On Mon, 5 Jun 2023, Uwe Kleine-König wrote: > The need to handle the FSL variant of 8250 in a special way is also > present without console support. So soften the dependency for > SERIAL_8250_FSL accordingly. Note that with the 8250 driver compiled as > a module, some devices still might not make use of the needed > workarounds. That affects the ports instantiated in > arch/powerpc/kernel/legacy_serial.c. > > This issue was identified by Dominik Andreas Schorpp. > > To cope for CONFIG_SERIAL_8250=m + CONFIG_SERIAL_8250_FSL=y, 8250_fsl.o > must be put in the same compilation unit as 8250_port.o because the > latter defines some functions needed in the former and so 8250_fsl.o > must not be built-in if 8250_port.o is available in a module. > > Acked-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx> > Link: https://lore.kernel.org/r/20230531083230.2702181-1-u.kleine-koenig@xxxxxxxxxxxxxx > Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx> > --- > drivers/tty/serial/8250/Kconfig | 2 +- > drivers/tty/serial/8250/Makefile | 2 +- > 2 files changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig > index 5313aa31930f..10c09b19c871 100644 > --- a/drivers/tty/serial/8250/Kconfig > +++ b/drivers/tty/serial/8250/Kconfig > @@ -378,7 +378,7 @@ config SERIAL_8250_BCM2835AUX > > config SERIAL_8250_FSL > bool "Freescale 16550 UART support" if COMPILE_TEST && !(PPC || ARM || ARM64) > - depends on SERIAL_8250_CONSOLE > + depends on SERIAL_8250 Just one additional thought: After the adding the arch side workaround/hack, SERIAL_8250_FSL could become a tristate? (1/2 might need a small change to take into account that it can now be a module). > default PPC || ARM || ARM64 > help > Selecting this option enables a workaround for a break-detection > diff --git a/drivers/tty/serial/8250/Makefile b/drivers/tty/serial/8250/Makefile > index 4fc2fc1f41b6..8824ba5295b6 100644 > --- a/drivers/tty/serial/8250/Makefile > +++ b/drivers/tty/serial/8250/Makefile > @@ -12,6 +12,7 @@ obj-$(CONFIG_SERIAL_8250) += 8250.o 8250_base.o > 8250_base-$(CONFIG_SERIAL_8250_DMA) += 8250_dma.o > 8250_base-$(CONFIG_SERIAL_8250_DWLIB) += 8250_dwlib.o > 8250_base-$(CONFIG_SERIAL_8250_FINTEK) += 8250_fintek.o > +8250_base-$(CONFIG_SERIAL_8250_FSL) += 8250_fsl.o > 8250_base-$(CONFIG_SERIAL_8250_PCILIB) += 8250_pcilib.o > obj-$(CONFIG_SERIAL_8250_PARISC) += 8250_parisc.o > obj-$(CONFIG_SERIAL_8250_PCI) += 8250_pci.o > @@ -28,7 +29,6 @@ obj-$(CONFIG_SERIAL_8250_BOCA) += 8250_boca.o > obj-$(CONFIG_SERIAL_8250_EXAR_ST16C554) += 8250_exar_st16c554.o > obj-$(CONFIG_SERIAL_8250_HUB6) += 8250_hub6.o > obj-$(CONFIG_SERIAL_8250_PCI1XXXX) += 8250_pci1xxxx.o > -obj-$(CONFIG_SERIAL_8250_FSL) += 8250_fsl.o > obj-$(CONFIG_SERIAL_8250_MEN_MCB) += 8250_men_mcb.o > obj-$(CONFIG_SERIAL_8250_DFL) += 8250_dfl.o > obj-$(CONFIG_SERIAL_8250_DW) += 8250_dw.o -- i.
