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 <[email protected]>
---
"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
+ - 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 {
+ compatible = "ni,169445-nand-gpio";
+ reg = <0x1f300010 0x4>;
+ reg-names = "dat";
+ gpio-controller;
+ #gpio-cells = <2>;
+ ngpios = <5>;
+ };
+
+ gpio2: nand-gpio-in@1f300014 {
+ compatible = "ni,169445-nand-gpio";
+ reg = <0x1f300014 0x4>;
+ reg-names = "dat";
+ gpio-controller;
+ #gpio-cells = <2>;
+ ngpios = <1>;
+ };
diff --git a/drivers/gpio/gpio-mmio.c b/drivers/gpio/gpio-mmio.c
index d7d03ad..f7da40e 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);
--
2.1.4
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 <[email protected]>
> ---
> "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>;
> + };