Merge branch 'for-next/misc'

treewide: Convert files covered by ARM copyright to SPDX ...

According to Marc Zyngier, former employee at ARM, the company owns the
copyright for code created by its employees. Convert accordingly to SPDX
with the usual rearrangements. Also dropped Marc's email address which
doesn't work any more.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

serial: i.MX: Add i.MX8MP compatible ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

serial: stm: set linux_console_name ...

We set the linux_console_name so for this uart the
linux.bootargs.console will be properly set.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

serial: amba-pl011: set linux_console_name ...

We set the linux_console_name so for this uart the
linux.bootargs.console will be properly set.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

serial: Add flush function to NS16550 driver ...

Add flush function to NS16550 to remove bad characters being printed
during reset

Signed-off-by: David Dgien <dgienda125@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/mxs'

Merge branch 'for-next/misc'

drivers: explicitly select dependency STMP_DEVICE for i.MX23/28 drivers ...

Some of the i.MXs drivers can be build tested even if building for other
platforms. Support adding a future COMPILE_TEST dependency to some of
these drivers by explicitly having their Kconfig symbol select STMP_DEVICE
if the driver calls stmp_reset_block.

This has not been necessary for the normal build, because the ARCH
symbols for the IMX23 and IMX28 already selected STMP_DEVICE.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

serial: mxs auart: Set Linux console name ...

The MXS AUART is in the kernel known as "ttyAPP". Set the Linux console
name to make automatic setting of the console= Kernel parameter work.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

treewide: remove references to CREDITS ...

The CREDITS file was removed from barebox in 2015 by commit 6570288f2d97
("Remove the CREDITS file"). Remove references to it from several files.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

serial: ns16550_pci: Use %pa to print resource_size_t ...

The correct format specifier for printing a resource_size_t is %pa. Use
it to avoid warninings.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

serial: imx: Add imx8mm compatible ...

Only add the compatible string to let the driver match.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

serial: ns16550_pci: fix possible read of uninitialized variable ...

When quirk->init is NULL, we evaluate an uninitialized rc.
Is we have already checked for rc < 0 at the point of assignment,
this if clause isn't needed. Remove it.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

serial: cadence: move register definitions into header file ...

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

serial: add support for PCI NS16550 UARTs ...

This ports over the Linux v5.4 8250_pci driver. Unlike Linux, the
barebox ns16550 implementation provides less hooks for covering all the
quirky behavior of all the different 8250-"compatible" hardware blocks.

The barebox driver matches against all serial port the Linux driver does,
but for hardware with quirks that can't be expressed in the current barebox
n16550 API, the probe fails with -ENOSYS and an appropriate message
telling that the quirk handling is missing. This should make future
extension of the driver straight-forward.

Unlike the kernel variant of the driver, most ->exit quirk callbacks can
be dropped in barebox as they often disable IRQs, which we do in the
->init anyway.

This was tested with the EFI PCI driver on qemu with the options:

  -device pci-serial,chardev=cdev0 -chardev file,id=cdev0,path=COM

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/efi'

serial: cadence: fix serial_flush ...

The TXEMPTY bit gets set as soon as the transmit FIFO gets empty, so
flushing must wait until the bit is set instead of being unset.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

serial: efi-stdio: Add simple_text_input_ex_protocol backend ...

EFI implementations differ in how simple_text_input_protocol treats
ctrl+alpha combinations. OVMF (used with QEMU) returns a Unicode control
character, the UEFI on the Dell Latitude 7490 on the other hand ignores
the ctrl completely and returns just the letter rendering utilities
like barebox edit unusable.

To fix this, the simple_text_input_ex_protocol can be leveraged as it
additionally provides the state of modifier keys. Extend efi-stdio to use
it where possible.

Cc: Michael Olbrich <mol@pengutronix.de>
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

serial: efi-stdio: replace globals with handles in priv struct ...

Despite assigning efi_sys_table->{con_in,con_out} to priv->{in,out},
some functions still use the global efi_sys_table->{con_in,con_out}.
Let's restrict globals access to the probe function and have the priv
struct completely describe input and output used in the callbacks.
No functional change.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/bfin'

serial: Remove NETX serial driver ...

NETX support has been removed from barebox. Remove the serial driver as
well.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

serial: Remove blackfin driver ...

The blackfin architecture has been removed from barebox. Remove the
serial driver as well.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/misc'

console: fix out-of-bounds read in dputc(/dev/*, ...) ...

Trying to output a single character via
	echo -a /dev/serial0-1
currently results in garbage output after the newline, because console.c's
fops_write discards the buffer length and passes the buffer to
(struct cdev)::puts which only handles NUL-terminated strings.

Fix this by amending (struct cdev)::puts with a new nbytes parameter,
which is correctly propagated. All this functions now return at most the
nbytes parameter they were passed in. This fixes __console_puts, which
used to count new lines twice in its return value.

Fixes: b4f55fcf35 ("console: expose consoles in devfs")
Cc: Bastian Krause <bst@pengutronix.de>
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

serial: atmel: set linux_console_name ...

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

serial: stm32: set linux_console_name ...

Linux names these UARTs ttySTM. Tell barebox about this, so it can be
used to correctly compose the console= kernel command line argument.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/misc'

serial: ns16550: support reg-offset device-tree property ...

Some SoC have serial registers with a fixed offset to the map base.
Support them by respecting 'reg-offset' device-tree property.

Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

serial: ar933x: set linux_console_name ...

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>