From: Guo Ren <ren_guo@c-sky.com>
To: 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,
robh@kernel.org, tglx@linutronix.de
Cc: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
devicetree@vger.kernel.org, robh+dt@kernel.org,
c-sky_gcc_upstream@c-sky.com, Guo Ren <ren_guo@c-sky.com>
Subject: [PATCH V8 18/21] dt-bindings: csky CPU Bindings
Date: Fri, 12 Oct 2018 12:42:53 +0800 [thread overview]
Message-ID: <1c77e479a1dc0119912ac146b1038963b3653381.1539315391.git.ren_guo@c-sky.com> (raw)
Message-ID: <20181012044253.XGsfCsFNZRS01lr550Aa6OQ9jcPAIgnwf_CcPtNHyho@z> (raw)
In-Reply-To: <cover.1539315390.git.ren_guo@c-sky.com>
In-Reply-To: <cover.1539315390.git.ren_guo@c-sky.com>
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
+
+ - device_type
+ Usage: required
+ Value type: <string>
+ Definition: must be "cpu"
+ - reg
+ Usage: required
+ Value type: <u32>
+ Definition: CPU index
+ - status:
+ 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 17:36 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 ` Guo Ren [this message]
2018-10-12 4:42 ` [PATCH V8 18/21] dt-bindings: csky CPU Bindings Guo Ren
2018-10-12 11:35 ` Rob Herring
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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