diff options
| author | Stephen Warren <swarren@nvidia.com> | 2013-08-06 11:10:32 -0600 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2013-08-07 22:30:50 +0200 |
| commit | 87311d0455fb92cb6ad5ef539c9351a22c02e53a (patch) | |
| tree | 9932f3363a6731f4ed891f041c68876296122a90 /Documentation | |
| parent | 2c9fdcf17e0b629adb42ed86d0477620fcde2965 (diff) | |
pinctrl: add generic pins and functions properties
pinctrl bindings can benefit from generic property names that define
which pins a "pin configuration node" affects, and which mux function
to select onto those pins. Document new properties for this purpose so
that other bindings may refer to them.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt b/Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt index 31b0cb9de4f2..1958ca9f9e5c 100644 --- a/Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt +++ b/Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt @@ -138,6 +138,9 @@ structure of the DT nodes that contain these properties. Supported generic properties are: +pins - the list of pins that properties in the node + apply to +function - the mux function to select bias-disable - disable any pin bias bias-high-impedance - high impedance mode ("third-state", "floating") bias-bus-hold - latch weakly @@ -159,6 +162,19 @@ output-high - set the pin to output mode with high level Some of the generic properties take arguments. For those that do, the arguments are described below. +- pins takes a list of pin names or IDs as a required argument. The specific + binding for the hardware defines: + - Whether the entries are integers or strings, and their meaning. + +- function takes a list of function names/IDs as a required argument. The + specific binding for the hardware defines: + - Whether the entries are integers or strings, and their meaning. + - Whether only a single entry is allowed (which is applied to all entries + in the pins property), or whether there may alternatively be one entry per + entry in the pins property, in which case the list lengths must match, and + for each list index i, the function at list index i is applied to the pin + at list index i. + - 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. |