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| author | Sergey Yanovich <ynvich@gmail.com> | 2016-09-27 18:23:16 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-10-27 16:03:09 +0200 |
| commit | ab28f51c77cd46189aa5726c98d5153052567a3c (patch) | |
| tree | 643562e7db907aa2e4685f15c861b9d785604da6 /drivers/tty/serial/Kconfig | |
| parent | 07d9a380680d1c0eb51ef87ff2eab5c994949e69 (diff) | |
| download | op-kernel-dev-ab28f51c77cd46189aa5726c98d5153052567a3c.zip op-kernel-dev-ab28f51c77cd46189aa5726c98d5153052567a3c.tar.gz | |
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/Kconfig')
| -rw-r--r-- | drivers/tty/serial/Kconfig | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index c783140..f9c595c 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -438,17 +438,27 @@ config SERIAL_MPSC_CONSOLE Say Y here if you want to support a serial console on a Marvell MPSC. config SERIAL_PXA - bool "PXA serial port support" + bool "PXA serial port support (DEPRECATED)" depends on ARCH_PXA || ARCH_MMP select SERIAL_CORE + select SERIAL_8250_PXA if SERIAL_8250=y + select SERIAL_PXA_NON8250 if !SERIAL_8250=y help If you have a machine based on an Intel XScale PXA2xx CPU you can enable its onboard serial ports by enabling this option. + Unless you have a specific need, you should use SERIAL_8250_PXA + instead of this. + +config SERIAL_PXA_NON8250 + bool + depends on !SERIAL_8250 + config SERIAL_PXA_CONSOLE - bool "Console on PXA serial port" + bool "Console on PXA serial port (DEPRECATED)" depends on SERIAL_PXA select SERIAL_CORE_CONSOLE + select SERIAL_8250_CONSOLE if SERIAL_8250=y help If you have enabled the serial port on the Intel XScale PXA CPU you can make it the console by answering Y to this option. @@ -460,6 +470,9 @@ config SERIAL_PXA_CONSOLE your boot loader (lilo or loadlin) about how to pass options to the kernel at boot time.) + Unless you have a specific need, you should use SERIAL_8250_PXA + and SERIAL_8250_CONSOLE instead of this. + config SERIAL_SA1100 bool "SA1100 serial port support" depends on ARCH_SA1100 |
