>, <&blsp1_dma 7>;
> +			dma-names = "tx", "rx";
>  
>  			pinctrl-names = "default", "sleep";
>  			pinctrl-0 = <&i2c_2_default>;
> @@ -1328,6 +1345,9 @@ i2c_3: i2c@...7000 {
>  			clock-names = "core", "iface";
>  			clocks = <&gcc GCC_BLSP1_QUP3_I2C_APPS_CLK>,
>  				 <&gcc GCC_BLSP1_AHB_CLK>;
> +			dmas = <&blsp1_dma 8>, <&blsp1_dma 9>;
> +			dma-names = "tx", "rx";
> +
>  			pinctrl-names = "default", "sleep";
>  			pinctrl-0 = <&i2c_3_default>;
>  			pinctrl-1 = <&i2c_3_sleep>;
> @@ -1345,6 +1365,9 @@ i2c_4: i2c@...8000 {
>  			clock-names = "core", "iface";
>  			clocks = <&gcc GCC_BLSP1_QUP4_I2C_APPS_CLK>,
>  				 <&gcc GCC_BLSP1_AHB_CLK>;
> +			dmas = <&blsp2_dma 10>, <&blsp2_dma 11>;
> +			dma-names = "tx", "rx";
> +
>  			pinctrl-names = "default", "sleep";
>  			pinctrl-0 = <&i2c_4_default>;
>  			pinctrl-1 = <&i2c_4_sleep>;
> @@ -1355,6 +1378,19 @@ i2c_4: i2c@...8000 {
>  			status = "disabled";
>  		};
>  
> +		blsp2_dma: dma-controller@...4000 {
> +			compatible = "qcom,bam-v1.7.0";
> +			reg = <0x07ac4000 0x1f000>;
> +			interrupts = <GIC_SPI 239 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&gcc GCC_BLSP2_AHB_CLK>;
> +			clock-names = "bam_clk";
> +			num-channels = <12>;
> +			#dma-cells = <1>;
> +			qcom,ee = <0>;
> +			qcom,num-ees = <4>;
> +			qcom,controlled-remotely;
> +		};
> +
>  		i2c_5: i2c@...5000 {
>  			compatible = "qcom,i2c-qup-v2.2.1";
>  			reg = <0x07af5000 0x600>;
> @@ -1362,6 +1398,9 @@ i2c_5: i2c@...5000 {
>  			clock-names = "core", "iface";
>  			clocks = <&gcc GCC_BLSP2_QUP1_I2C_APPS_CLK>,
>  				 <&gcc GCC_BLSP2_AHB_CLK>;
> +			dmas = <&blsp2_dma 4>, <&blsp2_dma 5>;
> +			dma-names = "tx", "rx";
> +
>  			pinctrl-names = "default", "sleep";
>  			pinctrl-0 = <&i2c_5_default>;
>  			pinctrl-1 = <&i2c_5_sleep>;
> @@ -1379,6 +1418,9 @@ i2c_6: i2c@...6000 {
>  			clock-names = "core", "iface";
>  			clocks = <&gcc GCC_BLSP2_QUP2_I2C_APPS_CLK>,
>  				 <&gcc GCC_BLSP2_AHB_CLK>;
> +			dmas = <&blsp2_dma 6>, <&blsp2_dma 7>;
> +			dma-names = "tx", "rx";
> +
>  			pinctrl-names = "default", "sleep";
>  			pinctrl-0 = <&i2c_6_default>;
>  			pinctrl-1 = <&i2c_6_sleep>;
> @@ -1396,6 +1438,9 @@ i2c_7: i2c@...7000 {
>  			clock-names = "core", "iface";
>  			clocks = <&gcc GCC_BLSP2_QUP3_I2C_APPS_CLK>,
>  				 <&gcc GCC_BLSP2_AHB_CLK>;
> +			dmas = <&blsp2_dma 8>, <&blsp2_dma 9>;
> +			dma-names = "tx", "rx";
> +
>  			pinctrl-names = "default", "sleep";
>  			pinctrl-0 = <&i2c_7_default>;
>  			pinctrl-1 = <&i2c_7_sleep>;
> @@ -1413,6 +1458,9 @@ i2c_8: i2c@...8000 {
>  			clock-names = "core", "iface";
>  			clocks = <&gcc GCC_BLSP2_QUP4_I2C_APPS_CLK>,
>  				 <&gcc GCC_BLSP2_AHB_CLK>;
> +			dmas = <&blsp2_dma 10>, <&blsp2_dma 11>;
> +			dma-names = "tx", "rx";
> +
>  			pinctrl-names = "default", "sleep";
>  			pinctrl-0 = <&i2c_8_default>;
>  			pinctrl-1 = <&i2c_8_sleep>;
> 
> ---
> base-commit: 347e9b4e41bfff51993807962eb1082f6d8ab439
> change-id: 20230422-msm8953-blsp-dma-1174277859f2
> 
> Best regards,