linux-kernel - Re: [PATCH v2] mfd: MAX6650/6651 support

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Message-ID: <CAK9yfHwxmtEXQwPZJfU980G6g7sbrLDU=nZiN=dkwVwvg7UXyA@mail.gmail.com>
Date:	Mon, 10 Feb 2014 20:52:55 +0530
From:	Sachin Kamat <sachin.kamat@...aro.org>
To:	Laszlo Papp <lpapp@....org>, LKML <linux-kernel@...r.kernel.org>,
	Lee Jones <lee.jones@...aro.org>
Subject: Re: [PATCH v2] mfd: MAX6650/6651 support

On 10 February 2014 18:48, Laszlo Papp <lpapp@....org> wrote:
> On Mon, Feb 10, 2014 at 12:02 PM, Sachin Kamat <sachin.kamat@...aro.org> wrote:
>> Hi Laszlo,
>>
>> If you are considering re-spinning this patch based on Lee's comments, please
>> also consider my comments inline.
>
> Hi, sure, thanks.
>
>> On 8 February 2014 17:03, Laszlo Papp <lpapp@....org> wrote:
>>> MAX6650/MAX6651 chip is a multi-function device with I2C busses. The
>>> chip includes fan-speed regulators and monitors, GPIO, and alarm.
>>>
>>> This patch is an initial release of a MAX6650/6651 MFD driver that
>>> supports to enable the chip with its primary I2C bus that will connect
>>> the hwmon, and then the gpio devices for now.
>>>
>>> Signed-off-by: Laszlo Papp <lpapp@....org>
>>> ---
>>>  drivers/mfd/Kconfig                 | 11 +++++
>>>  drivers/mfd/Makefile                |  1 +
>>>  drivers/mfd/max665x.c               | 88 +++++++++++++++++++++++++++++++++++++
>>>  include/linux/mfd/max665x-private.h | 42 ++++++++++++++++++
>>>  4 files changed, 142 insertions(+)
>>>  create mode 100644 drivers/mfd/max665x.c
>>>  create mode 100644 include/linux/mfd/max665x-private.h
>>>
>>> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
>>> index 49bb445..e25be62 100644
>>> --- a/drivers/mfd/Kconfig
>>> +++ b/drivers/mfd/Kconfig
>>> @@ -368,6 +368,17 @@ config MFD_MAX8907
>>>           accessing the device; additional drivers must be enabled in order
>>>           to use the functionality of the device.
>>>
>>> +config MFD_MAX665X
>>> +       bool "Maxim Semiconductor MAX6650/MAX6651 Support"
>>> +       select MFD_CORE
>>> +       depends on I2C
>>> +       select REGMAP_I2C
>>
>> Move the "depends on" before the select MFD_CORE.
>
> OK.
>
>>> +       help
>>> +         Say yes here to support for Maxim Semiconductor MAX6650/MAX6651.
>>
>>  s/here to support/here to add support
>
> OK.
>
>>>This is
>>> +         a fan speed regulator and monitor IC. This driver provies common support
>>> +         for accessing the device, additional drivers must be enabled in order to
>>> +         use the functionality of the device.
>>> +
>>>  config MFD_MAX8925
>>>         bool "Maxim Semiconductor MAX8925 PMIC Support"
>>>         depends on I2C=y
>>> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
>>> index 5aea5ef..63668c5 100644
>>> --- a/drivers/mfd/Makefile
>>> +++ b/drivers/mfd/Makefile
>>> @@ -111,6 +111,7 @@ obj-$(CONFIG_MFD_DA9055)    += da9055.o
>>>  da9063-objs                    := da9063-core.o da9063-irq.o da9063-i2c.o
>>>  obj-$(CONFIG_MFD_DA9063)       += da9063.o
>>>
>>> +obj-$(CONFIG_MFD_MAX665X)      += max665x.o
>>>  obj-$(CONFIG_MFD_MAX14577)     += max14577.o
>>>  obj-$(CONFIG_MFD_MAX77686)     += max77686.o max77686-irq.o
>>>  obj-$(CONFIG_MFD_MAX77693)     += max77693.o max77693-irq.o
>>> diff --git a/drivers/mfd/max665x.c b/drivers/mfd/max665x.c
>>> new file mode 100644
>>> index 0000000..395373fe
>>> --- /dev/null
>>> +++ b/drivers/mfd/max665x.c
>>> @@ -0,0 +1,88 @@
>>> +/*
>>> + * Device access for MAX6650-MAX6651
>>> + *
>>> + * Copyright(c) 2013 Polatis Ltd.
>>> + *
>>> + * Author: Laszlo Papp <laszlo.papp@...atis.com>
>>> + *
>>> + *  This program is free software; you can redistribute  it and/or modify it
>>> + *  under  the terms of  the GNU General  Public License as published by the
>>> + *  Free Software Foundation;  either version 2 of the  License, or (at your
>>> + *  option) any later version.
>>> + */
>>> +
>>> +#include <linux/device.h>
>>> +#include <linux/mfd/core.h>
>>> +#include <linux/module.h>
>>> +#include <linux/i2c.h>
>>
>> Please arrange these alphabetically.
>
> OK, it does not matter for me. Please agree upon something with Lee. :-)
>
>>
>> [snip]
>>> +
>>> +struct max665x_dev {
>>> +       struct device *dev;
>>> +       struct mutex iolock;
>>> +
>>> +       struct i2c_client *i2c;
>>> +       struct regmap     *map;
>>> +
>>> +       int type;
>>
>> Unnecessary extra lines above could be removed.
>
> I prefer it that way, but I will remove the two extra lines as you wish.

As I already said, these are just nits and only since you were
re-spinning the patch,
I suggested them. Also, since this is a new file being added, it
avoids further patches
doing these same things.

-- 
With warm regards,
Sachin
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