Merge tag 'tty-6.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty / serial driver updates from Greg KH:
 "Here is the big set of tty and serial driver changes for 6.0-rc1.

  It was delayed from last week as I wanted to make sure the last commit
  here got some good testing in linux-next and elsewhere as it seemed to
  show up only late in testing for some reason.

  Nothing major here, just lots of cleanups from Jiri and Ilpo to make
  the tty core cleaner (Jiri) and the rs485 code simpler to use (Ilpo).

  Also included in here is the obligatory n_gsm updates from Daniel
  Starke and lots of tiny driver updates and minor fixes and tweaks for
  other smaller serial drivers.

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

* tag 'tty-6.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (186 commits)
  tty: serial: qcom-geni-serial: Fix %lu -> %u in print statements
  tty: amiserial: Fix comment typo
  tty: serial: document uart_get_console()
  tty: serial: serial_core, reformat kernel-doc for functions
  Documentation: serial: link uart_ops properly
  Documentation: serial: move GPIO kernel-doc to the functions
  Documentation: serial: dedup kernel-doc for uart functions
  Documentation: serial: move uart_ops documentation to the struct
  dt-bindings: serial: snps-dw-apb-uart: Document Rockchip RV1126
  serial: mvebu-uart: uart2 error bits clearing
  tty: serial: fsl_lpuart: correct the count of break characters
  serial: stm32: make info structs static to avoid sparse warnings
  serial: fsl_lpuart: zero out parity bit in CS7 mode
  tty: serial: qcom-geni-serial: Fix get_clk_div_rate() which otherwise could return a sub-optimal clock rate.
  serial: 8250_bcm2835aux: Add missing clk_disable_unprepare()
  tty: vt: initialize unicode screen buffer
  serial: remove VR41XX serial driver
  serial: 8250: lpc18xx: Remove redundant sanity check for RS485 flags
  serial: 8250_dwlib: remove redundant sanity check for RS485 flags
  dt_bindings: rs485: Correct delay values
  ...

6 files changed, 126 insertions, 61 deletions

diff --git a/Documentation/devicetree/bindings/serial/8250.yaml b/Documentation/devicetree/bindings/serial/8250.yaml
index 5f6b113d378f..6258f5f59b19 100644
--- a/Documentation/devicetree/bindings/serial/8250.yaml
+++ b/Documentation/devicetree/bindings/serial/8250.yaml
@@ -62,6 +62,7 @@ properties:
       - const: mrvl,pxa-uart
       - const: nuvoton,wpcm450-uart
       - const: nuvoton,npcm750-uart
+      - const: nuvoton,npcm845-uart
       - const: nvidia,tegra20-uart
       - const: nxp,lpc3220-uart
       - items:
diff --git a/Documentation/devicetree/bindings/serial/mediatek,uart.yaml b/Documentation/devicetree/bindings/serial/mediatek,uart.yaml
new file mode 100644
index 000000000000..4ff27d6d4d5b
--- /dev/null
+++ b/Documentation/devicetree/bindings/serial/mediatek,uart.yaml
@@ -0,0 +1,120 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/serial/mediatek,uart.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek Universal Asynchronous Receiver/Transmitter (UART)
+
+maintainers:
+  - Matthias Brugger <matthias.bgg@gmail.com>
+
+allOf:
+  - $ref: serial.yaml#
+
+description: |
+  The MediaTek UART is based on the basic 8250 UART and compatible
+  with 16550A, with enhancements for high speed baud rates and
+  support for DMA.
+
+properties:
+  compatible:
+    oneOf:
+      - const: mediatek,mt6577-uart
+      - items:
+          - enum:
+              - mediatek,mt2701-uart
+              - mediatek,mt2712-uart
+              - mediatek,mt6580-uart
+              - mediatek,mt6582-uart
+              - mediatek,mt6589-uart
+              - mediatek,mt6755-uart
+              - mediatek,mt6765-uart
+              - mediatek,mt6779-uart
+              - mediatek,mt6795-uart
+              - mediatek,mt6797-uart
+              - mediatek,mt7622-uart
+              - mediatek,mt7623-uart
+              - mediatek,mt7629-uart
+              - mediatek,mt7986-uart
+              - mediatek,mt8127-uart
+              - mediatek,mt8135-uart
+              - mediatek,mt8173-uart
+              - mediatek,mt8183-uart
+              - mediatek,mt8186-uart
+              - mediatek,mt8192-uart
+              - mediatek,mt8195-uart
+              - mediatek,mt8516-uart
+          - const: mediatek,mt6577-uart
+
+  reg:
+    description: The base address of the UART register bank
+    maxItems: 1
+
+  clocks:
+    minItems: 1
+    items:
+      - description: The clock the baudrate is derived from
+      - description: The bus clock for register accesses
+
+  clock-names:
+    minItems: 1
+    items:
+      - const: baud
+      - const: bus
+
+  dmas:
+    items:
+      - description: phandle to TX DMA
+      - description: phandle to RX DMA
+
+  dma-names:
+    items:
+      - const: tx
+      - const: rx
+
+  interrupts:
+    minItems: 1
+    maxItems: 2
+
+  interrupt-names:
+    description:
+      The UART interrupt and optionally the RX in-band wakeup interrupt.
+    minItems: 1
+    items:
+      - const: uart
+      - const: wakeup
+
+  pinctrl-0: true
+  pinctrl-1: true
+
+  pinctrl-names:
+    minItems: 1
+    items:
+      - const: default
+      - const: sleep
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - interrupts
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    serial@11006000 {
+        compatible = "mediatek,mt6589-uart", "mediatek,mt6577-uart";
+        reg = <0x11006000 0x400>;
+        interrupts = <GIC_SPI 51 IRQ_TYPE_LEVEL_LOW>,
+                     <GIC_SPI 52 IRQ_TYPE_EDGE_FALLING>;
+        interrupt-names = "uart", "wakeup";
+        clocks = <&uart_clk>, <&bus_clk>;
+        clock-names = "baud", "bus";
+        pinctrl-0 = <&uart_pin>;
+        pinctrl-1 = <&uart_pin_sleep>;
+        pinctrl-names = "default", "sleep";
+    };
diff --git a/Documentation/devicetree/bindings/serial/mtk-uart.txt b/Documentation/devicetree/bindings/serial/mtk-uart.txt
deleted file mode 100644
index 113b5d6a2245..000000000000
--- a/Documentation/devicetree/bindings/serial/mtk-uart.txt
+++ /dev/null
@@ -1,59 +0,0 @@
-* MediaTek Universal Asynchronous Receiver/Transmitter (UART)
-
-Required properties:
-- compatible should contain:
-  * "mediatek,mt2701-uart" for MT2701 compatible UARTS
-  * "mediatek,mt2712-uart" for MT2712 compatible UARTS
-  * "mediatek,mt6580-uart" for MT6580 compatible UARTS
-  * "mediatek,mt6582-uart" for MT6582 compatible UARTS
-  * "mediatek,mt6589-uart" for MT6589 compatible UARTS
-  * "mediatek,mt6755-uart" for MT6755 compatible UARTS
-  * "mediatek,mt6765-uart" for MT6765 compatible UARTS
-  * "mediatek,mt6779-uart" for MT6779 compatible UARTS
-  * "mediatek,mt6795-uart" for MT6795 compatible UARTS
-  * "mediatek,mt6797-uart" for MT6797 compatible UARTS
-  * "mediatek,mt7622-uart" for MT7622 compatible UARTS
-  * "mediatek,mt7623-uart" for MT7623 compatible UARTS
-  * "mediatek,mt7629-uart" for MT7629 compatible UARTS
-  * "mediatek,mt7986-uart", "mediatek,mt6577-uart" for MT7986 compatible UARTS
-  * "mediatek,mt8127-uart" for MT8127 compatible UARTS
-  * "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
-  * "mediatek,mt6577-uart" for MT6577 and all of the above
-
-- reg: The base address of the UART register bank.
-
-- interrupts:
-  index 0: an interrupt specifier for the UART controller itself
-  index 1: optional, an interrupt specifier with edge sensitivity on Rx pin to
-           support Rx in-band wake up. If one would like to use this feature,
-           one must create an addtional pinctrl to reconfigure Rx pin to normal
-           GPIO before suspend.
-
-- clocks : Must contain an entry for each entry in clock-names.
-  See ../clocks/clock-bindings.txt for details.
-- clock-names:
-  - "baud": The clock the baudrate is derived from
-  - "bus": The bus clock for register accesses (optional)
-
-For compatibility with older device trees an unnamed clock is used for the
-baud clock if the baudclk does not exist. Do not use this for new designs.
-
-Example:
-
-	uart0: serial@11006000 {
-		compatible = "mediatek,mt6589-uart", "mediatek,mt6577-uart";
-		reg = <0x11006000 0x400>;
-		interrupts = <GIC_SPI 51 IRQ_TYPE_LEVEL_LOW>,
-			     <GIC_SPI 52 IRQ_TYPE_EDGE_FALLING>;
-		clocks = <&uart_clk>, <&bus_clk>;
-		clock-names = "baud", "bus";
-		pinctrl-names = "default", "sleep";
-		pinctrl-0 = <&uart_pin>;
-		pinctrl-1 = <&uart_pin_sleep>;
-	};
diff --git a/Documentation/devicetree/bindings/serial/renesas,hscif.yaml b/Documentation/devicetree/bindings/serial/renesas,hscif.yaml
index 87180d95cd4c..1957b9d782e8 100644
--- a/Documentation/devicetree/bindings/serial/renesas,hscif.yaml
+++ b/Documentation/devicetree/bindings/serial/renesas,hscif.yaml
@@ -57,6 +57,7 @@ properties:
       - items:
           - enum:
               - renesas,hscif-r8a779a0     # R-Car V3U
+              - renesas,hscif-r8a779f0     # R-Car S4-8
               - renesas,hscif-r8a779g0     # R-Car V4H
           - const: renesas,rcar-gen4-hscif # R-Car Gen4
           - const: renesas,hscif           # generic HSCIF compatible UART
diff --git a/Documentation/devicetree/bindings/serial/rs485.yaml b/Documentation/devicetree/bindings/serial/rs485.yaml
index f2c9c9fe6aa7..90a1bab40f05 100644
--- a/Documentation/devicetree/bindings/serial/rs485.yaml
+++ b/Documentation/devicetree/bindings/serial/rs485.yaml
@@ -22,12 +22,12 @@ properties:
         - description: Delay between rts signal and beginning of data sent in
             milliseconds. It corresponds to the delay before sending data.
           default: 0
-          maximum: 1000
+          maximum: 100
         - description: Delay between end of data sent and rts signal in milliseconds.
             It corresponds to the delay after sending data and actual release
             of the line.
           default: 0
-          maximum: 1000
+          maximum: 100
 
   rs485-rts-active-low:
     description: drive RTS low when sending (default is high).
diff --git a/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml b/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml
index 12137fe80acf..dc74643ae72e 100644
--- a/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml
+++ b/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml
@@ -33,7 +33,9 @@ properties:
               - rockchip,rk3368-uart
               - rockchip,rk3399-uart
               - rockchip,rk3568-uart
+              - rockchip,rk3588-uart
               - rockchip,rv1108-uart
+              - rockchip,rv1126-uart
           - const: snps,dw-apb-uart
       - items:
           - enum: