@@ -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{
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 <andrew.smirnov@gmail.com> --- .../devicetree/bindings/gpio/gpio-sx150x.txt | 29 ++++++++++++++++++++++ 1 file changed, 29 insertions(+)