Re: [PATCH V5 4/5] gpio: max77620: add gpio driver for MAX77620/MAX20024

Rob Herring
2016-01-29T16:30:35Z

On Wed, Jan 27, 2016 at 07:40:07PM +0530, Laxman Dewangan wrote:
> MAXIM Semiconductor's PMIC, MAX77620/MAX20024 has 8 GPIO
> pins. It also supports interrupts from these pins.
>
> Add GPIO driver for these pins to control via GPIO APIs.
>
> Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
> Signed-off-by: Chaitanya Bandi <bandik@nvidia.com>
> ---
> Changes from V1:
> - Use the gpiochip_add_data and get the chip data from core APIs.
> - Cleanups based on comment received on mfd/rtc.
> - Avoid duplication on error message.
>
> Changes form V2:
> - Run coccicheck and checkpatch in strict mode for the alignment.
> - update based on api changes from core.
>
> Changes from V3:
> - Change all sys initcall to module driver.
> - change the max77620_read argument to unisgned int from u8.
>
> Changes from V4:
> - Added DT binding document as devicetree/bindings/gpio/gpio-max77620.txt
>
> .../devicetree/bindings/gpio/gpio-max77620.txt | 25 ++
> drivers/gpio/Kconfig | 9 +
> drivers/gpio/Makefile | 1 +
> drivers/gpio/gpio-max77620.c | 292 +++++++++++++++++++++
> 4 files changed, 327 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/gpio/gpio-max77620.txt
> create mode 100644 drivers/gpio/gpio-max77620.c
>
> diff --git a/Documentation/devicetree/bindings/gpio/gpio-max77620.txt b/Documentation/devicetree/bindings/gpio/gpio-max77620.txt
> new file mode 100644
> index 0000000..410e716
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/gpio/gpio-max77620.txt
> @@ -0,0 +1,25 @@
> +GPIO driver for MAX77620 Power management IC from Maxim Semiconductor.
> +
> +Device has 8 GPIO pins which can be configured as GPIO as well as the
> +special IO functions.
> +
> +Required properties:
> +-------------------
> +- gpio-controller : Marks the device node as a gpio controller.
> +- #gpio-cells : Should be two. The first cell is the pin number and
> + the second cell is used to specify the gpio polarity:
> + 0 = active high
> + 1 = active low
> +For more details, please refer generic GPIO DT binding document
> +<devicetree/bindings/gpio/gpio.txt>.

I would just fold these 2 properties into the main max77620 document.

Rob