[PATCH 9/9] mfd: sec-irq: Do not enforce (incorrect) interrupt trigger type

[Marek Szyprowski]

On 21.12.2020 08:55, Krzysztof Kozlowski wrote:
> On Mon, Dec 21, 2020 at 08:36:02AM +0100, Marek Szyprowski wrote:
>> On 18.12.2020 15:22, Krzysztof Kozlowski wrote:
>>> On Fri, Dec 18, 2020 at 02:25:39PM +0100, Marek Szyprowski wrote:
>>>> On 10.12.2020 22:29, Krzysztof Kozlowski wrote:
>>>>> Interrupt line can be configured on different hardware in different way,
>>>>> even inverted.  Therefore driver should not enforce specific trigger
>>>>> type - edge falling - but instead rely on Devicetree to configure it.
>>>>>
>>>>> The Samsung PMIC drivers are used only on Devicetree boards.
>>>>>
>>>>> Additionally, the PMIC datasheets describe the interrupt line as active
>>>>> low with a requirement of acknowledge from the CPU therefore the edge
>>>>> falling is not correct.
>>>>>
>>>>> Signed-off-by: Krzysztof Kozlowski <krzk at kernel.org>
>>>> Tested-by: Marek Szyprowski <m.szyprowski at samsung.com>
>>>>
>>>> It looks that this together with DTS change fixes RTC alarm failure that
>>>> I've observed from time to time on TM2e board!
>>> Great! I'll add this to the commit msg.
>>>
>>> Thanks for testing.
>> BTW, while playing with this, maybe it would make sense to fix the
>> reported interrupt type for the PMIC sub-interrupts:
>>
>> # grep s2mps /proc/interrupts
>> 120:          0      gpa0   7 Level     s2mps13
>> 121:          0   s2mps13  10 Edge      rtc-alarm0
> I also spotted this. It's a virtual interrupt and I am not sure whether
> we can actually configure it when the hardware does not allow to set the
> type (the regmap_irq_type requires register offsets).

I know that it is virtual, but maybe the regmap code could simply copy 
the interrupt type from its parent interrupt?

Best regards

-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland