linux-kernel - Re: [RESEND PATCH v2 1/2] MFD: MAX77693: add MAX77693 MFD driver

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Message-ID: <CAH9JG2Wr25BVNudAQaQ8GaN9mMV90iVcioAaomdBtORD_d3w+g@mail.gmail.com>
Date:	Fri, 11 May 2012 23:28:41 +0900
From:	Kyungmin Park <kmpark@...radead.org>
To:	Samuel Ortiz <sameo@...ux.intel.com>
Cc:	Chanwoo Choi <cw00.choi@...sung.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"myungjoo.ham@...sung.com" <myungjoo.ham@...sung.com>
Subject: Re: [RESEND PATCH v2 1/2] MFD: MAX77693: add MAX77693 MFD driver

On Fri, May 11, 2012 at 11:25 PM, Kyungmin Park <kmpark@...radead.org> wrote:
> Hi Samuel,
>
> On Fri, May 11, 2012 at 11:15 PM, Samuel Ortiz <sameo@...ux.intel.com> wrote:
>> Hi Choi,
>>
>> On Tue, Mar 20, 2012 at 10:07:58AM +0900, Chanwoo Choi wrote:
>>> @@ -0,0 +1,224 @@
>>> +/*
>>> + * max77693.c - mfd core driver for the MAX 77693
>>> + *
>>> + * Copyright (C) 2011 Samsung Electronics
>> 2012 ?
>>
>>> +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);
>> You don't need this locking as the i2c layer will do it for you.
>> Also, this definitely look like a good candidate for a regmap API conversion,
>> I'd appreciate if you could work on that.
>
> Right, it's already done. you can find the updated patches in your mail box.
>
> [PATCH v2 0/3] mfd: MAX77686: Add initial support for MAXIM 77686 mfd chip
>
> This patchset adds suppport for MAX77686 which is a multifunction
> device including
> regulator and rtc. It also contains drivers supporting rtc and regulator.
> All drivers ard based on MAX8997 dirvers and use regmap to access to
> the inner registers.
> To manage IRQs occuered by max77686, it supports IRQ domain.
>
Sorry, I'm confused. it's another PMIC IC. I'll check the max77693 also. :);
> Thank you,
> Kyungmin Park
>>
>>> +static struct i2c_driver max77693_i2c_driver = {
>>> +     .driver = {
>>> +                .name = "max77693",
>>> +                .owner = THIS_MODULE,
>>> +     },
>>> +     .probe = max77693_i2c_probe,
>>> +     .remove = max77693_i2c_remove,
>>> +     .id_table = max77693_i2c_id,
>>> +};
>>> +
>>> +static int __init max77693_i2c_init(void)
>>> +{
>>> +     return i2c_add_driver(&max77693_i2c_driver);
>>> +}
>>> +/* init early so consumer devices can complete system boot */
>>> +subsys_initcall(max77693_i2c_init);
>>> +
>>> +static void __exit max77693_i2c_exit(void)
>>> +{
>>> +     i2c_del_driver(&max77693_i2c_driver);
>>> +}
>>> +module_exit(max77693_i2c_exit);
>> You could use module_i2c_driver() here.
>>
>> Cheers,
>> Samuel.
>>
>> --
>> Intel Open Source Technology Centre
>> http://oss.intel.com/
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