On Sun, Sep 04, 2022 at 12:43:48PM +0100, Marc Zyngier wrote:

On Thu, 18 Aug 2022 22:15:46 +0100,
Arnd Bergmann [off-list ref] wrote:

quoted

From: Arnd Bergmann <arnd@arndb.de>

I had an older patch to remove the addin mode for footbridge,
which nobody is using any more, and I found a few other small
cleanups that are worth doing here.

Footbridge is now the only platform with a custom __virt_to_bus()
for ISA DMA, and a custom phys_to_dma() for PCI devices. Both
just add a fixed offset, so there is probably a better way
of doing the same without a custom helper function.

     Arnd

Arnd Bergmann (4):
  ARM: footbridge: remove addin mode
  ARM: footbridge: remove leftover from personal-server
  ARM: footbridge: move isa-dma support into footbridge
  ARM: footbridge: limit CONFIG_ISA to CATS

 arch/arm/Kconfig                              |  5 --
 arch/arm/include/asm/hardware/dec21285.h      | 13 ----
 arch/arm/kernel/Makefile                      |  1 -
 arch/arm/mach-footbridge/Kconfig              | 30 +-------
 arch/arm/mach-footbridge/Makefile             |  5 +-
 arch/arm/mach-footbridge/common.c             | 73 ++-----------------
 arch/arm/mach-footbridge/dc21285.c            | 61 +++++-----------
 .../arm/{kernel => mach-footbridge}/dma-isa.c |  7 +-
 arch/arm/mach-footbridge/dma.c                | 58 ---------------
 .../mach-footbridge/include/mach/isa-dma.h    | 14 +---
 .../arm/mach-footbridge/include/mach/memory.h | 22 ------
 arch/arm/mach-footbridge/isa.c                | 14 ++--
 drivers/tty/serial/21285.c                    |  3 -
 13 files changed, 42 insertions(+), 264 deletions(-)
 rename arch/arm/{kernel => mach-footbridge}/dma-isa.c (98%)
 delete mode 100644 arch/arm/mach-footbridge/dma.c

-- 
2.29.2

Cc: Russell King <linux@armlinux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Linus Walleij <redacted>
Cc: Marc Zyngier <maz@kernel.org>

I finally managed to give this a go on my netwinder using v2 of patch
5/4 (!), and the box booted nicely.

Note that apart from the serial console, everything I'm using on this
box is PCI (I tried to enable sound and failed, probably because I
can't select CONFIG_ISA anymore on this machine).

That tends to mean, therefore, that the statement "CONFIG_ISA is for
add-in cards" is wrong, because it's caused a user-visible regression
by killing sound support on Netwinders!

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel