[PATCH v3] ARM: at91: pit add DT support
Nicolas Ferre
nicolas.ferre at atmel.com
Fri Jan 6 08:36:42 EST 2012
On 01/05/2012 05:42 PM, Rob Herring :
> On 01/05/2012 11:25 AM, 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>
>> ---
>> v3: - use irq_of_parse_and_map() for handling irq numbers specified by DT.
>> Correction proposed by Jamie Iles.
>>
>> v2: - new specification of irq numbers in DT (due to modification of AIC code)
>> - new error path in of_at91sam926x_pit_init()
>> - fall back to built-in values if an error occurs
>> - use of of_property_read_u32() to get irq property
>>
>> .../devicetree/bindings/arm/atmel-at91.txt | 8 +++
>> arch/arm/boot/dts/at91sam9g20.dtsi | 5 ++
>> arch/arm/boot/dts/at91sam9g45.dtsi | 6 ++
>> arch/arm/mach-at91/at91sam926x_time.c | 53 +++++++++++++++++++-
>> 4 files changed, 70 insertions(+), 2 deletions(-)
>> create mode 100644 Documentation/devicetree/bindings/arm/atmel-at91.txt
[..]
>> --- a/arch/arm/mach-at91/at91sam926x_time.c
>> +++ b/arch/arm/mach-at91/at91sam926x_time.c
[..]
>> void __init at91sam926x_ioremap_pit(u32 addr)
>> {
>> + if (!of_at91sam926x_pit_init())
>> + return;
>
> This seems backwards to me. I don't have the ioremap changes in my tree,
> but shouldn't the caller of at91sam926x_ioremap_pit be changed to
> something like this:
>
> if (of_at91sam926x_pit_init() < 0)
> at91sam926x_ioremap_pit(addr);
Yes, you are right, it will be more readable the other way around.
I repost another revision now.
> Otherwise,
> Acked-by: Rob Herring <rob.herring at calxeda.com>
Thanks for your review.
Best regards,
--
Nicolas Ferre
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