gpio: 74x164: add dt support for nxp's 74x594
The chip is also an 8 bit shift register which works out of the box as a GPO
expander with this patch
Signed-off-by: Nicolas Saenz Julienne <nicolassaenzj@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/Documentation/devicetree/bindings/gpio/gpio-74x164.txt b/Documentation/devicetree/bindings/gpio/gpio-74x164.txt
index cc26080..ce1b223 100644
--- a/Documentation/devicetree/bindings/gpio/gpio-74x164.txt
+++ b/Documentation/devicetree/bindings/gpio/gpio-74x164.txt
@@ -1,7 +1,9 @@
* Generic 8-bits shift register GPIO driver
Required properties:
-- compatible : Should be "fairchild,74hc595"
+- compatible: Should contain one of the following:
+ "fairchild,74hc595"
+ "nxp,74lvc594"
- reg : chip select number
- gpio-controller : Marks the device node as a gpio controller.
- #gpio-cells : Should be two. The first cell is the pin number and
diff --git a/drivers/gpio/gpio-74x164.c b/drivers/gpio/gpio-74x164.c
index 62291a8..80f9ddf 100644
--- a/drivers/gpio/gpio-74x164.c
+++ b/drivers/gpio/gpio-74x164.c
@@ -177,6 +177,7 @@
static const struct of_device_id gen_74x164_dt_ids[] = {
{ .compatible = "fairchild,74hc595" },
+ { .compatible = "nxp,74lvc594" },
{},
};
MODULE_DEVICE_TABLE(of, gen_74x164_dt_ids);
