[PATCH v2] ARM: at91: pit add DT support
Nicolas Ferre
nicolas.ferre at atmel.com
Fri Jan 6 01:50:09 EST 2012
On 01/05/2012 01:00 PM, Jamie Iles :
> Hi Nicolas, Jean-Christophe,
>
> On Thu, Jan 05, 2012 at 02:48:28PM +0100, Nicolas Ferre wrote:
>> From: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
>>
>> Retreive registers address and IRQ from device tree entry. Fall back
>> to built-in values if an error occurs.
>>
>> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
>> [nicolas.ferre at atmel.com: change error path and interrupts property handling]
>> Signed-off-by: Nicolas Ferre <nicolas.ferre at atmel.com>
>> ---
> [...]
>> diff --git a/arch/arm/mach-at91/at91sam926x_time.c
>> b/arch/arm/mach-at91/at91sam926x_time.c
>> index d89ead7..5d4c308 100644
>> --- a/arch/arm/mach-at91/at91sam926x_time.c
>> +++ b/arch/arm/mach-at91/at91sam926x_time.c
>> @@ -14,6 +14,8 @@
> [...]
>> +static int __init of_at91sam926x_pit_init(void)
>> +{
>> + struct device_node *np;
>> +
>> + np = of_find_matching_node(NULL, timer_ids);
>> + if (!np)
>> + goto err;
>> +
>> + pit_base_addr = of_iomap(np, 0);
>> + if (!pit_base_addr)
>> + goto node_err;
>> +
>> + /* Get the interrupts property */
>> + if (of_property_read_u32(np, "interrupts", &at91sam926x_pit_irq.irq))
>> + goto ioremap_err;
>
> I think you want:
>
> at91sam926x_pit_irq.irq = irq_of_parse_and_map(np, 0);
>
> to make sure the IRQ is converted to a Linux IRQ and not a hwirq.
Yes, that definitively makes sense. BTW, without a DT entry, how should
I map a hwirq, with the irq_domain_to_irq() helper? But I will need
access to the interrupt controller "struct irq_domain"...
> Other than that looks fine to me.
Thanks a lot for your review, Jamie.
Best regards,
--
Nicolas Ferre
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