linux-kernel - Re: [PATCH v2] hwmon: corsair-psu: fix suspend behavior

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Date:   Fri, 4 Jun 2021 04:05:14 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Wilken Gottwalt <wilken.gottwalt@...teo.net>
Cc:     linux-kernel@...r.kernel.org, Jean Delvare <jdelvare@...e.com>,
        Jonathan Corbet <corbet@....net>, linux-hwmon@...r.kernel.org
Subject: Re: [PATCH v2] hwmon: corsair-psu: fix suspend behavior

On Fri, Jun 04, 2021 at 05:17:11AM +0000, Wilken Gottwalt wrote:
> On Thu, 3 Jun 2021 09:05:33 -0700
> Guenter Roeck <linux@...ck-us.net> wrote:
> 
> > On Thu, Jun 03, 2021 at 11:51:02AM +0000, Wilken Gottwalt wrote:
> > > During standby some PSUs turn off the microcontroller. A re-init is
> > > required during resume or the microcontroller stays unresponsive.
> > > 
> > > Fixes: d115b51e0e56 ("hwmon: add Corsair PSU HID controller driver")
> > > Signed-off-by: Wilken Gottwalt <wilken.gottwalt@...teo.net>
> > 
> > Applied.
> 
> Thank you. Though I have an odd question. I would like to change the licensing to
> a dual license (GPL/MPL) to support the LibreHardwareMonitor project. They want
> to use my code but use a MPL license. What would be the best way to do this?

Submit a patch which would need an Acked-by: from everyone who contributed
to the driver. As far as I can see, that would be Wan Jiabing
<wanjiabing@...o.com>, Jack Doan <me@...kdoan.com>, and Colin Ian King
<colin.king@...onical.com>. I would suggest to ask them first if the license
change is ok with them.

Guenter

> 
> greetings,
> Will
> 
> > Thanks,
> > Guenter
> > 
> > > ---
> > > Changes in v2:
> > >   - corrected fixes commit
> > > ---
> > >  drivers/hwmon/corsair-psu.c | 14 ++++++++++++++
> > >  1 file changed, 14 insertions(+)
> > > 
> > > diff --git a/drivers/hwmon/corsair-psu.c b/drivers/hwmon/corsair-psu.c
> > > index 02298b86b57b..731d5117f9f1 100644
> > > --- a/drivers/hwmon/corsair-psu.c
> > > +++ b/drivers/hwmon/corsair-psu.c
> > > @@ -771,6 +771,16 @@ static int corsairpsu_raw_event(struct hid_device *hdev, struct hid_report
> > > *repo return 0;
> > >  }
> > >  
> > > +#ifdef CONFIG_PM
> > > +static int corsairpsu_resume(struct hid_device *hdev)
> > > +{
> > > +	struct corsairpsu_data *priv = hid_get_drvdata(hdev);
> > > +
> > > +	/* some PSUs turn off the microcontroller during standby, so a reinit is required */
> > > +	return corsairpsu_init(priv);
> > > +}
> > > +#endif
> > > +
> > >  static const struct hid_device_id corsairpsu_idtable[] = {
> > >  	{ HID_USB_DEVICE(0x1b1c, 0x1c03) }, /* Corsair HX550i */
> > >  	{ HID_USB_DEVICE(0x1b1c, 0x1c04) }, /* Corsair HX650i */
> > > @@ -793,6 +803,10 @@ static struct hid_driver corsairpsu_driver = {
> > >  	.probe		= corsairpsu_probe,
> > >  	.remove		= corsairpsu_remove,
> > >  	.raw_event	= corsairpsu_raw_event,
> > > +#ifdef CONFIG_PM
> > > +	.resume		= corsairpsu_resume,
> > > +	.reset_resume	= corsairpsu_resume,
> > > +#endif
> > >  };
> > >  module_hid_driver(corsairpsu_driver);
> > >  
>