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
  ...

5 files changed, 35 insertions, 5 deletions

diff --git a/Documentation/admin-guide/sysrq.rst b/Documentation/admin-guide/sysrq.rst
index a46209f4636c..e6424d8c5846 100644
--- a/Documentation/admin-guide/sysrq.rst
+++ b/Documentation/admin-guide/sysrq.rst
@@ -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
diff --git a/Documentation/devicetree/bindings/serial/nxp,sc16is7xx.txt b/Documentation/devicetree/bindings/serial/nxp,sc16is7xx.txt
index c1091a923a89..0fa8e3e43bf8 100644
--- a/Documentation/devicetree/bindings/serial/nxp,sc16is7xx.txt
+++ b/Documentation/devicetree/bindings/serial/nxp,sc16is7xx.txt
@@ -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 {
diff --git a/Documentation/devicetree/bindings/serial/rs485.yaml b/Documentation/devicetree/bindings/serial/rs485.yaml
index 8141e4aad530..fe90569475e1 100644
--- a/Documentation/devicetree/bindings/serial/rs485.yaml
+++ b/Documentation/devicetree/bindings/serial/rs485.yaml
@@ -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
 ...
diff --git a/Documentation/devicetree/bindings/serial/samsung_uart.yaml b/Documentation/devicetree/bindings/serial/samsung_uart.yaml
index ff2f49fe322c..32a5e1e30833 100644
--- a/Documentation/devicetree/bindings/serial/samsung_uart.yaml
+++ b/Documentation/devicetree/bindings/serial/samsung_uart.yaml
@@ -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
diff --git a/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml b/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml
index 238c44192d31..75b8521eb7cb 100644
--- a/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml
+++ b/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml
@@ -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