From: Hector Martin <marcan@marcan.st>
To: linux-arm-kernel@lists.infradead.org
Cc: Hector Martin <marcan@marcan.st>, Marc Zyngier <maz@kernel.org>,
Rob Herring <robh+dt@kernel.org>, Arnd Bergmann <arnd@kernel.org>,
Linus Walleij <linus.walleij@linaro.org>,
Alyssa Rosenzweig <alyssa@rosenzweig.io>,
Krzysztof Kozlowski <krzk@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Mark Kettenis <mark.kettenis@xs4all.nl>,
Philipp Zabel <p.zabel@pengutronix.de>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Johan Hovold <johan@kernel.org>,
devicetree@vger.kernel.org, linux-pm@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-samsung-soc@vger.kernel.org,
linux-serial@vger.kernel.org,
Mark Kettenis <kettenis@openbsd.org>,
Rob Herring <robh@kernel.org>
Subject: [PATCH v3 06/11] dt-bindings: power: Add apple,pmgr-pwrstate binding
Date: Wed, 24 Nov 2021 16:34:16 +0900 [thread overview]
Message-ID: <20211124073419.181799-7-marcan@marcan.st> (raw)
In-Reply-To: <20211124073419.181799-1-marcan@marcan.st>
This syscon child node represents a single SoC device controlled by the
PMGR block. This layout allows us to declare all device power state
controls (power/clock gating and reset) in the device tree, including
dependencies, instead of hardcoding it into the driver. The register
layout is uniform.
Each pmgr-pwrstate node provides genpd and reset features, to be
consumed by downstream device nodes.
Future SoCs are expected to use backwards compatible registers, and the
"apple,pmgr-pwrstate" represents any such interfaces (possibly with
additional features gated by the more specific compatible), allowing
them to be bound without driver updates. If a backwards incompatible
change is introduced in future SoCs, it will require a new compatible,
such as "apple,pmgr-pwrstate-v2".
Reviewed-by: Mark Kettenis <kettenis@openbsd.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Hector Martin <marcan@marcan.st>
---
.../bindings/power/apple,pmgr-pwrstate.yaml | 71 +++++++++++++++++++
1 file changed, 71 insertions(+)
create mode 100644 Documentation/devicetree/bindings/power/apple,pmgr-pwrstate.yaml
diff --git a/Documentation/devicetree/bindings/power/apple,pmgr-pwrstate.yaml b/Documentation/devicetree/bindings/power/apple,pmgr-pwrstate.yaml
new file mode 100644
index 000000000000..5056d08b8261
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/apple,pmgr-pwrstate.yaml
@@ -0,0 +1,71 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/power/apple,pmgr-pwrstate.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Apple SoC PMGR Power States
+
+maintainers:
+ - Hector Martin <marcan@marcan.st>
+
+allOf:
+ - $ref: "power-domain.yaml#"
+
+description: |
+ Apple SoCs include PMGR blocks responsible for power management,
+ which can control various clocks, resets, power states, and
+ performance features. This binding describes the device power
+ state registers, which control power states and resets.
+
+ Each instance of a power controller within the PMGR syscon node
+ represents a generic power domain provider, as documented in
+ Documentation/devicetree/bindings/power/power-domain.yaml.
+ The provider controls a single SoC block. The power hierarchy is
+ represented via power-domains relationships between these nodes.
+
+ See Documentation/devicetree/bindings/arm/apple/apple,pmgr.yaml
+ for the top-level PMGR node documentation.
+
+properties:
+ compatible:
+ items:
+ - enum:
+ - apple,t8103-pmgr-pwrstate
+ - apple,t6000-pmgr-pwrstate
+ - const: apple,pmgr-pwrstate
+
+ reg:
+ maxItems: 1
+
+ "#power-domain-cells":
+ const: 0
+
+ "#reset-cells":
+ const: 0
+
+ power-domains:
+ description:
+ Reference to parent power domains. A domain may have multiple parents,
+ and all will be powered up when it is powered.
+ minItems: 1
+ maxItems: 8 # Arbitrary, should be enough
+
+ label:
+ description:
+ Specifies the name of the SoC domain being controlled. This is used to
+ name the power/reset domains.
+
+ apple,always-on:
+ description:
+ Forces this power domain to always be powered up.
+ type: boolean
+
+required:
+ - compatible
+ - reg
+ - "#power-domain-cells"
+ - "#reset-cells"
+ - label
+
+additionalProperties: false
--
2.33.0
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next prev parent reply other threads:[~2021-11-24 7:37 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-24 7:34 [PATCH v3 00/11] Apple SoC PMGR device power states driver Hector Martin
2021-11-24 7:34 ` [PATCH v3 01/11] MAINTAINERS: Add PMGR power state files to ARM/APPLE MACHINE Hector Martin
2021-11-24 7:34 ` [PATCH v3 02/11] dt-bindings: i2c: apple, i2c: Add power-domains property Hector Martin
2021-11-29 0:54 ` [PATCH v3 02/11] dt-bindings: i2c: apple,i2c: " Rob Herring
2021-11-24 7:34 ` [PATCH v3 03/11] dt-bindings: iommu: apple, dart: " Hector Martin
2021-11-29 0:54 ` [PATCH v3 03/11] dt-bindings: iommu: apple,dart: " Rob Herring
2021-11-24 7:34 ` [PATCH v3 04/11] dt-bindings: pinctrl: apple, pinctrl: " Hector Martin
2021-11-29 0:58 ` [PATCH v3 04/11] dt-bindings: pinctrl: apple,pinctrl: " Rob Herring
2021-11-24 7:34 ` [PATCH v3 05/11] dt-bindings: interrupt-controller: apple, aic: " Hector Martin
2021-11-29 0:58 ` [PATCH v3 05/11] dt-bindings: interrupt-controller: apple,aic: " Rob Herring
2021-11-24 7:34 ` Hector Martin [this message]
2021-11-24 7:34 ` [PATCH v3 07/11] dt-bindings: arm: apple: Add apple,pmgr binding Hector Martin
2021-11-28 16:24 ` Rob Herring
2021-11-24 7:34 ` [PATCH v3 08/11] soc: apple: Add driver for Apple PMGR power state controls Hector Martin
2021-11-24 7:34 ` [PATCH v3 09/11] arm64: dts: apple: t8103: Add PMGR nodes Hector Martin
2021-12-02 17:59 ` Sven Peter
2021-11-24 7:46 ` [PATCH v3 10/11] tty: serial: samsung_tty: Support runtime PM Hector Martin
2021-12-07 9:18 ` Krzysztof Kozlowski
2021-12-09 10:48 ` Andy Shevchenko
2021-11-24 7:46 ` [PATCH v3 11/11] arm64: dts: apple: t8103: Add UART2 Hector Martin
2021-12-07 5:30 ` [PATCH v3 00/11] Apple SoC PMGR device power states driver Hector Martin
2021-12-07 7:53 ` Krzysztof Kozlowski
2021-12-07 8:06 ` Greg Kroah-Hartman
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