linux-kernel - Re: [RESEND PATCH 1/2] MFD: MAX77693: add MAX77693 MFD driver

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Message-ID: <CAH9JG2VrNCPMHoy5pUyc7nTzv-B7ucXheMy7PBtVUfaebt=yUA@mail.gmail.com>
Date:	Tue, 13 Mar 2012 14:39:23 +0900
From:	Kyungmin Park <kyungmin.park@...sung.com>
To:	Venu Byravarasu <vbyravarasu@...dia.com>
Cc:	Chanwoo Choi <cw00.choi@...sung.com>,
	"sameo@...ux.intel.com" <sameo@...ux.intel.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"myungjoo.ham@...sung.com" <myungjoo.ham@...sung.com>
Subject: Re: [RESEND PATCH 1/2] MFD: MAX77693: add MAX77693 MFD driver

Hi,

It's discussed previous time. It's PMIC and very sensitive to system.
So we decide to use legacy way. As regmap is not yet tested. So we
summit the current way and revise it later.

Thank you,
Kyungmin Park

On 3/13/12, Venu Byravarasu <vbyravarasu@...dia.com> wrote:
> Why don't you make use of regmap for all i2c read/ write operations?
>
>> +int max77693_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)
>> +{
>> +	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
>> +	int ret;
>> +
>> +	mutex_lock(&max77693->iolock);
>> +	ret = i2c_smbus_read_byte_data(i2c, reg);
>> +	mutex_unlock(&max77693->iolock);
>> +	if (ret < 0)
>> +		return ret;
>> +
>> +	ret &= 0xff;
>> +	*dest = ret;
>> +	return 0;
>> +}
>> +EXPORT_SYMBOL_GPL(max77693_read_reg);
>> +
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