diff options
| author | Nathan Sullivan <nathan.sullivan@ni.com> | 2017-03-14 19:13:22 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2017-03-23 11:49:06 +0300 |
| commit | b8c90199b51aa59da06e1a82a22ba11e69bd8150 (patch) | |
| tree | 5817ea23b4481e7484e277a489c5f09b8ab924f5 | |
| parent | d8307c09206b35a9526bfdf076c9f516c0b5e6f1 (diff) | |
| download | linux-b8c90199b51aa59da06e1a82a22ba11e69bd8150.tar.xz | |
gpio: mmio: add support for NI 169445 NAND GPIO
The GPIO-based NAND controller on National Instruments 169445 hardware
exposes a set of simple lines for the control signals.
Signed-off-by: Nathan Sullivan <nathan.sullivan@ni.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
| -rw-r--r-- | Documentation/devicetree/bindings/gpio/ni,169445-nand-gpio.txt | 38 | ||||
| -rw-r--r-- | drivers/gpio/gpio-mmio.c | 1 |
2 files changed, 39 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; + }; diff --git a/drivers/gpio/gpio-mmio.c b/drivers/gpio/gpio-mmio.c index d7d03ad052d0..f7da40e46c55 100644 --- a/drivers/gpio/gpio-mmio.c +++ b/drivers/gpio/gpio-mmio.c @@ -575,6 +575,7 @@ static void __iomem *bgpio_map(struct platform_device *pdev, static const struct of_device_id bgpio_of_match[] = { { .compatible = "brcm,bcm6345-gpio" }, { .compatible = "wd,mbl-gpio" }, + { .compatible = "ni,169445-nand-gpio" }, { } }; MODULE_DEVICE_TABLE(of, bgpio_of_match); |