diff options
Diffstat (limited to 'Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt b/Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt index f01d154090da..62d0f33fa65e 100644 --- a/Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt +++ b/Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt @@ -204,21 +204,22 @@ each single pin the number of required sub-nodes containing "pin" and maintain. For cases like this, the pin controller driver may use the pinmux helper -property, where the pin identifier is packed with mux configuration settings -in a single integer. +property, where the pin identifier is provided with mux configuration settings +in a pinmux group. A pinmux group consists of the pin identifier and mux +settings represented as a single integer or an array of integers. -The pinmux property accepts an array of integers, each of them describing +The pinmux property accepts an array of pinmux groups, each of them describing a single pin multiplexing configuration. pincontroller { state_0_node_a { - pinmux = <PIN_ID_AND_MUX>, <PIN_ID_AND_MUX>, ...; + pinmux = <PINMUX_GROUP>, <PINMUX_GROUP>, ...; }; }; Each individual pin controller driver bindings documentation shall specify -how those values (pin IDs and pin multiplexing configuration) are defined and -assembled together. +how pin IDs and pin multiplexing configuration are defined and assembled +together in a pinmux group. == Generic pin configuration node content == @@ -251,14 +252,20 @@ drive-push-pull - drive actively high and low drive-open-drain - drive with open drain drive-open-source - drive with open source drive-strength - sink or source at most X mA -input-enable - enable input on pin (no effect on output) -input-disable - disable input on pin (no effect on output) +input-enable - enable input on pin (no effect on output, such as + enabling an input buffer) +input-disable - disable input on pin (no effect on output, such as + disabling an input buffer) input-schmitt-enable - enable schmitt-trigger mode input-schmitt-disable - disable schmitt-trigger mode input-debounce - debounce mode with debound time X power-source - select between different power supplies low-power-enable - enable low power mode low-power-disable - disable low power mode +output-disable - disable output on a pin (such as disable an output + buffer) +output-enable - enable output on a pin without actively driving it + (such as enabling an output buffer) output-low - set the pin to output mode with low level output-high - set the pin to output mode with high level slew-rate - set the slew rate @@ -300,7 +307,7 @@ arguments are described below. - pinmux takes a list of pin IDs and mux settings as required argument. The specific bindings for the hardware defines: - How pin IDs and mux settings are defined and assembled together in a single - integer. + integer or an array of integers. - bias-pull-up, -down and -pin-default take as optional argument on hardware supporting it the pull strength in Ohm. bias-disable will disable the pull. |