Re: UCB1400: Passing IRQ through platform_data

[Graham Gower <graham.gower@gmail.com>]

Marek Vasut wrote:
> Dne Po 22. března 2010 07:03:29 Graham Gower napsal(a):
>> Hi Marek,
>> I wish to use the ucb1400_ts driver on my device. But I'm having trouble
>> passing the platform_data to the ucb1400_core driver.
>>
>> I couldn't see any in tree examples of this being done and my attempts to
>> do this via registering a platform_driver for ucb1400_core have failed
>> (probably since this driver is ac97_bus_type, not a platform_driver).
>>
>> Can you provide me with info regarding the correct method for passing the
>> irq to the driver?
>>
>> Thanks,
>> -Graham
>>
> 
> static struct ucb1400_pdata pdata = {
> 	.irq	= IRQ_GPIO(123),
> };
> 
> static struct platform_device ucb1400_core = {
>         .name   = "ucb1400_core",
>         .id     = -1,
> 	.dev	= {
> 		.platform_data = &pdata,
> 	},
> };
> 
> init() {
> 	platform_device_register(&ucb1400_core);
> }
> 
> Like this ?

That is the first thing I tried and it doesn't work. I suggest you printk
the pdata in the ucb1400_core driver after having done this to confirm (I got
NULL). You don't need to register a platform driver for ucb1400_core_probe()
to be called anyway - presumably its enumerated from the ac97 bus.

> 
> btw. you don't have to pass pdata at all ... the logic for auto-detecting IRQ is 
> still there and is active if no pdata are supplied.

This does not work for me. I have not yet investigated why.

-Graham

PS: I am on mips, not arm. Arm CC removed.
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