From: Rob Herring <robh@kernel.org>
To: Guo Ren <ren_guo@c-sky.com>
Cc: akpm@linux-foundation.org, arnd@arndb.de,
daniel.lezcano@linaro.org, davem@davemloft.net,
gregkh@linuxfoundation.org, hch@infradead.org,
marc.zyngier@arm.com, mark.rutland@arm.com, peterz@infradead.org,
tglx@linutronix.de, linux-kernel@vger.kernel.org,
linux-arch@vger.kernel.org, devicetree@vger.kernel.org,
c-sky_gcc_upstream@c-sky.com
Subject: Re: [PATCH V8 18/21] dt-bindings: csky CPU Bindings
Date: Fri, 12 Oct 2018 06:35:51 -0500 [thread overview]
Message-ID: <20181012113551.GA17917@bogus> (raw)
Message-ID: <20181012113551.E4mNphYelOPf5XW4tV0FkI1HHOAgD6w14zosUV6IGGo@z> (raw)
In-Reply-To: <1c77e479a1dc0119912ac146b1038963b3653381.1539315391.git.ren_guo@c-sky.com>
On Fri, Oct 12, 2018 at 12:42:53PM +0800, Guo Ren wrote:
> This patch adds the documentation to describe that how to add cpu nodes in
> dts for SMP.
>
> Signed-off-by: Guo Ren <ren_guo@c-sky.com>
> Cc: Rob Herring <robh@kernel.org>
> ---
> Documentation/devicetree/bindings/csky/cpus.txt | 70 +++++++++++++++++++++++++
> 1 file changed, 70 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/csky/cpus.txt
>
> diff --git a/Documentation/devicetree/bindings/csky/cpus.txt b/Documentation/devicetree/bindings/csky/cpus.txt
> new file mode 100644
> index 0000000..ee3901d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/csky/cpus.txt
> @@ -0,0 +1,70 @@
> +==================
> +C-SKY CPU Bindings
> +==================
> +
> +The device tree allows to describe the layout of CPUs in a system through
> +the "cpus" node, which in turn contains a number of subnodes (ie "cpu")
> +defining properties for every cpu.
> +
> +Only SMP system need to care about the cpus node and single processor
> +needn't define cpus node at all.
> +
> +=====================================
> +cpus and cpu node bindings definition
> +=====================================
> +
> +- cpus node
> +
> + Description: Container of cpu nodes
> +
> + The node name must be "cpus".
> +
> + A cpus node must define the following properties:
> +
> + - #address-cells
> + Usage: required
> + Value type: <u32>
> + Definition: must be set to 1
> + - #size-cells
> + Usage: required
> + Value type: <u32>
> + Definition: must be set to 0
> +
> +- cpu node
> +
> + Description: Describes one of SMP cores
> +
> + PROPERTIES
> +
What happened to compatible?
> + - device_type
> + Usage: required
> + Value type: <string>
> + Definition: must be "cpu"
> + - reg
> + Usage: required
> + Value type: <u32>
> + Definition: CPU index
> + - status:
Drop this. It is implied.
> + Usage: required
> + Value type: <string>
> + Definition: "ok" means enable the cpu-core
> + "disabled" means disable the cpu-core
> +
> +Example:
> +--------
> +
> + cpus {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + cpu@0 {
> + device_type = "cpu";
> + reg = <0>;
> + status = "ok";
> + };
> +
> + cpu@1 {
> + device_type = "cpu";
> + reg = <1>;
> + status = "ok";
> + };
> + };
> --
> 2.7.4
>
next prev parent reply other threads:[~2018-10-12 19:07 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-12 4:42 [PATCH V8 00/21] C-SKY(csky) Linux Kernel Port Guo Ren
2018-10-12 4:42 ` Guo Ren
2018-10-12 4:42 ` [PATCH V8 01/21] csky: Build infrastructure Guo Ren
2018-10-12 4:42 ` Guo Ren
2018-10-12 4:42 ` [PATCH V8 02/21] csky: defconfig Guo Ren
2018-10-12 4:42 ` Guo Ren
2018-10-12 4:42 ` [PATCH V8 03/21] csky: Kernel booting Guo Ren
2018-10-12 4:42 ` Guo Ren
2018-10-12 4:42 ` [PATCH V8 04/21] csky: Exception handling and mm-fault Guo Ren
2018-10-12 4:42 ` Guo Ren
2018-10-12 4:42 ` [PATCH V8 05/21] csky: System Call Guo Ren
2018-10-12 4:42 ` Guo Ren
2018-10-12 4:42 ` [PATCH V8 06/21] csky: Cache and TLB routines Guo Ren
2018-10-12 4:42 ` Guo Ren
2018-10-12 4:42 ` [PATCH V8 07/21] csky: MMU and page table management Guo Ren
2018-10-12 4:42 ` Guo Ren
2018-10-12 4:42 ` [PATCH V8 08/21] csky: Process management and Signal Guo Ren
2018-10-12 4:42 ` Guo Ren
2018-10-12 4:42 ` [PATCH V8 09/21] csky: VDSO and rt_sigreturn Guo Ren
2018-10-12 4:42 ` Guo Ren
2018-10-12 4:42 ` [PATCH V8 10/21] csky: IRQ handling Guo Ren
2018-10-12 4:42 ` Guo Ren
2018-10-12 4:42 ` [PATCH V8 11/21] csky: Atomic operations Guo Ren
2018-10-12 4:42 ` Guo Ren
2018-10-12 4:42 ` [PATCH V8 12/21] csky: ELF and module probe Guo Ren
2018-10-12 4:42 ` Guo Ren
2018-10-12 4:42 ` [PATCH V8 13/21] csky: Library functions Guo Ren
2018-10-12 4:42 ` Guo Ren
2018-10-12 4:42 ` [PATCH V8 14/21] csky: User access Guo Ren
2018-10-12 4:42 ` Guo Ren
2018-10-12 4:42 ` [PATCH V8 15/21] csky: Debug and Ptrace GDB Guo Ren
2018-10-12 4:42 ` Guo Ren
2018-10-12 4:42 ` [PATCH V8 16/21] csky: SMP support Guo Ren
2018-10-12 4:42 ` Guo Ren
2018-10-12 11:09 ` Marc Zyngier
2018-10-12 11:09 ` Marc Zyngier
2018-10-13 6:10 ` Guo Ren
2018-10-13 6:10 ` Guo Ren
2018-10-12 4:42 ` [PATCH V8 17/21] csky: Misc headers Guo Ren
2018-10-12 4:42 ` Guo Ren
2018-10-12 4:42 ` [PATCH V8 18/21] dt-bindings: csky CPU Bindings Guo Ren
2018-10-12 4:42 ` Guo Ren
2018-10-12 11:35 ` Rob Herring [this message]
2018-10-12 11:35 ` Rob Herring
2018-10-12 12:18 ` Guo Ren
2018-10-12 12:18 ` Guo Ren
2018-10-12 4:42 ` [PATCH V8 19/21] dt-bindings: Add vendor prefix for csky Guo Ren
2018-10-12 4:42 ` Guo Ren
2018-10-12 4:42 ` [PATCH V8 20/21] MAINTAINERS: Add csky Guo Ren
2018-10-12 4:42 ` Guo Ren
2018-10-12 4:42 ` [PATCH V8 21/21] csky: add support get_user_size access dword Guo Ren
2018-10-12 4:42 ` Guo Ren
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