9e80f9064e
Since the I2C sx150x GPIO expander driver uses platform_data to manage
the pins configurations, rewrite the driver as a pinctrl driver using
pinconf to get/set pin configurations from DT or debugfs.
The pinctrl driver is functionnally equivalent as the gpio-only driver
and can use DT for pinconf. The platform_data confirmation is dropped.
This patchset removed the gpio-only driver and selects the Pinctrl driver
config instead. This patchset also migrates the gpio dt-bindings to pinctrl
and add the pinctrl optional properties.
The driver was tested with a SX1509 device on a BeagleBone black with
interrupt support and on an X86_64 machine over an I2C to USB converter.
This is a fixed version that builds and runs on non-OF platforms and on
arm based OF. The GPIO version is removed and the bindings are also moved
to the pinctrl bindings.
Changes since v2
- rebased on v4.9-rc1
- removed MODULE_DEVICE_TABLE as in upstream bb411e771b
("gpio: sx150x: fix implicit assumption module.h is present")
Changes since v1
- Fix Kconfig descriptions on pinctrl and gpio
- Fix Kconfig dependency
- Remove oscio support for non-789 devices
- correct typo in dt bindings
- remove probe reset for non-789 devices
Changes since RFC
- Put #ifdef CONFIG_OF/CONFIG_OF_GPIO to remove OF code for non-of platforms
- No more rely on OF_GPIO config
- Moved and enhanced bindings to pinctrl bindings
- Removed gpio-sx150x.c
- Temporary select PINCTRL_SX150X when GPIO_SX150X
- Temporary mark GPIO_SX150X as deprecated
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Tested-by: Peter Rosin <peda@axentia.se>
Acked-by: Rob Herring <robh@kernel.org>
ested-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
70 lines
2.1 KiB
Plaintext
70 lines
2.1 KiB
Plaintext
SEMTECH SX150x GPIO expander bindings
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Please refer to pinctrl-bindings.txt, ../gpio/gpio.txt, and
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../interrupt-controller/interrupts.txt for generic information regarding
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pin controller, GPIO, and interrupt bindings.
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Required properties:
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- compatible: should be one of :
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"semtech,sx1506q",
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"semtech,sx1508q",
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"semtech,sx1509q",
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"semtech,sx1502q".
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- reg: The I2C slave address for this device.
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- #gpio-cells: Should be 2. The first cell is the GPIO number and the
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second cell is used to specify optional parameters:
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bit 0: polarity (0: normal, 1: inverted)
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- gpio-controller: Marks the device as a GPIO controller.
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Optional properties :
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- interrupt-parent: phandle of the parent interrupt controller.
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- interrupts: Interrupt specifier for the controllers interrupt.
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- interrupt-controller: Marks the device as a interrupt controller.
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- semtech,probe-reset: Will trigger a reset of the GPIO expander on probe,
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only for sx1508q and sx1509q
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The GPIO expander can optionally be used as an interrupt controller, in
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which case it uses the default two cell specifier.
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Required properties for pin configuration sub-nodes:
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- pins: List of pins to which the configuration applies.
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Optional properties for pin configuration sub-nodes:
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----------------------------------------------------
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- bias-disable: disable any pin bias, except the OSCIO pin
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- bias-pull-up: pull up the pin, except the OSCIO pin
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- bias-pull-down: pull down the pin, except the OSCIO pin
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- bias-pull-pin-default: use pin-default pull state, except the OSCIO pin
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- drive-push-pull: drive actively high and low
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- drive-open-drain: drive with open drain only for sx1508q and sx1509q and except the OSCIO pin
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- output-low: set the pin to output mode with low level
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- output-high: set the pin to output mode with high level
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Example:
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i2c0gpio-expander@20{
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#gpio-cells = <2>;
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#interrupt-cells = <2>;
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compatible = "semtech,sx1506q";
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reg = <0x20>;
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interrupt-parent = <&gpio_1>;
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interrupts = <16 0>;
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gpio-controller;
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interrupt-controller;
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pinctrl-names = "default";
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pinctrl-0 = <&gpio1_cfg_pins>;
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gpio1_cfg_pins: gpio1-cfg {
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pins = "gpio1";
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bias-pull-up;
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};
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};
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