serial: 8250: split Moxa PCIe serial board support out of 8250_pci

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The Moxa PCIe multiport serial boards are currently handled as part of
8250_pci.c. In preparation for adding Moxa-specific UART features and
optimizations, move the Moxa PCIe implementation into a dedicated
driver.

This introduces drivers/tty/serial/8250/8250_mxpcie.c and wires it up
via Kconfig and Makefile, while preserving the existing probe flow and
device IDs.

This change was suggested during earlier reviews by Andy Shevchenko [1][2].

No functional change intended.

Link: https://lore.kernel.org/all/ZmQovC6TbDpTb3c8@surfacebook.localdomain/ [1]
Link: https://lore.kernel.org/all/CAHp75VeDsVt0GQYUFxLM+obfmqXBPa3hM3YMsFbc26uzWZG-SQ@mail.gmail.com/ [2]
Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Crescent Hsieh <crescentcy.hsieh@moxa.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://patch.msgid.link/20260731074820.735619-2-crescentcy.hsieh@moxa.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Crescent Hsieh 2026-07-31 15:48:07 +08:00 • committed by Greg Kroah-Hartman

parent f56b8eef48

commit 0481a041e9

4 changed files with 302 additions and 242 deletions

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288

drivers/tty/serial/8250/8250_mxpcie.c

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245

drivers/tty/serial/8250/8250_pci.c

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10

drivers/tty/serial/8250/Kconfig

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1

drivers/tty/serial/8250/Makefile

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