| Nathan Sullivan | b8c9019 | 2017-03-14 11:13:22 -0500 | [diff] [blame] | 1 | Bindings for the National Instruments 169445 GPIO NAND controller |
| 2 | |
| 3 | The 169445 GPIO NAND controller has two memory mapped GPIO registers, one |
| 4 | for input (the ready signal) and one for output (control signals). It is |
| 5 | intended to be used with the GPIO NAND driver. |
| 6 | |
| 7 | Required properties: |
| 8 | - compatible: should be "ni,169445-nand-gpio" |
| 9 | - reg-names: must contain |
| 10 | "dat" - data register |
| 11 | - reg: address + size pairs describing the GPIO register sets; |
| 12 | order must correspond with the order of entries in reg-names |
| 13 | - #gpio-cells: must be set to 2. The first cell is the pin number and |
| 14 | the second cell is used to specify the gpio polarity: |
| 15 | 0 = active high |
| 16 | 1 = active low |
| 17 | - gpio-controller: Marks the device node as a gpio controller. |
| 18 | |
| 19 | Optional properties: |
| 20 | - no-output: disables driving output on the pins |
| 21 | |
| 22 | Examples: |
| 23 | gpio1: nand-gpio-out@1f300010 { |
| 24 | compatible = "ni,169445-nand-gpio"; |
| 25 | reg = <0x1f300010 0x4>; |
| 26 | reg-names = "dat"; |
| 27 | gpio-controller; |
| 28 | #gpio-cells = <2>; |
| 29 | }; |
| 30 | |
| 31 | gpio2: nand-gpio-in@1f300014 { |
| 32 | compatible = "ni,169445-nand-gpio"; |
| 33 | reg = <0x1f300014 0x4>; |
| 34 | reg-names = "dat"; |
| 35 | gpio-controller; |
| 36 | #gpio-cells = <2>; |
| 37 | no-output; |
| 38 | }; |