Re: [PATCH 3/7] MIPS: intel: Add initial support for Intel MIPS SoCs

[Rob Herring <robh@kernel.org>]

On Tue, Jun 12, 2018 at 01:40:30PM +0800, Songjun Wu wrote:
> From: Hua Ma <hua.ma@linux.intel.com>
> 
> Add initial support for Intel MIPS interAptiv SoCs made by Intel.
> This series will add support for the GRX500 family.
> 
> The series allows booting a minimal system using a initramfs.
> 
> Signed-off-by: Hua ma <hua.ma@linux.intel.com>
> Signed-off-by: Songjun Wu <songjun.wu@linux.intel.com>
> ---
> 
>  arch/mips/Kbuild.platforms                         |   1 +
>  arch/mips/Kconfig                                  |  36 ++++
>  arch/mips/boot/dts/Makefile                        |   1 +
>  arch/mips/boot/dts/intel-mips/Makefile             |   3 +
>  arch/mips/boot/dts/intel-mips/easy350_anywan.dts   |  20 +++
>  arch/mips/boot/dts/intel-mips/xrx500.dtsi          | 196 +++++++++++++++++++++

Please split dts files to separate patch.


> diff --git a/arch/mips/boot/dts/intel-mips/easy350_anywan.dts b/arch/mips/boot/dts/intel-mips/easy350_anywan.dts
> new file mode 100644
> index 000000000000..40177f6cee1e
> --- /dev/null
> +++ b/arch/mips/boot/dts/intel-mips/easy350_anywan.dts
> @@ -0,0 +1,20 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/dts-v1/;
> +
> +#include <dt-bindings/interrupt-controller/mips-gic.h>
> +#include <dt-bindings/clock/intel,grx500-clk.h>
> +
> +#include "xrx500.dtsi"
> +
> +/ {
> +	model = "EASY350 ANYWAN (GRX350) Main model";

A board should have a board specific compatible, too. 

> +	chosen {
> +		bootargs = "earlycon=lantiq,0x16600000 clk_ignore_unused";
> +		stdout-path = "serial0";
> +	};
> +
> +	memory@0 {

memory@20000000

> +		device_type = "memory";
> +		reg = <0x20000000 0x0e000000>;
> +	};
> +};
> diff --git a/arch/mips/boot/dts/intel-mips/xrx500.dtsi b/arch/mips/boot/dts/intel-mips/xrx500.dtsi
> new file mode 100644
> index 000000000000..04a068d6d96b
> --- /dev/null
> +++ b/arch/mips/boot/dts/intel-mips/xrx500.dtsi
> @@ -0,0 +1,196 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +/ {
> +	#address-cells = <1>;
> +	#size-cells = <1>;
> +	compatible = "intel,xrx500";

This needs to be documented.

> +
> +	aliases {
> +		serial0 = &asc0;
> +	};
> +
> +	cpus {
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		cpu0: cpu@0 {
> +			device_type = "cpu";
> +			compatible = "mti,interaptiv";
> +			clocks = <&cpuclk>;
> +			reg = <0>;
> +		};
> +
> +		cpu1: cpu@1 {
> +			device_type = "cpu";
> +			compatible = "mti,interaptiv";
> +			reg = <1>;
> +		};
> +	};
> +
> +	cpu_intc: interrupt-controller {
> +		compatible = "mti,cpu-interrupt-controller";
> +
> +		interrupt-controller;
> +		#interrupt-cells = <1>;
> +	};
> +
> +	gic: gic@12320000 {
> +		compatible = "mti,gic";
> +		reg = <0x12320000 0x20000>;
> +
> +		interrupt-controller;
> +		#interrupt-cells = <3>;
> +		/*
> +		 * Declare the interrupt-parent even though the mti,gic
> +		 * binding doesn't require it, such that the kernel can
> +		 * figure out that cpu_intc is the root interrupt
> +		 * controller & should be probed first.
> +		 */
> +		interrupt-parent = <&cpu_intc>;
> +		mti,reserved-ipi-vectors = <56 8>;
> +	};
> +
> +	cgu0: cgu@16200000 {
> +		compatible = "syscon";
> +		reg = <0x16200000 0x100000>;
> +
> +		clock {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +
> +			osc0: osc0 {
> +				#clock-cells = <0>;
> +				compatible = "fixed-clock";
> +				clock-frequency = <40000000>;
> +				clock-output-names = "osc40M";
> +			};
> +
> +			pll0a: pll0a {
> +				#clock-cells = <0>;
> +				compatible = "fixed-factor-clock";
> +				clock-mult = <0x3C>;
> +				clock-div = <1>;
> +				clocks = <&osc0>;
> +				clock-output-names = "pll0a";
> +			};
> +
> +			pll0b: pll0b {
> +				#clock-cells = <0>;
> +				compatible = "fixed-factor-clock";
> +				clock-mult = <0x32>;
> +				clock-div = <1>;
> +				clocks = <&osc0>;
> +				clock-output-names = "pll0b";
> +			};
> +
> +			pll3: pll3 {
> +				#clock-cells = <0>;
> +				compatible = "fixed-factor-clock";
> +				clock-mult = <0x64>;
> +				clock-div = <1>;
> +				clocks = <&osc0>;
> +				clock-output-names = "lcpll3";
> +			};
> +
> +			pll0aclk: pll0aclk {
> +				#clock-cells = <1>;
> +				compatible = "intel,grx500-pll0a-clk";
> +				clocks = <&pll0a>;
> +				reg = <0x8>;
> +				clock-output-names = "cbm", "ngi",
> +				"ssx4", "cpu0";
> +			};
> +
> +			pll0bclk: pll0bclk {
> +				#clock-cells = <1>;
> +				compatible = "intel,grx500-pll0b-clk";
> +				clocks = <&pll0b>;
> +				reg = <0x38>;
> +				clock-output-names = "pae", "gswip", "ddr",
> +				"cpu1";
> +			};
> +
> +			ddrphyclk: ddrphyclk {
> +				#clock-cells = <0>;
> +				compatible = "fixed-factor-clock";
> +				clock-mult = <2>;
> +				clock-div = <1>;
> +				clocks = <&pll0bclk DDR_CLK>;
> +				clock-output-names = "ddrphy";
> +			};
> +
> +			pcieclk: pcieclk {
> +				#clock-cells = <0>;
> +				compatible = "intel,grx500-pcie-clk";
> +				clocks = <&pll3>;
> +				reg = <0x98>;
> +				clock-output-names = "pcie";
> +			};
> +
> +			cpuclk: cpuclk {
> +				#clock-cells = <0>;
> +				compatible = "intel,grx500-cpu-clk";
> +				clocks = <&pll0aclk CPU0_CLK>,
> +				<&pll0bclk CPU1_CLK>;
> +				reg = <0x8>;
> +				clock-output-names = "cpu";
> +			};
> +
> +			clkgate0: clkgate0 {
> +				#clock-cells = <1>;
> +				compatible = "intel,grx500-gate0-clk";
> +				reg = <0x114>;
> +				clock-output-names = "gate_xbar0", "gate_xbar1",
> +				"gate_xbar2", "gate_xbar3", "gate_xbar6",
> +				"gate_xbar7";
> +			};
> +
> +			clkgate1: clkgate1 {
> +				#clock-cells = <1>;
> +				compatible = "intel,grx500-gate1-clk";
> +				reg = <0x120>;
> +				clock-output-names = "gate_vcodec", "gate_dma0",
> +				"gate_usb0", "gate_spi1", "gate_spi0",
> +				"gate_cbm", "gate_ebu", "gate_sso",
> +				"gate_gptc0", "gate_gptc1", "gate_gptc2",
> +				"gate_urt", "gate_eip97", "gate_eip123",
> +				"gate_toe", "gate_mpe", "gate_tdm", "gate_pae",
> +				"gate_usb1", "gate_gswip";
> +			};
> +
> +			clkgate2: clkgate2 {
> +				#clock-cells = <1>;
> +				compatible = "intel,grx500-gate2-clk";
> +				reg = <0x130>;
> +				clock-output-names = "gate_pcie0", "gate_pcie1",
> +				"gate_pcie2";
> +			};
> +
> +			voiceclk: voiceclk {
> +				#clock-cells = <0>;
> +				compatible = "intel,grx500-voice-clk";
> +				clock-frequency = <8192000>;
> +				reg = <0xc4>;
> +				clock-output-names = "voice";
> +			};
> +
> +			i2cclk: i2cclk {
> +				#clock-cells = <0>;
> +				compatible = "intel,grx500-gate-dummy-clk";
> +				clock-output-names = "gate_i2c";
> +			};
> +		};
> +	};
> +
> +	asc0: serial@16600000 {
> +		compatible = "lantiq,asc";
> +		reg = <0x16600000 0x100000>;
> +
> +		interrupt-parent = <&gic>;
> +		interrupts = <GIC_SHARED 103 IRQ_TYPE_LEVEL_HIGH>,
> +			<GIC_SHARED 105 IRQ_TYPE_LEVEL_HIGH>,
> +			<GIC_SHARED 106 IRQ_TYPE_LEVEL_HIGH>;
> +		clocks = <&pll0aclk SSX4_CLK>, <&clkgate1 GATE_URT_CLK>;
> +		clock-names = "freq", "asc";
> +	};
> +};