From: Christoph Hellwig <hch@lst.de>
To: Sebastian Reichel <sre@kernel.org>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>
Cc: devicetree@vger.kernel.org, linux-riscv@lists.infradead.org,
linux-pm@vger.kernel.org
Subject: [PATCH 1/2] dt-bindings: power: reset: document the QEMU RISC-V virt machine poweroff device
Date: Thu, 7 Nov 2019 22:24:07 +0100 [thread overview]
Message-ID: <20191107212408.11857-2-hch@lst.de> (raw)
In-Reply-To: <20191107212408.11857-1-hch@lst.de>
Add the binding for the trivial Qemu RISC-V poweroff mechanism, which is
just a single MMIO register exposed through the DT.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
.../power/reset/qemu-riscv-virt-poweroff.txt | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
create mode 100644 Documentation/devicetree/bindings/power/reset/qemu-riscv-virt-poweroff.txt
diff --git a/Documentation/devicetree/bindings/power/reset/qemu-riscv-virt-poweroff.txt b/Documentation/devicetree/bindings/power/reset/qemu-riscv-virt-poweroff.txt
new file mode 100644
index 000000000000..80ff6fd4e3b7
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/reset/qemu-riscv-virt-poweroff.txt
@@ -0,0 +1,16 @@
+QEMU RISC-V virt machine poweroff device
+
+This is a device in Qemu that can signal successful or error exit
+by writing two magic numbers to a trivial mmio register.
+A Linux poweroff is implemented as successful exit.
+
+Required Properties:
+-compatible: "sifive,test0"
+-reg: Specifies the physical address of the register
+
+Example:
+
+ test@100000 {
+ compatible = "sifive,test0";
+ reg = <0x100000 0x1000>;
+ };
--
2.20.1
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next prev parent reply other threads:[~2019-11-07 21:24 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-07 21:24 QEMU RISC-V virt machine poweroff driver Christoph Hellwig
2019-11-07 21:24 ` Christoph Hellwig [this message]
2019-11-07 21:52 ` [PATCH 1/2] dt-bindings: power: reset: document the QEMU RISC-V virt machine poweroff device Palmer Dabbelt
2019-11-07 22:32 ` Paul Walmsley
2019-11-14 1:44 ` Rob Herring
2019-11-07 21:24 ` [PATCH 2/2] power: reset: add a QEMU RISC-V virt machine poweroff driver Christoph Hellwig
2019-11-07 21:53 ` Palmer Dabbelt
2019-11-07 22:33 ` Paul Walmsley
2019-11-07 21:56 ` Palmer Dabbelt
2019-11-11 11:36 ` Anup Patel
2019-11-11 16:12 ` Christoph Hellwig
2019-11-11 17:20 ` Paul Walmsley
2019-11-12 4:16 ` Anup Patel
2019-11-14 1:50 ` Rob Herring
2019-11-15 22:14 ` Nick Kossifidis
2019-11-18 6:12 ` Anup Patel
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