[PATCH 0/2] irq-meson-gpio: make it possible to build as a module
Marc Zyngier
maz at kernel.org
Sun Oct 25 07:51:27 EDT 2020
On Tue, 20 Oct 2020 08:25:30 +0100,
Neil Armstrong <narmstrong at baylibre.com> wrote:
>
> In order to reduce the kernel Image size on multi-platform distributions,
> make it possible to build the Amlogic GPIO IRQ controller as a module
> by switching it to a platform driver.
>
> The second patch removes MESON_IRQ_GPIO selection from ARCH_MESON to allow
> building the driver as module.
>
> Neil Armstrong (2):
> irqchip: irq-meson-gpio: make it possible to build as a module
> arm64: meson: remove MESON_IRQ_GPIO selection
>
> arch/arm64/Kconfig.platforms | 1 -
> drivers/irqchip/Kconfig | 5 +-
> drivers/irqchip/irq-meson-gpio.c | 89 ++++++++++++++++++++------------
> 3 files changed, 59 insertions(+), 36 deletions(-)
I've tried this series on my vim3l with the this driver compiled as a
module, and lost the Ethernet interface in the process, as the phy
wasn't able to resolve its interrupt and things fail later on:
[ 72.238291] meson8b-dwmac ff3f0000.ethernet eth1: no phy at addr -1
[ 72.238917] meson8b-dwmac ff3f0000.ethernet eth1: stmmac_open: Cannot attach to PHY (error: -19)
This is a generic problem with making DT-based interrupt controllers
modular when not *all* the drivers can deal with probing deferral.
M.
--
Without deviation from the norm, progress is not possible.
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