From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ondrej Zary Subject: Re: [PATCH 2/4] Add Wolfson Microelectronics WM8766 codec ALSA driver Date: Tue, 17 Apr 2012 18:35:32 +0200 Message-ID: <201204171835.38252.linux@rainbow-software.org> References: <1334611118-10301-1-git-send-email-linux@rainbow-software.org> <1334611118-10301-3-git-send-email-linux@rainbow-software.org> <20120417145929.GA22575@sirena.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail.atlantis.sk (mail-1-out2.atlantis.sk [80.94.52.71]) by alsa0.perex.cz (Postfix) with ESMTP id 7AE42104359 for ; Tue, 17 Apr 2012 18:36:00 +0200 (CEST) In-Reply-To: <20120417145929.GA22575@sirena.org.uk> Content-Disposition: inline List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: alsa-devel-bounces@alsa-project.org Errors-To: alsa-devel-bounces@alsa-project.org To: Mark Brown Cc: alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org List-Id: alsa-devel@alsa-project.org On Tuesday 17 April 2012 16:59:29 Mark Brown wrote: > On Mon, Apr 16, 2012 at 11:18:36PM +0200, Ondrej Zary wrote: > > Needed by Philips PSC724 subdriver. The code does not contain any > > card-specific bits so it can be used by any other ALSA driver. > > > > Signed-off-by: Ondrej Zary > > Please CC me (and ideally all of patches@opensource.wolfsonmicro.com) > on any drivers for Wolfson devices. It's not like we're secretive! > > > --- > > include/sound/wm8766.h | 160 ++++++++++++++++++++ > > sound/i2c/other/Makefile | 3 +- > > sound/i2c/other/wm8766.c | 374 > > ++++++++++++++++++++++++++++++++++++++++++++++ > > No, this should be supported in ASoC - anything adding new code in > sound/i2c is *deeply* suspicious. I agree that sound/i2c is wrong. I worked on tea575x-tuner before which lives in this directory too - but it's neither an I2C device nor a sound chip... There should probably be something like sound/codecs instead that could be used by any sound card drivers. > > +struct snd_wm8766_ops { > > + void (*write)(struct snd_wm8766 *wm, u16 addr, u16 data); > > +}; > > You should in general use regmap rather than open coding register I/O > for I2C devices. regmap seems like an overkill here. It requires the i2c bus to be registered in the kernel i2c subsystem (which is not in the case of ice1712). > > +void snd_wm8766_init(struct snd_wm8766 *wm); > > +void snd_wm8766_set_if(struct snd_wm8766 *wm, u16 dac); > > +void snd_wm8766_set_master_mode(struct snd_wm8766 *wm, u16 mode); > > +void snd_wm8766_set_power(struct snd_wm8766 *wm, u16 power); > > +void snd_wm8766_volume_restore(struct snd_wm8766 *wm); > > +int snd_wm8766_build_controls(struct snd_wm8766 *wm); > > I've not yet looked at the rest of the code but this looks awfully like > you've just invented a minimal version of the ASoC interfaces... The _set functions are just simple register writes - the caller needs to know what to write there (only _set_if is used by psc724). -- Ondrej Zary