linux-kernel - Re: [PATCH 1/1] : hwmon - new chip driver for TI ADS7828 A-D

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Date:	Tue, 18 Dec 2007 20:56:44 +0000
From:	Steve Hardy <steve@...uxrealtime.co.uk>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	lm-sensors@...sensors.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] : hwmon - new chip driver for TI ADS7828 A-D

Andrew,

Thanks your your comments, I'm currently preparing/testing a revised patch based on your suggestions, which I will post later this week.

A couple of comments inline.

Steve

> I wouldn't bother with EXPERIMENTAL personally.  It seems a farily
> pointless thing.
> 

OK, I copied one of the other hwmon drivers, many of which are marked experimental.

>> +static int ads7828_attach_adapter(struct i2c_adapter *adapter);
>> +static int ads7828_detect(struct i2c_adapter *adapter, int address, int 
>> kind);
>> +static void ads7828_init_client(struct i2c_client *client);
>> +static int ads7828_detach_client(struct i2c_client *client);
>> +static struct ads7828_data *ads7828_update_device(struct device *dev);
>> +static u16 ads7828_read_value(struct i2c_client *client, u8 reg);
> 
> I do dislike all these forward declarations, but they're all needed here
> give the order of the functions.  Maybe from my Pascal-on-pdp11 days..
> 

OK, this is due to re-using the driver structure/style of other hwmon drivers, will try to improve.

>> +static int ads7828_attach_adapter(struct i2c_adapter *adapter)
>> +{
>> +    if (!(adapter->class & I2C_CLASS_HWMON))
>> +        return 0;
> 
> Can this happen?

Hmmm, this code exists in pretty much all of the other hwmon drivers, so I will leave it in.

I think it relates to I2C vs ISA connected devices, to avoid detecting something with the correct ID on the wrong bus?

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