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Message-id: <56C3D745.7050904@samsung.com>
Date: Wed, 17 Feb 2016 11:13:25 +0900
From: Krzysztof Kozlowski <k.kozlowski@...sung.com>
To: Javier Martinez Canillas <javier@....samsung.com>,
linux-kernel@...r.kernel.org
Cc: devicetree@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
Andi Shyti <andi.shyti@...sung.com>,
Alim Akhtar <alim.akhtar@...sung.com>,
Kukjin Kim <kgene@...nel.org>,
linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2] ARM: dts: Move syscon reboot/poweroff to common dtsi
for Exynos
On 17.02.2016 00:25, Javier Martinez Canillas wrote:
> All Exynos SoCs have the same syscon reboot and poweroff device nodes so
> there is no need to duplicate the same on each SoC dtsi and can be moved
> to a common dtsi that can be included by all the SoCs dtsi files.
>
> Suggested-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
> Signed-off-by: Javier Martinez Canillas <javier@....samsung.com>
> Reviewed-by: Alim Akhtar <alim.akhtar@...sung,com>
>
> ---
> Hello,
>
> The patch was tested on an Exynos5800 Peach Pi Chromebook and an
> Exynos5422 Odroid XU4 board. Reboot and poweroff worked for both.
>
> But testing on Exynos3 and Exynos4 will be highly appreciated.
>
> Best regards,
> Javier
>
> Changes in v2:
> - Added Krzysztof Kozlowski's Suggested-by tag.
> - Added Alim Akhtar's Reviewed-by tag.
> - Moved the poweroff and reboot nodes under a soc node (Krzysztof Kozlowski).
> - Include the dtsi after skeleton dtsi in exynos4.dtsi ((Krzysztof Kozlowski).
>
> arch/arm/boot/dts/exynos-syscon-restart.dtsi | 27 +++++++++++++++++++++++++++
> arch/arm/boot/dts/exynos3250.dtsi | 15 +--------------
> arch/arm/boot/dts/exynos4.dtsi | 15 +--------------
> arch/arm/boot/dts/exynos5.dtsi | 15 +--------------
> arch/arm/boot/dts/exynos5410.dtsi | 15 +--------------
> 5 files changed, 31 insertions(+), 56 deletions(-)
> create mode 100644 arch/arm/boot/dts/exynos-syscon-restart.dtsi
>
> diff --git a/arch/arm/boot/dts/exynos-syscon-restart.dtsi b/arch/arm/boot/dts/exynos-syscon-restart.dtsi
> new file mode 100644
> index 000000000000..09a2040054ed
> --- /dev/null
> +++ b/arch/arm/boot/dts/exynos-syscon-restart.dtsi
> @@ -0,0 +1,27 @@
> +/*
> + * Samsung's Exynos SoC syscon reboot/poweroff nodes common definition.
> + *
> + * 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.
> + */
> +
> +/ {
> + soc {
> + compatible = "simple-bus";
The exynos4 does not have soc node. I wonder whether we should provide
here also address and size:
#address-cells = <1>;
#size-cells = <1>;
ranges;
Without this it works fine but that does not look correct enough.
A minor effect of this patch on Exynos4 is that syscon-poweroff/reboot
are now the only children of "soc" simple-bus (rest of platform devices
is not)... but this is not a problem.
Works fine so only the question about cells/ranges remains. Any comments?
Best regards,
Krzysztof
> +
> + poweroff: syscon-poweroff {
> + compatible = "syscon-poweroff";
> + regmap = <&pmu_system_controller>;
> + offset = <0x330C>; /* PS_HOLD_CONTROL */
> + mask = <0x5200>; /* reset value */
> + };
> +
> + reboot: syscon-reboot {
> + compatible = "syscon-reboot";
> + regmap = <&pmu_system_controller>;
> + offset = <0x0400>; /* SWRESET */
> + mask = <0x1>;
> + };
> + };
> +};
> diff --git a/arch/arm/boot/dts/exynos3250.dtsi b/arch/arm/boot/dts/exynos3250.dtsi
> index 18e3deffbf48..d9c221517935 100644
> --- a/arch/arm/boot/dts/exynos3250.dtsi
> +++ b/arch/arm/boot/dts/exynos3250.dtsi
> @@ -19,6 +19,7 @@
>
> #include "skeleton.dtsi"
> #include "exynos4-cpu-thermal.dtsi"
> +#include "exynos-syscon-restart.dtsi"
> #include <dt-bindings/clock/exynos3250.h>
>
> / {
> @@ -152,20 +153,6 @@
> interrupt-parent = <&gic>;
> };
>
> - poweroff: syscon-poweroff {
> - compatible = "syscon-poweroff";
> - regmap = <&pmu_system_controller>;
> - offset = <0x330C>; /* PS_HOLD_CONTROL */
> - mask = <0x5200>; /* Reset value */
> - };
> -
> - reboot: syscon-reboot {
> - compatible = "syscon-reboot";
> - regmap = <&pmu_system_controller>;
> - offset = <0x0400>; /* SWRESET */
> - mask = <0x1>;
> - };
> -
> mipi_phy: video-phy@...20710 {
> compatible = "samsung,s5pv210-mipi-video-phy";
> #phy-cells = <1>;
> diff --git a/arch/arm/boot/dts/exynos4.dtsi b/arch/arm/boot/dts/exynos4.dtsi
> index ca621a92319e..5456094d2f45 100644
> --- a/arch/arm/boot/dts/exynos4.dtsi
> +++ b/arch/arm/boot/dts/exynos4.dtsi
> @@ -22,6 +22,7 @@
> #include <dt-bindings/clock/exynos4.h>
> #include <dt-bindings/clock/exynos-audss-clk.h>
> #include "skeleton.dtsi"
> +#include "exynos-syscon-restart.dtsi"
>
> / {
> interrupt-parent = <&gic>;
> @@ -163,20 +164,6 @@
> interrupt-parent = <&gic>;
> };
>
> - poweroff: syscon-poweroff {
> - compatible = "syscon-poweroff";
> - regmap = <&pmu_system_controller>;
> - offset = <0x330C>; /* PS_HOLD_CONTROL */
> - mask = <0x5200>; /* reset value */
> - };
> -
> - reboot: syscon-reboot {
> - compatible = "syscon-reboot";
> - regmap = <&pmu_system_controller>;
> - offset = <0x0400>; /* SWRESET */
> - mask = <0x1>;
> - };
> -
> dsi_0: dsi@...80000 {
> compatible = "samsung,exynos4210-mipi-dsi";
> reg = <0x11C80000 0x10000>;
> diff --git a/arch/arm/boot/dts/exynos5.dtsi b/arch/arm/boot/dts/exynos5.dtsi
> index b61d1f637510..92313cac035e 100644
> --- a/arch/arm/boot/dts/exynos5.dtsi
> +++ b/arch/arm/boot/dts/exynos5.dtsi
> @@ -14,6 +14,7 @@
> */
>
> #include "skeleton.dtsi"
> +#include "exynos-syscon-restart.dtsi"
>
> / {
> interrupt-parent = <&gic>;
> @@ -93,20 +94,6 @@
> status = "disabled";
> };
>
> - poweroff: syscon-poweroff {
> - compatible = "syscon-poweroff";
> - regmap = <&pmu_system_controller>;
> - offset = <0x330C>; /* PS_HOLD_CONTROL */
> - mask = <0x5200>; /* reset value */
> - };
> -
> - reboot: syscon-reboot {
> - compatible = "syscon-reboot";
> - regmap = <&pmu_system_controller>;
> - offset = <0x0400>; /* SWRESET */
> - mask = <0x1>;
> - };
> -
> fimd: fimd@...00000 {
> compatible = "samsung,exynos5250-fimd";
> interrupt-parent = <&combiner>;
> diff --git a/arch/arm/boot/dts/exynos5410.dtsi b/arch/arm/boot/dts/exynos5410.dtsi
> index f3490f567344..fa558674ac76 100644
> --- a/arch/arm/boot/dts/exynos5410.dtsi
> +++ b/arch/arm/boot/dts/exynos5410.dtsi
> @@ -14,6 +14,7 @@
> */
>
> #include "skeleton.dtsi"
> +#include "exynos-syscon-restart.dtsi"
> #include <dt-bindings/clock/exynos5410.h>
>
> / {
> @@ -117,20 +118,6 @@
> reg = <0x10040000 0x5000>;
> };
>
> - poweroff: syscon-poweroff {
> - compatible = "syscon-poweroff";
> - regmap = <&pmu_system_controller>;
> - offset = <0x330C>; /* PS_HOLD_CONTROL */
> - mask = <0x5200>; /* reset value */
> - };
> -
> - reboot: syscon-reboot {
> - compatible = "syscon-reboot";
> - regmap = <&pmu_system_controller>;
> - offset = <0x0400>; /* SWRESET */
> - mask = <0x1>;
> - };
> -
> mct: mct@...C0000 {
> compatible = "samsung,exynos4210-mct";
> reg = <0x101C0000 0xB00>;
>
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