linux-kernel - Re: [PWM PATCH 1/5] API to consolidate PWM devices behind a common user and kernel interface

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Message-ID: <4B6B0450.4000507@billgatliff.com>
Date:	Thu, 04 Feb 2010 11:30:56 -0600
From:	Bill Gatliff <bgat@...lgatliff.com>
To:	H Hartley Sweeten <hartleys@...ionengravers.com>
CC:	linux-embedded@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PWM PATCH 1/5] API to consolidate PWM devices behind a common
 user and kernel interface

Bill Gatliff wrote:
> H Hartley Sweeten wrote:
>   
>> Your older patch just used printk's to output the messages.  I think the
>> Oops is being caused by the dev_<level>(pwm->dev, ...).  Where is pwm->dev
>> being setup?
>>   
>>     
>
> The intention was to save the result from device_create() called from
> __pwm_create_sysfs(), but I'm suspicious that the patch I posted doesn't
> have that code for some reason.  My local git repo here doesn't seem to
> have it.  Hmmm...
>   

No, that's not right.  Disregard the above.

If the PWM device in question is already known to the kernel, then
before you call pwm_register() you must set pwm->dev to the address of
that device structure.  I need to come up with a better way to handle this.

If the PWM device isn't already known to the kernel as a true struct
device, then I don't yet have a Plan B.  Drat.  :(


b.g.

-- 
Bill Gatliff
bgat@...lgatliff.com


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