Re: [PATCH v7 2/3] arm: dts: add Nuvoton NPCM750 device tree

From: Rob Herring
Date: Fri Oct 20 2017 - 15:46:26 EST

On Thu, Oct 19, 2017 at 5:50 PM, Brendan Higgins
<brendanhiggins@xxxxxxxxxx> wrote:
> Add a common device tree for all Nuvoton NPCM750 BMCs and a board
> specific device tree for the NPCM750 (Poleg) evaluation board.
>
> Signed-off-by: Brendan Higgins <brendanhiggins@xxxxxxxxxx>
> Reviewed-by: Tomer Maimon <tmaimon77@xxxxxxxxx>
> Reviewed-by: Avi Fishman <avifishman70@xxxxxxxxx>
> Reviewed-by: Joel Stanley <joel@xxxxxxxxx>
> Tested-by: Tomer Maimon <tmaimon77@xxxxxxxxx>
> Tested-by: Avi Fishman <avifishman70@xxxxxxxxx>
> ---

[...]

> diff --git a/arch/arm/boot/dts/nuvoton-npcm750.dtsi b/arch/arm/boot/dts/nuvoton-npcm750.dtsi
> new file mode 100644
> index 000000000000..85506b3cdd39
> --- /dev/null
> +++ b/arch/arm/boot/dts/nuvoton-npcm750.dtsi
> @@ -0,0 +1,198 @@
> +/*
> + * DTSi file for the NPCM750 SoC
> + *
> + * Copyright 2012 Tomer Maimon <tomer.maimon@xxxxxxxxxxx>
> + *
> + * The code contained herein is licensed under the GNU General Public
> + * License. You may obtain a copy of the GNU General Public License
> + * Version 2 or later at the following locations:
> + *
> + * http://www.opensource.org/licenses/gpl-license.html
> + * http://www.gnu.org/copyleft/gpl.html
> + */
> +
> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> +#include <dt-bindings/clock/nuvoton,npcm7xx-clks.h>
> +
> +/ {
> + #address-cells = <1>;
> + #size-cells = <1>;
> + interrupt-parent = <&gic>;
> +
> + cpus {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + enable-method = "nuvoton,npcm7xx-smp";
> +
> + cpu@0 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a9";
> + clocks = <&clk NPCM7XX_CLK_CPU>;
> + clock-names = "clk_cpu";
> + reg = <0>;
> + next-level-cache = <&l2>;
> + };
> +
> + cpu@1 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a9";
> + clocks = <&clk NPCM7XX_CLK_CPU>;
> + clock-names = "clk_cpu";
> + reg = <1>;
> + next-level-cache = <&l2>;
> + };
> + };
> +
> +/* external clock signal rg1refck, supplied by the phy */
> +clk-rg1refck {
> + compatible = "fixed-clock";
> + #clock-cells = <0>;
> + clock-frequency = <125000000>;
> +};
> +
> +/* external clock signal rg2refck, supplied by the phy */
> +clk-rg2refck {
> + compatible = "fixed-clock";
> + #clock-cells = <0>;
> + clock-frequency = <125000000>;
> +};
> +
> +clk-xin {
> + compatible = "fixed-clock";
> + #clock-cells = <0>;
> + clock-frequency = <50000000>;
> +};
> +
> + soc {
> + #address-cells = <1>;
> + #size-cells = <1>;
> + compatible = "simple-bus";
> + interrupt-parent = <&gic>;
> + ranges = <0x0 0xf0000000 0x00900000>;
> +
> + gcr: gcr@f0800000 {

Should be gcr@800000. Build the dtb with W=1 and it will give you
warnings for this.

> + compatible = "nuvoton,npcm750-gcr", "syscon",
> + "simple-mfd";
> + reg = <0x800000 0x1000>;
> + };
> +
> + scu: scu@f03fe000 {
> + compatible = "arm,cortex-a9-scu";
> + reg = <0x3fe000 0x1000>;
> + };
> +
> + l2: cache-controller@f03fc000 {
> + compatible = "arm,pl310-cache";
> + reg = <0x3fc000 0x1000>;
> + interrupts = <0 21 4>;
> + cache-unified;
> + cache-level = <2>;
> + clocks = <&clk NPCM7XX_CLK_AXI>;
> + };
> +
> + gic: interrupt-controller@f03ff000 {
> + compatible = "arm,cortex-a9-gic";
> + interrupt-controller;
> + #interrupt-cells = <3>;
> + reg = <0x3ff000 0x1000>,
> + <0x3fe100 0x100>;
> + };
> +
> + timer@f03fe600 {
> + compatible = "arm,cortex-a9-twd-timer";
> + reg = <0x3fe600 0x20>;
> + interrupts = <1 13 0x304>;
> + clocks = <&clk NPCM7XX_CLK_TIMER>;
> + };
> + };
> +
> + ahb {
> + #address-cells = <1>;
> + #size-cells = <1>;
> + compatible = "simple-bus";
> + interrupt-parent = <&gic>;
> + ranges = <0x80000000 0x80000000 0x40010000
> + 0xe0800000 0xe0800000 0x0f800000
> + 0x00000000 0xf0000000 0x00900000
> + 0xf8000000 0xf8000000 0x02000000
> + 0xfb000000 0xfb000000 0x00002000>;

Just do "ranges;" here if all the translation is at the next level down.

Sorry, it's hard to say exactly what to do without knowing the whole memory map.

> +
> + clk: clock-controller@f0801000 {

Seems like this belongs under /soc based on the address.

> + compatible = "nuvoton,npcm750-clk";
> + #clock-cells = <1>;
> + reg = <0x801000 0x1000>;
> + status = "okay";
> + };
> +
> + apb {
> + #address-cells = <1>;
> + #size-cells = <1>;
> + compatible = "simple-bus";
> + interrupt-parent = <&gic>;
> + ranges = <0x0 0x0 0x00300000>;

And then this would be "<0x0 0xf0000000 0x300000>".

> +
> + timer0: timer@f0000000 {
> + compatible = "nuvoton,npcm750-timer";
> + interrupts = <0 32 4>;
> + reg = <0x0 0x1000>;
> + clocks = <&clk NPCM7XX_CLK_TIMER>;
> + };
> +
> + watchdog0: watchdog@f0008000 {
> + compatible = "nuvoton,npcm750-wdt";
> + interrupts = <0 47 4>;
> + reg = <0x8000 0x1000>;
> + status = "disabled";
> + clocks = <&clk NPCM7XX_CLK_TIMER>;
> + };
> +
> + watchdog1: watchdog@f0009000 {
> + compatible = "nuvoton,npcm750-wdt";
> + interrupts = <0 48 4>;
> + reg = <0x9000 0x1000>;
> + status = "disabled";
> + clocks = <&clk NPCM7XX_CLK_TIMER>;
> + };
> +
> + watchdog2: watchdog@f000a000 {
> + compatible = "nuvoton,npcm750-wdt";
> + interrupts = <0 49 4>;
> + reg = <0xa000 0x1000>;
> + status = "disabled";
> + clocks = <&clk NPCM7XX_CLK_TIMER>;
> + };
> +
> + serial0: serial@f0001000 {
> + compatible = "nuvoton,npcm750-uart";
> + reg = <0x1000 0x1000>;
> + clocks = <&clk NPCM7XX_CLK_UART_CORE>;
> + interrupts = <0 2 4>;
> + status = "disabled";
> + };
> +
> + serial1: serial@f0002000 {
> + compatible = "nuvoton,npcm750-uart";
> + reg = <0x2000 0x1000>;
> + clocks = <&clk NPCM7XX_CLK_UART_CORE>;
> + interrupts = <0 3 4>;
> + status = "disabled";
> + };
> +
> + serial2: serial@f0003000 {
> + compatible = "nuvoton,npcm750-uart";
> + reg = <0x3000 0x1000>;
> + clocks = <&clk NPCM7XX_CLK_UART_CORE>;
> + interrupts = <0 4 4>;
> + status = "disabled";
> + };
> +
> + serial3: serial@f0004000 {
> + compatible = "nuvoton,npcm750-uart";
> + reg = <0x4000 0x1000>;
> + clocks = <&clk NPCM7XX_CLK_UART_CORE>;
> + interrupts = <0 5 4>;
> + status = "disabled";
> + };
> + };
> + };
> +};
> diff --git a/include/dt-bindings/clock/nuvoton,npcm7xx-clks.h b/include/dt-bindings/clock/nuvoton,npcm7xx-clks.h
> new file mode 100644
> index 000000000000..c69d3bbf7e42
> --- /dev/null
> +++ b/include/dt-bindings/clock/nuvoton,npcm7xx-clks.h
> @@ -0,0 +1,39 @@
> +/*
> + * Copyright (C) 2016 Nuvoton Technologies, tali.perry@xxxxxxxxxxx
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License version 2, as published by the Free Software Foundation, and
> + * may be copied, distributed, and modified under those terms.
> + */
> +
> +#ifndef _DT_BINDINGS_CLK_NPCM7XX_H
> +#define _DT_BINDINGS_CLK_NPCM7XX_H
> +
> +#define NPCM7XX_CLK_PLL0 0
> +#define NPCM7XX_CLK_PLL1 1
> +#define NPCM7XX_CLK_PLL2 2
> +#define NPCM7XX_CLK_GFX 3
> +#define NPCM7XX_CLK_APB1 4
> +#define NPCM7XX_CLK_APB2 5
> +#define NPCM7XX_CLK_APB3 6
> +#define NPCM7XX_CLK_APB4 7
> +#define NPCM7XX_CLK_APB5 8
> +#define NPCM7XX_CLK_MC 9
> +#define NPCM7XX_CLK_CPU 10
> +#define NPCM7XX_CLK_SPI0 11
> +#define NPCM7XX_CLK_SPI3 12
> +#define NPCM7XX_CLK_SPIX 13
> +#define NPCM7XX_CLK_UART_CORE 14
> +#define NPCM7XX_CLK_TIMER 15
> +#define NPCM7XX_CLK_HOST_UART 16
> +#define NPCM7XX_CLK_MMC 17
> +#define NPCM7XX_CLK_SDHC 18
> +#define NPCM7XX_CLK_ADC 19
> +#define NPCM7XX_CLK_GFX_MEM 20
> +#define NPCM7XX_CLK_USB_BRIDGE 21
> +#define NPCM7XX_CLK_AXI 22
> +#define NPCM7XX_CLK_AHB 23
> +#define NPCM7XX_CLK_EMC 24
> +#define NPCM7XX_CLK_GMAC 25
> +
> +#endif
> --
> 2.15.0.rc0.271.g36b669edcc-goog
>