78 lines
2.0 KiB
Plaintext
78 lines
2.0 KiB
Plaintext
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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 one of:
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- "fsl,imx7d-gpc"
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- "fsl,imx8mq-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 for fsl,imx7d-gpc and
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include/dt-bindings/power/imx8m-power.h for fsl,imx8mq-gpc
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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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- clocks: a number of phandles to clocks that need to be enabled during
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domain power-up sequencing to ensure reset propagation into devices
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located inside this power 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@1 {
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#power-domain-cells = <0>;
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reg = <1>;
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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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