Linux 6.6 th1520 adc driver

Documentation/devicetree/bindings/iio/adc/thead,th1520-adc.yaml

@@ -0,0 +1,52 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/thead,th1520-adc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: THEAD TH1520 Analog to Digital Converter (ADC)
+
+maintainers:
+  - Fugang Duan <[email protected]>
+  - Xiangyi Zeng <[email protected]>
+  - Wei Fu <[email protected]>
+
+description: |
+  12-Bit Analog to Digital Converter (ADC) on XuanTie TH1520
+properties:
+  compatible:
+    const: thead,th1520
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    const: adc
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - status
+
+additionalProperties: false
+
+examples:
+  - |
+    adc: adc@0xfffff51000 {
+        compatible = "thead,th1520-adc";
+        reg = <0xff 0xfff51000 0x0 0x1000>;
+        interrupts = <61 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&aonsys_clk>;
+        clock-names = "adc";
+        /* ADC pin is proprietary,no need to config pinctrl */
+        status = "disabled";
+    };

arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts

@@ -410,3 +410,7 @@
 		vbus-supply = <&vcc5v_usb>;
 	};
 };
+
+&adc {
+	status = "okay";
+};

arch/riscv/boot/dts/thead/th1520.dtsi

@@ -747,5 +747,15 @@
 				interrupts = <55 IRQ_TYPE_LEVEL_HIGH>;
 			};
 		};
+
+		adc: adc@0xfffff51000 {
+			compatible = "thead,th1520-adc";
+			reg = <0xff 0xfff51000 0x0 0x1000>;
+			interrupts = <61 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&aonsys_clk>;
+			clock-names = "adc";
+			/* ADC pin is proprietary,no need to config pinctrl */
+			status = "disabled";
+		};
 	};
 };

arch/riscv/configs/defconfig

@@ -276,3 +276,5 @@ CONFIG_USB_ONBOARD_HUB=m
 CONFIG_USB_GADGET=m
 CONFIG_TYPEC=m
 CONFIG_USB_ROLE_SWITCH=m
+CONFIG_IIO=y
+CONFIG_THEAD_TH1520_ADC=m

drivers/iio/adc/Kconfig

@@ -1441,4 +1441,17 @@ config XILINX_AMS
 	  The driver can also be built as a module. If so, the module will be called
 	  xilinx-ams.
 
+config THEAD_TH1520_ADC
+	tristate "THEAD TH1520 ADC driver"
+	depends on OF
+	depends on HAS_IOMEM
+	depends on ARCH_THEAD
+	default y
+	help
+	  Say yes here to support for THEAD TH1520 MPW analog-to-digital
+	  converter.
+
+	  This driver can also be built as a module. If so, the module will be
+	  called thead-th1520-adc.
+
 endmenu

drivers/iio/adc/Makefile

@@ -129,3 +129,4 @@ xilinx-xadc-y := xilinx-xadc-core.o xilinx-xadc-events.o
 obj-$(CONFIG_XILINX_XADC) += xilinx-xadc.o
 obj-$(CONFIG_XILINX_AMS) += xilinx-ams.o
 obj-$(CONFIG_SD_ADC_MODULATOR) += sd_adc_modulator.o
+obj-$(CONFIG_THEAD_TH1520_ADC) += th1520-adc.o