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

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Date:   Sat, 22 Apr 2023 13:39:16 +0200
From:   Luca Weiss <luca@...tu.xyz>
To:     ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.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, Luca Weiss <luca@...tu.xyz>
Subject: [PATCH] arm64: dts: qcom: Add BLSP DMAs for I2C

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>
---
 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,
-- 
Luca Weiss <luca@...tu.xyz>