76 lines
2.1 KiB
Plaintext
76 lines
2.1 KiB
Plaintext
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This describe DT binding of the pad controller driver for Tegra 186 pmc.
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Required properties:
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- Compatible: Must be nvidia,tegra186-pmc.
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- #padcontroller-cells: Number of padctrl arguments. It must be 1.
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Pad intitialisation through subnode:
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==================================
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Driver offers the pad initialisation through subnode. The subnode
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under "pmc" node contains the subnode name "io-pad-defaults" which contains
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child node of pads and their settings.
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Following are child node name for the "io-pad-defaults" node.
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audio-hv, dmic-hv, ao-hv, sdmmc1-hv, sdmmc2-hv, sdmmc3-hv,
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spi, dbg, ufs.
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Optional properties:
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- nvidia,pad-name: Pad name if child node name is not used for pad name.
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- nvidia,io-pad-init-voltage: Voltage value. Options are
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IO_RAIL_VOLTAGE_1_2V,
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IO_RAIL_VOLTAGE_1_8V,
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IO_RAIL_VOLTAGE_3_3V.
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- nvidia,deep-power-down-enable: Boolean, Deep power down enable.
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- nvidia,deep-power-down-disable: Boolean, deep power down disable.
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- nvidia,io-pad-power-enable: boolean, enable io pad power i.e. deep power
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down disable.
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- nvidia,io-pad-power-disable: boolean, disable io pad power i.e. deep
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power down enable.
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- nvidia,enable-dynamic-pad-voltage: boolean, allow dynamic pad voltage
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configuration. If this property is mising then it only
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only allo the configuration during init and thereafter,
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no dynamic switching.
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Property should be used for better readbility and not conflict with
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other properties.
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pmc {
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::::
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io-pad-defaults {
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audio-hv {
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nvidia,deep-power-down-enable;
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};
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dmic-hv {
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nvidia,io-pad-init-voltage = <IO_RAIL_VOLTAGE_1_8V>;
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};
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:::
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};
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};
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Example: SDMMC1 pad is 6 and SDMMC3 is 7.
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tegra_pmc: pmc@c360000 {
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compatible = "nvidia,tegra186-pmc";
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reg = <0x0 0xc360000 0x0 0x400>;
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#padcontroller-cells = <1>;
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status = "disabled";
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io-pad-defaults {
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gpio {
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nvidia,io-pad-init-voltage = <IO_RAIL_VOLTAGE_1_8V>;
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};
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audio-hv {
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nvidia,io-pad-init-voltage = <IO_RAIL_VOLTAGE_3_3V>;
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};
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};
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};
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sdhci@700b0400 {
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compatible = "nvidia,tegra186-sdhci";
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::::
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pad-controllers = <&tegra_pmc TEGRA186_PAD_SDMMC3>;
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pad-names = "sdmmc";
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::::
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};
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