Re: [PATCH v3 4/4] ARM: dts: Add initial device tree support forEXYNOS5410

[Tarek Dakhran]

Hi,

On 10.11.2013 22:02, Tomasz Figa wrote:
> Hi,
>
> Please see my comments inline.
>
> On Thursday 07 of November 2013 12:12:49 Vyacheslav Tyrtov wrote:
> > From: Tarek Dakhran <t.dakhran@xxxxxxxxxxx>
> >
> > Add initial device tree nodes for EXYNOS5410 SoC and SMDK5410 board.
> >
> > Signed-off-by: Tarek Dakhran <t.dakhran@xxxxxxxxxxx>
> > Signed-off-by: Vyacheslav Tyrtov <v.tyrtov@xxxxxxxxxxx>
> > ---
> >   arch/arm/boot/dts/Makefile                |   1 +
> >   arch/arm/boot/dts/exynos5410-smdk5410.dts |  65 ++++++++++
> >   arch/arm/boot/dts/exynos5410.dtsi         | 209 ++++++++++++++++++++++++++++++
> >   3 files changed, 275 insertions(+)
> >   create mode 100644 arch/arm/boot/dts/exynos5410-smdk5410.dts
> >   create mode 100644 arch/arm/boot/dts/exynos5410.dtsi
> [snip]
> > diff --git a/arch/arm/boot/dts/exynos5410-smdk5410.dts b/arch/arm/boot/dts/exynos5410-smdk5410.dts
> > new file mode 100644
> > index 0000000..06ae479
> > --- /dev/null
> > +++ b/arch/arm/boot/dts/exynos5410-smdk5410.dts
> > @@ -0,0 +1,65 @@
> > +/*
> > + * SAMSUNG SMDK5410 board device tree source
> > + *
> > + * Copyright (c) 2013 Samsung Electronics Co., Ltd.
> > + *		http://www.samsung.com
> > + *
> > + * This program is free software; you can redistribute it and/or modify
> > + * it under the terms of the GNU General Public License version 2 as
> > + * published by the Free Software Foundation.
> > +*/
> > +
> > +/dts-v1/;
> > +#include "exynos5410.dtsi"
> > +/ {
> > +	model = "Samsung SMDK5410 board based on EXYNOS5410";
> > +	compatible = "samsung,smdk5410", "samsung,exynos5410";
> > +
> > +	memory {
> > +		reg = <0x40000000 0x80000000>;
> > +	};
> > +
> > +	chosen {
> > +		bootargs = "console=ttySAC2,115200";
> > +	};
> > +
> > +	oscclk: oscclk {
> coding style: According to ePAPR recommendation, node name should
> represent hardware type, not particular instance of hardware.
>
> So instead, the preferred way would be to specify the clock using
> following layout:
>
> 	clocks {
> 		compatible = "simple-bus";
> 		#address-cells = <1>;
> 		#size-cells = <0>;
>
> 		oscclk: clock@0 {
> 			compatible = "fixed-clock";
> 			reg = <0>;
> 			#clock-cells = <0>;
> 			clock-frequency = <24000000>;
> 			clock-output-names = "fin_pll";
> 		};
> 	};
>
> > +		compatible = "fixed-clock";
> > +		#clock-cells = <0>;
> > +		clock-frequency = <24000000>;
> > +		clock-output-names = "fin_pll";
> > +	};
> [snip]
> > +
> > +};
> > diff --git a/arch/arm/boot/dts/exynos5410.dtsi b/arch/arm/boot/dts/exynos5410.dtsi
> > new file mode 100644
> > index 0000000..9921b66
> > --- /dev/null
> > +++ b/arch/arm/boot/dts/exynos5410.dtsi
> > @@ -0,0 +1,209 @@
> > +/*
> > + * SAMSUNG EXYNOS5410 SoC device tree source
> > + *
> > + * Copyright (c) 2013 Samsung Electronics Co., Ltd.
> > + *		http://www.samsung.com
> > + *
> > + * SAMSUNG EXYNOS5410 SoC device nodes are listed in this file.
> > + * EXYNOS5410 based board files can include this file and provide
> > + * values for board specfic bindings.
> > + *
> > + * This program is free software; you can redistribute it and/or modify
> > + * it under the terms of the GNU General Public License version 2 as
> > + * published by the Free Software Foundation.
> > + */
> > +
> > +#include <dt-bindings/clock/exynos5410.h>
> > +#include "exynos5.dtsi"
> > +/ {
> [snip]
> > +	clock: clock-controller@10010000 {
> > +		compatible = "samsung,exynos5410-clock";
> > +		reg = <0x10010000 0x30000>;
> > +		#clock-cells = <1>;
> > +	};
> > +
> > +	mct@101C0000 {
> A generic name would be: timer@101C0000
>
> > +		compatible = "samsung,exynos4210-mct";
> > +		reg = <0x101C0000 0xB00>;
> > +		interrupt-controller;
> > +		#interrups-cells = <1>;
> MCT is not an interrupt controller, so both interrupt-controller and
> #interrupt-cells properties are incorrect. I guess that's due to the
> broken example in the documentation, that I already posted patches to fix.
>
> > +		interrupt-parent = <&mct_map>;
> > +		interrupts = <0>, <1>, <2>, <3>,
> > +			<4>, <5>, <6>, <7>,
> > +			<8>, <9>, <10>, <11>;
> > +		clocks = <&oscclk>, <&clock CLK_MCT>;
> > +		clock-names = "fin_pll", "mct";
> > +
> > +		mct_map: mct-map {
> Again, interrupt-map would be a better name for this node.
>
> > +			#interrupt-cells = <1>;
> > +			#address-cells = <0>;
> > +			#size-cells = <0>;
> > +			interrupt-map = <0 &combiner 23 3>,
> > +					<1 &combiner 23 4>,
> > +					<2 &combiner 25 2>,
> > +					<3 &combiner 25 3>,
> > +					<4 &gic 0 120 0>,
> > +					<5 &gic 0 121 0>,
> > +					<6 &gic 0 122 0>,
> > +					<7 &gic 0 123 0>,
> > +					<8 &gic 0 128 0>,
> > +					<9 &gic 0 129 0>,
> > +					<10 &gic 0 130 0>,
> > +					<11 &gic 0 131 0>;
> > +		};
> > +	};
> Otherwise, the patch looks good.
>
> Best regards,
> Tomasz
Thanks a lot, Tomasz.
All will be corrected in v4.

Best regards,
    Tarek Dakhran
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