linux-kernel - Re: [RFC 09/11] tools: gpio: Add new hardware clock type

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Date:   Thu, 29 Jul 2021 20:17:22 -0700
From:   Dipen Patel <dipenp@...dia.com>
To:     Linus Walleij <linus.walleij@...aro.org>
CC:     "thierry.reding@...il.com" <thierry.reding@...il.com>,
        Jon Hunter <jonathanh@...dia.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-tegra <linux-tegra@...r.kernel.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Kent Gibson <warthog618@...il.com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux Doc Mailing List <linux-doc@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>
Subject: Re: [RFC 09/11] tools: gpio: Add new hardware clock type


On 6/27/21 4:36 AM, Linus Walleij wrote:
> On Sat, Jun 26, 2021 at 1:48 AM Dipen Patel <dipenp@...dia.com> wrote:
>
>> gpiolib-cdev is extended to support hardware clock type, this
>> patch reflects that fact.
>>
>> Signed-off-by: Dipen Patel <dipenp@...dia.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