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, jason@lakedaemon.net,
marc.zyngier@arm.com, mark.rutland@arm.com,
mchehab+samsung@kernel.org, peterz@infradead.org,
robh@kernel.org, robh+dt@kernel.org, tglx@linutronix.de
Cc: green.hu@gmail.com, linux-kernel@vger.kernel.org,
linux-arch@vger.kernel.org, devicetree@vger.kernel.org,
c-sky_gcc_upstream@c-sky.com, Guo Ren <ren_guo@c-sky.com>
Subject: [PATCH V7 18/20] dt-bindings: csky CPU Bindings
Date: Fri, 5 Oct 2018 16:33:14 +0800 [thread overview]
Message-ID: <994158389acaf01d065bf1460eb51b3b7249bd07.1538715563.git.ren_guo@c-sky.com> (raw)
Message-ID: <20181005083314.cWxXD-bzOtN6Mq4mDiUJChmcubS6UXIzhfQ4Sdcwshk@z> (raw)
In-Reply-To: <cover.1538715563.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>
---
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:[~2018-10-05 15:31 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-05 5:41 [PATCH V7 00/20] C-SKY(csky) Linux Kernel Port Guo Ren
2018-10-05 5:41 ` Guo Ren
2018-10-05 5:41 ` [PATCH V7 01/20] csky: Build infrastructure Guo Ren
2018-10-05 5:41 ` Guo Ren
2018-10-05 5:41 ` [PATCH V7 02/20] csky: defconfig Guo Ren
2018-10-05 5:41 ` Guo Ren
2018-10-05 5:41 ` [PATCH V7 03/20] csky: Kernel booting Guo Ren
2018-10-05 5:41 ` Guo Ren
2018-10-05 5:41 ` [PATCH V7 04/20] csky: Exception handling and mm-fault Guo Ren
2018-10-05 5:41 ` Guo Ren
2018-10-05 5:41 ` [PATCH V7 05/20] csky: System Call Guo Ren
2018-10-05 5:41 ` Guo Ren
2018-10-05 5:41 ` [PATCH V7 06/20] csky: Cache and TLB routines Guo Ren
2018-10-05 5:41 ` Guo Ren
2018-10-05 5:41 ` [PATCH V7 07/20] csky: MMU and page table management Guo Ren
2018-10-05 5:41 ` Guo Ren
2018-10-05 5:41 ` [PATCH V7 08/20] csky: Process management and Signal Guo Ren
2018-10-05 5:41 ` Guo Ren
2018-10-05 5:41 ` [PATCH V7 09/20] csky: VDSO and rt_sigreturn Guo Ren
2018-10-05 5:41 ` Guo Ren
2018-10-05 5:41 ` [PATCH V7 10/20] csky: IRQ handling Guo Ren
2018-10-05 5:41 ` Guo Ren
2018-10-05 5:41 ` [PATCH V7 11/20] csky: Atomic operations Guo Ren
2018-10-05 5:41 ` Guo Ren
2018-10-05 5:41 ` [PATCH V7 12/20] csky: ELF and module probe Guo Ren
2018-10-05 5:41 ` Guo Ren
2018-10-05 5:41 ` [PATCH V7 13/20] csky: Library functions Guo Ren
2018-10-05 5:41 ` Guo Ren
2018-10-05 5:41 ` [PATCH V7 14/20] csky: User access Guo Ren
2018-10-05 5:41 ` Guo Ren
2018-10-05 5:41 ` [PATCH V7 15/20] csky: Debug and Ptrace GDB Guo Ren
2018-10-05 5:41 ` Guo Ren
2018-10-05 5:41 ` [PATCH V7 16/20] csky: SMP support Guo Ren
2018-10-05 5:41 ` Guo Ren
2018-10-05 5:41 ` [PATCH V7 17/20] csky: Misc headers Guo Ren
2018-10-05 5:41 ` Guo Ren
2018-10-05 8:33 ` Guo Ren [this message]
2018-10-05 8:33 ` [PATCH V7 18/20] dt-bindings: csky CPU Bindings Guo Ren
2018-10-05 8:33 ` [PATCH V7 19/20] dt-bindings: Add vendor prefix for csky Guo Ren
2018-10-05 8:33 ` Guo Ren
2018-10-05 8:33 ` [PATCH V7 20/20] MAINTAINERS: Add csky Guo Ren
2018-10-05 8:33 ` Guo Ren
2018-10-06 20:06 ` [PATCH V7 00/20] C-SKY(csky) Linux Kernel Port Eugene Syromiatnikov
2018-10-06 20:06 ` Eugene Syromiatnikov
2018-10-07 4:48 ` Guo Ren
2018-10-07 4:48 ` Guo Ren
2018-10-07 5:44 ` Eugene Syromiatnikov
2018-10-07 5:44 ` Eugene Syromiatnikov
2018-10-07 10:41 ` Guo Ren
2018-10-07 10:41 ` Guo Ren
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