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dt-bindings: soc: Add a new binding for the BCM2835 PM node. (v4)
This binding supersedes the bcm2835-pm-wdt binding which only covered
enough to provide a watchdog, but the HW block is actually mostly
about power domains.
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Rob Herring <robh@kernel.org> (v3)
Acked-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
authored by
Eric Anholt
and committed by
Stefan Wahren
fbeab182
b80ec7c0
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Documentation/devicetree/bindings/soc/bcm/brcm,bcm2835-pm.txt
+46
Documentation/devicetree/bindings/soc/bcm/brcm,bcm2835-pm.txt
···
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BCM2835 PM (Power domains, watchdog)
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The PM block controls power domains and some reset lines, and includes
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a watchdog timer. This binding supersedes the brcm,bcm2835-pm-wdt
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binding which covered some of PM's register range and functionality.
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Required properties:
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- compatible: Should be "brcm,bcm2835-pm"
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- reg: Specifies base physical address and size of the two
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register ranges ("PM" and "ASYNC_BRIDGE" in that
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order)
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- clocks: a) v3d: The V3D clock from CPRMAN
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b) peri_image: The PERI_IMAGE clock from CPRMAN
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c) h264: The H264 clock from CPRMAN
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d) isp: The ISP clock from CPRMAN
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- #reset-cells: Should be 1. This property follows the reset controller
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bindings[1].
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- #power-domain-cells: Should be 1. This property follows the power domain
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bindings[2].
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Optional properties:
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- timeout-sec: Contains the watchdog timeout in seconds
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- system-power-controller: Whether the watchdog is controlling the
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system power. This node follows the power controller bindings[3].
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[1] Documentation/devicetree/bindings/reset/reset.txt
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[2] Documentation/devicetree/bindings/power/power_domain.txt
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[3] Documentation/devicetree/bindings/power/power-controller.txt
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Example:
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pm {
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compatible = "brcm,bcm2835-pm", "brcm,bcm2835-pm-wdt";
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#power-domain-cells = <1>;
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#reset-cells = <1>;
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reg = <0x7e100000 0x114>,
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<0x7e00a000 0x24>;
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clocks = <&clocks BCM2835_CLOCK_V3D>,
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<&clocks BCM2835_CLOCK_PERI_IMAGE>,
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<&clocks BCM2835_CLOCK_H264>,
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<&clocks BCM2835_CLOCK_ISP>;
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clock-names = "v3d", "peri_image", "h264", "isp";
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system-power-controller;
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};