This patch documents the conversion of various platform data options that used to be availible to SX150x driver to device tree/OF form.
Signed-off-by: Andrey Smirnov <[email protected]> --- .../devicetree/bindings/gpio/gpio-sx150x.txt | 29 ++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/Documentation/devicetree/bindings/gpio/gpio-sx150x.txt b/Documentation/devicetree/bindings/gpio/gpio-sx150x.txt index c809acb..e96b554 100644 --- a/Documentation/devicetree/bindings/gpio/gpio-sx150x.txt +++ b/Documentation/devicetree/bindings/gpio/gpio-sx150x.txt @@ -26,6 +26,35 @@ The GPIO expander can optionally be used as an interrupt controller, in which case it uses the default two cell specifier as described in Documentation/devicetree/bindings/interrupt-controller/interrupts.txt. +Optional properties: + +- semtech,io-polarity: A bit-mask which enables polarity inversion for + each IO line in the expander. Setting the bit + at position n inverts the polarity of that IO + line, while clearing it results in normal + polarity. For chips with fewer than 16 IO pins, + high-end bits are ignored. + +- semtech,io-pullup: +- semtech,io-pulldown: A bit-mask which enables-or disables the + pull-up (pull-down) resistor for each IO line + in the expander. Setting the bit at position n + will enable the pull-down for the IO at the + corresponding offset. For chips with fewer + than 16 IO pins, high-end bits are ignored. + +- semtech,reset-during-probe: Boolean, if true, the driver will + trigger a full reset of the chip at the + beginning of the probe in order to place + it in a known state. + +- semtech,oscio-is-gpo: Boolean, if set to true, the driver will + configure OSCIO as a GPO instead of as an + oscillator, increasing the size of the GP(I)O + pool created by this expander by one. The + output-only GPO pin will be added at the end + of the block. + Example: i2c_gpio_expander@20{ -- 2.5.5
