Commit 081096d9 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'tty-5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty 

Pull tty/serial driver updates from Greg KH:
 "Here is the tty and serial driver updates for 5.8-rc1

  Nothing huge at all, just a lot of little serial driver fixes, updates
  for new devices and features, and other small things. Full details are
  in the shortlog.

  All of these have been in linux-next with no issues for a while"

* tag 'tty-5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (67 commits)
  tty: serial: qcom_geni_serial: Add 51.2MHz frequency support
  tty: serial: imx: clear Ageing Timer Interrupt in handler
  serial: 8250_fintek: Add F81966 Support
  sc16is7xx: Add flag to activate IrDA mode
  dt-bindings: sc16is7xx: Add flag to activate IrDA mode
  serial: 8250: Support rs485 bus termination GPIO
  serial: 8520_port: Fix function param documentation
  dt-bindings: serial: Add binding for rs485 bus termination GPIO
  vt: keyboard: avoid signed integer overflow in k_ascii
  serial: 8250: Enable 16550A variants by default on non-x86
  tty: hvc_console, fix crashes on parallel open/close
  serial: imx: Initialize lock for non-registered console
  sc16is7xx: Read the LSR register for basic device presence check
  sc16is7xx: Allow sharing the IRQ line
  sc16is7xx: Use threaded IRQ
  sc16is7xx: Always use falling edge IRQ
  tty: n_gsm: Fix bogus i++ in gsm_data_kick
  tty: n_gsm: Remove unnecessary test in gsm_print_packet()
  serial: stm32: add no_console_suspend support
  tty: serial: fsl_lpuart: Use __maybe_unused instead of #if CONFIG_PM_SLEEP
  ...
parents e611c0fe a1b44ea3

Documentation/admin-guide/sysrq.rst

+5 −5
Original line number Diff line number Diff line
@@ -231,13 +231,13 @@ prints help, and C) an action_msg string, that will print right before your 
handler is called. Your handler must conform to the prototype in 'sysrq.h'.



After the ``sysrq_key_op`` is created, you can call the kernel function

``register_sysrq_key(int key, struct sysrq_key_op *op_p);`` this will

``register_sysrq_key(int key, const struct sysrq_key_op *op_p);`` this will

register the operation pointed to by ``op_p`` at table key 'key',

if that slot in the table is blank. At module unload time, you must call

the function ``unregister_sysrq_key(int key, struct sysrq_key_op *op_p)``, which

will remove the key op pointed to by 'op_p' from the key 'key', if and only if

it is currently registered in that slot. This is in case the slot has been

overwritten since you registered it.

the function ``unregister_sysrq_key(int key, const struct sysrq_key_op *op_p)``,

which will remove the key op pointed to by 'op_p' from the key 'key', if and

only if it is currently registered in that slot. This is in case the slot has

been overwritten since you registered it.



The Magic SysRQ system works by registering key operations against a key op

lookup table, which is defined in 'drivers/tty/sysrq.c'. This key table has

Documentation/devicetree/bindings/serial/nxp,sc16is7xx.txt

+4 −0
Original line number Diff line number Diff line
@@ -21,6 +21,8 @@ Optional properties: 
  the second cell is used to specify the GPIO polarity:

    0 = active high,

    1 = active low.

- irda-mode-ports: An array that lists the indices of the port that

		   should operate in IrDA mode.



Example:

        sc16is750: sc16is750@51 {
@@ -55,6 +57,8 @@ Optional properties: 
  the second cell is used to specify the GPIO polarity:

    0 = active high,

    1 = active low.

- irda-mode-ports: An array that lists the indices of the port that

		   should operate in IrDA mode.



Example:

	sc16is750: sc16is750@0 {

Documentation/devicetree/bindings/serial/rs485.yaml

+4 −0
Original line number Diff line number Diff line
@@ -41,4 +41,8 @@ properties: 
  rs485-rx-during-tx:

    description: enables the receiving of data even while sending data.

    $ref: /schemas/types.yaml#/definitions/flag



  rs485-term-gpios:

    description: GPIO pin to enable RS485 bus termination.

    maxItems: 1

...

Documentation/devicetree/bindings/serial/samsung_uart.yaml

+8 −0
Original line number Diff line number Diff line
@@ -29,6 +29,14 @@ properties: 
  reg:

    maxItems: 1



  reg-io-width:

    description: |

      The size (in bytes) of the IO accesses that should be performed

      on the device.

    allOf:

      - $ref: /schemas/types.yaml#/definitions/uint32

      - enum: [ 1, 4 ]



  clocks:

    minItems: 2

    maxItems: 5

Documentation/devicetree/bindings/serial/st,stm32-uart.yaml

+14 −0
Original line number Diff line number Diff line
@@ -48,6 +48,12 @@ properties: 
    minItems: 1

    maxItems: 2



  cts-gpios:

    maxItems: 1



  rts-gpios:

    maxItems: 1



  wakeup-source: true



  rs485-rts-delay: true
@@ -55,6 +61,14 @@ properties: 
  linux,rs485-enabled-at-boot-time: true

  rs485-rx-during-tx: true



if:

  required:

    - st,hw-flow-ctrl

then:

  properties:

    cts-gpios: false

    rts-gpios: false



required:

  - compatible

  - reg

CRA Git | Maintained and supported by SUSTech CRA and CCSE