diff options
Diffstat (limited to 'Documentation/devicetree/bindings/net/nfc/trf7970a.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/net/nfc/trf7970a.txt | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/Documentation/devicetree/bindings/net/nfc/trf7970a.txt b/Documentation/devicetree/bindings/net/nfc/trf7970a.txt index 32b35a07abe4..c627bbb3009e 100644 --- a/Documentation/devicetree/bindings/net/nfc/trf7970a.txt +++ b/Documentation/devicetree/bindings/net/nfc/trf7970a.txt @@ -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: @@ -21,6 +21,8 @@ Optional SoC Specific Properties: - t5t-rmb-extra-byte-quirk: Specify that the trf7970a has the erratum where an extra byte is returned by Read Multiple Block commands issued to Type 5 tags. +- vdd-io-supply: Regulator specifying voltage for vdd-io +- clock-frequency: Set to specify that the input frequency to the trf7970a is 13560000Hz or 27120000Hz Example (for ARM-based BeagleBone with TRF7970A on SPI1): @@ -39,10 +41,12 @@ Example (for ARM-based BeagleBone with TRF7970A on SPI1): <&gpio2 5 GPIO_ACTIVE_LOW>; vin-supply = <&ldo3_reg>; vin-voltage-override = <5000000>; + vdd-io-supply = <&ldo2_reg>; autosuspend-delay = <30000>; irq-status-read-quirk; en2-rf-quirk; t5t-rmb-extra-byte-quirk; + clock-frequency = <27120000>; status = "okay"; }; }; |