hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

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>
This commit is contained in:
Stephen Warren 2013-08-06 11:10:32 -06:00 committed by Linus Walleij
parent 2c9fdcf17e
commit 87311d0455
1 changed files with 16 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
View File

@ -138,6 +138,9 @@ structure of the DT nodes that contain these properties.
Supported generic properties are: 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-disable - disable any pin bias
bias-high-impedance - high impedance mode ("third-state", "floating") bias-high-impedance - high impedance mode ("third-state", "floating")
bias-bus-hold - latch weakly 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 Some of the generic properties take arguments. For those that do, the
arguments are described below. 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 - 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. supporting it the pull strength in Ohm. bias-disable will disable the pull.