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2d9eb1dd58
Add DT bindings for power domain driver for GPCv2 IP block found in i.MX7 SoCs. Cc: yurovsky@gmail.com Cc: Lucas Stach <l.stach@pengutronix.de> Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Fabio Estevam <fabio.estevam@nxp.com> Cc: Dong Aisheng <dongas86@gmail.com> Cc: devicetree@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
72 lines
1.7 KiB
Plaintext
72 lines
1.7 KiB
Plaintext
Freescale i.MX General Power Controller v2
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==========================================
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The i.MX7S/D General Power Control (GPC) block contains Power Gating
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Control (PGC) for various power domains.
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Required properties:
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- compatible: Should be "fsl,imx7d-gpc"
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- reg: should be register base and length as documented in the
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datasheet
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- interrupts: Should contain GPC interrupt request 1
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Power domains contained within GPC node are generic power domain
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providers, documented in
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Documentation/devicetree/bindings/power/power_domain.txt, which are
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described as subnodes of the power gating controller 'pgc' node,
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which, in turn, is expected to contain the following:
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Required properties:
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- reg: Power domain index. Valid values are defined in
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include/dt-bindings/power/imx7-power.h
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- #power-domain-cells: Should be 0
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Optional properties:
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- power-supply: Power supply used to power the domain
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Example:
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gpc: gpc@303a0000 {
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compatible = "fsl,imx7d-gpc";
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reg = <0x303a0000 0x1000>;
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interrupt-controller;
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interrupts = <GIC_SPI 87 IRQ_TYPE_LEVEL_HIGH>;
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#interrupt-cells = <3>;
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interrupt-parent = <&intc>;
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pgc {
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#address-cells = <1>;
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#size-cells = <0>;
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pgc_pcie_phy: power-domain@3 {
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#power-domain-cells = <0>;
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reg = <IMX7_POWER_DOMAIN_PCIE_PHY>;
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power-supply = <®_1p0d>;
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};
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};
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};
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Specifying power domain for IP modules
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======================================
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IP cores belonging to a power domain should contain a 'power-domains'
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property that is a phandle for PGC node representing the domain.
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Example of a device that is part of the PCIE_PHY power domain:
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pcie: pcie@33800000 {
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reg = <0x33800000 0x4000>,
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<0x4ff00000 0x80000>;
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/* ... */
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power-domains = <&pgc_pcie_phy>;
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/* ... */
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};
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