From: Marek Behun <marek.behun@nic.cz>
To: "Pali Rohár" <pali@kernel.org>
Cc: "Bjorn Helgaas" <helgaas@kernel.org>,
"Toke Høiland-Jørgensen" <toke@redhat.com>,
vtolkm@gmail.com, linux-pci@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
"Rob Herring" <robh@kernel.org>,
"Ilias Apalodimas" <ilias.apalodimas@linaro.org>,
"Thomas Petazzoni" <thomas.petazzoni@bootlin.com>,
"Jason Cooper" <jason@lakedaemon.net>
Subject: Re: PCI trouble on mvebu (Turris Omnia)
Date: Fri, 30 Oct 2020 11:45:44 +0100 [thread overview]
Message-ID: <20201030114544.0df96939@nic.cz> (raw)
In-Reply-To: <20201030100807.74r3vp4kyw44kcwp@pali>
On Fri, 30 Oct 2020 11:08:07 +0100
Pali Rohár <pali@kernel.org> wrote:
> On Turris Omnia (with pci-mvebu) PERST# pin from wifi card is connected
> to MCU and it asserts/deasserts this pin only after board reset. Also it
> is shared line across all mPCIe slots and also with other peripherals.
>
> So we cannot issue reset via PERST# signal on Turris Omnia. But there
> are other ways how to issue fundamental reset, via in band signaling.
We can code this into MCU code, AFAIK it is upgradable from main CPU
via I2C :) I wanted to try this because of LEDs anyway...
But I think that all 3 PCIe slots have their PERST# signal connected to
just one GPIO on the MCU...
WARNING: multiple messages have this Message-ID (diff)
From: Marek Behun <marek.behun@nic.cz>
To: "Pali Rohár" <pali@kernel.org>
Cc: "Rob Herring" <robh@kernel.org>,
"Ilias Apalodimas" <ilias.apalodimas@linaro.org>,
"Jason Cooper" <jason@lakedaemon.net>,
linux-pci@vger.kernel.org,
"Toke Høiland-Jørgensen" <toke@redhat.com>,
"Bjorn Helgaas" <helgaas@kernel.org>,
"Thomas Petazzoni" <thomas.petazzoni@bootlin.com>,
vtolkm@gmail.com, linux-arm-kernel@lists.infradead.org
Subject: Re: PCI trouble on mvebu (Turris Omnia)
Date: Fri, 30 Oct 2020 11:45:44 +0100 [thread overview]
Message-ID: <20201030114544.0df96939@nic.cz> (raw)
In-Reply-To: <20201030100807.74r3vp4kyw44kcwp@pali>
On Fri, 30 Oct 2020 11:08:07 +0100
Pali Rohár <pali@kernel.org> wrote:
> On Turris Omnia (with pci-mvebu) PERST# pin from wifi card is connected
> to MCU and it asserts/deasserts this pin only after board reset. Also it
> is shared line across all mPCIe slots and also with other peripherals.
>
> So we cannot issue reset via PERST# signal on Turris Omnia. But there
> are other ways how to issue fundamental reset, via in band signaling.
We can code this into MCU code, AFAIK it is upgradable from main CPU
via I2C :) I wanted to try this because of LEDs anyway...
But I think that all 3 PCIe slots have their PERST# signal connected to
just one GPIO on the MCU...
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next prev parent reply other threads:[~2020-10-30 10:45 UTC|newest]
Thread overview: 124+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-27 15:43 PCI trouble on mvebu (Turris Omnia) Toke Høiland-Jørgensen
2020-10-27 15:43 ` Toke Høiland-Jørgensen
2020-10-27 17:20 ` Bjorn Helgaas
2020-10-27 17:20 ` Bjorn Helgaas
2020-10-27 17:44 ` ™֟☻̭҇ Ѽ ҉ ®
2020-10-27 17:44 ` ™֟☻̭҇ Ѽ ҉ ®
2020-10-27 18:59 ` Toke Høiland-Jørgensen
2020-10-27 18:59 ` Toke Høiland-Jørgensen
2020-10-27 20:20 ` Toke Høiland-Jørgensen
2020-10-27 20:20 ` Toke Høiland-Jørgensen
2020-10-27 21:22 ` ™֟☻̭҇ Ѽ ҉ ®
2020-10-27 21:22 ` ™֟☻̭҇ Ѽ ҉ ®
2020-10-27 21:31 ` Toke Høiland-Jørgensen
2020-10-27 21:31 ` Toke Høiland-Jørgensen
2020-10-27 22:01 ` ™֟☻̭҇ Ѽ ҉ ®
2020-10-27 22:01 ` ™֟☻̭҇ Ѽ ҉ ®
2020-10-27 22:12 ` Toke Høiland-Jørgensen
2020-10-27 22:12 ` Toke Høiland-Jørgensen
2020-10-27 18:56 ` Toke Høiland-Jørgensen
2020-10-27 18:56 ` Toke Høiland-Jørgensen
2020-10-28 13:36 ` Toke Høiland-Jørgensen
2020-10-28 13:36 ` Toke Høiland-Jørgensen
2020-10-28 14:42 ` Bjorn Helgaas
2020-10-28 14:42 ` Bjorn Helgaas
2020-10-28 15:08 ` Toke Høiland-Jørgensen
2020-10-28 15:08 ` Toke Høiland-Jørgensen
2020-10-28 16:40 ` ™֟☻̭҇ Ѽ ҉ ®
2020-10-28 16:40 ` ™֟☻̭҇ Ѽ ҉ ®
2020-10-28 23:16 ` Bjorn Helgaas
2020-10-28 23:16 ` Bjorn Helgaas
2020-10-29 10:09 ` Pali Rohár
2020-10-29 10:09 ` Pali Rohár
2020-10-29 10:56 ` ™֟☻̭҇ Ѽ ҉ ®
2020-10-29 10:56 ` ™֟☻̭҇ Ѽ ҉ ®
2020-10-29 11:12 ` Toke Høiland-Jørgensen
2020-10-29 11:12 ` Toke Høiland-Jørgensen
2020-10-29 19:30 ` Bjorn Helgaas
2020-10-29 19:30 ` Bjorn Helgaas
2020-10-29 19:56 ` ™֟☻̭҇ Ѽ ҉ ®
2020-10-29 19:56 ` ™֟☻̭҇ Ѽ ҉ ®
2020-10-29 19:57 ` Andrew Lunn
2020-10-29 19:57 ` Andrew Lunn
2020-10-29 21:55 ` Thomas Petazzoni
2020-10-29 21:55 ` Thomas Petazzoni
2020-10-29 20:18 ` Toke Høiland-Jørgensen
2020-10-29 20:18 ` Toke Høiland-Jørgensen
2020-10-29 22:09 ` Toke Høiland-Jørgensen
2020-10-29 22:09 ` Toke Høiland-Jørgensen
2020-10-29 20:58 ` Marek Behun
2020-10-29 20:58 ` Marek Behun
2020-10-30 10:08 ` Pali Rohár
2020-10-30 10:08 ` Pali Rohár
2020-10-30 10:45 ` Marek Behun [this message]
2020-10-30 10:45 ` Marek Behun
2020-10-29 21:54 ` Thomas Petazzoni
2020-10-29 21:54 ` Thomas Petazzoni
2020-10-29 23:15 ` Toke Høiland-Jørgensen
2020-10-29 23:15 ` Toke Høiland-Jørgensen
2020-10-30 8:23 ` Thomas Petazzoni
2020-10-30 8:23 ` Thomas Petazzoni
2020-10-30 10:15 ` Pali Rohár
2020-10-30 10:15 ` Pali Rohár
2020-10-29 10:41 ` Toke Høiland-Jørgensen
2020-10-29 10:41 ` Toke Høiland-Jørgensen
2020-10-29 11:18 ` ™֟☻̭҇ Ѽ ҉ ®
2020-10-29 11:18 ` ™֟☻̭҇ Ѽ ҉ ®
2020-10-30 11:23 ` Pali Rohár
2020-10-30 11:23 ` Pali Rohár
2020-10-30 13:02 ` Toke Høiland-Jørgensen
2020-10-30 13:02 ` Toke Høiland-Jørgensen
2020-10-30 14:23 ` Pali Rohár
2020-10-30 14:23 ` Pali Rohár
2020-10-30 14:54 ` ™֟☻̭҇ Ѽ ҉ ®
2020-10-30 14:54 ` ™֟☻̭҇ Ѽ ҉ ®
2020-10-31 12:49 ` Toke Høiland-Jørgensen
2020-10-31 12:49 ` Toke Høiland-Jørgensen
2020-11-02 15:24 ` Pali Rohár
2020-11-02 15:24 ` Pali Rohár
2020-11-02 15:54 ` Toke Høiland-Jørgensen
2020-11-02 15:54 ` Toke Høiland-Jørgensen
2020-11-02 16:18 ` ™֟☻̭҇ Ѽ ҉ ®
2020-11-02 16:18 ` ™֟☻̭҇ Ѽ ҉ ®
2020-11-02 16:33 ` Toke Høiland-Jørgensen
2020-11-02 16:33 ` Toke Høiland-Jørgensen
2021-03-15 19:58 ` Pali Rohár
2021-03-15 19:58 ` Pali Rohár
2021-03-16 9:25 ` Pali Rohár
2021-03-16 9:25 ` Pali Rohár
2021-03-18 22:43 ` Toke Høiland-Jørgensen
2021-03-18 22:43 ` Toke Høiland-Jørgensen
2021-03-18 23:16 ` Pali Rohár
2021-03-18 23:16 ` Pali Rohár
2021-03-26 12:50 ` Pali Rohár
2021-03-26 12:50 ` Pali Rohár
2021-03-26 15:25 ` Toke Høiland-Jørgensen
2021-03-26 15:25 ` Toke Høiland-Jørgensen
2021-03-26 15:34 ` Pali Rohár
2021-03-26 15:34 ` Pali Rohár
2021-03-26 16:54 ` Toke Høiland-Jørgensen
2021-03-26 16:54 ` Toke Høiland-Jørgensen
2021-03-26 17:11 ` Pali Rohár
2021-03-26 17:11 ` Pali Rohár
2021-03-26 17:51 ` Toke Høiland-Jørgensen
2021-03-26 17:51 ` Toke Høiland-Jørgensen
2021-03-29 17:09 ` Pali Rohár
2021-03-29 17:09 ` Pali Rohár
2021-03-31 14:02 ` Toke Høiland-Jørgensen
2021-03-31 14:02 ` Toke Høiland-Jørgensen
2021-03-31 16:15 ` Pali Rohár
2021-03-31 16:15 ` Pali Rohár
2021-03-31 16:53 ` Toke Høiland-Jørgensen
2021-03-31 16:53 ` Toke Høiland-Jørgensen
2020-10-29 1:21 ` Marek Behun
2020-10-29 1:21 ` Marek Behun
2020-10-29 15:12 ` Rob Herring
2020-10-29 15:12 ` Rob Herring
2020-10-27 18:03 ` Marek Behun
2020-10-27 18:03 ` Marek Behun
2020-10-27 19:00 ` Toke Høiland-Jørgensen
2020-10-27 19:00 ` Toke Høiland-Jørgensen
2020-10-27 20:19 ` Marek Behun
2020-10-27 20:19 ` Marek Behun
2020-10-27 20:49 ` Toke Høiland-Jørgensen
2020-10-27 20:49 ` Toke Høiland-Jørgensen
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