diff options
| author | Ben Hutchings <ben.hutchings@codethink.co.uk> | 2015-06-30 17:53:59 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2015-08-24 10:44:54 +0200 |
| commit | 5b9eaa5659b32cf6c85a492d2e3bfa7a3a413144 (patch) | |
| tree | dbcdccf7c6b25f9459b5e20e6879ca919df08eeb /Documentation/devicetree/bindings/pinctrl/renesas,pfc-pinctrl.txt | |
| parent | 15ee1f7d1432c8a781df5d8f92c18bd952088667 (diff) | |
pinctrl: sh-pfc: Implement pinconf power-source param for voltage switching
The pfc in the R8A7790 (and probably others in the R-Car gen 2 family)
supports switching SDHI signals between 3.3V and 1.8V nominal voltage,
and the SD driver should do that when switching to and from UHS modes.
Add a flag for pins that have configurable I/O voltage and SoC
operations to get and set the nominal voltage. Implement the pinconf
power-source parameter using these operations.
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'Documentation/devicetree/bindings/pinctrl/renesas,pfc-pinctrl.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/pinctrl/renesas,pfc-pinctrl.txt | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/pinctrl/renesas,pfc-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/renesas,pfc-pinctrl.txt index e089142cfb14..9496934528bd 100644 --- a/Documentation/devicetree/bindings/pinctrl/renesas,pfc-pinctrl.txt +++ b/Documentation/devicetree/bindings/pinctrl/renesas,pfc-pinctrl.txt @@ -71,7 +71,9 @@ Pin Configuration Node Properties: The pin configuration parameters use the generic pinconf bindings defined in pinctrl-bindings.txt in this directory. The supported parameters are -bias-disable, bias-pull-up and bias-pull-down. +bias-disable, bias-pull-up, bias-pull-down and power-source. For pins that +have a configurable I/O voltage, the power-source value should be the +nominal I/O voltage in millivolts. GPIO |