68 lines
2.5 KiB
Plaintext
68 lines
2.5 KiB
Plaintext
MediaTek PMIC Wrapper Driver
|
|
|
|
This document describes the binding for the MediaTek PMIC wrapper.
|
|
|
|
On MediaTek SoCs the PMIC is connected via SPI. The SPI master interface
|
|
is not directly visible to the CPU, but only through the PMIC wrapper
|
|
inside the SoC. The communication between the SoC and the PMIC can
|
|
optionally be encrypted. Also a non standard Dual IO SPI mode can be
|
|
used to increase speed.
|
|
|
|
IP Pairing
|
|
|
|
on MT8135 the pins of some SoC internal peripherals can be on the PMIC.
|
|
The signals of these pins are routed over the SPI bus using the pwrap
|
|
bridge. In the binding description below the properties needed for bridging
|
|
are marked with "IP Pairing". These are optional on SoCs which do not support
|
|
IP Pairing
|
|
|
|
Required properties in pwrap device node.
|
|
- compatible:
|
|
"mediatek,mt2701-pwrap" for MT2701/7623 SoCs
|
|
"mediatek,mt6761-pwrap" for MT6761 SoCs
|
|
"mediatek,mt6779-pwrap" for MT6779 SoCs
|
|
"mediatek,mt6797-pwrap" for MT6797 SoCs
|
|
"mediatek,mt7622-pwrap" for MT7622 SoCs
|
|
"mediatek,mt8135-pwrap" for MT8135 SoCs
|
|
"mediatek,mt8173-pwrap" for MT8173 SoCs
|
|
- interrupts: IRQ for pwrap in SOC
|
|
- reg-names: Must include the following entries:
|
|
"pwrap": Main registers base
|
|
"pwrap-bridge": bridge base (IP Pairing)
|
|
- reg: Must contain an entry for each entry in reg-names.
|
|
- reset-names: Must include the following entries:
|
|
"pwrap-bridge" (IP Pairing)
|
|
- resets: Must contain an entry for each entry in reset-names.
|
|
- clock-names: Must include the following entries:
|
|
"spi": SPI bus clock
|
|
"wrap": Main module clock
|
|
- clocks: Must contain an entry for each entry in clock-names.
|
|
|
|
Optional properities:
|
|
- pmic: Using either MediaTek PMIC MFD as the child device of pwrap
|
|
See the following for child node definitions:
|
|
Documentation/devicetree/bindings/mfd/mt6397.txt
|
|
or the regulator-only device as the child device of pwrap, such as MT6380.
|
|
See the following definitions for such kinds of devices.
|
|
Documentation/devicetree/bindings/regulator/mt6380-regulator.txt
|
|
- reset-names:
|
|
"pwrap": For MT6779 is optional, for other chip is mandatory.
|
|
|
|
Example:
|
|
pwrap: pwrap@1000f000 {
|
|
compatible = "mediatek,mt8135-pwrap";
|
|
reg = <0 0x1000f000 0 0x1000>,
|
|
<0 0x11017000 0 0x1000>;
|
|
reg-names = "pwrap", "pwrap-bridge";
|
|
interrupts = <GIC_SPI 128 IRQ_TYPE_LEVEL_HIGH>;
|
|
resets = <&infracfg MT8135_INFRA_PMIC_WRAP_RST>,
|
|
<&pericfg MT8135_PERI_PWRAP_BRIDGE_SW_RST>;
|
|
reset-names = "pwrap", "pwrap-bridge";
|
|
clocks = <&clk26m>, <&clk26m>;
|
|
clock-names = "spi", "wrap";
|
|
|
|
pmic {
|
|
compatible = "mediatek,mt6397";
|
|
};
|
|
};
|