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>, 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 Subject: [PATCH 2/7] dt-bindings: power: Add apple,pmgr-pwrstate binding Date: Wed, 6 Oct 2021 00:59:18 +0900 [thread overview] Message-ID: <20211005155923.173399-3-marcan@marcan.st> (raw) In-Reply-To: <20211005155923.173399-1-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". Signed-off-by: Hector Martin <marcan@marcan.st> --- .../bindings/power/apple,pmgr-pwrstate.yaml | 117 ++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 118 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..a14bf5f30ff0 --- /dev/null +++ b/Documentation/devicetree/bindings/power/apple,pmgr-pwrstate.yaml @@ -0,0 +1,117 @@ +# 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 a PMGR block 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. + + IP cores belonging to a power domain should contain a + "power-domains" property that is a phandle for the + power domain node representing the domain. + +properties: + $nodename: + pattern: "^power-controller@[0-9a-f]+$" + + compatible: + items: + - enum: + - apple,t8103-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. + + apple,domain-name: + description: | + Specifies the name of the SoC device being controlled. This is used to + name the power/reset domains. + $ref: /schemas/types.yaml#/definitions/string + + apple,always-on: + description: | + Forces this power domain to always be powered up. + type: boolean + +required: + - compatible + - reg + - "#power-domain-cells" + - "#reset-cells" + - "apple,domain-name" + +additionalProperties: false + +examples: + - | + soc { + #address-cells = <2>; + #size-cells = <2>; + + power-management@23b700000 { + compatible = "apple,t8103-pmgr", "apple,pmgr", "syscon", "simple-mfd"; + #address-cells = <1>; + #size-cells = <0>; + reg = <0x2 0x3b700000 0x0 0x14000>; + + ps_sio: power-controller@1c0 { + compatible = "apple,t8103-pmgr-pwrstate", "apple,pmgr-pwrstate"; + reg = <0x1c0>; + #power-domain-cells = <0>; + #reset-cells = <0>; + apple,domain-name = "sio"; + apple,always-on; + }; + + ps_uart_p: power-controller@220 { + compatible = "apple,t8103-pmgr-pwrstate", "apple,pmgr-pwrstate"; + reg = <0x220>; + #power-domain-cells = <0>; + #reset-cells = <0>; + apple,domain-name = "uart_p"; + power-domains = <&ps_sio>; + }; + + ps_uart0: power-controller@270 { + compatible = "apple,t8103-pmgr-pwrstate", "apple,pmgr-pwrstate"; + reg = <0x270>; + #power-domain-cells = <0>; + #reset-cells = <0>; + apple,domain-name = "uart0"; + power-domains = <&ps_uart_p>; + }; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index d25598842d15..5fe53d9a2956 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1722,6 +1722,7 @@ F: Documentation/devicetree/bindings/arm/apple.yaml F: Documentation/devicetree/bindings/arm/apple/* F: Documentation/devicetree/bindings/interrupt-controller/apple,aic.yaml F: Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml +F: Documentation/devicetree/bindings/power/apple* F: arch/arm64/boot/dts/apple/ F: drivers/irqchip/irq-apple-aic.c F: include/dt-bindings/interrupt-controller/apple-aic.h -- 2.33.0
WARNING: multiple messages have this Message-ID (diff)
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>, 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 Subject: [PATCH 2/7] dt-bindings: power: Add apple,pmgr-pwrstate binding Date: Wed, 6 Oct 2021 00:59:18 +0900 [thread overview] Message-ID: <20211005155923.173399-3-marcan@marcan.st> (raw) In-Reply-To: <20211005155923.173399-1-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". Signed-off-by: Hector Martin <marcan@marcan.st> --- .../bindings/power/apple,pmgr-pwrstate.yaml | 117 ++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 118 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..a14bf5f30ff0 --- /dev/null +++ b/Documentation/devicetree/bindings/power/apple,pmgr-pwrstate.yaml @@ -0,0 +1,117 @@ +# 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 a PMGR block 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. + + IP cores belonging to a power domain should contain a + "power-domains" property that is a phandle for the + power domain node representing the domain. + +properties: + $nodename: + pattern: "^power-controller@[0-9a-f]+$" + + compatible: + items: + - enum: + - apple,t8103-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. + + apple,domain-name: + description: | + Specifies the name of the SoC device being controlled. This is used to + name the power/reset domains. + $ref: /schemas/types.yaml#/definitions/string + + apple,always-on: + description: | + Forces this power domain to always be powered up. + type: boolean + +required: + - compatible + - reg + - "#power-domain-cells" + - "#reset-cells" + - "apple,domain-name" + +additionalProperties: false + +examples: + - | + soc { + #address-cells = <2>; + #size-cells = <2>; + + power-management@23b700000 { + compatible = "apple,t8103-pmgr", "apple,pmgr", "syscon", "simple-mfd"; + #address-cells = <1>; + #size-cells = <0>; + reg = <0x2 0x3b700000 0x0 0x14000>; + + ps_sio: power-controller@1c0 { + compatible = "apple,t8103-pmgr-pwrstate", "apple,pmgr-pwrstate"; + reg = <0x1c0>; + #power-domain-cells = <0>; + #reset-cells = <0>; + apple,domain-name = "sio"; + apple,always-on; + }; + + ps_uart_p: power-controller@220 { + compatible = "apple,t8103-pmgr-pwrstate", "apple,pmgr-pwrstate"; + reg = <0x220>; + #power-domain-cells = <0>; + #reset-cells = <0>; + apple,domain-name = "uart_p"; + power-domains = <&ps_sio>; + }; + + ps_uart0: power-controller@270 { + compatible = "apple,t8103-pmgr-pwrstate", "apple,pmgr-pwrstate"; + reg = <0x270>; + #power-domain-cells = <0>; + #reset-cells = <0>; + apple,domain-name = "uart0"; + power-domains = <&ps_uart_p>; + }; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index d25598842d15..5fe53d9a2956 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1722,6 +1722,7 @@ F: Documentation/devicetree/bindings/arm/apple.yaml F: Documentation/devicetree/bindings/arm/apple/* F: Documentation/devicetree/bindings/interrupt-controller/apple,aic.yaml F: Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml +F: Documentation/devicetree/bindings/power/apple* F: arch/arm64/boot/dts/apple/ F: drivers/irqchip/irq-apple-aic.c F: include/dt-bindings/interrupt-controller/apple-aic.h -- 2.33.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-10-05 16:00 UTC|newest] Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-10-05 15:59 [PATCH 0/7] Apple SoC PMGR device power states driver Hector Martin 2021-10-05 15:59 ` Hector Martin 2021-10-05 15:59 ` [PATCH 1/7] dt-bindings: arm: apple: Add apple,pmgr binding Hector Martin 2021-10-05 15:59 ` Hector Martin 2021-10-05 20:09 ` Mark Kettenis 2021-10-05 20:09 ` Mark Kettenis 2021-10-05 22:45 ` Rob Herring 2021-10-05 22:45 ` Rob Herring 2021-10-06 15:17 ` Hector Martin 2021-10-06 15:17 ` Hector Martin 2021-10-06 6:56 ` Krzysztof Kozlowski 2021-10-06 6:56 ` Krzysztof Kozlowski 2021-10-06 7:30 ` Krzysztof Kozlowski 2021-10-06 7:30 ` Krzysztof Kozlowski 2021-10-06 15:21 ` Hector Martin 2021-10-06 15:21 ` Hector Martin 2021-10-06 15:26 ` Hector Martin 2021-10-06 15:26 ` Hector Martin 2021-10-07 13:10 ` Krzysztof Kozlowski 2021-10-07 13:10 ` Krzysztof Kozlowski 2021-10-05 15:59 ` Hector Martin [this message] 2021-10-05 15:59 ` [PATCH 2/7] dt-bindings: power: Add apple,pmgr-pwrstate binding Hector Martin 2021-10-05 20:16 ` Mark Kettenis 2021-10-05 20:16 ` Mark Kettenis 2021-10-06 15:27 ` Hector Martin 2021-10-06 15:27 ` Hector Martin 2021-10-06 0:58 ` Rob Herring 2021-10-06 0:58 ` Rob Herring 2021-10-06 15:52 ` Hector Martin 2021-10-06 15:52 ` Hector Martin 2021-10-06 15:55 ` Hector Martin 2021-10-06 15:55 ` Hector Martin 2021-10-08 7:50 ` Krzysztof Kozlowski 2021-10-08 7:50 ` Krzysztof Kozlowski 2021-10-11 5:17 ` Hector Martin 2021-10-11 5:17 ` Hector Martin 2021-10-06 7:05 ` Krzysztof Kozlowski 2021-10-06 7:05 ` Krzysztof Kozlowski 2021-10-06 15:59 ` Hector Martin 2021-10-06 15:59 ` Hector Martin 2021-10-07 13:12 ` Krzysztof Kozlowski 2021-10-07 13:12 ` Krzysztof Kozlowski 2021-10-11 4:42 ` Hector Martin 2021-10-11 4:42 ` Hector Martin 2021-10-05 15:59 ` [PATCH 3/7] soc: apple: Add driver for Apple PMGR power state controls Hector Martin 2021-10-05 15:59 ` Hector Martin 2021-10-05 16:08 ` Linus Walleij 2021-10-05 16:08 ` Linus Walleij 2021-10-05 16:15 ` Hector Martin 2021-10-05 16:15 ` Hector Martin 2021-10-05 19:49 ` Linus Walleij 2021-10-05 19:49 ` Linus Walleij 2021-10-05 20:21 ` Mark Kettenis 2021-10-05 20:21 ` Mark Kettenis 2021-10-06 16:00 ` Hector Martin 2021-10-06 16:00 ` Hector Martin 2021-10-06 7:28 ` Krzysztof Kozlowski 2021-10-06 7:28 ` Krzysztof Kozlowski 2021-10-06 16:08 ` Hector Martin 2021-10-06 16:08 ` Hector Martin 2021-10-06 9:24 ` Philipp Zabel 2021-10-06 9:24 ` Philipp Zabel 2021-10-06 16:11 ` Hector Martin 2021-10-06 16:11 ` Hector Martin 2021-10-05 15:59 ` [PATCH 4/7] arm64: dts: apple: t8103: Rename clk24 to clkref Hector Martin 2021-10-05 15:59 ` Hector Martin 2021-10-05 20:22 ` Mark Kettenis 2021-10-05 20:22 ` Mark Kettenis 2021-10-05 15:59 ` [PATCH 5/7] arm64: dts: apple: t8103: Add the UART PMGR tree Hector Martin 2021-10-05 15:59 ` Hector Martin 2021-10-05 20:25 ` Mark Kettenis 2021-10-05 20:25 ` Mark Kettenis 2021-10-05 15:59 ` [PATCH 6/7] tty: serial: samsung_tty: Support runtime PM Hector Martin 2021-10-05 15:59 ` Hector Martin 2021-10-06 7:43 ` Krzysztof Kozlowski 2021-10-06 7:43 ` Krzysztof Kozlowski 2021-10-06 13:25 ` Rafael J. Wysocki 2021-10-06 13:25 ` Rafael J. Wysocki 2021-10-06 13:29 ` Krzysztof Kozlowski 2021-10-06 13:29 ` Krzysztof Kozlowski 2021-10-11 5:32 ` Hector Martin 2021-10-11 5:32 ` Hector Martin 2021-10-11 6:48 ` Krzysztof Kozlowski 2021-10-11 6:48 ` Krzysztof Kozlowski 2021-10-11 8:27 ` Johan Hovold 2021-10-11 8:27 ` Johan Hovold 2021-10-05 15:59 ` [PATCH 7/7] arm64: dts: apple: t8103: Add UART2 Hector Martin 2021-10-05 15:59 ` Hector Martin 2021-10-05 20:26 ` Mark Kettenis 2021-10-05 20:26 ` Mark Kettenis
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