diff options
author | Eric Anholt <eric@anholt.net> | 2018-12-12 15:51:46 -0800 |
---|---|---|
committer | Stefan Wahren <stefan.wahren@i2se.com> | 2019-01-09 16:55:01 +0100 |
commit | fbeab182b1ae41c3e2e9c05808c01e8f65883e61 (patch) | |
tree | 2f59e34bb90a3e84cc5e9d0598d6dcfdf00a78e0 | |
parent | b80ec7c0ef8de5d04b893310ecae29219143a454 (diff) | |
download | linux-fbeab182b1ae41c3e2e9c05808c01e8f65883e61.tar.bz2 |
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>
-rw-r--r-- | Documentation/devicetree/bindings/soc/bcm/brcm,bcm2835-pm.txt | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/soc/bcm/brcm,bcm2835-pm.txt b/Documentation/devicetree/bindings/soc/bcm/brcm,bcm2835-pm.txt new file mode 100644 index 000000000000..3b7d32956391 --- /dev/null +++ b/Documentation/devicetree/bindings/soc/bcm/brcm,bcm2835-pm.txt @@ -0,0 +1,46 @@ +BCM2835 PM (Power domains, watchdog) + +The PM block controls power domains and some reset lines, and includes +a watchdog timer. This binding supersedes the brcm,bcm2835-pm-wdt +binding which covered some of PM's register range and functionality. + +Required properties: + +- compatible: Should be "brcm,bcm2835-pm" +- reg: Specifies base physical address and size of the two + register ranges ("PM" and "ASYNC_BRIDGE" in that + order) +- clocks: a) v3d: The V3D clock from CPRMAN + b) peri_image: The PERI_IMAGE clock from CPRMAN + c) h264: The H264 clock from CPRMAN + d) isp: The ISP clock from CPRMAN +- #reset-cells: Should be 1. This property follows the reset controller + bindings[1]. +- #power-domain-cells: Should be 1. This property follows the power domain + bindings[2]. + +Optional properties: + +- timeout-sec: Contains the watchdog timeout in seconds +- system-power-controller: Whether the watchdog is controlling the + system power. This node follows the power controller bindings[3]. + +[1] Documentation/devicetree/bindings/reset/reset.txt +[2] Documentation/devicetree/bindings/power/power_domain.txt +[3] Documentation/devicetree/bindings/power/power-controller.txt + +Example: + +pm { + compatible = "brcm,bcm2835-pm", "brcm,bcm2835-pm-wdt"; + #power-domain-cells = <1>; + #reset-cells = <1>; + reg = <0x7e100000 0x114>, + <0x7e00a000 0x24>; + clocks = <&clocks BCM2835_CLOCK_V3D>, + <&clocks BCM2835_CLOCK_PERI_IMAGE>, + <&clocks BCM2835_CLOCK_H264>, + <&clocks BCM2835_CLOCK_ISP>; + clock-names = "v3d", "peri_image", "h264", "isp"; + system-power-controller; +}; |