# \[PATCH v6 9/9\] gpio: gpio-aspeed-sgpio: Return error if ngpios is not multiple of 8.

- From: Linus Walleij \<hidden\>
- Date: 2021-07-23 10:00:45 
- List: linux-aspeed
- Page: https://ratatoskr.run/linux-aspeed/2021/07/1455759
- Thread: https://ratatoskr.run/linux-gpio/2021/07/1441778/t.md

```text
On Mon, Jul 12, 2021 at 12:04 PM Steven Lee [ref] wrote:

> Add an else-if condition in the probe function to check whether ngpios is
> multiple of 8.
> Per AST datasheet, numbers of available serial GPIO pins in Serial GPIO
> Configuration Register must be n bytes. For instance, if n = 1, it means
> AST SoC supports 8 GPIO pins.
>
> Signed-off-by: Steven Lee <redacted>
> Reviewed-by: Andrew Jeffery <redacted>

Reviewed-by: Linus Walleij <redacted>

Yours,
Linus Walleij
```