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Message-ID: <4cda3645-c4e8-1b3c-bd80-891afd56449a@linaro.org>
Date:   Tue, 3 May 2022 13:47:01 +0200
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Subject: Re: [RFC v2 2/2] arm: hisi: enable Hi3521a soc
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To:     "Marty E. Plummer" <hanetzer@startmail.com>, arnd@arndb.de,
        cai.huoqing@linux.dev, christian.koenig@amd.com,
        devicetree@vger.kernel.org, gengdongjiu@huawei.com,
        krzysztof.kozlowski+dt@linaro.org,
        linux-arm-kernel@lists.infradead.org, linux-clk@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org,
        linux@armlinux.org.uk, michael@walle.cc, miquel.raynal@bootlin.com,
        mturquette@baylibre.com, novikov@ispras.ru, olof@lixom.net,
        p.yadav@ti.com, rdunlap@infradead.org, richard@nod.at,
        robh+dt@kernel.org, sboyd@kernel.org, soc@kernel.org,
        sumit.semwal@linaro.org, tudor.ambarus@microchip.com,
        vigneshr@ti.com, xuwei5@hisilicon.com
References: <20220501054440.2434247-1-hanetzer@startmail.com>
 <20220501173423.2473093-1-hanetzer@startmail.com>
 <20220501173423.2473093-3-hanetzer@startmail.com>
From:   Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
In-Reply-To: <20220501173423.2473093-3-hanetzer@startmail.com>
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Precedence: bulk

On 01/05/2022 19:34, Marty E. Plummer wrote:
> Enable Hisilicon Hi3521A/Hi3520DCV300 SoC. This SoC series includes
> hardware mutlimedia codec cores, commonly used in consumer cctv/dvr
> security systems and ipcameras. The arm core is a Cortex A7.
> 
> Add hi3521a.dtsi and hi3521a-rs-dm290e.dts for RaySharp CCTV systems,
> marketed under the name Samsung SDR-B74301N.

Thank you for your patch. There is something to discuss/improve.

> 
> Signed-off-by: Marty E. Plummer <hanetzer@startmail.com>
> ---
>  arch/arm/boot/dts/Makefile              |   2 +
>  arch/arm/boot/dts/hi3521a-rs-dm290e.dts | 134 ++++++++
>  arch/arm/boot/dts/hi3521a.dtsi          | 423 ++++++++++++++++++++++++

DTSes go to separate patches.

>  arch/arm/mach-hisi/Kconfig              |   9 +
>  4 files changed, 568 insertions(+)
>  create mode 100644 arch/arm/boot/dts/hi3521a-rs-dm290e.dts
>  create mode 100644 arch/arm/boot/dts/hi3521a.dtsi
> 
> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
> index 7c16f8a2b738..535cef3b14ab 100644
> --- a/arch/arm/boot/dts/Makefile
> +++ b/arch/arm/boot/dts/Makefile
> @@ -242,6 +242,8 @@ dtb-$(CONFIG_ARCH_GEMINI) += \
>  	gemini-ssi1328.dtb \
>  	gemini-wbd111.dtb \
>  	gemini-wbd222.dtb
> +dtb-$(CONFIG_ARCH_HI3521A) += \
> +	hi3521a-rs-dm290e.dtb
>  dtb-$(CONFIG_ARCH_HI3xxx) += \
>  	hi3620-hi4511.dtb
>  dtb-$(CONFIG_ARCH_HIGHBANK) += \
> diff --git a/arch/arm/boot/dts/hi3521a-rs-dm290e.dts b/arch/arm/boot/dts/hi3521a-rs-dm290e.dts
> new file mode 100644
> index 000000000000..b24fcf2ca85e
> --- /dev/null
> +++ b/arch/arm/boot/dts/hi3521a-rs-dm290e.dts
> @@ -0,0 +1,134 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * Copyright (C) 2017-2022 Marty Plummer <hanetzer@startmail.com>
> + */
> +
> +#include "hi3521a.dtsi"
> +
> +/ {
> +	model = "RaySharp RS-DM-290E DVR Board";
> +	compatible = "raysharp,rs-dm-290e", "hisilicon,hi3521a";

Please run checkpatch and fix the warnings.

> +
> +	aliases {
> +		serial0 = &uart0;
> +		serial1 = &uart1;
> +		serial2 = &uart2;
> +	};
> +
> +	chosen {
> +		stdout-path = "serial0:115200n8";
> +	};
> +
> +	memory@800000000 {
> +		device_type = "memory";
> +		reg = <0x80000000 0xf00000>;
> +	};
> +};
> +
> +&hi_sfc {
> +	status = "okay";
> +	spi-nor@0 {

Looks like wrong node name. You need to run "dtbs_check" and fix
warnings related to your DTS.

> +		// compatible = "jedec,spi-nor";

No dead code in Linux kernel. Commented out stuff sometimes is okay if
it is explained with comments.

> +		compatible = "macronix,mx25l25635e", "jedec,spi-nor";
> +		reg = <0>;
> +		spi-max-frequency = <150000000>;
> +		// spi-rx-bus-width = <1>;
> +		// spi-tx-bus-width = <1>;
> +		// m25p,default-addr-width = <4>;
> +		// spi-max-frequency = <160000000>;

No dead code.

> +		m25p,fast-read;
> +
> +		partitions {
> +			compatible = "fixed-partitions";
> +			#address-cells = <1>;
> +			#size-cells = <1>;
> +			
> +			u-boot@0 {
> +				label = "u-boot";
> +				reg = <0x0 0x50000>;
> +				read-only;
> +			};
> +			u-boot-env@50000 {
> +				label = "u-boot-env";
> +				reg = <0x50000 0x20000>;
> +			};
> +			kernel@70000 {
> +				label = "kernel";
> +				reg = <0x70000 0x700000>;
> +			};
> +			rootfs@770000 {
> +				label = "rootfs";
> +				reg = <0x800000 0x300000>;
> +				read-only;
> +			};
> +			extra@b00000 {
> +				label = "extra";
> +				reg = <0xb00000 0x1500000>;
> +			};
> +		};
> +	};
> +};
> +
> +&dual_timer0 {
> +	status = "okay";
> +};
> +
> +&uart0 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&uart0_pmx_func &uart0_cfg_func>;
> +	status = "okay";
> +};
> +
> +&pmx0 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&sfc_pmx_func>;
> +	uart0_pmx_func: uart0_pmx_func {
> +		pinctrl-single,pins = <
> +			0x00e8 0x0
> +			0x00ec 0x0
> +		>;
> +	};
> +
> +	sfc_pmx_func: sfc_pmx_func {
> +		pinctrl-single,pins = <
> +			0x00c4 0x1
> +			0x00c8 0x1
> +			0x00cc 0x1
> +			0x00d0 0x1
> +			0x00d4 0x1
> +		>;
> +	};
> +};
> +
> +&pmx1 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&sfc_cfg_func>;
> +	uart0_cfg_func: uart0_cfg_func {
> +		pinctrl-single,pins = <
> +			0x00e8 0x0
> +			0x00ec 0x0
> +		>;
> +	};

Blank line

> +	sfc_cfg_func: sfc_cfg_func {
> +		pinctrl-single,pins = <
> +			0x00c4 0x58
> +			0x00c8 0x28
> +			0x00cc 0x38
> +			0x00d0 0x38
> +			0x00d4 0x38
> +		>;
> +	};
> +};
> +
> +/* &gmac0 { */
> +/* 	#address-cells = <1>; */
> +/* 	#size-cells = <0>; */
> +/* 	phy-handle = <&phy3>; */
> +/* 	phy-mode = "rgmii"; */
> +/* 	mac-address = [00 00 00 00 00 00]; */
> +/* 	status = "okay"; */
> +/**/
> +/* 	phy3: ethernet-phy@3 { */
> +/* 		reg = <3>; */
> +/* 	}; */
> +/* }; */


? What's this?

> diff --git a/arch/arm/boot/dts/hi3521a.dtsi b/arch/arm/boot/dts/hi3521a.dtsi
> new file mode 100644
> index 000000000000..53993a32fd5d
> --- /dev/null
> +++ b/arch/arm/boot/dts/hi3521a.dtsi
> @@ -0,0 +1,423 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * Copyright (C) 2017-2022 Marty Plummer <hanetzer@startmail.com>
> + */
> +
> +#include <dt-bindings/clock/hi3521a-clock.h>
> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> +/dts-v1/;

Blank line.

> +/ {
> +	#address-cells = <1>;
> +	#size-cells = <1>;
> +
> +	cpus {
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		cpu0: cpu@0 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a7";
> +			reg = <0>;
> +			clock-frequency = <1100000000>;
> +		};
> +	};
> +
> +	timer {
> +		compatible = "arm,armv7-timer";
> +		interrupt-parent = <&gic>;
> +		interrupts = <GIC_PPI 13 0xf08>,
> +			     <GIC_PPI 14 0xf08>,
> +			     <GIC_PPI 11 0xf08>,
> +			     <GIC_PPI 10 0xf08>;

Use macros for these interrupts.

> +		clock-frequency = <24000000>;
> +	};
> +
> +	pmu {
> +		compatible = "arm,cortex-a7-pmu";
> +		interrupt-parent = <&gic>;
> +		interrupts = <GIC_SPI 54 IRQ_TYPE_LEVEL_HIGH>;
> +	};
> +
> +	gic: interrupt-controller@10301000 {
> +		compatible = "arm,pl390";
> +		#interrupt-cells = <3>;
> +		interrupt-controller;
> +		reg = <0x10301000 0x1000>, <0x10302000 0x1000>;

Put reg just after compatible. This applies to each other node as well
(if it comes with reg).

> +	};
> +
> +	xtal24m: xtal24m {

Generic node names, so one of: "clock-0" "clock-xtal24m"

> +		compatible = "fixed-clock";
> +		#clock-cells = <0>;
> +		clock-frequency = <24000000>;

This does not look like property of the SoC, so should be defined by boards.

> +	};
> +
> +	clk_3m: clk_3m {

No underscores in node names, generic node name (see above).

> +		compatible = "fixed-clock";
> +		#clock-cells = <0>;
> +		clock-frequency = <3000000>;

This does not look like property of the SoC, so should be defined by boards.

> +	};
> +
> +	soc {
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		compatible = "simple-bus";
> +		interrupt-parent = <&gic>;
> +		ranges;
> +
> +		hi_sfc: spi@10000000 {
> +			compatible = "hisilicon,hi3521a-spi-nor", "hisilicon,fmc-spi-nor";
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +			reg = <0x10000000 0x1000>, <0x14000000 0x10000>;
> +			reg-names = "control", "memory";
> +			clocks = <&crg HI3521A_FMC_CLK>;
> +			interrupts = <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>;
> +			status = "disabled";
> +		};
> +
> +		/* usb0: usb@10030000 { */
> +		/* 		compatible = "generic-ohci"; */
> +		/* 		reg = <0x10030000 0x1000>; */
> +		/* 		interrupts = <GIC_SPI 50 IRQ_TYPE_LEVEL_HIGH>; */
> +		/* 		clocks = <&crg > */
> +		/* 	}; */

No dead code please.

> +		dmac: dma-controller@10060000 {
> +			compatible = "arm,pl080", "arm,primecell";
> +			arm,primecell-periphid = <0x00041080>;
> +			reg = <0x10060000 0x1000>;
> +			interrupts = <GIC_SPI 10 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&crg HI3521A_DMAC_CLK>;
> +			clock-names = "apb_pclk";
> +			lli-bus-interface-ahb1;
> +			lli-bus-interface-ahb2;
> +			mem-bus-interface-ahb1;
> +			mem-bus-interface-ahb2;
> +			memcpy-burst-size = <256>;
> +			memcpy-bus-width = <32>;
> +			#dma-cells = <2>;
> +			status = "okay";

No need for status okay, it's by default.

> +		};
> +
> +		gmac0: ethernet@100a0000 {
> +			compatible = "hisilicon,hisi-gmac-v1";
> +			reg = <0x100a0000 0x1000>, <0x1204008c 0x4>;
> +			interrupts = <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&crg HI3521A_ETH_CLK>, <&crg HI3521A_ETH_MACIF_CLK>;
> +			clock-names = "mac_core", "mac_ifc";
> +			/* resets = <&crg 0x78 0>, <&crg 0x78 2>, <&crg 0x78 5>; */
> +			/* reset-names = "mac_core", "mac_ifc", "phy"; */
> +			/* hisilicon,phy-reset-delays-us = <10000 10000 30000>; */

No dead code.

> +			status = "disabled";
> +		};
> +
> +		dual_timer0: timer@12000000 {
> +			compatible = "arm,sp804", "arm,primecell";
> +			interrupts = <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>;

A bit weird interrupts... the same?

> +			reg = <0x12000000 0x1000>;
> +			clocks = <&sysctrl HI3521A_TIMER0_CLK>,
> +				 <&sysctrl HI3521A_TIMER1_CLK>,
> +				 <&crg HI3521A_APB_CLK>;
> +			clock-names = "timer0clk", "timer1clk", "apb_pclk";
> +			status = "disabled";
> +		};
> +
> +		dual_timer1: timer@12010000 {
> +			compatible = "arm,sp804", "arm,primecell";
> +			interrupts = <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>;
> +			reg = <0x12010000 0x1000>;
> +			clocks = <&sysctrl HI3521A_TIMER2_CLK>,
> +				 <&sysctrl HI3521A_TIMER3_CLK>,
> +				 <&crg HI3521A_APB_CLK>;
> +			clock-names = "timer0clk", "timer1clk", "apb_pclk";
> +			status = "disabled";
> +		};
> +
> +		dual_timer2: timer@12020000 {
> +			compatible = "arm,sp804", "arm,primecell";
> +			interrupts = <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>;
> +			reg = <0x12020000 0x1000>;
> +			clocks = <&sysctrl HI3521A_TIMER4_CLK>,
> +				 <&sysctrl HI3521A_TIMER5_CLK>,
> +				 <&crg HI3521A_APB_CLK>;
> +			clock-names = "timer0clk", "timer1clk", "apb_pclk";
> +			status = "disabled";
> +		};
> +
> +		dual_timer3: timer@12030000 {
> +			compatible = "arm,sp804", "arm,primecell";
> +			interrupts = <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>;
> +			reg = <0x12030000 0x1000>;
> +			clocks = <&sysctrl HI3521A_TIMER6_CLK>,
> +				 <&sysctrl HI3521A_TIMER7_CLK>,
> +				 <&crg HI3521A_APB_CLK>;
> +			clock-names = "timer0clk", "timer1clk", "apb_pclk";
> +			status = "disabled";
> +		};
> +
> +		crg: clock-reset-controller@12040000 {
> +			compatible = "hisilicon,hi3521a-crg";

Undocumented compatible.  Didn't checkpatch warn about it?

> +			#clock-cells = <1>;
> +			#reset-cells = <2>;
> +			reg = <0x12040000 0x1000>;
> +		};
> +
> +		sysctrl: system-controller@12050000 {
> +			compatible = "hisilicon,hi3521a-sysctrl", "syscon";

Same.

> +			reg = <0x12050000 0x1000>;
> +			#clock-cells = <1>;
> +			#reset-cells = <2>;
> +		};
> +
> +		reboot {
> +			compatible = "syscon-reboot";
> +			regmap = <&sysctrl>;
> +			offset = <0x4>;
> +			mask = <0xdeadbeef>;
> +		};
> +
> +		wdt0: watchdog@12070000 {
> +			compatible = "arm,sp805", "arm,primecell";
> +			arm,primecell-periphid = <0x00141805>;
> +			reg = <0x12070000 0x1000>;
> +			interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&crg HI3521A_FIXED_3M>;
> +			clock-names = "apb_pclk";
> +		};
> +
> +		uart0: serial@12080000 {
> +			compatible = "arm,pl011", "arm,primecell";
> +			reg = <0x12080000 0x1000>;
> +			interrupts = <GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&crg HI3521A_UART0_CLK>, <&crg HI3521A_UART0_CLK>;
> +			clock-names = "uartclk", "apb_pclk";
> +			dmas = <&dmac 0 1>, <&dmac 1 2>;
> +			dma-names = "rx", "tx";
> +			status = "disabled";
> +		};
> +
> +		uart1: serial@12090000 {
> +			compatible = "arm,pl011", "arm,primecell";
> +			reg = <0x12090000 0x1000>;
> +			interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&crg HI3521A_UART1_CLK>;
> +			clock-names = "apb_pclk";
> +			dmas = <&dmac 2 1>, <&dmac 3 2>;
> +			dma-names = "rx", "tx";
> +			status = "disabled";
> +		};
> +
> +		uart2: serial@120a0000 {
> +			compatible = "arm,pl011", "arm,primecell";
> +			reg = <0x120a0000 0x1000>;
> +			interrupts = <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&crg HI3521A_UART2_CLK>;
> +			clock-names = "apb_pclk";
> +			dmas = <&dmac 4 1>, <&dmac 5 2>;
> +			dma-names = "rx", "tx";
> +			status = "disabled";
> +		};
> +
> +		spi_bus0: spi@120d0000 {
> +			compatible = "arm,pl022", "arm,primecell";
> +			reg = <0x120d0000 0x1000>;
> +			arm,primecell-periphid = <0x00041022>;
> +			interrupts = <GIC_SPI 14 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&crg HI3521A_SPI0_CLK>;
> +			clock-names = "apb_pclk";
> +			dmas = <&dmac 6 1>, <&dmac 7 2>;
> +			dma-names = "rx", "tx";
> +			num-cs = <2>;
> +			status = "disabled";
> +		};
> +
> +		pmx0: pinmux@120f0000 {
> +			compatible = "pinctrl-single";
> +			reg = <0x120f0000 0x188>;
> +			#address-cells = <1>;
> +			#size-cells = <1>;
> +			#pinctrl-cells = <1>;
> +			#gpio-range-cells = <3>;
> +			ranges;
> +
> +			pinctrl-single,register-width = <32>;
> +			pinctrl-single,function-mask = <7>;
> +			/* pin base, nr pins & gpio function */
> +			pinctrl-single,gpio-range = <
> +				&range 58 4 0
> +			>;
> +
> +			range: gpio-range {
> +				#pinctrl-single,gpio-range-cells = <3>;
> +			};
> +		};
> +
> +		pmx1: pinmux@120f0800 {
> +			compatible = "pinconf-single";
> +			reg = <0x120f0800 0x1d4>;
> +			#address-cells = <1>;
> +			#size-cells = <1>;
> +			#pinctrl-cells = <1>;
> +			ranges;
> +
> +			pinctrl-single,register-width = <32>;
> +		};
> +
> +		gpio0: gpio@12150000 {
> +			compatible = "arm,pl061", "arm,primecell";
> +			reg = <0x12150000 0x1000>;
> +			interrupts = <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>;
> +			gpio-controller;
> +			#gpio-cells = <2>;
> +			interrupt-controller;
> +			#interrupt-cells = <2>;
> +			status = "disabled";
> +		};
> +
> +		gpio1: gpio@12160000 {
> +			compatible = "arm,pl061", "arm,primecell";
> +			reg = <0x12160000 0x1000>;
> +			interrupts = <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>;
> +			gpio-controller;
> +			#gpio-cells = <2>;
> +			interrupt-controller;
> +			#interrupt-cells = <2>;
> +			status = "disabled";
> +		};
> +
> +		gpio2: gpio@12170000 {
> +			compatible = "arm,pl061", "arm,primecell";
> +			reg = <0x12170000 0x1000>;
> +			interrupts = <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>;
> +			gpio-controller;
> +			#gpio-cells = <2>;
> +			interrupt-controller;
> +			#interrupt-cells = <2>;
> +			status = "disabled";
> +		};
> +
> +		gpio3: gpio@12180000 {
> +			compatible = "arm,pl061", "arm,primecell";
> +			reg = <0x12180000 0x1000>;
> +			interrupts = <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>;
> +			gpio-controller;
> +			#gpio-cells = <2>;
> +			interrupt-controller;
> +			#interrupt-cells = <2>;
> +			status = "disabled";
> +		};
> +
> +		gpio4: gpio@12190000 {
> +			compatible = "arm,pl061", "arm,primecell";
> +			reg = <0x12190000 0x1000>;
> +			interrupts = <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>;
> +			gpio-controller;
> +			#gpio-cells = <2>;
> +			interrupt-controller;
> +			#interrupt-cells = <2>;
> +			status = "disabled";
> +		};
> +
> +		gpio5: gpio@121a0000 {
> +			compatible = "arm,pl061", "arm,primecell";
> +			reg = <0x121a0000 0x1000>;
> +			interrupts = <GIC_SPI 58 IRQ_TYPE_LEVEL_HIGH>;
> +			gpio-controller;
> +			#gpio-cells = <2>;
> +			interrupt-controller;
> +			#interrupt-cells = <2>;
> +			status = "disabled";
> +		};
> +
> +		gpio6: gpio@121b0000 {
> +			compatible = "arm,pl061", "arm,primecell";
> +			reg = <0x121b0000 0x1000>;
> +			interrupts = <GIC_SPI 58 IRQ_TYPE_LEVEL_HIGH>;

Same interrupts as for other nodes? Is it correct?

> +			gpio-controller;
> +			#gpio-cells = <2>;
> +			interrupt-controller;
> +			#interrupt-cells = <2>;
> +			status = "disabled";
> +		};
> +
> +		gpio7: gpio@121c0000 {
> +			compatible = "arm,pl061", "arm,primecell";
> +			reg = <0x121c0000 0x1000>;
> +			interrupts = <GIC_SPI 58 IRQ_TYPE_LEVEL_HIGH>;
> +			gpio-controller;
> +			#gpio-cells = <2>;
> +			interrupt-controller;
> +			#interrupt-cells = <2>;
> +			status = "disabled";
> +		};
> +_MULTI_V7


Best regards,
Krzysztof