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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 V9 18/21] dt-bindings: csky CPU Bindings
Date: Tue, 16 Oct 2018 10:58:37 +0800	[thread overview]
Message-ID: <867b2328e3dbaef58d0b5e7fc58e8545d1510951.1539655732.git.ren_guo@c-sky.com> (raw)
In-Reply-To: <cover.1539655731.git.ren_guo@c-sky.com>
In-Reply-To: <cover.1539655731.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>
---
Changelog:
 - Add compatible.
 - Remove status part.
---
---
 Documentation/devicetree/bindings/csky/cpus.txt | 73 +++++++++++++++++++++++++
 1 file changed, 73 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..ae79412
--- /dev/null
+++ b/Documentation/devicetree/bindings/csky/cpus.txt
@@ -0,0 +1,73 @@
+==================
+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
+	- compatible:
+		Usage: required
+		Value type: <string>
+		Definition: must contain "csky", eg:
+			"csky,610"
+			"csky,807"
+			"csky,810"
+			"csky,860"
+
+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


  parent reply	other threads:[~2018-10-16  3:30 UTC|newest]

Thread overview: 68+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-16  2:58 [PATCH V9 00/21] C-SKY(csky) Linux Kernel Port Guo Ren
2018-10-16  2:58 ` [PATCH V9 01/21] csky: Build infrastructure Guo Ren
2018-10-23  0:08   ` Guo Ren
2018-10-24 22:53     ` Arnd Bergmann
2018-10-25 17:04       ` Guo Ren
2018-10-16  2:58 ` [PATCH V9 02/21] csky: defconfig Guo Ren
2018-10-17 14:56   ` Arnd Bergmann
2018-10-16  2:58 ` [PATCH V9 03/21] csky: Kernel booting Guo Ren
2018-10-17 14:58   ` Arnd Bergmann
2018-10-16  2:58 ` [PATCH V9 04/21] csky: Exception handling and mm-fault Guo Ren
2018-10-17 14:59   ` Arnd Bergmann
2018-10-16  2:58 ` [PATCH V9 05/21] csky: System Call Guo Ren
2018-10-17 15:02   ` Arnd Bergmann
2018-10-18  2:02     ` Guo Ren
2018-10-16  2:58 ` [PATCH V9 06/21] csky: Cache and TLB routines Guo Ren
2018-10-17 15:08   ` Arnd Bergmann
2018-10-16  2:58 ` [PATCH V9 07/21] csky: MMU and page table management Guo Ren
2018-10-17 15:06   ` Arnd Bergmann
2018-10-18  2:05     ` Guo Ren
2018-10-16  2:58 ` [PATCH V9 08/21] csky: Process management and Signal Guo Ren
2018-10-17 15:11   ` Arnd Bergmann
2018-10-18  2:37     ` Guo Ren
2018-10-16  2:58 ` [PATCH V9 09/21] csky: VDSO and rt_sigreturn Guo Ren
2018-10-17 15:13   ` Arnd Bergmann
2018-10-16  2:58 ` [PATCH V9 10/21] csky: IRQ handling Guo Ren
2018-10-17 15:14   ` Arnd Bergmann
2018-10-18  2:39     ` Guo Ren
2018-10-16  2:58 ` [PATCH V9 11/21] csky: Atomic operations Guo Ren
2018-10-17 15:17   ` Arnd Bergmann
2018-10-18  2:40     ` Guo Ren
2018-10-21 20:55   ` Peter Zijlstra
2018-10-22  1:52     ` Guo Ren
2018-10-16  2:58 ` [PATCH V9 12/21] csky: ELF and module probe Guo Ren
2018-10-17 15:18   ` Arnd Bergmann
2018-10-18  2:49     ` Guo Ren
2018-10-18  8:31       ` Arnd Bergmann
2018-10-16  2:58 ` [PATCH V9 13/21] csky: Library functions Guo Ren
2018-10-17 15:24   ` Arnd Bergmann
2018-10-18  3:10     ` Guo Ren
2018-10-16  2:58 ` [PATCH V9 14/21] csky: User access Guo Ren
2018-10-17 15:37   ` Arnd Bergmann
2018-10-16  2:58 ` [PATCH V9 15/21] csky: Debug and Ptrace GDB Guo Ren
2018-10-17 15:46   ` Arnd Bergmann
2018-10-18  3:17     ` Guo Ren
2018-10-16  2:58 ` [PATCH V9 16/21] csky: SMP support Guo Ren
2018-10-17 15:47   ` Arnd Bergmann
2018-10-16  2:58 ` [PATCH V9 17/21] csky: Misc headers Guo Ren
2018-10-17 15:49   ` Arnd Bergmann
2018-10-16  2:58 ` Guo Ren [this message]
2018-10-17 15:50   ` [PATCH V9 18/21] dt-bindings: csky CPU Bindings Arnd Bergmann
2018-10-18  3:21     ` Guo Ren
2018-10-18  3:45       ` Guo Ren
2018-10-18 14:31   ` Rob Herring
2018-10-19  2:19     ` Guo Ren
2018-10-16  2:58 ` [PATCH V9 19/21] dt-bindings: Add vendor prefix for csky Guo Ren
2018-10-16  2:58 ` [PATCH V9 20/21] MAINTAINERS: Add csky Guo Ren
2018-10-17 15:51   ` Arnd Bergmann
2018-10-16  5:48 ` [PATCH V9 21/21] csky: support dword access for get_user_size() Guo Ren
2018-10-17 15:44   ` Arnd Bergmann
2018-10-18  3:41     ` Guo Ren
2018-10-18  8:34       ` Arnd Bergmann
2018-10-18  8:57         ` Guo Ren
2018-10-24  7:17           ` Arnd Bergmann
2018-10-25 17:08             ` Guo Ren
2018-10-17 15:58 ` [PATCH V9 00/21] C-SKY(csky) Linux Kernel Port Arnd Bergmann
2018-10-18  4:10   ` Guo Ren
2018-10-18  8:36     ` Arnd Bergmann
2018-10-18  9:03       ` Guo Ren

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