diff options
| author | Drew Fustini <drew@beagleboard.org> | 2020-09-19 22:08:37 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2020-09-30 11:41:15 +0200 |
| commit | 3163508b207f4622ba6f288127d68656a98e36a6 (patch) | |
| tree | 1dfa5af5f39dd379e0de00a95f424b966422bfa1 /Documentation/devicetree/bindings/pinctrl | |
| parent | 48548c786572f96cae5b7238da5338aa11cc9d34 (diff) | |
| download | linux-3163508b207f4622ba6f288127d68656a98e36a6.tar.bz2 | |
pinctrl: Document pinctrl-single,pins when #pinctrl-cells = 2
Document the values in pinctrl-single,pins when #pinctrl-cells = <2>
Fixes: 27c90e5e48d0 ("ARM: dts: am33xx-l4: change #pinctrl-cells from 1 to 2")
Reported-by: Trent Piepho <tpiepho@gmail.com>
Signed-off-by: Drew Fustini <drew@beagleboard.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/linux-omap/3139716.CMS8C0sQ7x@zen.local/
Link: https://lore.kernel.org/r/20200919200836.3218536-1-drew@beagleboard.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'Documentation/devicetree/bindings/pinctrl')
| -rw-r--r-- | Documentation/devicetree/bindings/pinctrl/pinctrl-single.txt | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-single.txt b/Documentation/devicetree/bindings/pinctrl/pinctrl-single.txt index e705acd3612c..f903eb4471f8 100644 --- a/Documentation/devicetree/bindings/pinctrl/pinctrl-single.txt +++ b/Documentation/devicetree/bindings/pinctrl/pinctrl-single.txt @@ -94,16 +94,23 @@ pinctrl-single,bit-per-mux is set), and uses the common pinctrl bindings as specified in the pinctrl-bindings.txt document in this directory. The pin configuration nodes for pinctrl-single are specified as pinctrl -register offset and value pairs using pinctrl-single,pins. Only the bits -specified in pinctrl-single,function-mask are updated. For example, setting -a pin for a device could be done with: +register offset and values using pinctrl-single,pins. Only the bits specified +in pinctrl-single,function-mask are updated. + +When #pinctrl-cells = 1, then setting a pin for a device could be done with: pinctrl-single,pins = <0xdc 0x118>; -Where 0xdc is the offset from the pinctrl register base address for the -device pinctrl register, and 0x118 contains the desired value of the -pinctrl register. See the device example and static board pins example -below for more information. +Where 0xdc is the offset from the pinctrl register base address for the device +pinctrl register, and 0x118 contains the desired value of the pinctrl register. + +When #pinctrl-cells = 2, then setting a pin for a device could be done with: + + pinctrl-single,pins = <0xdc 0x30 0x07>; + +Where 0x30 is the pin configuration value and 0x07 is the pin mux mode value. +These two values are OR'd together to produce the value stored at offset 0xdc. +See the device example and static board pins example below for more information. In case when one register changes more than one pin's mux the pinctrl-single,bits need to be used which takes three parameters: |