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From:   Eric Anholt <eric@anholt.net>
To:     Florian Fainelli <f.fainelli@gmail.com>,
        linux-watchdog@vger.kernel.org, devicetree@vger.kernel.org,
        Guenter Roeck <linux@roeck-us.net>,
        Wim Van Sebroeck <wim@linux-watchdog.org>,
        Lee Jones <lee.jones@linaro.org>,
        Stefan Wahren <stefan.wahren@i2se.com>,
        Mark Rutland <mark.rutland@arm.com>,
        Rob Herring <robh+dt@kernel.org>
Cc:     linux-rpi-kernel@lists.infradead.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        bcm-kernel-feedback-list@broadcom.com,
        Eric Anholt <eric@anholt.net>, Rob Herring <robh@kernel.org>
Subject: [PATCH v4 1/5] dt-bindings: soc: Add a new binding for the BCM2835 PM node. (v4)
Date:   Wed, 12 Dec 2018 15:51:46 -0800
Message-Id: <20181212235150.6491-2-eric@anholt.net>
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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)
---

v4: Add the system-power-controller node.

 .../bindings/soc/bcm/brcm,bcm2835-pm.txt      | 46 +++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/soc/bcm/brcm,bcm2835-pm.txt

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;
+};
-- 
2.20.0.rc1