mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-27 05:05:29 +07:00
ae1d2add26
Some power domains handled by the GPCv2 driver need to enable the clocks for devies inside the domain, so that the reset propagation and proper power-up sequencing happens. Handle them in the same way as on GPCv1. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
78 lines
2.0 KiB
Plaintext
78 lines
2.0 KiB
Plaintext
Freescale i.MX General Power Controller v2
|
|
==========================================
|
|
|
|
The i.MX7S/D General Power Control (GPC) block contains Power Gating
|
|
Control (PGC) for various power domains.
|
|
|
|
Required properties:
|
|
|
|
- compatible: Should be one of:
|
|
- "fsl,imx7d-gpc"
|
|
- "fsl,imx8mq-gpc"
|
|
|
|
- reg: should be register base and length as documented in the
|
|
datasheet
|
|
|
|
- interrupts: Should contain GPC interrupt request 1
|
|
|
|
Power domains contained within GPC node are generic power domain
|
|
providers, documented in
|
|
Documentation/devicetree/bindings/power/power_domain.txt, which are
|
|
described as subnodes of the power gating controller 'pgc' node,
|
|
which, in turn, is expected to contain the following:
|
|
|
|
Required properties:
|
|
|
|
- reg: Power domain index. Valid values are defined in
|
|
include/dt-bindings/power/imx7-power.h for fsl,imx7d-gpc and
|
|
include/dt-bindings/power/imx8m-power.h for fsl,imx8mq-gpc
|
|
|
|
- #power-domain-cells: Should be 0
|
|
|
|
Optional properties:
|
|
|
|
- power-supply: Power supply used to power the domain
|
|
- clocks: a number of phandles to clocks that need to be enabled during
|
|
domain power-up sequencing to ensure reset propagation into devices
|
|
located inside this power domain
|
|
|
|
Example:
|
|
|
|
gpc: gpc@303a0000 {
|
|
compatible = "fsl,imx7d-gpc";
|
|
reg = <0x303a0000 0x1000>;
|
|
interrupt-controller;
|
|
interrupts = <GIC_SPI 87 IRQ_TYPE_LEVEL_HIGH>;
|
|
#interrupt-cells = <3>;
|
|
interrupt-parent = <&intc>;
|
|
|
|
pgc {
|
|
#address-cells = <1>;
|
|
#size-cells = <0>;
|
|
|
|
pgc_pcie_phy: power-domain@1 {
|
|
#power-domain-cells = <0>;
|
|
|
|
reg = <1>;
|
|
power-supply = <®_1p0d>;
|
|
};
|
|
};
|
|
};
|
|
|
|
|
|
Specifying power domain for IP modules
|
|
======================================
|
|
|
|
IP cores belonging to a power domain should contain a 'power-domains'
|
|
property that is a phandle for PGC node representing the domain.
|
|
|
|
Example of a device that is part of the PCIE_PHY power domain:
|
|
|
|
pcie: pcie@33800000 {
|
|
reg = <0x33800000 0x4000>,
|
|
<0x4ff00000 0x80000>;
|
|
/* ... */
|
|
power-domains = <&pgc_pcie_phy>;
|
|
/* ... */
|
|
};
|