From: Marc Zyngier <maz@kernel.org>
To: Alexandre Torgue <alexandre.torgue@st.com>
Cc: "Marek Vasut" <marex@denx.de>,
"Patrick Delaunay" <patrick.delaunay@st.com>,
"Maxime Coquelin" <mcoquelin.stm32@gmail.com>,
"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
linux-stm32@st-md-mailman.stormreply.com,
"Linux ARM" <linux-arm-kernel@lists.infradead.org>
Subject: Re: STM32MP1 level triggered interrupts
Date: Fri, 24 Jan 2020 09:24:53 +0000 [thread overview]
Message-ID: <7e0ce712f7e34b38c8f541644026c52e@kernel.org> (raw)
In-Reply-To: <f9d98afc-6cb8-ef7b-cff7-a04e14dba4c8@st.com>
On 2020-01-24 09:17, Alexandre Torgue wrote:
> On 1/23/20 11:21 PM, Marek Vasut wrote:
[...]
>> But I still wonder, what is the purpose of the EXTImux in that SoC?
>> Shouldn't that permit routing GPIOs directly into GIC SPIs, which
>> would
>> then permit detecting at least level-high interrupts ?
>>
>
> For this SoC, EXTI block detects external line edges and rises a GIC
> SPI interrupt. This EXTi block is mainly used to handle HW events like
> buttons, clocks ... So first issue seems more to be a design issue
> (your design doesn't fit with MP1 datasheet).
>
> Now, let's find a solution. I'll have a look on your proposition:
> "check the line in EOI callback and retrig".
>
> Marc, this kind a solution could be acceptable on your side ?
It will depend on the nature of the hack you will have to put in there.
If it is 100% reliable, why not? Anything short of that, probably not.
M.
--
Jazz is not dead. It just smells funny...
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next prev parent reply other threads:[~2020-01-24 9:24 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-20 18:32 STM32MP1 level triggered interrupts Marek Vasut
2020-01-21 17:12 ` Alexandre Torgue
2020-01-21 17:21 ` Marc Zyngier
2020-01-22 16:56 ` Alexandre Torgue
2020-01-21 17:41 ` Marek Vasut
2020-01-22 17:19 ` Alexandre Torgue
2020-01-22 19:29 ` Marek Vasut
2020-01-23 8:27 ` Alexandre Torgue
2020-01-23 9:22 ` Marc Zyngier
2020-01-23 10:12 ` Uwe Kleine-König
2020-01-23 10:44 ` Marc Zyngier
2020-01-23 10:52 ` Uwe Kleine-König
2020-01-23 11:18 ` Marc Zyngier
2020-01-23 22:21 ` Marek Vasut
2020-01-24 9:17 ` Alexandre Torgue
2020-01-24 9:24 ` Marc Zyngier [this message]
2020-01-28 18:32 ` Marek Vasut
2020-02-05 10:26 ` Marek Vasut
2020-02-05 11:42 ` Marc Zyngier
2020-02-05 11:53 ` Marek Vasut
2020-02-05 12:32 ` Marc Zyngier
2020-02-05 15:36 ` Alexandre TORGUE
2020-02-06 2:00 ` Marek Vasut
2020-01-24 12:25 ` Marek Vasut
2020-01-24 9:21 ` Marc Zyngier
2020-01-24 9:35 ` Alexandre Torgue
2020-01-23 22:21 ` Marek Vasut
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