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1Palmas Pincontrol bindings2 3The pins of Palmas device can be set on different option and provides4the configuration for Pull UP/DOWN, open drain etc.5 6Required properties:7- compatible: It must be one of following:8 - "ti,palmas-pinctrl" for Palma series of the pincontrol.9 - "ti,tps65913-pinctrl" for Palma series device TPS65913.10 - "ti,tps80036-pinctrl" for Palma series device TPS80036.11 12Please refer to pinctrl-bindings.txt in this directory for details of the13common pinctrl bindings used by client devices, including the meaning of the14phrase "pin configuration node".15 16Palmas's pin configuration nodes act as a container for an arbitrary number of17subnodes. Each of these subnodes represents some desired configuration for a18list of pins. This configuration can include the mux function to select on19those pin(s), and various pin configuration parameters, such as pull-up,20open drain.21 22The name of each subnode is not important; all subnodes should be enumerated23and processed purely based on their content.24 25Each subnode only affects those parameters that are explicitly listed. In26other words, a subnode that lists a mux function but no pin configuration27parameters implies no information about any pin configuration parameters.28Similarly, a pin subnode that describes a pullup parameter implies no29information about e.g. the mux function.30 31Optional properties:32- ti,palmas-enable-dvfs1: Enable DVFS1. Configure pins for DVFS1 mode.33 Selection primary or secondary function associated to I2C2_SCL_SCE,34 I2C2_SDA_SDO pin/pad for DVFS1 interface35- ti,palmas-enable-dvfs2: Enable DVFS2. Configure pins for DVFS2 mode.36 Selection primary or secondary function associated to GPADC_START37 and SYSEN2 pin/pad for DVFS2 interface38- ti,palmas-override-powerhold: This is applicable for PMICs for which39 GPIO7 is configured in POWERHOLD mode which has higher priority40 over DEV_ON bit and keeps the PMIC supplies on even after the DEV_ON41 bit is turned off. This property enables driver to over ride the42 POWERHOLD value to GPIO7 so as to turn off the PMIC in power off43 scenarios. So for GPIO7 if ti,palmas-override-powerhold is set44 then the GPIO_7 field should never be muxed to anything else.45 It should be set to POWERHOLD by default and only in case of46 power off scenarios the driver will over ride the mux value.47 48This binding uses the following generic properties as defined in49pinctrl-bindings.txt:50 51Required: pins52Options: function, bias-disable, bias-pull-up, bias-pull-down,53 drive-open-drain.54 55Note that many of these properties are only valid for certain specific pins.56See the Palmas device datasheet for complete details regarding which pins57support which functionality.58 59Valid values for pin names are:60 gpio0, gpio1, gpio2, gpio3, gpio4, gpio5, gpio6, gpio7, gpio8, gpio9,61 gpio10, gpio11, gpio12, gpio13, gpio14, gpio15, vac, powergood,62 nreswarm, pwrdown, gpadc_start, reset_in, nsleep, enable1, enable2,63 int.64 65Valid value of function names are:66 gpio, led, pwm, regen, sysen, clk32kgaudio, id, vbus_det, chrg_det,67 vac, vacok, powergood, usb_psel, msecure, pwrhold, int, nreswarm,68 simrsto, simrsti, low_vbat, wireless_chrg1, rcm, pwrdown, gpadc_start,69 reset_in, nsleep, enable.70 71There are 4 special functions: opt0, opt1, opt2 and opt3. If any of these72functions is selected then directly pins register will be written with 0, 1, 273or 3 respectively if it is valid for that pins or list of pins.74 75Example:76 palmas: tps65913 {77 ....78 pinctrl {79 compatible = "ti,tps65913-pinctrl";80 ti,palmas-enable-dvfs1;81 pinctrl-names = "default";82 pinctrl-0 = <&palmas_pins_state>;83 84 palmas_pins_state: pinmux {85 gpio0 {86 pins = "gpio0";87 function = "id";88 bias-pull-up;89 };90 91 vac {92 pins = "vac";93 function = "vacok";94 bias-pull-down;95 };96 97 gpio5 {98 pins = "gpio5";99 function = "opt0";100 drive-open-drain = <1>;101 };102 };103 };104 ....105 };106