Re: [PATCH 1/2] irqchip: irq-meson-gpio: make it possible to build as a module
From: Marc Zyngier <maz@kernel.org>
Date: 2021-08-03 09:51:26
Also in:
linux-amlogic, lkml
On Tue, 03 Aug 2021 10:44:34 +0100, Marc Zyngier [off-list ref] 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. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel