Re: [PATCH RFC 5/5] ARM: dts: vf-colibri-eval: use IRQ_TYPE_* to specify irq flags

[Stefan Agner <stefan-XLVq0VzYD2Y@public.gmane.org>]

On 2017-06-03 20:49, Shawn Guo wrote:
> On Fri, May 26, 2017 at 08:06:09PM +0200, Uwe Kleine-König wrote:
>> According to the binding documentation and the source code the
>> vf610-gpio controller takes IRQ_TYPE_* as its flags values, not
>> GPIO_ACTIVE_*.
>>
>> This patch uses the right variable type which yields the same result
>> when compiled. Note that this might be wrong and actually
>> IRQ_TYPE_LEVEL_LOW is intended by the dt author.
>>
>> Signed-off-by: Uwe Kleine-König <uwe-rXY34ruvC2xidJT2blvkqNi2O/JbrIOy@public.gmane.org>
>> ---
>> Hello,
>>
>> can somebody with the hardware or it's documentation please check which
>> flag is the right one?
> 
> @Stefan, can you help to confirm?
> 

Thanks for spotting! According to the data sheet it is a low active
signal, so I guess IRQ_TYPE_LEVEL_LOW is correct. But the driver
actually explicitly requests IRQF_TRIGGER_FALLING, that has been the
case since its inception. IMHO LEVEL_LOW should be more rigid since it
helps for missed interrupt edges...

--
Stefan

>>
>> Best regards
>> Uwe
>>
>>  arch/arm/boot/dts/vf-colibri-eval-v3.dtsi | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/arch/arm/boot/dts/vf-colibri-eval-v3.dtsi b/arch/arm/boot/dts/vf-colibri-eval-v3.dtsi
>> index 091b738041a0..3e0c84d79c43 100644
>> --- a/arch/arm/boot/dts/vf-colibri-eval-v3.dtsi
>> +++ b/arch/arm/boot/dts/vf-colibri-eval-v3.dtsi
>> @@ -117,7 +117,7 @@
>>  		clocks = <&clk16m>;
>>  		spi-max-frequency = <10000000>;
>>  		interrupt-parent = <&gpio1>;
>> -		interrupts = <11 GPIO_ACTIVE_LOW>;
>> +		interrupts = <11 IRQ_TYPE_EDGE_RISING>;
>>  	};
>>  };
>>
>> --
>> 2.11.0
>>
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