linux-stable.git/drivers/tty/serial/of_serial.c, branch master

serial: 8250: move of_serial code to 8250 directory

2015-12-14T03:59:48+00:00

As the of-serial driver is now 8250 specific, we can move the
file to a more appropriate place in teh 8250 subdirectory and
adapt the Kconfig help text and file name.

I'm leaving the CONFIG_SERIAL_OF_PLATFORM symbol unchanged
to avoid breaking user configuration files unnecessarily.

Signed-off-by: Arnd Bergmann 
Signed-off-by: Greg Kroah-Hartman

serial: of: CONFIG_SERIAL_8250 is always set

2015-12-14T03:59:48+00:00

The only other user of this code was the nwp-serial driver, but that
is now gone, so we can remove a couple of #ifdef statments in this
driver.

Signed-off-by: Arnd Bergmann 
Signed-off-by: Greg Kroah-Hartman

serial: remove NWP serial support

2015-12-14T03:59:48+00:00

The NWP serial driver is no longer needed, as the two users of
this hardware have migrated to a much faster generation hardware,
see https://en.wikipedia.org/wiki/QPACE2 for the replacement.

Signed-off-by: Arnd Bergmann 
Cc: Benjamin Krill 
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Greg Kroah-Hartman

serial: support 16-bit register interface for console

2015-12-14T03:59:48+00:00

Currently, 8-bit (MMIO) and 32-bit (MMIO32) register interfaces are
supported for the 8250 console, but the 16-bit (MMIO16) is not.
The 8250 UART device on my board is connected to a 16-bit bus and
my main motivation is to use earlycon with it.
(Refer to arch/arm/boot/dts/uniphier-support-card.dtsi)

Signed-off-by: Masahiro Yamada 
Reviewed-by: Peter Hurley 
Signed-off-by: Greg Kroah-Hartman

serial: Enable Freescale 16550 workaround on arm

2015-10-18T04:05:46+00:00

The same serial hardware is present on LS2080A which is arm64, and
LS1021A which is arm32, so don't limit the workaround to PPC.

Unlike PPC which uses arch/powerpc/kernel/legacy_serial.c, the ARM
targets use drivers/tty/serial/of_serial.c, so add the handle_irq
override check there as well.

Signed-off-by: Scott Wood 
Acked-by: Arnd Bergmann 
Signed-off-by: Greg Kroah-Hartman

tty: serial: of_serial: Fix module autoload for OF platform driver

2015-10-04T18:09:21+00:00

This platform driver has a OF device ID table but the OF module
alias information is not created so module autoloading won't work.

Signed-off-by: Luis de Bethencourt 
Signed-off-by: Greg Kroah-Hartman

serial: of-serial: compile correctly when 8250 driver is compiled as module

2015-10-04T16:47:49+00:00

If the 8250 driver is compiled as a module then
CONFIG_SERIAL_8250_MODULE is defined and not CONFIG_SERIAL_8250.

This results in all those code sections that require CONFIG_SERIAL_8250
to be defined are not included.

This patch fixes the situation and allows 8250 and of-serial to
be compiled as a module with the same functionality as when
compiled into the kernel.

Signed-off-by: Martin Sperl 
Signed-off-by: Greg Kroah-Hartman

serial: of_serial: check the return value of clk_prepare_enable()

2015-05-31T21:55:12+00:00

The function clk_prepare_enable() may fail, and in that case it
does not make sense to proceed.  Let's check its return code and
error out if it is a negative value.

Signed-off-by: Masahiro Yamada 
Signed-off-by: Greg Kroah-Hartman

serial: of_serial: use devm_clk_get() instead of clk_get()

2015-05-31T21:55:12+00:00

The probe method of this driver calls clk_get(), but clk_put() is
missing from the remove callback.

Using the managed clk function is easier than fixing other parts.

Signed-off-by: Masahiro Yamada 
Signed-off-by: Greg Kroah-Hartman

serial: of_serial: do not set port.type twice

2015-05-10T17:10:08+00:00

The port.type has already been set by of_platform_serial_setup()
called from a few lines above.
Setting it to the same value is redundant.

Signed-off-by: Masahiro Yamada 
Signed-off-by: Greg Kroah-Hartman