linux-kernel - Re: [PATCH v4 1/2] arm64: dts: mt7622: add basic nodes to the mt7622.dtsi file

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Message-ID: <37f67b23-7995-3b93-2ee0-c04b34428bd9@gmail.com>
Date:   Thu, 15 Jun 2017 18:04:26 +0200
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     sean.wang@...iatek.com, robh+dt@...nel.org, mark.rutland@....com,
        devicetree@...r.kernel.org, john@...ozen.org,
        linux-mediatek@...ts.infradead.org
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 1/2] arm64: dts: mt7622: add basic nodes to the
 mt7622.dtsi file



On 14/06/17 18:11, sean.wang@...iatek.com wrote:
> From: Sean Wang <sean.wang@...iatek.com>
> 
> add basic nodes into the mt7622.dtsi for the system
> bring-up which includes ARM CPU, GIC, timer, MediaTek
> UART, SYSIRQ and one reserved memory region for ATF.
> 
> Signed-off-by: Sean Wang <sean.wang@...iatek.com>
> ---
>   arch/arm64/boot/dts/mediatek/mt7622.dtsi | 104 +++++++++++++++++++++++++++++++
>   1 file changed, 104 insertions(+)
>   create mode 100644 arch/arm64/boot/dts/mediatek/mt7622.dtsi
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt7622.dtsi b/arch/arm64/boot/dts/mediatek/mt7622.dtsi
> new file mode 100644
> index 0000000..239b9b3
> --- /dev/null
> +++ b/arch/arm64/boot/dts/mediatek/mt7622.dtsi
> @@ -0,0 +1,104 @@
> +/*
> + * Copyright (c) 2017 MediaTek Inc.
> + * Author: Ming Huang <ming.huang@...iatek.com>
> + *	   Sean Wang <sean.wang@...iatek.com>
> + *
> + * SPDX-License-Identifier: (GPL-2.0 OR MIT)
> + */
> +
> +#include <dt-bindings/interrupt-controller/irq.h>
> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +/ {
> +	compatible = "mediatek,mt7622";
> +	interrupt-parent = <&sysirq>;
> +	#address-cells = <2>;
> +	#size-cells = <2>;
> +
> +	cpus {
> +		#address-cells = <2>;
> +		#size-cells = <0>;
> +
> +		cpu0: cpu@0 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a53", "arm,armv8";
> +			reg = <0x0 0x0>;
> +			enable-method = "psci";
> +			clock-frequency = <1300000000>;
> +		};
> +
> +		cpu1: cpu@1 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a53", "arm,armv8";
> +			reg = <0x0 0x1>;
> +			enable-method = "psci";
> +			clock-frequency = <1300000000>;
> +		};
> +	};
> +
> +	uart_clk: dummy25m {
> +		compatible = "fixed-clock";
> +		#clock-cells = <0>;
> +		clock-frequency = <25000000>;
> +	};
> +
> +	psci {
> +		compatible  = "arm,psci-0.2";
> +		method      = "smc";
> +	};
> +
> +	reserved-memory {
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges;
> +
> +		/* 192 KiB reserved for ARM Trusted Firmware (BL31) */
> +		secmon_reserved: secmon@...00000 {
> +			reg = <0 0x43000000 0 0x30000>;
> +			no-map;
> +		};
> +	};
> +
> +	timer {
> +		compatible = "arm,armv8-timer";
> +		interrupt-parent = <&gic>;
> +		interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(2) |
> +			      IRQ_TYPE_LEVEL_HIGH)>,
> +			     <GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(2) |
> +			      IRQ_TYPE_LEVEL_HIGH)>,
> +			     <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(2) |
> +			      IRQ_TYPE_LEVEL_HIGH)>,
> +			     <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(2) |
> +			      IRQ_TYPE_LEVEL_HIGH)>;
> +	};
> +
> +	sysirq: interrupt-controller@...00620 {
> +		compatible = "mediatek,mt7622-sysirq",
> +			     "mediatek,mt6577-sysirq";
> +		interrupt-controller;
> +		#interrupt-cells = <3>;
> +		interrupt-parent = <&gic>;
> +		reg = <0 0x10200620 0 0x20>;
> +	};
> +
> +	gic: interrupt-controller@...00000 {
> +		compatible = "arm,gic-400";
> +		interrupt-controller;
> +		#interrupt-cells = <3>;
> +		interrupt-parent = <&gic>;
> +		reg = <0 0x10310000 0 0x1000>,
> +		      <0 0x10320000 0 0x1000>,
> +		      <0 0x10340000 0 0x2000>,
> +		      <0 0x10360000 0 0x2000>;
> +	};
> +
> +	uart0: serial@...02000 {
> +		compatible = "mediatek,mt7622-uart",
> +			     "mediatek,mt6577-uart";
> +		reg = <0 0x11002000 0 0x400>;
> +		interrupts = <GIC_SPI 91 IRQ_TYPE_LEVEL_LOW>;
> +		clocks = <&uart_clk>, <&uart_clk>;

Please add a dummy clock node with the correct frequency, as done in 
other chips as well.

Thanks,
Matthias

> +		clock-names = "baud", "bus";
> +		status = "disabled";
> +	};
> +};
>