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| author |   Peter Ujfalusi <peter.ujfalusi@ti.com> | 2019-01-03 16:05:51 +0200 |
|---|---|---|
| committer |   Mark Brown <broonie@kernel.org> | 2019-01-04 15:20:44 +0000 |
| commit | 4664b94c98b4f9fdd3845da41d5c65288e59c66c (patch) | |
| tree | 2c0a5c9f41aadd12d357657612db4cfa7025c0cb | |
| parent | Merge branch 'asoc-4.21' into HEAD (diff) | |
| download | linux-dev-4664b94c98b4f9fdd3845da41d5c65288e59c66c.tar.xz linux-dev-4664b94c98b4f9fdd3845da41d5c65288e59c66c.zip | |
ASoC: davinci-mcasp: Document GPIO support
McASP pins can be used as GPIO, add optional section to enable GPIO support
for McASP.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
| -rw-r--r-- | Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt b/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt index b279b6072bd5..a58f79f5345c 100644 --- a/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt +++ b/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt @@ -45,6 +45,23 @@ Optional properties: - fck_parent : Should contain a valid clock name which will be used as parent for the McASP fck +Optional GPIO support: +If any McASP pin need to be used as GPIO then the McASP node must have: +... + gpio-controller + #gpio-cells = <2>; +... + +When requesting a GPIO, the first parameter is the PIN index in McASP_P* +registers. +For example to request the AXR2 pin of mcasp8: +function-gpios = <&mcasp8 2 0>; + +Or to request the ACLKR pin of mcasp8: +function-gpios = <&mcasp8 29 0>; + +For generic gpio information, please refer to bindings/gpio/gpio.txt + Example: mcasp0: mcasp0@1d00000 { |