[PATCH v3 2/3] DT: bingdings: power: reset: add linkstation-reset doc
From: Roger Shimizu <hidden>
Date: 2016-12-27 07:06:10
Also in:
linux-devicetree, linux-pm
Subsystem:
open firmware and flattened device tree bindings, system reset/shutdown drivers, the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Sebastian Reichel, Linus Torvalds
Add linkstation-reset doc to describe the newly added POWER_RESET_LINKSTATION driver, which controls magic command sending to UART1 to power-off Buffalo Linkstation / KuroBox and their variants. To: Sebastian Reichel <sre@kernel.org> To: Rob Herring <robh+dt@kernel.org> To: Mark Rutland <mark.rutland@arm.com> Cc: Andrew Lunn <andrew@lunn.ch> Cc: Ryan Tandy <redacted> Cc: linux-pm at vger.kernel.org Cc: devicetree at vger.kernel.org Cc: linux-arm-kernel at lists.infradead.org Signed-off-by: Roger Shimizu <redacted> --- .../bindings/power/reset/linkstation-reset.txt | 26 ++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/reset/linkstation-reset.txt
diff --git a/Documentation/devicetree/bindings/power/reset/linkstation-reset.txt b/Documentation/devicetree/bindings/power/reset/linkstation-reset.txt
new file mode 100644
index 000000000000..815e340318f3
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/reset/linkstation-reset.txt@@ -0,0 +1,26 @@ +* Buffalo Linkstation Reset Driver + +Power of some Buffalo Linkstation or KuroBox Pro is managed by +micro-controller, which connects to UART1. After being fed from UART1 +by a few magic numbers, the so-called power-off command, +the micro-controller will turn power off the device. + +This is very similar to QNAP or Synology NAS devices, which is +described in qnap-poweroff.txt, however the command is much simpler, +only 1-byte long and without checksums. + +This driver adds a handler to pm_power_off which is called to turn the +power off. + +Required Properties: +- compatible: Should be "linkstation,power-off" +- reg: Address and length of the register set for UART1 +- clocks: tclk clock + +Example: + + reset { + compatible = "linkstation,power-off"; + reg = <0x12100 0x100>; + clocks = <&core_clk 0>; + };
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2.11.0