linux-kernel - Re: [PATCH 1/1] [Blackfin] char driver for Blackfin on-chip OTP memory

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Message-ID: <47A076EB.9020401@gmail.com>
Date:	Wed, 30 Jan 2008 14:08:59 +0100
From:	Jiri Slaby <jirislaby@...il.com>
To:	Robin Getz <rgetz@...ckfin.uclinux.org>
CC:	Bryan Wu <bryan.wu@...log.com>, linux-kernel@...r.kernel.org,
	Mike Frysinger <michael.frysinger@...log.com>
Subject: Re: [PATCH 1/1] [Blackfin] char driver for Blackfin on-chip OTP memory

On 01/30/2008 01:39 PM, Robin Getz wrote:
> On Wed 30 Jan 2008 06:00, Jiri Slaby pondered:
>> On 01/30/2008 11:36 AM, Bryan Wu wrote:
>>> From: Mike Frysinger <michael.frysinger@...log.com>
>>>
>>> initial char driver for otp memory
>>> (only read supported atm ... needs real examples/docs for write support)
>>>
>>> Signed-off-by: Mike Frysinger <michael.frysinger@...log.com>
>>> Signed-off-by: Bryan Wu <bryan.wu@...log.com>
> 
>>> +	bfin_otp_class = class_create(THIS_MODULE, "otp");
>>> +	device_create(bfin_otp_class, NULL, bfin_otp_dev_node, "otp");
>> Anyway, wouldn't be easier/better to use misc.c functionality here 
>> (misc_register() et al.)?
> 
> OTP (one time programmable) memory are not registers, they are small blocks 
> (8k bytes) of non violate on chip memory, for storing things that you don't 
> want other people to look at via a PCB level probe. (like keys), or things 
> that are just helpful - like MAC addresses.

Sorry, misc_register() allows you to get rid of the chrdev initialization 
including class creation. Maybe I'm not understanding what you are trying to 
explain me?
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