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| Commit | Line | Data |
|---|---|---|
| 7916c0c3 LD |
1 | Pincontrol driver for MAX77620 Power management IC from Maxim Semiconductor. |
| 2 | ||
| 3 | Device has 8 GPIO pins which can be configured as GPIO as well as the | |
| 4 | special IO functions. | |
| 5 | ||
| 6 | Please refer file <devicetree/bindings/pinctrl/pinctrl-bindings.txt> | |
| 7 | for details of the common pinctrl bindings used by client devices, | |
| 8 | including the meaning of the phrase "pin configuration node". | |
| 9 | ||
| 10 | Optional Pinmux properties: | |
| 11 | -------------------------- | |
| 12 | Following properties are required if default setting of pins are required | |
| 13 | at boot. | |
| 14 | - pinctrl-names: A pinctrl state named per <pinctrl-binding.txt>. | |
| 15 | - pinctrl[0...n]: Properties to contain the phandle for pinctrl states per | |
| 16 | <pinctrl-binding.txt>. | |
| 17 | ||
| 18 | The pin configurations are defined as child of the pinctrl states node. Each | |
| 19 | sub-node have following properties: | |
| 20 | ||
| 21 | Required properties: | |
| 22 | ------------------ | |
| 23 | - pins: List of pins. Valid values of pins properties are: | |
| 24 | gpio0, gpio1, gpio2, gpio3, gpio4, gpio5, gpio6, gpio7. | |
| 25 | ||
| 26 | Optional properties: | |
| 27 | ------------------- | |
| 28 | Following are optional properties defined as pinmux DT binding document | |
| 29 | <pinctrl-bindings.txt>. Absence of properties will leave the configuration | |
| 30 | on default. | |
| 31 | function, | |
| 32 | drive-push-pull, | |
| 33 | drive-open-drain, | |
| 34 | bias-pull-up, | |
| 35 | bias-pull-down. | |
| 36 | ||
| 37 | Valid values for function properties are: | |
| 38 | gpio, lpm-control-in, fps-out, 32k-out, sd0-dvs-in, sd1-dvs-in, | |
| 39 | reference-out | |
| 40 | ||
| 41 | Theres is also customised properties for the GPIO1, GPIO2 and GPIO3. These | |
| 42 | customised properties are required to configure FPS configuration parameters | |
| 43 | of these GPIOs. Please refer <devicetree/bindings/mfd/max77620.txt> for more | |
| 44 | detail of Flexible Power Sequence (FPS). | |
| 45 | ||
| 46 | - maxim,active-fps-source: FPS source for the GPIOs to get | |
| 47 | enabled/disabled when system is in | |
| 48 | active state. Valid values are: | |
| 49 | - MAX77620_FPS_SRC_0, | |
| 50 | FPS source is FPS0. | |
| 51 | - MAX77620_FPS_SRC_1, | |
| 52 | FPS source is FPS1 | |
| 53 | - MAX77620_FPS_SRC_2 and | |
| 54 | FPS source is FPS2 | |
| 55 | - MAX77620_FPS_SRC_NONE. | |
| 56 | GPIO is not controlled | |
| 57 | by FPS events and it gets | |
| 58 | enabled/disabled by register | |
| 59 | access. | |
| 60 | Absence of this property will leave | |
| 61 | the FPS configuration register for that | |
| 62 | GPIO to default configuration. | |
| 63 | ||
| 64 | - maxim,active-fps-power-up-slot: Sequencing event slot number on which | |
| 65 | the GPIO get enabled when | |
| 66 | master FPS input event set to HIGH. | |
| 67 | Valid values are 0 to 7. | |
| 68 | This is applicable if FPS source is | |
| 69 | selected as FPS0, FPS1 or FPS2. | |
| 70 | ||
| 71 | - maxim,active-fps-power-down-slot: Sequencing event slot number on which | |
| 72 | the GPIO get disabled when master | |
| 73 | FPS input event set to LOW. | |
| 74 | Valid values are 0 to 7. | |
| 75 | This is applicable if FPS source is | |
| 76 | selected as FPS0, FPS1 or FPS2. | |
| 77 | ||
| 78 | - maxim,suspend-fps-source: This is same as property | |
| 79 | "maxim,active-fps-source" but value | |
| 80 | get configured when system enters in | |
| 81 | to suspend state. | |
| 82 | ||
| 83 | - maxim,suspend-fps-power-up-slot: This is same as property | |
| 84 | "maxim,active-fps-power-up-slot" but | |
| 85 | this value get configured into FPS | |
| 86 | configuration register when system | |
| 87 | enters into suspend. | |
| 88 | This is applicable if suspend state | |
| 89 | FPS source is selected as FPS0, FPS1 or | |
| 90 | ||
| 91 | - maxim,suspend-fps-power-down-slot: This is same as property | |
| 92 | "maxim,active-fps-power-down-slot" but | |
| 93 | this value get configured into FPS | |
| 94 | configuration register when system | |
| 95 | enters into suspend. | |
| 96 | This is applicable if suspend state | |
| 97 | FPS source is selected as FPS0, FPS1 or | |
| 98 | FPS2. | |
| 99 | ||
| 100 | Example: | |
| 101 | -------- | |
| 102 | #include <dt-bindings/mfd/max77620.h> | |
| 103 | ... | |
| 104 | max77620@3c { | |
| 105 | ||
| 106 | pinctrl-names = "default"; | |
| 107 | pinctrl-0 = <&spmic_default>; | |
| 108 | ||
| 109 | spmic_default: pinmux@0 { | |
| 110 | pin_gpio0 { | |
| 111 | pins = "gpio0"; | |
| 112 | function = "gpio"; | |
| 113 | }; | |
| 114 | ||
| 115 | pin_gpio1 { | |
| 116 | pins = "gpio1"; | |
| 117 | function = "fps-out"; | |
| 118 | maxim,active-fps-source = <MAX77620_FPS_SRC_0>; | |
| 119 | }; | |
| 120 | ||
| 121 | pin_gpio2 { | |
| 122 | pins = "gpio2"; | |
| 123 | function = "fps-out"; | |
| 124 | maxim,active-fps-source = <MAX77620_FPS_SRC_1>; | |
| 125 | }; | |
| 126 | }; | |
| 127 | }; |