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

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Date:	Tue, 13 Mar 2012 11:05:01 +0530
From:	Venu Byravarasu <vbyravarasu@...dia.com>
To:	Chanwoo Choi <cw00.choi@...sung.com>,
	"sameo@...ux.intel.com" <sameo@...ux.intel.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"myungjoo.ham@...sung.com" <myungjoo.ham@...sung.com>,
	"kyungmin.park@...sung.com" <kyungmin.park@...sung.com>
Subject: RE: [RESEND PATCH 1/2] MFD: MAX77693: add MAX77693 MFD driver

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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