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| author | Sergey Yanovich | 2016-09-27 18:23:16 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2016-10-27 16:03:09 +0200 |
| commit | ab28f51c77cd46189aa5726c98d5153052567a3c (patch) | |
| tree | 643562e7db907aa2e4685f15c861b9d785604da6 /drivers/tty/serial/8250/Kconfig | |
| parent | Linux 4.9-rc2 (diff) | |
| download | kernel-qcow2-linux-ab28f51c77cd46189aa5726c98d5153052567a3c.tar.gz kernel-qcow2-linux-ab28f51c77cd46189aa5726c98d5153052567a3c.tar.xz kernel-qcow2-linux-ab28f51c77cd46189aa5726c98d5153052567a3c.zip | |
serial: rewrite pxa2xx-uart to use 8250_core
pxa2xx-uart was a separate uart platform driver. It was declaring
the same device names and numbers as 8250 driver. As a result,
it was impossible to use 8250 driver on PXA SoCs.
Upon closer examination pxa2xx-uart turned out to be a clone of
8250_core driver.
Workaround for Erratum #19 according to Marvel(R) PXA270M Processor
Specification Update (April 19, 2010) is dropped. 8250_core reads
from FIFO immediately after checking DR bit in LSR.
The patch leaves the original SERIAL_PXA driver around. The original
driver is just marked DEPRECATED in Kconfig and C source. When
the original driver is considered safe to remove, no changes
to SERIAL_8250 will be necessary.
Compiling SERIAL_8250_CONSOLE and SERIAL_PXA_CONSOLE even without
SERIAL_8250_PXA breaks console for SERIAL_PXA. For this reasons, the new
and the original drivers are made mutually exclusive.
Signed-off-by: Sergei Ianovich <ynvich@gmail.com>
CC: Heikki Krogerus <heikki.krogerus@linux.intel.com>
CC: James Cameron <quozl@laptop.org>
CC: Robert Jarzmik <robert.jarzmik@free.fr>
CC: Russell King <linux@arm.linux.org.uk>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
[rebased on v4.8]
Tested-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/8250/Kconfig')
| -rw-r--r-- | drivers/tty/serial/8250/Kconfig | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig index 899834776b36..0b8b6740ba43 100644 --- a/drivers/tty/serial/8250/Kconfig +++ b/drivers/tty/serial/8250/Kconfig @@ -439,6 +439,16 @@ config SERIAL_8250_MOXA This driver can also be built as a module. The module will be called 8250_moxa. If you want to do that, say M here. +config SERIAL_8250_PXA + tristate "PXA serial port support" + depends on SERIAL_8250 + depends on ARCH_PXA || ARCH_MMP + help + If you have a machine based on an Intel XScale PXA2xx CPU you can + enable its onboard serial ports by enabling this option. The option is + applicable to both devicetree and legacy boards, and early console is + part of its support. + config SERIAL_OF_PLATFORM tristate "Devicetree based probing for 8250 ports" depends on SERIAL_8250 && OF |