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NFC: Make EN2 pin optional in the TRF7970A driver

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Make the EN2 pin optional. This is useful for boards,
which have this pin fix wired, for example to ground.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Guan Ben <ben.guan@cn.bosch.com>
Signed-off-by: Mark Jonas <mark.jonas@de.bosch.com>
Signed-off-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Guan Ben
2017-02-07 06:22:04 +01:00
committed by Samuel Ortiz
parent 96bd0b5e55
commit ce69b95ca4
2 changed files with 16 additions and 14 deletions
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4
Documentation/devicetree/bindings/net/nfc/trf7970a.txt
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@@ -5,8 +5,8 @@ Required properties:
- spi-max-frequency: Maximum SPI frequency (<= 2000000).
- interrupt-parent: phandle of parent interrupt handler.
- interrupts: A single interrupt specifier.
- ti,enable-gpios: Two GPIO entries used for 'EN' and 'EN2' pins on the
TRF7970A.
- ti,enable-gpios: One or two GPIO entries used for 'EN' and 'EN2' pins on the
TRF7970A. EN2 is optional.
- vin-supply: Regulator for supply voltage to VIN pin
Optional SoC Specific Properties: