talos-obmc-linux/include/linux/serial_core.h, branch dev-4.13-fsi

serial: Introduce UPSTAT_SYNC_FIFO for synchronised FIFOs

2018-04-05T13:18:49+00:00

This change adds a flag to indicate that a UART is has an external means of synchronising its FIFO, without needing CTSRTS or XON/XOFF. This allows us to use the throttle/unthrottle callbacks, without having to claim other methods of flow control. OpenBMC-Staging-Count: 1 Signed-off-by: Jeremy Kerr Tested-by: Eddie James Signed-off-by: Andrew Jeffery

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

serial: earlycon: Extend earlycon command line option to support 64-bit addresses

2016-09-02T13:03:35+00:00

earlycon implementation used "unsigned long" internally, but there are systems (ARM with LPAE) where sizeof(unsigned long) == 4 and uart is mapped beyond 4GiB address range. Switch to resource_size_t internally and replace obsoleted simple_strtoul() with kstrtoull(). Signed-off-by: Alexander Sverdlin Signed-off-by: Greg Kroah-Hartman