Merge tag 'tty-5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial driver updates from Greg KH:
 "Here are the big set of tty and serial driver changes for 5.18-rc1.

  Nothing major, some more good cleanups from Jiri and 2 new serial
  drivers. Highlights include:

   - termbits cleanups

   - export symbol cleanups and other core cleanups from Jiri Slaby

   - new sunplus and mvebu uart drivers (amazing that people are still
     creating new uarts...)

   - samsung serial driver cleanups

   - ldisc 29 is now "reserved" for experimental/development line
     disciplines

   - lots of other tiny fixes and cleanups to serial drivers and
     bindings

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

* tag 'tty-5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (104 commits)
  vt_ioctl: fix potential spectre v1 in VT_DISALLOCATE
  serial: 8250: fix XOFF/XON sending when DMA is used
  tty: serial: samsung: Add ARTPEC-8 support
  dt-bindings: serial: samsung: Add ARTPEC-8 UART
  serial: sc16is7xx: Clear RS485 bits in the shutdown
  tty: serial: samsung: simplify getting OF match data
  tty: serial: samsung: constify variables and pointers
  tty: serial: samsung: constify s3c24xx_serial_drv_data members
  tty: serial: samsung: constify UART name
  tty: serial: samsung: constify s3c24xx_serial_drv_data
  tty: serial: samsung: reduce number of casts
  tty: serial: samsung: embed s3c2410_uartcfg in parent structure
  tty: serial: samsung: embed s3c24xx_uart_info in parent structure
  serial: 8250_tegra: mark acpi_device_id as unused with !ACPI
  tty: serial: bcm63xx: use more precise Kconfig symbol
  serial: SERIAL_SUNPLUS should depend on ARCH_SUNPLUS
  tty: serial: jsm: fix two assignments in if conditions
  tty: serial: jsm: remove redundant assignments to variable linestatus
  serial: 8250_mtk: make two read-only arrays static const
  serial: samsung_tty: do not unlock port->lock for uart_write_wakeup()
  ...

8 files changed, 135 insertions, 11 deletions

diff --git a/Documentation/devicetree/bindings/clock/marvell,armada-3700-uart-clock.yaml b/Documentation/devicetree/bindings/clock/marvell,armada-3700-uart-clock.yaml
new file mode 100644
index 000000000000..175f5c8f2bc5
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/marvell,armada-3700-uart-clock.yaml
@@ -0,0 +1,59 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/marvell,armada-3700-uart-clock.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+title: Marvell Armada 3720 UART clocks
+
+maintainers:
+  - Pali Rohár <pali@kernel.org>
+
+properties:
+  compatible:
+    const: marvell,armada-3700-uart-clock
+
+  reg:
+    items:
+      - description: UART Clock Control Register
+      - description: UART 2 Baud Rate Divisor Register
+
+  clocks:
+    description: |
+      List of parent clocks suitable for UART from following set:
+        "TBG-A-P", "TBG-B-P", "TBG-A-S", "TBG-B-S", "xtal"
+      UART clock can use one from this set and when more are provided
+      then kernel would choose and configure the most suitable one.
+      It is suggest to specify at least one TBG clock to achieve
+      baudrates above 230400 and also to specify clock which bootloader
+      used for UART (most probably xtal) for smooth boot log on UART.
+
+  clock-names:
+    items:
+      - const: TBG-A-P
+      - const: TBG-B-P
+      - const: TBG-A-S
+      - const: TBG-B-S
+      - const: xtal
+    minItems: 1
+
+  '#clock-cells':
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - '#clock-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    uartclk: clock-controller@12010 {
+      compatible = "marvell,armada-3700-uart-clock";
+      reg = <0x12010 0x4>, <0x12210 0x4>;
+      clocks = <&tbg 0>, <&tbg 1>, <&tbg 2>, <&tbg 3>, <&xtalclk>;
+      clock-names = "TBG-A-P", "TBG-B-P", "TBG-A-S", "TBG-B-S", "xtal";
+      #clock-cells = <1>;
+    };
diff --git a/Documentation/devicetree/bindings/serial/fsl-lpuart.yaml b/Documentation/devicetree/bindings/serial/fsl-lpuart.yaml
index 6e04e3848261..ff364bd0fbac 100644
--- a/Documentation/devicetree/bindings/serial/fsl-lpuart.yaml
+++ b/Documentation/devicetree/bindings/serial/fsl-lpuart.yaml
@@ -20,15 +20,15 @@ properties:
           - fsl,ls1021a-lpuart
           - fsl,ls1028a-lpuart
           - fsl,imx7ulp-lpuart
-          - fsl,imx8qm-lpuart
+          - fsl,imx8qxp-lpuart
           - fsl,imxrt1050-lpuart
       - items:
-          - enum:
-              - fsl,imx8qxp-lpuart
-              - fsl,imx8ulp-lpuart
+          - const: fsl,imx8ulp-lpuart
           - const: fsl,imx7ulp-lpuart
       - items:
-          - const: fsl,imx8qm-lpuart
+          - enum:
+              - fsl,imx8qm-lpuart
+              - fsl,imx8dxl-lpuart
           - const: fsl,imx8qxp-lpuart
 
   reg:
diff --git a/Documentation/devicetree/bindings/serial/mtk-uart.txt b/Documentation/devicetree/bindings/serial/mtk-uart.txt
index b3a0bfef0d54..113b5d6a2245 100644
--- a/Documentation/devicetree/bindings/serial/mtk-uart.txt
+++ b/Documentation/devicetree/bindings/serial/mtk-uart.txt
@@ -20,6 +20,7 @@ Required properties:
   * "mediatek,mt8135-uart" for MT8135 compatible UARTS
   * "mediatek,mt8173-uart" for MT8173 compatible UARTS
   * "mediatek,mt8183-uart", "mediatek,mt6577-uart" for MT8183 compatible UARTS
+  * "mediatek,mt8186-uart", "mediatek,mt6577-uart" for MT8183 compatible UARTS
   * "mediatek,mt8192-uart", "mediatek,mt6577-uart" for MT8192 compatible UARTS
   * "mediatek,mt8195-uart", "mediatek,mt6577-uart" for MT8195 compatible UARTS
   * "mediatek,mt8516-uart" for MT8516 compatible UARTS
diff --git a/Documentation/devicetree/bindings/serial/mvebu-uart.txt b/Documentation/devicetree/bindings/serial/mvebu-uart.txt
index 2d0dbdf32d1d..a062bbca532c 100644
--- a/Documentation/devicetree/bindings/serial/mvebu-uart.txt
+++ b/Documentation/devicetree/bindings/serial/mvebu-uart.txt
@@ -14,7 +14,10 @@ Required properties:
       is provided (possible only with the "marvell,armada-3700-uart"
       compatible string for backward compatibility), it will only work
       if the baudrate was initialized by the bootloader and no baudrate
-      change will then be possible.
+      change will then be possible. When provided it should be UART1-clk
+      for standard variant of UART and UART2-clk for extended variant
+      of UART. TBG clock (with UART TBG divisors d1=d2=1) or xtal clock
+      should not be used and are supported only for backward compatibility.
 - interrupts:
     - Must contain three elements for the standard variant of the IP
       (marvell,armada-3700-uart): "uart-sum", "uart-tx" and "uart-rx",
@@ -34,7 +37,7 @@ Example:
 	uart0: serial@12000 {
 		compatible = "marvell,armada-3700-uart";
 		reg = <0x12000 0x18>;
-		clocks = <&xtalclk>;
+		clocks = <&uartclk 0>;
 		interrupts =
 		<GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>,
 		<GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>,
@@ -45,7 +48,7 @@ Example:
 	uart1: serial@12200 {
 		compatible = "marvell,armada-3700-uart-ext";
 		reg = <0x12200 0x30>;
-		clocks = <&xtalclk>;
+		clocks = <&uartclk 1>;
 		interrupts =
 		<GIC_SPI 30 IRQ_TYPE_EDGE_RISING>,
 		<GIC_SPI 31 IRQ_TYPE_EDGE_RISING>;
diff --git a/Documentation/devicetree/bindings/serial/renesas,sci.yaml b/Documentation/devicetree/bindings/serial/renesas,sci.yaml
index 8dda4e10e09d..bf7708a7a2c0 100644
--- a/Documentation/devicetree/bindings/serial/renesas,sci.yaml
+++ b/Documentation/devicetree/bindings/serial/renesas,sci.yaml
@@ -17,6 +17,7 @@ properties:
     oneOf:
       - items:
           - enum:
+              - renesas,r9a07g043-sci     # RZ/G2UL
               - renesas,r9a07g044-sci     # RZ/G2{L,LC}
               - renesas,r9a07g054-sci     # RZ/V2L
           - const: renesas,sci            # generic SCI compatible UART
@@ -67,6 +68,7 @@ if:
     compatible:
       contains:
         enum:
+          - renesas,r9a07g043-sci
           - renesas,r9a07g044-sci
           - renesas,r9a07g054-sci
 then:
diff --git a/Documentation/devicetree/bindings/serial/renesas,scif.yaml b/Documentation/devicetree/bindings/serial/renesas,scif.yaml
index ba5d3e0acc63..5d37f8f189fb 100644
--- a/Documentation/devicetree/bindings/serial/renesas,scif.yaml
+++ b/Documentation/devicetree/bindings/serial/renesas,scif.yaml
@@ -73,12 +73,12 @@ properties:
       - items:
           - enum:
               - renesas,scif-r9a07g044      # RZ/G2{L,LC}
-              - renesas,scif-r9a07g054      # RZ/V2L
 
       - items:
           - enum:
+              - renesas,scif-r9a07g043      # RZ/G2UL
               - renesas,scif-r9a07g054      # RZ/V2L
-          - const: renesas,scif-r9a07g044   # RZ/G2{L,LC} fallback for RZ/V2L
+          - const: renesas,scif-r9a07g044   # RZ/G2{L,LC} fallback
 
   reg:
     maxItems: 1
@@ -167,7 +167,6 @@ if:
           - renesas,rcar-gen3-scif
           - renesas,rcar-gen4-scif
           - renesas,scif-r9a07g044
-          - renesas,scif-r9a07g054
 then:
   required:
     - resets
diff --git a/Documentation/devicetree/bindings/serial/samsung_uart.yaml b/Documentation/devicetree/bindings/serial/samsung_uart.yaml
index 2940afb874b3..d4688e317fc5 100644
--- a/Documentation/devicetree/bindings/serial/samsung_uart.yaml
+++ b/Documentation/devicetree/bindings/serial/samsung_uart.yaml
@@ -20,12 +20,14 @@ properties:
     items:
       - enum:
           - apple,s5l-uart
+          - axis,artpec8-uart
           - samsung,s3c2410-uart
           - samsung,s3c2412-uart
           - samsung,s3c2440-uart
           - samsung,s3c6400-uart
           - samsung,s5pv210-uart
           - samsung,exynos4210-uart
+          - samsung,exynos5433-uart
           - samsung,exynos850-uart
 
   reg:
@@ -110,7 +112,9 @@ allOf:
           contains:
             enum:
               - apple,s5l-uart
+              - axis,artpec8-uart
               - samsung,exynos4210-uart
+              - samsung,exynos5433-uart
     then:
       properties:
         clocks:
diff --git a/Documentation/devicetree/bindings/serial/sunplus,sp7021-uart.yaml b/Documentation/devicetree/bindings/serial/sunplus,sp7021-uart.yaml
new file mode 100644
index 000000000000..2e9b64abde70
--- /dev/null
+++ b/Documentation/devicetree/bindings/serial/sunplus,sp7021-uart.yaml
@@ -0,0 +1,56 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (C) Sunplus Co., Ltd. 2021
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/serial/sunplus,sp7021-uart.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Sunplus SoC SP7021 UART Controller Device Tree Bindings
+
+maintainers:
+  - Hammer Hsieh <hammerh0314@gmail.com>
+
+allOf:
+  - $ref: serial.yaml#
+
+properties:
+  compatible:
+    const: sunplus,sp7021-uart
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - resets
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    aliases {
+        serial0 = &uart0;
+    };
+
+    uart0: serial@9c000900 {
+        compatible = "sunplus,sp7021-uart";
+        reg = <0x9c000900 0x80>;
+        interrupt-parent = <&intc>;
+        interrupts = <53 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&clkc 0x28>;
+        resets = <&rstc 0x18>;
+    };
+...