1 MediaTek PMIC Wrapper Driver
3 This document describes the binding for the MediaTek PMIC wrapper.
5 On MediaTek SoCs the PMIC is connected via SPI. The SPI master interface
6 is not directly visible to the CPU, but only through the PMIC wrapper
7 inside the SoC. The communication between the SoC and the PMIC can
8 optionally be encrypted. Also a non standard Dual IO SPI mode can be
9 used to increase speed.
13 on MT8135 the pins of some SoC internal peripherals can be on the PMIC.
14 The signals of these pins are routed over the SPI bus using the pwrap
15 bridge. In the binding description below the properties needed for bridging
16 are marked with "IP Pairing". These are optional on SoCs which do not support
19 Required properties in pwrap device node.
21 "mediatek,mt8135-pwrap" for MT8135 SoCs
22 "mediatek,mt8173-pwrap" for MT8173 SoCs
23 - interrupts: IRQ for pwrap in SOC
24 - reg-names: Must include the following entries:
25 "pwrap": Main registers base
26 "pwrap-bridge": bridge base (IP Pairing)
27 - reg: Must contain an entry for each entry in reg-names.
28 - reset-names: Must include the following entries:
30 "pwrap-bridge" (IP Pairing)
31 - resets: Must contain an entry for each entry in reset-names.
32 - clock-names: Must include the following entries:
34 "wrap": Main module clock
35 - clocks: Must contain an entry for each entry in clock-names.
38 - pmic: Mediatek PMIC MFD is the child device of pwrap
39 See the following for child node definitions:
40 Documentation/devicetree/bindings/mfd/mt6397.txt
43 pwrap: pwrap@1000f000 {
44 compatible = "mediatek,mt8135-pwrap";
45 reg = <0 0x1000f000 0 0x1000>,
46 <0 0x11017000 0 0x1000>;
47 reg-names = "pwrap", "pwrap-bridge";
48 interrupts = <GIC_SPI 128 IRQ_TYPE_LEVEL_HIGH>;
49 resets = <&infracfg MT8135_INFRA_PMIC_WRAP_RST>,
50 <&pericfg MT8135_PERI_PWRAP_BRIDGE_SW_RST>;
51 reset-names = "pwrap", "pwrap-bridge";
52 clocks = <&clk26m>, <&clk26m>;
53 clock-names = "spi", "wrap";
56 compatible = "mediatek,mt6397";