On 04/26/2013 02:31 AM, Linus Walleij wrote:
> On Wed, Apr 17, 2013 at 2:41 AM, Javier Martinez Canillas
> <martinez.javier@xxxxxxxxx> wrote:
>
> So:
>
>> +static int omap_gpio_irq_domain_xlate(struct irq_domain *d,
>> + struct device_node *ctrlr,
>> + const u32 *intspec, unsigned int intsize,
>> + irq_hw_number_t *out_hwirq,
>> + unsigned int *out_type)
>> +{
>> + int ret;
>> + struct gpio_bank *bank = d->host_data;
>> + int gpio = bank->chip.base + intspec[0];
>> +
>> + if (WARN_ON(intsize < 2))
>> + return -EINVAL;
>> +
>> + ret = gpio_request_one(gpio, GPIOF_IN, ctrlr->full_name);
>> + if (ret)
>> + return ret;
>
> So how to figure out if a device is already requesting this GPIO
> on some orthogonal axis?
I really don't think that is necessary. Hopefully, my other email [1]
elaborates on why. Let me know if this makes sense.
Cheers
Jon
[1] http://marc.info/?l=linux-arm-kernel&m=136701158117966&w=1
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