149 lines · plain
1ST Ericsson Nomadik pinmux controller2 3Required properties:4- compatible: "stericsson,db8500-pinctrl", "stericsson,db8540-pinctrl",5 "stericsson,stn8815-pinctrl"6- nomadik-gpio-chips: array of phandles to the corresponding GPIO chips7 (these have the register ranges used by the pin controller).8- prcm: phandle to the PRCMU managing the back end of this pin controller9 10Please refer to pinctrl-bindings.txt in this directory for details of the11common pinctrl bindings used by client devices, including the meaning of the12phrase "pin configuration node".13 14ST Ericsson's pin configuration nodes act as a container for an arbitrary number of15subnodes. Each of these subnodes represents some desired configuration for a16pin, a group, or a list of pins or groups. This configuration can include the17mux function to select on those pin(s)/group(s), and various pin configuration18parameters, such as input, output, pull up, pull down...19 20The name of each subnode is not important; all subnodes should be enumerated21and processed purely based on their content. The subnodes use the generic22pin multiplexing node layout from the standard pin control bindings23(see pinctrl-bindings.txt):24 25Required pin multiplexing subnode properties:26- function: A string containing the name of the function to mux to the27 pin or group.28- groups : An array of strings. Each string contains the name of a pin29 group that will be combined with the function to form a multiplexing30 set-up.31 32Required pin configuration subnode properties:33- pins: A string array describing the pins affected by the configuration34 in the node.35- ste,config: Handle of pin configuration node36 (e.g. ste,config = <&slpm_in_wkup_pdis>)37 38- ste,input : <0/1/2>39 0: input with no pull40 1: input with pull up,41 2: input with pull down,42 43- ste,output: <0/1/2>44 0: output low,45 1: output high,46 2: output (value is not specified).47 48- ste,sleep: <0/1>49 0: sleep mode disable,50 1: sleep mode enable.51 52- ste,sleep-input: <0/1/2/3>53 0: sleep input with no pull,54 1: sleep input with pull up,55 2: sleep input with pull down.56 3: sleep input and keep last input configuration (no pull, pull up or pull down).57 58- ste,sleep-output: <0/1/2>59 0: sleep output low,60 1: sleep output high,61 2: sleep output (value is not specified).62 63- ste,sleep-gpio: <0/1>64 0: disable sleep gpio mode,65 1: enable sleep gpio mode.66 67- ste,sleep-wakeup: <0/1>68 0: wake-up detection enabled,69 1: wake-up detection disabled.70 71- ste,sleep-pull-disable: <0/1>72 0: GPIO pull-up or pull-down resistor is enabled, when pin is an input,73 1: GPIO pull-up and pull-down resistor are disabled.74 75Example board file extract:76 77 pinctrl@80157000 {78 compatible = "stericsson,db8500-pinctrl";79 nomadik-gpio-chips = <&gpio0>, <&gpio1>, <&gpio2>, <&gpio3>;80 prcm = <&prcmu>;81 82 pinctrl-names = "default";83 84 slpm_in_wkup_pdis: slpm_in_wkup_pdis {85 ste,sleep = <1>;86 ste,sleep-input = <3>;87 ste,sleep-wakeup = <1>;88 ste,sleep-pull-disable = <0>;89 };90 91 slpm_out_hi_wkup_pdis: slpm_out_hi_wkup_pdis {92 ste,sleep = <1>;93 ste,sleep-output = <1>;94 ste,sleep-wakeup = <1>;95 ste,sleep-pull-disable = <0>;96 };97 98 slpm_out_wkup_pdis: slpm_out_wkup_pdis {99 ste,sleep = <1>;100 ste,sleep-output = <2>;101 ste,sleep-wakeup = <1>;102 ste,sleep-pull-disable = <0>;103 };104 105 uart0 {106 uart0_default_mux: uart0_mux {107 u0_default_mux {108 function = "u0";109 pins = "u0_a_1";110 };111 };112 uart0_default_mode: uart0_default {113 uart0_default_cfg1 {114 pins = "GPIO0", "GPIO2";115 ste,input = <1>;116 };117 118 uart0_default_cfg2 {119 pins = "GPIO1", "GPIO3";120 ste,output = <1>;121 };122 };123 uart0_sleep_mode: uart0_sleep {124 uart0_sleep_cfg1 {125 pins = "GPIO0", "GPIO2";126 ste,config = <&slpm_in_wkup_pdis>;127 };128 uart0_sleep_cfg2 {129 pins = "GPIO1";130 ste,config = <&slpm_out_hi_wkup_pdis>;131 };132 uart0_sleep_cfg3 {133 pins = "GPIO3";134 ste,config = <&slpm_out_wkup_pdis>;135 };136 };137 };138 };139 140 uart@80120000 {141 compatible = "arm,pl011", "arm,primecell";142 reg = <0x80120000 0x1000>;143 interrupts = <0 11 0x4>;144 145 pinctrl-names = "default","sleep";146 pinctrl-0 = <&uart0_default_mux>, <&uart0_default_mode>;147 pinctrl-1 = <&uart0_sleep_mode>;148 };149