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>

serial_ns16550: readd support for mvebu armada 38x ...

The armada 38x device tree traditionally used "snps,dw-apb-uart" as
compatible for the internal UARTs. This was changed in Linux by commit
b7639b0b15dd ("serial: 8250_dw: Limit dw8250_tx_wait_empty quirk to
armada-38x devices") which was imported into barebox in e4067b75fb6c
("dts: update to v4.18-rc1") to "marvell,armada-38x-uart".

Teach the driver about the new compatible to make the console work
again.

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

ARM: stm32mp1: Add serial driver ...

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

serial_ns16550: add raspberry pi compatible and init ...

Add the compatible for the Raspberry Pi AUX UART and an init function which
enables it via the aux register and configures the correct shift value.

Signed-off-by: Rouven Czerwinski <r.czerwinski@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

serial_ns16550: handle default reg-io-width ...

According to the device tree bindings for 8250, width is an optional property.
Default to 1 which is the same default value as used by the kernel.
Before this change the driver would not work for device trees which do not
include the optional binding.

Signed-off-by: Rouven Czerwinski <r.czerwinski@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/missing-prototypes'

Merge branch 'for-next/misc'

serial: amba-pl011: fix "no previous prototype for 'pl011_init_port'" warning ...

The patch fixes the following compiler's warning:

drivers/serial/amba-pl011.c:151:5: warning: no previous prototype for ‘pl011_init_port’ [-Wmissing-prototypes]
 int pl011_init_port (struct console_device *cdev)
     ^~~~~~~~~~~~~~~

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

serial: clps711x: Determine device name from device tree ...

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

serial: clps711x: Use DIV_ROUND_CLOSEST() for baudrate calculation ...

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

serial: clps711x: Switch to SPDX identifier ...

Adopt the SPDX license identifier headers to ease license compliance
management.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

serial: clps711x: Change compatible string ...

This patch changes compatible string for CLPS711X serial driver
to "cirrus,ep7209-uart" for conform with linux kernel.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

serial: amba-pl011: Fix regulator_get() return check ...

NULL is used to designate a dummy regulator, so it it should be safe
to use against regulator_enable(). Any value that would retrun true
for IS_ERR(), OTOH, is not. Such value would also pass "if (r)" check
without any problems.

Fix the code to use !IS_ERR() instead.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

serdev: select POLLER ...

A lot of the inner working of the serdev framework depend on the poller,
so there is no point in allowing to build without poller support.

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

serial: lpuart: Avoid division by zero when requested baudrate is ...

With serdev device support added there's now a corner case where:

 1. There is a DT node for a serdev device on one of the UARTs
 2. There is no driver that binds against serdev device's compatibility
    string

with 1 and 2 being true it is possible to end up in a situation where
a particualr UART has not been initalized to any baudrate when
clock_notifier_call_chain() gets called. This effectively translates
to

	set_baudrate(uart, 0);

which for LPUART driver result in a division by zero.

To avoid this problem, convert lpuart_serial_setbaudrate() to treat
zero baudrate as a request to disable the UART. While we are at it add
a BUG_ON() to lpuart_setbrg() to simplify finding any future bugs.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

serial: i.MX: Add i.MX8 support ...

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

Merge branch 'for-next/serdev'