diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-04 12:05:32 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-04 12:05:32 -0700 |
commit | 2bd80401743568ced7d303b008ae5298ce77e695 (patch) | |
tree | d70278682fca619f7d842faa7c5a5bdce5016cfa /Documentation/devicetree/bindings/gpio/ni,169445-nand-gpio.txt | |
parent | 99a7583de5ffd5cd82c407aad32bcbdeea09155b (diff) | |
parent | b86c86aa9805b25ee70071d084e618b2c40641b5 (diff) |
Merge tag 'gpio-v4.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO updates from Linus Walleij:
"This is the bulk of GPIO changes for the v4.12 kernel cycle.
Core changes:
- Return NULL from gpiod_get_optional() when GPIOLIB is disabled.
This was a much discussed change. It affects use cases where people
write drivers that might or might not be using GPIO resources. I
have decided that this is the lesser evil right now.
- Make gpiod_count() behave consistently across different hardware
descriptions.
- Fix the syntax around open drain/open source to not infer active
high/low semantics.
New drivers:
- A new single-register fixed-direction framework driver for hardware
that have lines controlled by a single register that just work in
one direction (out or in), including IRQ support.
- Support the Fintek F71889A GPIO SuperIO controller.
- Support the National NI 169445 MMIO GPIO.
- Support for the X-Gene derivative of the DWC GPIO controller
- Support for the Rohm BD9571MWV-M PMIC GPIO controller.
- Refactor the Gemini GPIO driver to a generic Faraday FTGPIO driver
and replace both the Gemini and the Moxa ART custom drivers with
this driver.
Driver improvements:
- A whole slew of drivers have their spinlocks chaned to raw
spinlocks as they provide irqchips, and thus we are progressing on
realtime compliance.
- Use devm_irq_alloc_descs() in a slew of drivers, getting managed
resources.
- Support for the embedded PWM controller inside the MVEBU driver.
- Debounce, open source and open drain support for the Aspeed driver.
- Misc smaller fixes like spelling and syntax and whatnot"
* tag 'gpio-v4.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (77 commits)
gpio: f7188x: Add a missing break
gpio: omap: return error if requested debounce time is not possible
gpio: Add ROHM BD9571MWV-M PMIC GPIO driver
gpio: gpio-wcove: fix GPIO IRQ status mask
gpio: DT bindings, move tca9554 from pcf857x to pca953x
gpio: move tca9554 from pcf857x to pca953x
gpio: arizona: Correct check whether the pin is an input
gpio: Add XRA1403 DTS binding documentation
dt-bindings: add exar to vendor prefixes list
gpio: gpio-wcove: fix irq pending status bit width
gpio: dwapb: use dwapb_read instead of readl_relaxed
gpio: aspeed: Add open-source and open-drain support
gpio: aspeed: Add debounce support
gpio: aspeed: dt: Add optional clocks property
gpio: aspeed: dt: Fix description alignment in bindings document
gpio: mvebu: Add limited PWM support
gpio: Use unsigned int for interrupt numbers
gpio: f7188x: Add F71889A GPIO support.
gpio: core: Decouple open drain/source flag with active low/high
gpio: arizona: Correct handling for reading input GPIOs
...
Diffstat (limited to 'Documentation/devicetree/bindings/gpio/ni,169445-nand-gpio.txt')
-rw-r--r-- | Documentation/devicetree/bindings/gpio/ni,169445-nand-gpio.txt | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/ni,169445-nand-gpio.txt b/Documentation/devicetree/bindings/gpio/ni,169445-nand-gpio.txt new file mode 100644 index 000000000000..ca2f8c745a27 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/ni,169445-nand-gpio.txt @@ -0,0 +1,38 @@ +Bindings for the National Instruments 169445 GPIO NAND controller + +The 169445 GPIO NAND controller has two memory mapped GPIO registers, one +for input (the ready signal) and one for output (control signals). It is +intended to be used with the GPIO NAND driver. + +Required properties: + - compatible: should be "ni,169445-nand-gpio" + - reg-names: must contain + "dat" - data register + - reg: address + size pairs describing the GPIO register sets; + order must correspond with the order of entries in reg-names + - #gpio-cells: must be set to 2. The first cell is the pin number and + the second cell is used to specify the gpio polarity: + 0 = active high + 1 = active low + - gpio-controller: Marks the device node as a gpio controller. + +Optional properties: + - no-output: disables driving output on the pins + +Examples: + gpio1: nand-gpio-out@1f300010 { + compatible = "ni,169445-nand-gpio"; + reg = <0x1f300010 0x4>; + reg-names = "dat"; + gpio-controller; + #gpio-cells = <2>; + }; + + gpio2: nand-gpio-in@1f300014 { + compatible = "ni,169445-nand-gpio"; + reg = <0x1f300014 0x4>; + reg-names = "dat"; + gpio-controller; + #gpio-cells = <2>; + no-output; + }; |