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: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
devicetree@vger.kernel.org, green.hu@gmail.com,
Guo Ren <ren_guo@c-sky.com>
Subject: [PATCH V6 18/33] dt-bindings: csky CPU Bindings
Date: Fri, 28 Sep 2018 08:51:15 +0800 [thread overview]
Message-ID: <62098e7d0a7fbdd09f44d7e23333dad258a01bd2.1538058840.git.ren_guo@c-sky.com> (raw)
In-Reply-To: <cover.1538058840.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:[~2018-09-28 0:52 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-27 14:47 [PATCH V6 00/33] C-SKY(csky) Linux Kernel Port Guo Ren
2018-09-27 14:47 ` [PATCH V6 01/33] csky: Build infrastructure Guo Ren
2018-09-28 16:11 ` Christoph Hellwig
2018-09-29 17:20 ` Guo Ren
2018-09-27 14:47 ` [PATCH V6 02/33] csky: defconfig Guo Ren
2018-09-27 14:47 ` [PATCH V6 03/33] csky: Kernel booting Guo Ren
2018-09-28 16:13 ` Christoph Hellwig
2018-09-29 17:09 ` Guo Ren
2018-09-27 14:47 ` [PATCH V6 04/33] csky: Exception handling and mm-fault Guo Ren
2018-09-28 16:15 ` Christoph Hellwig
2018-09-29 17:07 ` Guo Ren
2018-09-27 14:47 ` [PATCH V6 05/33] csky: System Call Guo Ren
2018-09-28 16:16 ` Christoph Hellwig
2018-09-29 17:05 ` Guo Ren
2018-09-27 14:47 ` [PATCH V6 06/33] csky: Cache and TLB routines Guo Ren
2018-09-27 14:47 ` [PATCH V6 07/33] csky: MMU and page table management Guo Ren
2018-09-27 15:47 ` Christoph Hellwig
2018-09-28 13:08 ` Guo Ren
2018-09-29 17:04 ` Guo Ren
2018-09-27 14:47 ` [PATCH V6 08/33] csky: Process management and Signal Guo Ren
2018-09-27 19:50 ` Eric W. Biederman
2018-09-28 13:10 ` Guo Ren
2018-09-29 17:01 ` Guo Ren
2018-09-27 14:47 ` [PATCH V6 09/33] csky: VDSO and rt_sigreturn Guo Ren
2018-09-27 14:47 ` [PATCH V6 10/33] csky: IRQ handling Guo Ren
2018-09-27 15:49 ` Christoph Hellwig
2018-09-28 13:09 ` Guo Ren
2018-09-29 17:00 ` Guo Ren
2018-09-27 14:47 ` [PATCH V6 11/33] csky: Atomic operations Guo Ren
2018-09-27 14:47 ` [PATCH V6 12/33] csky: ELF and module probe Guo Ren
2018-09-27 14:47 ` [PATCH V6 13/33] csky: Library functions Guo Ren
2018-09-28 16:20 ` Christoph Hellwig
2018-09-29 17:00 ` Guo Ren
2018-09-27 14:47 ` [PATCH V6 14/33] csky: User access Guo Ren
2018-09-27 14:47 ` [PATCH V6 15/33] csky: Debug and Ptrace GDB Guo Ren
2018-09-27 14:47 ` [PATCH V6 16/33] csky: SMP support Guo Ren
2018-09-27 14:47 ` [PATCH V6 17/33] csky: Misc headers Guo Ren
2018-09-28 0:51 ` Guo Ren [this message]
2018-09-28 0:51 ` [PATCH V6 19/33] dt-bindings: Add vendor prefix for csky Guo Ren
2018-09-28 0:51 ` [PATCH V6 20/33] csky/dma: fix up dma_mapping error Guo Ren
2018-09-28 16:21 ` Christoph Hellwig
2018-09-29 15:08 ` Guo Ren
2018-09-30 11:10 ` Guo Ren
2018-09-28 0:51 ` [PATCH V6 21/33] csky: remove irq_mapping from smp.c Guo Ren
2018-09-28 0:51 ` [PATCH V6 22/33] irqchip: add C-SKY SMP interrupt controller Guo Ren
2018-09-28 0:51 ` [PATCH V6 23/33] dt-bindings: interrupt-controller: C-SKY SMP intc Guo Ren
2018-09-28 0:51 ` [PATCH V6 24/33] clocksource: add C-SKY SMP timer Guo Ren
2018-09-28 0:51 ` [PATCH V6 25/33] dt-bindings: timer: C-SKY Multi-processor timer Guo Ren
2018-09-28 0:51 ` [PATCH V6 26/33] MAINTAINERS: Add csky Guo Ren
2018-09-28 0:51 ` [PATCH V6 27/33] dt-bindings: interrupt-controller: C-SKY APB intc Guo Ren
2018-09-28 0:51 ` [PATCH V6 28/33] irqchip: add C-SKY APB bus interrupt controller Guo Ren
2018-09-28 0:51 ` [PATCH V6 29/33] dt-bindings: timer: gx6605s SOC timer Guo Ren
2018-09-28 0:51 ` [PATCH V6 30/33] clocksource: add gx6605s SOC system timer Guo Ren
2018-09-28 0:51 ` [PATCH V6 31/33] csky: fix compile error in linux/bug.h with SMP enabled Guo Ren
2018-09-28 0:51 ` [PATCH V6 32/33] csky: fix flush_cache_range and tlb_start_vma Guo Ren
2018-09-28 0:51 ` [PATCH V6 33/33] csky: use asm-generic/bitops/atomic.h for all Guo Ren
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