# Re: \[RFC 09/11\] tools: gpio: Add new hardware clock type

- From: Dipen Patel \<dipenp@nvidia.com\>
- Date: 2021-07-30 03:08:30 
- List: linux-devicetree
- Page: https://ratatoskr.run/linux-devicetree/2021/07/1462770
- Thread: https://ratatoskr.run/linux-tegra/2021/06/1426429/t.md

```text

On 6/27/21 4:36 AM, Linus Walleij wrote:
> On Sat, Jun 26, 2021 at 1:48 AM Dipen Patel [ref] wrote:
>
>> gpiolib-cdev is extended to support hardware clock type, this
>> patch reflects that fact.
>>
>> Signed-off-by: Dipen Patel <dipenp@nvidia.com>
> (...)
>>                 case 'w':
>>                         config.flags |= GPIO_V2_LINE_FLAG_EVENT_CLOCK_REALTIME;
>>                         break;
>> +               case 't':
>> +                       config.flags |= GPIO_V2_LINE_FLAG_EVENT_CLOCK_HARDWARE;
>> +                       break;
> After the checking of the command line options we need a small sanity
> check so we don't try to enable both realtime and hardware clock
> at the same time, we will only be able to request one of them.

This will any way fail at gpiolib-cdev layer. Do we want to add it here

as well?

>
> Yours,
> Linus Walleij
```