1Palmas Pincontrol bindings 2 3The pins of Palmas device can be set on different option and provides 4the 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 the 13common pinctrl bindings used by client devices, including the meaning of the 14phrase "pin configuration node". 15 16Palmas's pin configuration nodes act as a container for an arbitrary number of 17subnodes. Each of these subnodes represents some desired configuration for a 18list of pins. This configuration can include the mux function to select on 19those 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 enumerated 23and processed purely based on their content. 24 25Each subnode only affects those parameters that are explicitly listed. In 26other words, a subnode that lists a mux function but no pin configuration 27parameters implies no information about any pin configuration parameters. 28Similarly, a pin subnode that describes a pullup parameter implies no 29information 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 interface 35- ti,palmas-enable-dvfs2: Enable DVFS2. Configure pins for DVFS2 mode. 36 Selection primary or secondary function associated to GPADC_START 37 and SYSEN2 pin/pad for DVFS2 interface 38- ti,palmas-override-powerhold: This is applicable for PMICs for which 39 GPIO7 is configured in POWERHOLD mode which has higher priority 40 over DEV_ON bit and keeps the PMIC supplies on even after the DEV_ON 41 bit is turned off. This property enables driver to over ride the 42 POWERHOLD value to GPIO7 so as to turn off the PMIC in power off 43 scenarios. So for GPIO7 if ti,palmas-override-powerhold is set 44 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 of 46 power off scenarios the driver will over ride the mux value. 47 48This binding uses the following generic properties as defined in 49pinctrl-bindings.txt: 50 51Required: pins 52Options: 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 pins 57support 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 these 72functions is selected then directly pins register will be written with 0, 1, 2 73or 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