[PATCH 1/5] powerpc/qe: Implement QE Pin Multiplexing API

[Anton Vorontsov]

On Wed, Dec 17, 2008 at 10:46:17AM -0600, Kumar Gala wrote:
>
> On Dec 17, 2008, at 9:41 AM, Anton Vorontsov wrote:
>
>> On Wed, Dec 03, 2008 at 10:27:38PM +0300, Anton Vorontsov wrote:
>>> With this API we're able to set a QE pin to the GPIO mode or a  
>>> dedicated
>>> peripheral function.
>>>
>>> The API relies on the fact that QE gpio controllers are registered.  
>>> If
>>> they aren't, the API won't work (gracefully though).
>>>
>>> There is one caveat though: if anybody occupied the node->data  
>>> before us,
>>> or overwrote it, then bad things will happen. Luckily this is all in 
>>> the
>>> platform code that we fully control, so this should never happen.
>>>
>>> I could implement more checks (for example we could create a list of
>>> successfully registered QE controllers, and compare the node->data  
>>> in the
>>> qe_pin_request()), but this is unneeded if nobody is going to do  
>>> silly
>>> things behind our back.
>>>
>>> Signed-off-by: Anton Vorontsov <avorontsov at ru.mvista.com>
>>> ---
>>
>> Kumar, can you please merge this patch? It is the last patch that
>> holds the FHCI USB driver.
>>
>> Thanks,
>
> Will do.  Can I get you to add kdoc comments for the API functions:

The functions already have kdoc comments (see qe_lib/gpio.c changes).

> +extern struct qe_pin *qe_pin_request(struct device_node *np, int  
> index);
> +extern void qe_pin_free(struct qe_pin *qe_pin);
> +extern void qe_pin_set_gpio(struct qe_pin *qe_pin);
> +extern void qe_pin_set_dedicated(struct qe_pin *pin);

-- 
Anton Vorontsov
email: cbouatmailru at gmail.com
irc://irc.freenode.net/bd2