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Date: Tue, 2 Dec 2014 11:09:09 +0000
From: Mark Rutland <mark.rutland@....com>
To: Chanwoo Choi <cw00.choi@...sung.com>
Cc: "linux-samsung-soc@...r.kernel.org"
<linux-samsung-soc@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"kgene.kim@...sung.com" <kgene.kim@...sung.com>,
Marc Zyngier <Marc.Zyngier@....com>,
"arnd@...db.de" <arnd@...db.de>, "olof@...om.net" <olof@...om.net>,
Catalin Marinas <Catalin.Marinas@....com>,
Will Deacon <Will.Deacon@....com>,
"s.nawrocki@...sung.com" <s.nawrocki@...sung.com>,
"tomasz.figa@...il.com" <tomasz.figa@...il.com>,
"kyungmin.park@...sung.com" <kyungmin.park@...sung.com>,
"inki.dae@...sung.com" <inki.dae@...sung.com>,
"chanho61.park@...sung.com" <chanho61.park@...sung.com>,
"geunsik.lim@...sung.com" <geunsik.lim@...sung.com>,
"sw0312.kim@...sung.com" <sw0312.kim@...sung.com>,
"jh80.chung@...sung.com" <jh80.chung@...sung.com>,
"a.kesavan@...sung.com" <a.kesavan@...sung.com>,
"pankaj.dubey@...sung.com" <pankaj.dubey@...sung.com>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 14/19] arm64: dts: exynos: Add dts files for 64-bit
Exynos5433 SoC
Hi,
On Tue, Dec 02, 2014 at 08:49:51AM +0000, Chanwoo Choi wrote:
> This patch adds new Exynos5433 dtsi to support 64-bit Exynos5433 SoC based on
> Octal core CPUs (quad Cortex-A57 and quad Cortex-A53). And Exynos5433 supports
> PSCI (Power State Coordination Interface) v0.1.
>
> Cc: Kukjin Kim <kgene.kim@...sung.com>
> Cc: Mark Rutland <mark.rutland@....com>
> Cc: Marc Zyngier <marc.zyngier@....com>
> Cc: Arnd Bergmann <arnd@...db.de>
> Cc: Olof Johansson <olof@...om.net>
> Cc: Catalin Marinas <catalin.marinas@....com>
> Cc: Will Deacon <will.deacon@....com>
> Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
> Acked-by: Inki Dae <inki.dae@...sung.com>
> Acked-by: Geunsik Lim <geunsik.lim@...sung.com>
> ---
> arch/arm64/boot/dts/exynos/exynos5433-pinctrl.dtsi | 698 +++++++++++++++++++++
> arch/arm64/boot/dts/exynos/exynos5433.dtsi | 515 +++++++++++++++
> 2 files changed, 1213 insertions(+)
> create mode 100644 arch/arm64/boot/dts/exynos/exynos5433-pinctrl.dtsi
> create mode 100644 arch/arm64/boot/dts/exynos/exynos5433.dtsi
[...]
> + cpus {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + cpu0: cpu@100 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a53", "arm,armv8";
> + enable-method = "psci";
> + reg = <0x100>;
> + };
> +
> + cpu1: cpu@101 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a53", "arm,armv8";
> + enable-method = "psci";
> + reg = <0x101>;
> + };
> +
> + cpu2: cpu@102 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a53", "arm,armv8";
> + enable-method = "psci";
> + reg = <0x0 0x102>;
> + };
> +
> + cpu3: cpu@103 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a53", "arm,armv8";
> + enable-method = "psci";
> + reg = <0x103>;
> + };
> +
> + cpu4: cpu@0 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a57", "arm,armv8";
> + enable-method = "psci";
> + reg = <0x0>;
> + };
> +
> + cpu5: cpu@1 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a57", "arm,armv8";
> + enable-method = "psci";
> + reg = <0x1>;
> + };
> +
> + cpu6: cpu@2 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a57", "arm,armv8";
> + enable-method = "psci";
> + reg = <0x2>;
> + };
> +
> + cpu7: cpu@3 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a57", "arm,armv8";
> + enable-method = "psci";
> + reg = <0x3>;
> + };
> + };
> +
> + psci {
> + compatible = "arm,psci";
> + method = "smc";
> + cpu_off = <0x84000002>;
> + cpu_on = <0xC4000003>;
> + };
Given your comments on the latest posting, has CPU_OFF been tested, and
does it work for _all_ CPUs (including CPU0)?
> +
> + soc: soc {
> + compatible = "simple-bus";
> + #address-cells = <1>;
> + #size-cells = <1>;
> + ranges;
Is that valid when changing the number of cells? The address spaces
aren't strictly identical in that case, and I'd expect a translation
something like:
ranges = <0x0 0x0 0x0 0xff000000>;
Where the final cell is a sufficiently large value to cover all
addresses in the soc node.
[...]
> + gic:interrupt-controller@...01000 {
> + compatible = "arm,gic-400";
> + #interrupt-cells = <3>;
> + interrupt-controller;
> + reg = <0x11001000 0x1000>,
> + <0x11002000 0x1000>,
> + <0x11004000 0x2000>,
> + <0x11006000 0x2000>;
> + interrupts = <1 9 0xf04>;
> + };
The GICC needs to be 0x2000 long to map the GICC_DIR, which is at
0x1000-0x1003.
[...]
> + pinctrl_alive: pinctrl@...80000 {
> + compatible = "samsung,exynos5433-pinctrl";
> + reg = <0x10580000 0x1000>;
> +
> + wakeup-interrupt-controller {
> + compatible = "samsung,exynos7-wakeup-eint";
> + interrupts = <0 16 0>;
> + };
> + };
How exactly does the wakeup interrupt controller interact with the GIC?
Surely the relationship between the two should be described?
Is it a subcomponent of the pincontrol block?
Thanks,
Mark.
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