linux-toradex.git/include/linux/serial_core.h, branch v4.14-rc7

serial: core: remove unneeded irq_wake flag

2017-08-28T18:51:20+00:00

There is no need to duplicate a flag which IRQ core takes care of.

Replace custom flag by IRQ core API that retrieves its state.

Signed-off-by: Andy Shevchenko 
Signed-off-by: Greg Kroah-Hartman

serial: core: move UPF_NO_TXEN_TEST to quirks and rename

2017-07-30T14:44:22+00:00

First 16 bits in the flags field are user-visible except
UPF_NO_TXEN_TEST. To keep it clean we introduce internal quirks and move
UPF_NO_TXEN_TEST to them. Rename the constant to UPQ_NO_TXEN_TEST to
distinguish with port flags. Users are converted accordingly.

The quirks field might be extended later to hold the additional ones.

Signed-off-by: Andy Shevchenko 
Signed-off-by: Greg Kroah-Hartman

serial: 8250: Add flag so drivers can avoid THRE probe

2017-05-18T14:19:16+00:00

The probing of THRE irq behaviour assumes the other end will be reading
bytes out of the buffer in order to probe the port at driver init. In
some cases the other end cannot be relied upon to read these bytes, so
provide a flag for them to skip this step.

Bit 19 was chosen as the flags are a int and the top bits are taken.

Acked-by: Benjamin Herrenschmidt 
Signed-off-by: Joel Stanley 
Signed-off-by: Greg Kroah-Hartman

serial: core: constify struct uart_port {name} field

2017-04-08T16:51:57+00:00

Don't allow modifications of port name. It's serial core's business only.

Signed-off-by: Andy Shevchenko 
Signed-off-by: Greg Kroah-Hartman

tty: serial_core: Add name field to uart_port struct

2017-03-31T14:56:10+00:00

Introduce a field to store name of uart_port that can be used to easily
identify UART port instances on a system that has more than one UART
instance. The name is of the form ttyXN(eg. ttyS0, ttyAMA0,..) where N
is number that particular UART instance.
This field will be useful when printing debug info for a particular port
or in register IRQs with unique IRQ name. Port name is populated during
uart_add_one_port().

Signed-off-by: Vignesh R 
Reviewed-by: Andy Shevchenko 
Signed-off-by: Greg Kroah-Hartman

serial: do not accept sysrq characters via serial port

2017-01-12T10:51:24+00:00

many embedded boards have a disconnected TTL level serial which can
generate some garbage that can lead to spurious false sysrq detects.

Signed-off-by: John Crispin 
Signed-off-by: Felix Fietkau 
Signed-off-by: Greg Kroah-Hartman

linux: drop bitwise everywhere

2016-12-15T22:13:41+00:00

__bitwise__ used to mean "yes, please enable sparse checks
unconditionally", but now that we dropped __CHECK_ENDIAN__
__bitwise is exactly the same.
There aren't many users, replace it by __bitwise everywhere.

Signed-off-by: Michael S. Tsirkin 
Acked-by: Greg Kroah-Hartman 
Acked-by: Stefan Schmidt 
Acked-by: Krzysztof Kozlowski 
Akced-by: Lee Duncan

serial: 8250: Expose set_ldisc function

2016-11-16T09:59:38+00:00

Expose set_ldisc() function so that it can be overridden with a
platform specific implementation.

Signed-off-by: Ed Blake 
Signed-off-by: Greg Kroah-Hartman

ACPI: parse SPCR and enable matching console

2016-09-28T15:46:46+00:00

'ARM Server Base Boot Requiremets' [1] mentions SPCR (Serial Port
Console Redirection Table) [2] as a mandatory ACPI table that
specifies the configuration of serial console.

Defer initialization of DT earlycon until ACPI/DT decision is made.

Parse the ACPI SPCR table, setup earlycon if required,
enable specified console.

Thanks to Peter Hurley for explaining how this should work.

[1] http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.den0044a/index.html
[2] https://msdn.microsoft.com/en-us/library/windows/hardware/dn639132(v=vs.85).aspx

Signed-off-by: Aleksey Makarov 
Acked-by: Rafael J. Wysocki 
Reviewed-by: Peter Hurley 
Tested-by: Kefeng Wang 
Tested-by: Christopher Covington 
Signed-off-by: Greg Kroah-Hartman

tty: serial_core: add tty NULL check to uart_tx_stopped

2016-09-15T10:37:09+00:00

Commit 761ed4a94582 ("tty: serial_core: convert uart_close to use
tty_port_close") created a case where a port used for a console does not
get shutdown on tty closing. Then a call to uart_tx_stopped() segfaults
because the tty is NULL. This could be fixed to restore old behavior,
but we also want to allow tty_ports to work without a tty attached. So
this change to allow a NULL tty_struct is needed either way.

Fixes: 761ed4a94582 ("tty: serial_core: convert uart_close to use tty_port_close")
Reported-by: kernel test robot 
Signed-off-by: Rob Herring 
Signed-off-by: Greg Kroah-Hartman