ad485x - version to be upstreamed

Signed-off-by: Dragos Bogdan <[email protected]>

Author: dbogdan

arch/arm/boot/dts/xilinx/zynq-zed-ad485x.dts

@@ -0,0 +1,84 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+#include "zynq-zed.dts"
+
+#include <dt-bindings/interrupt-controller/irq.h>
+
+/ {
+	clocks {
+		axi_clk: clock@0 {
+			compatible = "fixed-clock";
+			clock-frequency = <100000000>;
+			clock-output-names = "axi-clk";
+			#clock-cells = <0>;
+		};
+	};
+
+	fpga-axi@0 {
+		compatible = "simple-bus";
+		#address-cells = <0x1>;
+		#size-cells = <0x1>;
+		ranges;
+
+		rx_dma: dmac@43e00000 {
+			compatible = "adi,axi-dmac-1.00.a";
+			reg = <0x43E00000 0x1000>;
+			#dma-cells = <1>;
+			interrupt-parent = <&intc>;
+			interrupts = <0 54 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&clkc 15>;
+
+			adi,channels {
+				#size-cells = <0>;
+				#address-cells = <1>;
+
+				dma_channel: dma-channel@0 {
+					reg = <0>;
+					adi,source-bus-width = <128>;
+					adi,source-bus-type = <2>;
+					adi,destination-bus-width = <64>;
+					adi,destination-bus-type = <0>;
+				};
+			};
+		};
+
+		ref_clk: clk@0x44000000 {
+			compatible = "adi,axi-clkgen-2.00.a";
+			reg = <0x44000000 0x10000>;
+			#clock-cells = <0>;
+			clocks = <&clkc 15>, <&clkc 16>;
+			clock-names = "s_axi_aclk", "clkin1";
+			clock-output-names = "ref_clk";
+		};
+
+		axi_pwm_gen: pwm@0x43d00000 {
+			compatible = "adi,axi-pwmgen";
+			reg = <0x43d00000 0x1000>;
+			label = "cnv";
+			#pwm-cells = <2>;
+			clocks = <&ref_clk>;
+		};
+
+		iio_backend: axi_adc@43c00000 {
+			compatible = "adi,axi-adc-10.0.a";
+			reg = <0x43c00000 0x10000>;
+			dmas = <&rx_dma 0>;
+			dma-names = "rx";
+			clocks = <&axi_clk>;
+			spibus-connected = <&ad485x>;
+		};
+	};
+};
+
+&spi0 {
+	status = "okay";
+
+	ad485x: adc@0{
+		compatible = "adi,ad4857";
+		reg = <0>;
+		spi-max-frequency = <10000000>;
+		pwms = <&axi_pwm_gen 0 0>;
+		pwm-names = "cnv";
+		io-backends = <&iio_backend>;
+	};
+};

drivers/iio/adc/Kconfig

@@ -36,6 +36,18 @@ config AD4130
 	  To compile this driver as a module, choose M here: the module will be
 	  called ad4130.
 
+config AD485X
+	tristate "Analog Device AD485x DAS Driver"
+	depends on SPI
+	select REGMAP_SPI
+	select IIO_BACKEND
+	help
+	  Say yes here to build support for Analog Devices AD485x high speed
+	  data acquisition system (DAS).
+
+	  To compile this driver as a module, choose M here: the module will be
+	  called ad485x.
+
 config AD7091R
 	tristate
 

drivers/iio/adc/Makefile

@@ -7,6 +7,7 @@
 obj-$(CONFIG_AB8500_GPADC) += ab8500-gpadc.o
 obj-$(CONFIG_AD_SIGMA_DELTA) += ad_sigma_delta.o
 obj-$(CONFIG_AD4130) += ad4130.o
+obj-$(CONFIG_AD485X) += ad485x.o
 obj-$(CONFIG_AD7091R) += ad7091r-base.o
 obj-$(CONFIG_AD7091R5) += ad7091r5.o
 obj-$(CONFIG_AD7091R8) += ad7091r8.o