Merge tag 'tty-6.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty / serial updates from Greg KH:
 "Here is the big set of tty and serial driver changes for 6.8-rc1.

  As usual, Jiri has a bunch of refactoring and cleanups for the tty
  core and drivers in here, along with the usual set of rs485 updates
  (someday this might work properly...)

  Along with those, in here are changes for:

   - sc16is7xx serial driver updates

   - platform driver removal api updates

   - amba-pl011 driver updates

   - tty driver binding updates

   - other small tty/serial driver updates and changes

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

* tag 'tty-6.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (197 commits)
  serial: sc16is7xx: refactor EFR lock
  serial: sc16is7xx: reorder code to remove prototype declarations
  serial: sc16is7xx: refactor FIFO access functions to increase commonality
  serial: sc16is7xx: drop unneeded MODULE_ALIAS
  serial: sc16is7xx: replace hardcoded divisor value with BIT() macro
  serial: sc16is7xx: add explicit return for some switch default cases
  serial: sc16is7xx: add macro for max number of UART ports
  serial: sc16is7xx: add driver name to struct uart_driver
  serial: sc16is7xx: use i2c_get_match_data()
  serial: sc16is7xx: use spi_get_device_match_data()
  serial: sc16is7xx: use DECLARE_BITMAP for sc16is7xx_lines bitfield
  serial: sc16is7xx: improve do/while loop in sc16is7xx_irq()
  serial: sc16is7xx: remove obsolete loop in sc16is7xx_port_irq()
  serial: sc16is7xx: set safe default SPI clock frequency
  serial: sc16is7xx: add check for unsupported SPI modes during probe
  serial: sc16is7xx: fix invalid sc16is7xx_lines bitfield in case of probe error
  serial: 8250_exar: Set missing rs485_supported flag
  serial: omap: do not override settings for RS485 support
  serial: core, imx: do not set RS485 enabled if it is not supported
  serial: core: make sure RS485 cannot be enabled when it is not supported
  ...

Author: torvalds

Documentation/admin-guide/devices.txt

@@ -2704,6 +2704,9 @@
 		    ...
 		 185 = /dev/ttyNX15		Hilscher netX serial port 15
 		 186 = /dev/ttyJ0		JTAG1 DCC protocol based serial port emulation
+
+		 If maximum number of uartlite serial ports is more than 4, then the driver
+		 uses dynamic allocation instead of static allocation for major number.
 		 187 = /dev/ttyUL0		Xilinx uartlite - port 0
 		    ...
 		 190 = /dev/ttyUL3		Xilinx uartlite - port 3

Documentation/admin-guide/sysrq.rst

@@ -75,10 +75,19 @@ On other
 	submit a patch to be included in this section.
 
 On all
-	Write a character to /proc/sysrq-trigger.  e.g.::
+	Write a single character to /proc/sysrq-trigger.
+	Only the first character is processed, the rest of the string is
+	ignored. However, it is not recommended to write any extra characters
+	as the behavior is undefined and might change in the future versions.
+	E.g.::
 
 		echo t > /proc/sysrq-trigger
 
+	Alternatively, write multiple characters prepended by underscore.
+	This way, all characters will be processed. E.g.::
+
+		echo _reisub > /proc/sysrq-trigger
+
 The :kbd:`<command key>` is case sensitive.
 
 What are the 'command' keys?

Documentation/devicetree/bindings/serial/arm,dcc.yaml

@@ -0,0 +1,30 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/serial/arm,dcc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ARM DCC (Data communication channel) serial emulation
+
+maintainers:
+  - Michal Simek <michal.simek@amd.com>
+
+description: |
+  ARM DCC (Data communication channel) serial emulation interface available
+  via JTAG can be also used as one of serial line tightly coupled with every
+  ARM CPU available in the system.
+
+properties:
+  compatible:
+    const: arm,dcc
+
+required:
+  - compatible
+
+additionalProperties: false
+
+examples:
+  - |
+    serial {
+      compatible = "arm,dcc";
+    };

Documentation/devicetree/bindings/serial/fsl,s32-linflexuart.yaml

@@ -13,7 +13,7 @@ description: |
   https://www.nxp.com/webapp/Download?colCode=S32V234RM.
 
 maintainers:
-  - Chester Lin <clin@suse.com>
+  - Chester Lin <chester62515@gmail.com>
 
 allOf:
   - $ref: serial.yaml#

Documentation/devicetree/bindings/serial/fsl-imx-uart.yaml

@@ -9,10 +9,6 @@ title: Freescale i.MX Universal Asynchronous Receiver/Transmitter (UART)
 maintainers:
   - Fabio Estevam <festevam@gmail.com>
 
-allOf:
-  - $ref: serial.yaml#
-  - $ref: rs485.yaml#
-
 properties:
   compatible:
     oneOf:
@@ -68,7 +64,11 @@ properties:
       - const: tx
 
   interrupts:
-    maxItems: 1
+    items:
+      - description: UART RX Interrupt
+      - description: UART TX Interrupt
+      - description: UART RTS Interrupt
+    minItems: 1
 
   wakeup-source: true
 
@@ -110,6 +110,25 @@ required:
   - clock-names
   - interrupts
 
+allOf:
+  - $ref: serial.yaml#
+  - $ref: rs485.yaml#
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: fsl,imx1-uart
+    then:
+      properties:
+        interrupts:
+          minItems: 3
+          maxItems: 3
+    else:
+      properties:
+        interrupts:
+          maxItems: 1
+
 unevaluatedProperties: false
 
 examples:

Documentation/devicetree/bindings/serial/qcom,msm-uartdm.yaml

@@ -48,9 +48,17 @@ properties:
       - const: tx
       - const: rx
 
+  interconnects:
+    maxItems: 1
+
   interrupts:
     maxItems: 1
 
+  operating-points-v2: true
+
+  power-domains:
+    maxItems: 1
+
   qcom,rx-crci:
     $ref: /schemas/types.yaml#/definitions/uint32
     description:
@@ -99,7 +107,9 @@ unevaluatedProperties: false
 
 examples:
   - |
+    #include <dt-bindings/interconnect/qcom,msm8996.h>
     #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/power/qcom-rpmpd.h>
 
     serial@f991e000 {
         compatible = "qcom,msm-uartdm-v1.4", "qcom,msm-uartdm";
@@ -109,4 +119,7 @@ examples:
         clock-names = "core", "iface";
         dmas = <&dma0 0>, <&dma0 1>;
         dma-names = "tx", "rx";
+        power-domains = <&rpmpd MSM8996_VDDCX>;
+        operating-points-v2 = <&uart_opp_table>;
+        interconnects = <&pnoc MASTER_BLSP_1 &bimc SLAVE_EBI_CH0>;
     };

Documentation/devicetree/bindings/serial/renesas,sci.yaml

@@ -17,7 +17,7 @@ properties:
     oneOf:
       - items:
           - enum:
-              - renesas,r9a07g043-sci     # RZ/G2UL
+              - renesas,r9a07g043-sci     # RZ/G2UL and RZ/Five
               - renesas,r9a07g044-sci     # RZ/G2{L,LC}
               - renesas,r9a07g054-sci     # RZ/V2L
           - const: renesas,sci            # generic SCI compatible UART

Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml

@@ -11,6 +11,7 @@ maintainers:
 
 allOf:
   - $ref: serial.yaml#
+  - $ref: rs485.yaml#
 
 properties:
   compatible:

Documentation/devicetree/bindings/serial/sprd-uart.yaml

@@ -20,6 +20,7 @@ properties:
               - sprd,sc9860-uart
               - sprd,sc9863a-uart
               - sprd,ums512-uart
+              - sprd,ums9620-uart
           - const: sprd,sc9836-uart
       - const: sprd,sc9836-uart
 

MAINTAINERS

@@ -23185,7 +23185,6 @@ M:	Amit Shah <amit@kernel.org>
 L:	virtualization@lists.linux.dev
 S:	Maintained
 F:	drivers/char/virtio_console.c
-F:	include/linux/virtio_console.h
 F:	include/uapi/linux/virtio_console.h
 
 VIRTIO CORE AND NET DRIVERS