linux-kernel - Re: [PATCH] platform/chrome: wilco_ec: Provide correct output format to 'h1

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Message-ID: <CAHcu+Vb37A+b2B6tJDYmJtH2dhUPEDy-3yZxaQYy3P3fLV2nVg@mail.gmail.com>
Date:   Mon, 23 Mar 2020 14:06:26 -0600
From:   Daniel Campello <campello@...gle.com>
To:     Enric Balletbo i Serra <enric.balletbo@...labora.com>
Cc:     Bernardo Perez Priego <bernardo.perez.priego@...el.com>,
        Benson Leung <bleung@...omium.org>,
        Nick Crews <ncrews@...omium.org>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] platform/chrome: wilco_ec: Provide correct output format
 to 'h1_gpio' file

Hello,

On Tue, Mar 17, 2020 at 1:09 AM Enric Balletbo i Serra
<enric.balletbo@...labora.com> wrote:
>
> Hi,
>
> On 14/3/20 0:27, Bernardo Perez Priego wrote:
> > Function 'h1_gpio_get' is receiving 'val' parameter of type u64,
> > this is being passed to 'send_ec_cmd' as type u8, thus, result
> > is stored in least significant byte. Due to output format,
> > the whole 'val' value was being displayed when any of the most
> > significant bytes are different than zero.
> >
> > This fix will make sure only least significant byte is displayed
> > regardless of remaining bytes value.
> >
> > Signed-off-by: Bernardo Perez Priego <bernardo.perez.priego@...el.com>
>
> Daniel, could you give a try and give you Tested-by tag if you're fine with it?
>
> Thanks,
>  Enric
>
> > ---
> >  drivers/platform/chrome/wilco_ec/debugfs.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/platform/chrome/wilco_ec/debugfs.c b/drivers/platform/chrome/wilco_ec/debugfs.c
> > index df5a5f6c3ec6..c775b7d58c6d 100644
> > --- a/drivers/platform/chrome/wilco_ec/debugfs.c
> > +++ b/drivers/platform/chrome/wilco_ec/debugfs.c
> > @@ -211,7 +211,7 @@ static int h1_gpio_get(void *arg, u64 *val)
> >       return send_ec_cmd(arg, SUB_CMD_H1_GPIO, (u8 *)val);
> >  }
> >
> > -DEFINE_DEBUGFS_ATTRIBUTE(fops_h1_gpio, h1_gpio_get, NULL, "0x%02llx\n");
> > +DEFINE_DEBUGFS_ATTRIBUTE(fops_h1_gpio, h1_gpio_get, NULL, "0x%02hhx\n");
> >
> >  /**
> >   * test_event_set() - Sends command to EC to cause an EC test event.
> >

Done. I also found the chromium review for this on crrev.com/c/2090128

Tested-by: Daniel Campello <campello@...omium.org>