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Message-ID: <20160301114610.GB30602@leverpostej>
Date: Tue, 1 Mar 2016 11:46:11 +0000
From: Mark Rutland <mark.rutland@....com>
To: Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc: arm@...nel.org, Russell King <linux@....linux.org.uk>,
Kukjin Kim <kgene@...nel.org>,
Krzysztof Kozlowski <k.kozlowski@...sung.com>,
Heiko Stuebner <heiko@...ech.de>, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
Kumar Gala <galak@...eaurora.org>,
Andy Gross <andy.gross@...aro.org>,
Dinh Nguyen <dinguyen@...nsource.altera.com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
linux-samsung-soc@...r.kernel.org,
Rob Herring <robh+dt@...nel.org>,
David Brown <david.brown@...aro.org>,
Pawel Moll <pawel.moll@....com>, Wei Xu <xuwei5@...ilicon.com>,
linux-rockchip@...ts.infradead.org, linux-soc@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] ARM: dts: add "simple-bus" to "arm,amba-bus" compatible
nodes
On Tue, Mar 01, 2016 at 12:57:00PM +0900, Masahiro Yamada wrote:
> The "arm,amba-bus" string in the of_default_bus_match_table is
> ambiguous. This prepares for killing it off in a long run.
I don't follow the purpose of this patch.
There's no way we can remove kernel-side support for "arm,amba-bus", as
there are DTBs that rely on it.
If we're going to merge "arm,amba-bus" in the kernel with "simple-bus",
such that there is no distinction between the two, then that doesn't
require any DTBs to be updated.
The only reason I would see for changing dts files would be a subsequent
clean-up for consistency, but at that point "arm,amba-bus" could be
dropped entirely.
So this patch makes no sense to me.
Thanks,
Mark.
> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
> ---
>
> arch/arm/boot/dts/axm55xx.dtsi | 2 +-
> arch/arm/boot/dts/exynos3250.dtsi | 2 +-
> arch/arm/boot/dts/exynos4.dtsi | 2 +-
> arch/arm/boot/dts/exynos4415.dtsi | 2 +-
> arch/arm/boot/dts/exynos5250.dtsi | 2 +-
> arch/arm/boot/dts/exynos5420.dtsi | 2 +-
> arch/arm/boot/dts/exynos5440.dtsi | 2 +-
> arch/arm/boot/dts/hi3620.dtsi | 2 +-
> arch/arm/boot/dts/hip01.dtsi | 2 +-
> arch/arm/boot/dts/hisi-x5hd2.dtsi | 2 +-
> arch/arm/boot/dts/qcom-apq8064.dtsi | 2 +-
> arch/arm/boot/dts/qcom-msm8660.dtsi | 2 +-
> arch/arm/boot/dts/qcom-msm8960.dtsi | 2 +-
> arch/arm/boot/dts/rk3036.dtsi | 2 +-
> arch/arm/boot/dts/rk3228.dtsi | 2 +-
> arch/arm/boot/dts/rk3288.dtsi | 2 +-
> arch/arm/boot/dts/rk3xxx.dtsi | 2 +-
> arch/arm/boot/dts/s5pv210.dtsi | 2 +-
> arch/arm/boot/dts/socfpga.dtsi | 2 +-
> arch/arm/boot/dts/socfpga_arria10.dtsi | 2 +-
> arch/arm/boot/dts/ste-nomadik-stn8815.dtsi | 2 +-
> arch/arm/boot/dts/ste-u300.dts | 2 +-
> arch/arm/boot/dts/versatile-ab.dts | 2 +-
> 23 files changed, 23 insertions(+), 23 deletions(-)
>
> diff --git a/arch/arm/boot/dts/axm55xx.dtsi b/arch/arm/boot/dts/axm55xx.dtsi
> index ea288f0..8da4582 100644
> --- a/arch/arm/boot/dts/axm55xx.dtsi
> +++ b/arch/arm/boot/dts/axm55xx.dtsi
> @@ -107,7 +107,7 @@
> };
>
> amba {
> - compatible = "arm,amba-bus";
> + compatible = "arm,amba-bus", "simple-bus";
> #address-cells = <2>;
> #size-cells = <2>;
> ranges;
> diff --git a/arch/arm/boot/dts/exynos3250.dtsi b/arch/arm/boot/dts/exynos3250.dtsi
> index 18e3def..0ad4fa7 100644
> --- a/arch/arm/boot/dts/exynos3250.dtsi
> +++ b/arch/arm/boot/dts/exynos3250.dtsi
> @@ -381,7 +381,7 @@
> };
>
> amba {
> - compatible = "arm,amba-bus";
> + compatible = "arm,amba-bus", "simple-bus";
> #address-cells = <1>;
> #size-cells = <1>;
> ranges;
> diff --git a/arch/arm/boot/dts/exynos4.dtsi b/arch/arm/boot/dts/exynos4.dtsi
> index 045785c..d53fd78 100644
> --- a/arch/arm/boot/dts/exynos4.dtsi
> +++ b/arch/arm/boot/dts/exynos4.dtsi
> @@ -661,7 +661,7 @@
> amba {
> #address-cells = <1>;
> #size-cells = <1>;
> - compatible = "arm,amba-bus";
> + compatible = "arm,amba-bus", "simple-bus";
> interrupt-parent = <&gic>;
> ranges;
>
> diff --git a/arch/arm/boot/dts/exynos4415.dtsi b/arch/arm/boot/dts/exynos4415.dtsi
> index ad76484..35d2f99 100644
> --- a/arch/arm/boot/dts/exynos4415.dtsi
> +++ b/arch/arm/boot/dts/exynos4415.dtsi
> @@ -380,7 +380,7 @@
> };
>
> amba {
> - compatible = "arm,amba-bus";
> + compatible = "arm,amba-bus", "simple-bus";
> #address-cells = <1>;
> #size-cells = <1>;
> interrupt-parent = <&gic>;
> diff --git a/arch/arm/boot/dts/exynos5250.dtsi b/arch/arm/boot/dts/exynos5250.dtsi
> index 33e2d5f..bcaed08 100644
> --- a/arch/arm/boot/dts/exynos5250.dtsi
> +++ b/arch/arm/boot/dts/exynos5250.dtsi
> @@ -674,7 +674,7 @@
> amba {
> #address-cells = <1>;
> #size-cells = <1>;
> - compatible = "arm,amba-bus";
> + compatible = "arm,amba-bus", "simple-bus";
> interrupt-parent = <&gic>;
> ranges;
>
> diff --git a/arch/arm/boot/dts/exynos5420.dtsi b/arch/arm/boot/dts/exynos5420.dtsi
> index 48a0a55..838bde3 100644
> --- a/arch/arm/boot/dts/exynos5420.dtsi
> +++ b/arch/arm/boot/dts/exynos5420.dtsi
> @@ -327,7 +327,7 @@
> amba {
> #address-cells = <1>;
> #size-cells = <1>;
> - compatible = "arm,amba-bus";
> + compatible = "arm,amba-bus", "simple-bus";
> interrupt-parent = <&gic>;
> ranges;
>
> diff --git a/arch/arm/boot/dts/exynos5440.dtsi b/arch/arm/boot/dts/exynos5440.dtsi
> index f18b51f..5fe5639 100644
> --- a/arch/arm/boot/dts/exynos5440.dtsi
> +++ b/arch/arm/boot/dts/exynos5440.dtsi
> @@ -200,7 +200,7 @@
> amba {
> #address-cells = <1>;
> #size-cells = <1>;
> - compatible = "arm,amba-bus";
> + compatible = "arm,amba-bus", "simple-bus";
> interrupt-parent = <&gic>;
> ranges;
> };
> diff --git a/arch/arm/boot/dts/hi3620.dtsi b/arch/arm/boot/dts/hi3620.dtsi
> index 6cbb62e..7b67ffe 100644
> --- a/arch/arm/boot/dts/hi3620.dtsi
> +++ b/arch/arm/boot/dts/hi3620.dtsi
> @@ -68,7 +68,7 @@
>
> #address-cells = <1>;
> #size-cells = <1>;
> - compatible = "arm,amba-bus";
> + compatible = "arm,amba-bus", "simple-bus";
> interrupt-parent = <&gic>;
> ranges = <0 0xfc000000 0x2000000>;
>
> diff --git a/arch/arm/boot/dts/hip01.dtsi b/arch/arm/boot/dts/hip01.dtsi
> index 33130f8..0835627 100644
> --- a/arch/arm/boot/dts/hip01.dtsi
> +++ b/arch/arm/boot/dts/hip01.dtsi
> @@ -43,7 +43,7 @@
> amba {
> #address-cells = <1>;
> #size-cells = <1>;
> - compatible = "arm,amba-bus";
> + compatible = "arm,amba-bus", "simple-bus";
> ranges;
>
> uart0: uart@...01000 {
> diff --git a/arch/arm/boot/dts/hisi-x5hd2.dtsi b/arch/arm/boot/dts/hisi-x5hd2.dtsi
> index c52722b..f3a79b7 100644
> --- a/arch/arm/boot/dts/hisi-x5hd2.dtsi
> +++ b/arch/arm/boot/dts/hisi-x5hd2.dtsi
> @@ -34,7 +34,7 @@
> amba {
> #address-cells = <1>;
> #size-cells = <1>;
> - compatible = "arm,amba-bus";
> + compatible = "arm,amba-bus", "simple-bus";
> ranges;
>
> timer0: timer@...02000 {
> diff --git a/arch/arm/boot/dts/qcom-apq8064.dtsi b/arch/arm/boot/dts/qcom-apq8064.dtsi
> index ed521e8..ca93486 100644
> --- a/arch/arm/boot/dts/qcom-apq8064.dtsi
> +++ b/arch/arm/boot/dts/qcom-apq8064.dtsi
> @@ -721,7 +721,7 @@
> };
>
> amba {
> - compatible = "arm,amba-bus";
> + compatible = "arm,amba-bus", "simple-bus";
> #address-cells = <1>;
> #size-cells = <1>;
> ranges;
> diff --git a/arch/arm/boot/dts/qcom-msm8660.dtsi b/arch/arm/boot/dts/qcom-msm8660.dtsi
> index e5f7f33..e05773c 100644
> --- a/arch/arm/boot/dts/qcom-msm8660.dtsi
> +++ b/arch/arm/boot/dts/qcom-msm8660.dtsi
> @@ -167,7 +167,7 @@
> };
>
> amba {
> - compatible = "arm,amba-bus";
> + compatible = "arm,amba-bus", "simple-bus";
> #address-cells = <1>;
> #size-cells = <1>;
> ranges;
> diff --git a/arch/arm/boot/dts/qcom-msm8960.dtsi b/arch/arm/boot/dts/qcom-msm8960.dtsi
> index 51a40d8..7e7e891 100644
> --- a/arch/arm/boot/dts/qcom-msm8960.dtsi
> +++ b/arch/arm/boot/dts/qcom-msm8960.dtsi
> @@ -251,7 +251,7 @@
> };
>
> amba {
> - compatible = "arm,amba-bus";
> + compatible = "arm,amba-bus", "simple-bus";
> #address-cells = <1>;
> #size-cells = <1>;
> ranges;
> diff --git a/arch/arm/boot/dts/rk3036.dtsi b/arch/arm/boot/dts/rk3036.dtsi
> index b9567c1..c15fdf4 100644
> --- a/arch/arm/boot/dts/rk3036.dtsi
> +++ b/arch/arm/boot/dts/rk3036.dtsi
> @@ -94,7 +94,7 @@
> };
>
> amba {
> - compatible = "arm,amba-bus";
> + compatible = "arm,amba-bus", "simple-bus";
> #address-cells = <1>;
> #size-cells = <1>;
> ranges;
> diff --git a/arch/arm/boot/dts/rk3228.dtsi b/arch/arm/boot/dts/rk3228.dtsi
> index 119ff12..8b4e443 100644
> --- a/arch/arm/boot/dts/rk3228.dtsi
> +++ b/arch/arm/boot/dts/rk3228.dtsi
> @@ -96,7 +96,7 @@
> };
>
> amba {
> - compatible = "arm,amba-bus";
> + compatible = "arm,amba-bus", "simple-bus";
> #address-cells = <1>;
> #size-cells = <1>;
> ranges;
> diff --git a/arch/arm/boot/dts/rk3288.dtsi b/arch/arm/boot/dts/rk3288.dtsi
> index 8ac49f3..af111fa 100644
> --- a/arch/arm/boot/dts/rk3288.dtsi
> +++ b/arch/arm/boot/dts/rk3288.dtsi
> @@ -134,7 +134,7 @@
> };
>
> amba {
> - compatible = "arm,amba-bus";
> + compatible = "arm,amba-bus", "simple-bus";
> #address-cells = <1>;
> #size-cells = <1>;
> ranges;
> diff --git a/arch/arm/boot/dts/rk3xxx.dtsi b/arch/arm/boot/dts/rk3xxx.dtsi
> index 99eeea7..c969e84 100644
> --- a/arch/arm/boot/dts/rk3xxx.dtsi
> +++ b/arch/arm/boot/dts/rk3xxx.dtsi
> @@ -67,7 +67,7 @@
> };
>
> amba {
> - compatible = "arm,amba-bus";
> + compatible = "arm,amba-bus", "simple-bus";
> #address-cells = <1>;
> #size-cells = <1>;
> ranges;
> diff --git a/arch/arm/boot/dts/s5pv210.dtsi b/arch/arm/boot/dts/s5pv210.dtsi
> index 8344a0e..e945c343 100644
> --- a/arch/arm/boot/dts/s5pv210.dtsi
> +++ b/arch/arm/boot/dts/s5pv210.dtsi
> @@ -130,7 +130,7 @@
> amba {
> #address-cells = <1>;
> #size-cells = <1>;
> - compatible = "arm,amba-bus";
> + compatible = "arm,amba-bus", "simple-bus";
> ranges;
>
> pdma0: dma@...00000 {
> diff --git a/arch/arm/boot/dts/socfpga.dtsi b/arch/arm/boot/dts/socfpga.dtsi
> index 3ed4abd..cadc637 100644
> --- a/arch/arm/boot/dts/socfpga.dtsi
> +++ b/arch/arm/boot/dts/socfpga.dtsi
> @@ -69,7 +69,7 @@
> ranges;
>
> amba {
> - compatible = "arm,amba-bus";
> + compatible = "arm,amba-bus", "simple-bus";
> #address-cells = <1>;
> #size-cells = <1>;
> ranges;
> diff --git a/arch/arm/boot/dts/socfpga_arria10.dtsi b/arch/arm/boot/dts/socfpga_arria10.dtsi
> index cce9e50..06a8e86 100644
> --- a/arch/arm/boot/dts/socfpga_arria10.dtsi
> +++ b/arch/arm/boot/dts/socfpga_arria10.dtsi
> @@ -63,7 +63,7 @@
> ranges;
>
> amba {
> - compatible = "arm,amba-bus";
> + compatible = "arm,amba-bus", "simple-bus";
> #address-cells = <1>;
> #size-cells = <1>;
> ranges;
> diff --git a/arch/arm/boot/dts/ste-nomadik-stn8815.dtsi b/arch/arm/boot/dts/ste-nomadik-stn8815.dtsi
> index 27a333e..74732e4 100644
> --- a/arch/arm/boot/dts/ste-nomadik-stn8815.dtsi
> +++ b/arch/arm/boot/dts/ste-nomadik-stn8815.dtsi
> @@ -721,7 +721,7 @@
> };
>
> amba {
> - compatible = "arm,amba-bus";
> + compatible = "arm,amba-bus", "simple-bus";
> #address-cells = <1>;
> #size-cells = <1>;
> ranges;
> diff --git a/arch/arm/boot/dts/ste-u300.dts b/arch/arm/boot/dts/ste-u300.dts
> index 9c73ac2..763a607 100644
> --- a/arch/arm/boot/dts/ste-u300.dts
> +++ b/arch/arm/boot/dts/ste-u300.dts
> @@ -384,7 +384,7 @@
> };
>
> amba {
> - compatible = "arm,amba-bus";
> + compatible = "arm,amba-bus", "simple-bus";
> #address-cells = <1>;
> #size-cells = <1>;
> ranges;
> diff --git a/arch/arm/boot/dts/versatile-ab.dts b/arch/arm/boot/dts/versatile-ab.dts
> index 6fd7efb..01156cf 100644
> --- a/arch/arm/boot/dts/versatile-ab.dts
> +++ b/arch/arm/boot/dts/versatile-ab.dts
> @@ -148,7 +148,7 @@
> };
>
> amba {
> - compatible = "arm,amba-bus";
> + compatible = "arm,amba-bus", "simple-bus";
> #address-cells = <1>;
> #size-cells = <1>;
> ranges;
> --
> 1.9.1
>
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