linux-kernel - Re: [PATCH v6 2/5] MFD: RK808: Add new mfd driver for RK808

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Date:	Wed, 27 Aug 2014 08:56:35 -0700
From:	Doug Anderson <dianders@...omium.org>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	Chris Zhong <zyw@...k-chips.com>, Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	"broonie@...nel.org" <broonie@...nel.org>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	Mike Turquette <mturquette@...aro.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	rtc-linux@...glegroups.com, Grant Likely <grant.likely@...aro.org>,
	Lin Huang <hl@...k-chips.com>,
	Tao Huang <huangtao@...k-chips.com>,
	Eddie Cai <cf@...k-chips.com>,
	zhangqing <zhangqing@...k-chips.com>, xxx <xxx@...k-chips.com>,
	Heiko Stübner <heiko@...ech.de>,
	Olof Johansson <olof@...om.net>,
	Sonny Rao <sonnyrao@...omium.org>,
	Dmitry Torokhov <dtor@...omium.org>,
	Javier Martinez Canillas <javier.martinez@...labora.co.uk>,
	Kever Yang <kever.yang@...k-chips.com>
Subject: Re: [PATCH v6 2/5] MFD: RK808: Add new mfd driver for RK808

Lee,

On Wed, Aug 27, 2014 at 6:39 AM, Lee Jones <lee.jones@...aro.org> wrote:
>> +static int rk808_probe(struct i2c_client *client,
>> +                    const struct i2c_device_id *id)
>> +{
>> +     int ret;
>> +     int pm_off = 0;
>> +     struct rk808 *rk808;
>> +     struct device_node *np = client->dev.of_node;
>
> Are you prepared for np == NULL?

Given that the driver no longer supports getting its config from
platform data, I think it simply depends on OF now.  It seems like we
could add a "&& OF" to the dependencies.  Is that OK with you?

It doesn't hurt to still add a check for np == NULL and bail out, though.
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