linux-kernel - Re: [PATCH v2 06/10] mfd: tps65910: Use the standard DT property system-power-controller

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Date:	Mon, 27 Oct 2014 17:53:01 +0100
From:	Romain Perier <romain.perier@...il.com>
To:	Johan Hovold <johan@...nel.org>
Cc:	Felipe Balbi <balbi@...com>, Lucas Stach <l.stach@...gutronix.de>,
	Heiko Stübner <heiko@...ech.de>,
	devicetree <devicetree@...r.kernel.org>,
	Mark Brown <broonie@...nel.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Grant Likely <grant.likely@...aro.org>, robh <robh@...nel.org>,
	mark.rutland@....com, linux-pm@...r.kernel.org,
	Guenter Roeck <linux@...ck-us.net>,
	Lee Jones <lee.jones@...aro.org>, robh+dt@...nel.org,
	"pawel.moll" <pawel.moll@....com>,
	"ijc+devicetree" <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Stephen Warren <swarren@...dotorg.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Alexandre Courbot <gnurou@...il.com>,
	linux-arm-kernel@...ts.infradead.org,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>
Subject: Re: [PATCH v2 06/10] mfd: tps65910: Use the standard DT property system-power-controller

Please take a look at "PATCH v1 1/10" of this serie, read it
carefully... it's already handled ^^

2014-10-27 17:43 GMT+01:00 Johan Hovold <johan@...nel.org>:
> On Mon, Oct 27, 2014 at 11:41:53AM -0500, Felipe Balbi wrote:
>> On Mon, Oct 27, 2014 at 05:35:49PM +0100, Lucas Stach wrote:
>> > Am Montag, den 27.10.2014, 16:26 +0000 schrieb Romain Perier:
>> > > No longer use custom property to define poweroff capability, use the standard
>> > > DT property instead.
>> > >
>> > > Signed-off-by: Romain Perier <romain.perier@...il.com>
>> > > ---
>> > >  drivers/mfd/tps65910.c | 3 +--
>> > >  1 file changed, 1 insertion(+), 2 deletions(-)
>> > >
>> > > diff --git a/drivers/mfd/tps65910.c b/drivers/mfd/tps65910.c
>> > > index 7612d89..a7faff2 100644
>> > > --- a/drivers/mfd/tps65910.c
>> > > +++ b/drivers/mfd/tps65910.c
>> > > @@ -423,8 +423,7 @@ static struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
>> > >
>> > >   board_info->irq = client->irq;
>> > >   board_info->irq_base = -1;
>> > > - board_info->pm_off = of_property_read_bool(np,
>> > > -                 "ti,system-power-controller");
>> > > + board_info->pm_off = of_is_system_power_controller();
>> > >
>> > >   return board_info;
>> > >  }
>> > You are breaking compatibility with older DTs here. This is not
>> > acceptable.
>> >
>> > You may change all in-tree DTs to use the new property and also patch
>> > the driver to understand it, but you must make sure that the driver
>> > still understands the old, custom property. And especially in this case
>> > it isn't really hard to do.
>>
>> correct, it should be simple to hide that under
>> of_is_system_power_controller() itself.
>
> Guys, take a look at the code (PATCH 1/10). ;)
>
> Johan
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