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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>
hifive-unleashed-5.1
Nicolas Saenz Julienne 2016-03-14 23:32:10 +00:00 committed by Linus Walleij
parent c6cc75fec0
commit 80018bd9cb
2 changed files with 4 additions and 1 deletions
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4
Documentation/devicetree/bindings/gpio/gpio-74x164.txt
View File

@ -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

1
drivers/gpio/gpio-74x164.c
View File

@ -177,6 +177,7 @@ static int gen_74x164_remove(struct spi_device *spi)
static const struct of_device_id gen_74x164_dt_ids[] = {
{ .compatible = "fairchild,74hc595" },
{ .compatible = "nxp,74lvc594" },
{},
};
MODULE_DEVICE_TABLE(of, gen_74x164_dt_ids);