mirror of
https://github.com/torvalds/linux.git
synced 2024-12-24 20:01:55 +00:00
791d3ef2e1
'interrupt-parent' is often documented as part of define bindings, but it is really outside the scope of a device binding. It's never required in a given node as it is often inherited from a parent node. Or it can be implicit if a parent node is an 'interrupt-controller' node. So remove it from all the binding files. Cc: Mark Rutland <mark.rutland@arm.com> Cc: devicetree@vger.kernel.org Signed-off-by: Rob Herring <robh@kernel.org>
73 lines
2.2 KiB
Plaintext
73 lines
2.2 KiB
Plaintext
SEMTECH SX150x GPIO expander bindings
|
|
|
|
Please refer to pinctrl-bindings.txt, ../gpio/gpio.txt, and
|
|
../interrupt-controller/interrupts.txt for generic information regarding
|
|
pin controller, GPIO, and interrupt bindings.
|
|
|
|
Required properties:
|
|
- compatible: should be one of :
|
|
"semtech,sx1501q",
|
|
"semtech,sx1502q",
|
|
"semtech,sx1503q",
|
|
"semtech,sx1504q",
|
|
"semtech,sx1505q",
|
|
"semtech,sx1506q",
|
|
"semtech,sx1507q",
|
|
"semtech,sx1508q",
|
|
"semtech,sx1509q".
|
|
|
|
- reg: The I2C slave address for this device.
|
|
|
|
- #gpio-cells: Should be 2. The first cell is the GPIO number and the
|
|
second cell is used to specify optional parameters:
|
|
bit 0: polarity (0: normal, 1: inverted)
|
|
|
|
- gpio-controller: Marks the device as a GPIO controller.
|
|
|
|
Optional properties :
|
|
- interrupts: Interrupt specifier for the controllers interrupt.
|
|
|
|
- interrupt-controller: Marks the device as a interrupt controller.
|
|
|
|
- semtech,probe-reset: Will trigger a reset of the GPIO expander on probe,
|
|
only for sx1507q, sx1508q and sx1509q
|
|
|
|
The GPIO expander can optionally be used as an interrupt controller, in
|
|
which case it uses the default two cell specifier.
|
|
|
|
Required properties for pin configuration sub-nodes:
|
|
- pins: List of pins to which the configuration applies.
|
|
|
|
Optional properties for pin configuration sub-nodes:
|
|
----------------------------------------------------
|
|
- bias-disable: disable any pin bias, except the OSCIO pin
|
|
- bias-pull-up: pull up the pin, except the OSCIO pin
|
|
- bias-pull-down: pull down the pin, except the OSCIO pin
|
|
- bias-pull-pin-default: use pin-default pull state, except the OSCIO pin
|
|
- drive-push-pull: drive actively high and low
|
|
- drive-open-drain: drive with open drain only for sx1507q, sx1508q and sx1509q and except the OSCIO pin
|
|
- output-low: set the pin to output mode with low level
|
|
- output-high: set the pin to output mode with high level
|
|
|
|
Example:
|
|
|
|
i2c0gpio-expander@20{
|
|
#gpio-cells = <2>;
|
|
#interrupt-cells = <2>;
|
|
compatible = "semtech,sx1506q";
|
|
reg = <0x20>;
|
|
interrupt-parent = <&gpio_1>;
|
|
interrupts = <16 0>;
|
|
|
|
gpio-controller;
|
|
interrupt-controller;
|
|
|
|
pinctrl-names = "default";
|
|
pinctrl-0 = <&gpio1_cfg_pins>;
|
|
|
|
gpio1_cfg_pins: gpio1-cfg {
|
|
pins = "gpio1";
|
|
bias-pull-up;
|
|
};
|
|
};
|