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ASoC: cs35l35: Add device tree binding for I2S drive configuration

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Add a binding for setting how the I2S pins are driven in unused slots,
currently the chip will just use the default of drive 0, however
this causes issues when multiple devices are attached to the same bus.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Acked-by: Brian Austin <brian.austin@cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Charles Keepax 2017-03-08 16:42:48 +00:00 committed by Mark Brown
parent 1bb06ada03
commit 45114c364d
1 changed files with 5 additions and 0 deletions
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5
Documentation/devicetree/bindings/sound/cs35l35.txt
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@ -37,6 +37,11 @@ Optional properties:
Table 3-10 of the datasheet lists drive-strength specifications
0 = 1x (Default)
1 = .5x
- cirrus,sp-drv-unused : Determines how unused slots should be driven on the
Serial Port.
0 - Hi-Z
2 - Drive 0's (Default)
3 - Drive 1's
- cirrus,bst-pdn-fet-on : Boolean to determine if the Boost PDN control
powers down with a rectification FET On or Off. If VSPK is supplied