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From: Marc Zyngier <maz@kernel.org>
To: Kevin Hilman <khilman@baylibre.com>
Cc: Lee Jones <lee.jones@linaro.org>,
	Neil Armstrong <narmstrong@baylibre.com>,
	Jerome Brunet <jbrunet@baylibre.com>,
	linux-amlogic@lists.infradead.org,
	linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
	open list <linux-kernel@vger.kernel.org>,
	Saravana Kannan <saravanak@google.com>
Subject: Re: [PATCH 1/2] irqchip: irq-meson-gpio: make it possible to build as a module
Date: Tue, 03 Aug 2021 10:51:11 +0100	[thread overview]
Message-ID: <87h7g626wg.wl-maz@kernel.org> (raw)
In-Reply-To: <87im0m277h.wl-maz@kernel.org>

On Tue, 03 Aug 2021 10:44:34 +0100,
Marc Zyngier <maz@kernel.org> wrote:

[...]

> This thing keeps failing on my end. It only works if I force the
> irqchip module to be present before the MDIO module is loaded. Here's
> an example:
> 
> root@tiger-roach:~# modprobe mdio_mux_meson_g12a
> [  125.871544] libphy: mdio_mux: probed
> [  125.882575] g12a-mdio_mux ff64c000.mdio-multiplexer: Error: Failed to register MDIO bus for child /soc/bus@ff600000/mdio-multiplexer@4c000/mdio@0
> [  125.892630] libphy: mdio_mux: probed
> 
> Trying to bring up the Ethernet interface will fail. Note that there
> was no attempt to load the irqchip driver.
> 
> root@tiger-roach:~# modprobe -r mdio_mux_meson_g12a
> root@tiger-roach:~# modprobe irq-meson-gpio 
> [  144.983344] meson-gpio-intc ffd0f080.interrupt-controller: 100 to 8 gpio interrupt mux initialized
> root@tiger-roach:~# modprobe mdio_mux_meson_g12a
> [  150.376464] libphy: mdio_mux: probed
> [  150.391039] libphy: mdio_mux: probed
> 
> And it now works.

An additional source of amusement is that this patch allows the
irqchip to be removed from the kernel. It becomes really fun when you
have live interrupts...

	M.

-- 
Without deviation from the norm, progress is not possible.

  reply	other threads:[~2021-08-03  9:51 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-20  7:25 [PATCH 0/2] " Neil Armstrong
2020-10-20  7:25 ` [PATCH 1/2] irqchip: " Neil Armstrong
2020-10-20 18:23   ` Kevin Hilman
     [not found]     ` <CAF2Aj3g6c8FEZb3e1by6sd8LpKLaeN5hsKrrQkZUvh8hosiW9A@mail.gmail.com>
2021-05-24 10:11       ` Marc Zyngier
2021-05-25 16:17         ` Kevin Hilman
2021-05-25 16:30           ` Lee Jones
2021-06-14 22:30         ` Kevin Hilman
2021-07-13  9:05           ` Lee Jones
2021-08-03  9:44           ` Marc Zyngier
2021-08-03  9:51             ` Marc Zyngier [this message]
2021-08-04  2:11               ` Saravana Kannan
2021-08-03  9:51             ` Neil Armstrong
2021-08-04  1:36             ` Saravana Kannan
2021-08-04  8:50               ` Marc Zyngier
2021-08-04 18:20                 ` Saravana Kannan
2021-08-04 21:47                   ` Saravana Kannan
2021-08-05  6:31                     ` Neil Armstrong
2021-08-06 23:55                       ` Saravana Kannan
2021-08-05  7:57                     ` Lee Jones
2021-08-16 12:47                       ` Lee Jones
2021-08-16 20:27                         ` Saravana Kannan
2021-08-16 20:46                           ` Andrew Lunn
2021-08-16 21:02                             ` Saravana Kannan
2021-08-16 21:18                               ` Andrew Lunn
2021-08-17  7:24                           ` Lee Jones
2021-08-17 18:12                             ` Saravana Kannan
2021-08-18 11:19                               ` Marc Zyngier
2021-09-02  9:28                                 ` Neil Armstrong
2020-10-20  7:25 ` [PATCH 2/2] arm64: meson: remove MESON_IRQ_GPIO selection Neil Armstrong
2020-10-20 23:18   ` Kevin Hilman
2020-10-25 11:51 ` [PATCH 0/2] irq-meson-gpio: make it possible to build as a module Marc Zyngier
2020-10-26 16:18   ` Kevin Hilman
2020-10-26 17:00     ` Marc Zyngier
2020-10-26 17:28       ` Kevin Hilman
2020-10-26 17:33         ` Kevin Hilman
2020-10-26 18:30         ` Marc Zyngier
2020-10-26 23:45       ` Kevin Hilman
2021-09-02 13:49 Neil Armstrong
2021-09-02 13:49 ` [PATCH 1/2] irqchip: " Neil Armstrong
2021-09-02 17:00   ` Saravana Kannan
2021-09-28 10:45     ` Lee Jones
2021-09-28 23:27   ` Kevin Hilman

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