Messages in this thread | | | Date | Fri, 9 Dec 2016 15:06:55 -0600 | From | Rob Herring <> | Subject | Re: [PATCH] gpio: mmio: add support for NI 169445 NAND GPIO |
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On Fri, Dec 02, 2016 at 09:37:02AM -0600, Nathan Sullivan wrote: > 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> > --- > "devicetree: add vendor prefix for National Instruments" added the ni vendor prefix. > > This patch is needed for "MIPS: NI 169445 board support", so that GPIO NAND can work. > > .../bindings/gpio/ni,169445-nand-gpio.txt | 36 ++++++++++++++++++++++ > drivers/gpio/gpio-mmio.c | 1 + > 2 files changed, 37 insertions(+) > create mode 100644 Documentation/devicetree/bindings/gpio/ni,169445-nand-gpio.txt > > 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 0000000..ca2c14f > --- /dev/null > +++ b/Documentation/devicetree/bindings/gpio/ni,169445-nand-gpio.txt > @@ -0,0 +1,36 @@ > +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
-names with a single entry is pointless.
> + - 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. > + > +Examples: > + gpio1: nand-gpio-out@1f300010 {
gpio-controller@...
> + compatible = "ni,169445-nand-gpio"; > + reg = <0x1f300010 0x4>; > + reg-names = "dat"; > + gpio-controller; > + #gpio-cells = <2>; > + ngpios = <5>; > + }; > + > + gpio2: nand-gpio-in@1f300014 {
ditto
> + compatible = "ni,169445-nand-gpio"; > + reg = <0x1f300014 0x4>; > + reg-names = "dat"; > + gpio-controller; > + #gpio-cells = <2>; > + ngpios = <1>; > + };
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