Device Tree Configuration

The general configuration profile of the JH7110 SoC platform is in the following file:

linux/arch/riscv/boot/dts/starfive/jh7110.dtsi

The following code block shows the content of the configuration file.

        gpio: gpio@13040000 {
                compatible = "starfive,jh7110-sys-pinctrl";
                reg = <0x0 0x13040000 0x0 0x10000>;
                reg-names = "control";
                clocks = <&clkgen JH7110_SYS_IOMUX_PCLK>;
                resets = <&rstgen RSTN_U0_SYS_IOMUX_PRESETN>;
                interrupts = <86>;
                interrupt-controller;
                #gpio-cells = <2>;
                ngpios = <64>;
                status = "okay";
        };

        gpioa: gpio@17020000 {
                compatible = "starfive,jh7110-aon-pinctrl";
                reg = <0x0 0x17020000 0x0 0x10000>;
                reg-names = "control";
                resets = <&rstgen RSTN_U0_AON_IOMUX_PRESETN>;
                interrupts = <85>;
                interrupt-controller;
                #gpio-cells = <2>;
                ngpios = <4>;
                status = "okay";
        };

The following list provides explanations for the parameters included in the above code block.

• compatible: Compatibility information, used to associate the driver and its target device.
• reg: Register base address "0x13040000" and range "0x10000".
• reg-names: Names of the registers used by the GPIO module.
• clocks: The clocks used by the GPIO module.
• clock-names: The names of the above clocks.
• resets: The reset signals used by the GPIO module.
• interrupts: Hardware interrupt ID.
• status: The work status of the GPIO module. To enable the module, set this bit as "okay" or to disable the module, set this bit as "disabled".