linux-kernel - Re: [PATCH] ASoC: max98090: add shutdown callback for max98090

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Message-ID: <5524FFC0.4070900@rock-chips.com>
Date:	Wed, 08 Apr 2015 18:15:28 +0800
From:	Caesar Wang <wxt@...k-chips.com>
To:	Mark Brown <broonie@...nel.org>
CC:	Sonny Rao <sonnyrao@...omium.org>,
	Cheng-Yi Chiang <cychiang@...omium.org>,
	Heiko Stuebner <heiko@...ech.de>,
	zhengxing <zhengxing@...k-chips.com>,
	"jay.xu" <xjq@...k-chips.com>, linux-rockchip@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org,
	dri-devel@...ts.freedesktop.org, Jaroslav Kysela <perex@...ex.cz>,
	alsa-devel@...a-project.org, Takashi Iwai <tiwai@...e.de>,
	linux-kernel@...r.kernel.org, Dylan Reid <dgreid@...omium.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
	Tushar Behera <tushar.b@...sung.com>
Subject: Re: [PATCH] ASoC: max98090: add shutdown callback for max98090

Mark,


在 2015年04月08日 17:50, Mark Brown 写道:
> On Wed, Apr 08, 2015 at 04:52:08PM +0800, Caesar Wang wrote:
>
>> +static void max98090_i2c_shutdown(struct i2c_client *i2c)
>> +{
>> +	struct max98090_priv *max98090 = dev_get_drvdata(&i2c->dev);
>> +
>> +	dev_info(&i2c->dev, "shut down device\n");
> Remove this, it's adding noise.

Done
>> +
>> +	/* Enable volume smoothing, disable zero cross.  This will cause
>> +	 * a quick 40ms ramp to mute on shutdown.
>> +	 */
>> +	regmap_write(max98090->regmap,
>> +		M98090_REG_LEVEL_CONTROL, M98090_VSENN_MASK);
>> +	regmap_write(max98090->regmap,
>> +		M98090_REG_DEVICE_SHUTDOWN, 0x00);
>> +	msleep(40);
>> +}
> This is OK but equivalent code should be being added to the driver
> remove path as the same thing should be happening there.
Yeah.I will fix it in v2 patch.

Thanks!

-- 
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王晓腾    Caesar Wang
系统产品三部   Product R&D Dept.III
福州瑞芯微电子有限公司 Fuzhou Rockchip Electronics Co.Ltd
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