linux-kernel - [PATCH V3 2/5] arm64: dts: imx8mn: Enable Asynchronous Sample Rate Converter

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Date:   Fri,  6 Nov 2020 05:15:40 -0600
From:   Adam Ford <aford173@...il.com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     aford@...conembedded.com, Adam Ford <aford173@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH V3 2/5] arm64: dts: imx8mn: Enable Asynchronous Sample Rate Converter

The driver exists for the Enhanced Asynchronous Sample Rate Converter
(EASRC) Controller, but there isn't a device tree entry for it.

On the vendor kernel, they put this on a spba-bus for SDMA support.

Add the node for the spba-bus with the easrc node inside.

Signed-off-by: Adam Ford <aford173@...il.com>
---
V3:  Change spba-bus@...00000 to spba: bus@...00000
V2:  Make the DT node more in-line with the dt binding and remove
     vendor customizations that are not applicable.

diff --git a/arch/arm64/boot/dts/freescale/imx8mn.dtsi b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
index a06d2a6268e6..61560c083300 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
@@ -253,6 +253,34 @@ aips1: bus@...00000 {
 			#size-cells = <1>;
 			ranges;
 
+			spba: bus@...00000 {
+				compatible = "fsl,spba-bus", "simple-bus";
+				#address-cells = <1>;
+				#size-cells = <1>;
+				reg = <0x30000000 0x100000>;
+				ranges;
+
+				easrc: easrc@...c0000 {
+					compatible = "fsl,imx8mn-easrc";
+					reg = <0x300c0000 0x10000>;
+					interrupts = <GIC_SPI 122 IRQ_TYPE_LEVEL_HIGH>;
+					clocks = <&clk IMX8MN_CLK_ASRC_ROOT>;
+					clock-names = "mem";
+					dmas = <&sdma2 16 23 0> , <&sdma2 17 23 0>,
+					       <&sdma2 18 23 0> , <&sdma2 19 23 0>,
+					       <&sdma2 20 23 0> , <&sdma2 21 23 0>,
+					       <&sdma2 22 23 0> , <&sdma2 23 23 0>;
+					dma-names = "ctx0_rx", "ctx0_tx",
+						    "ctx1_rx", "ctx1_tx",
+						    "ctx2_rx", "ctx2_tx",
+						    "ctx3_rx", "ctx3_tx";
+					firmware-name = "imx/easrc/easrc-imx8mn.bin";
+					fsl,asrc-rate  = <8000>;
+					fsl,asrc-format = <2>;
+					status = "disabled";
+				};
+			};
+
 			gpio1: gpio@...00000 {
 				compatible = "fsl,imx8mn-gpio", "fsl,imx35-gpio";
 				reg = <0x30200000 0x10000>;
-- 
2.25.1