Merge tag 'tty-6.1-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 updates for 6.1-rc1.

  Lots of cleanups in here, no real new functionality this time around,
  with the diffstat being that we removed more lines than we added!

  Included in here are:

   - termios unification cleanups from Al Viro, it's nice to finally get
     this work done

   - tty serial transmit cleanups in various drivers in preparation for
     more cleanup and unification in future releases (that work was not
     ready for this release)

   - n_gsm fixes and updates

   - ktermios cleanups and code reductions

   - dt bindings json conversions and updates for new devices

   - some serial driver updates for new devices

   - lots of other tiny cleanups and janitorial stuff. Full details in
     the shortlog.

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

* tag 'tty-6.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (102 commits)
  serial: cpm_uart: Don't request IRQ too early for console port
  tty: serial: do unlock on a common path in altera_jtaguart_console_putc()
  tty: serial: unify TX space reads under altera_jtaguart_tx_space()
  tty: serial: use FIELD_GET() in lqasc_tx_ready()
  tty: serial: extend lqasc_tx_ready() to lqasc_console_putchar()
  tty: serial: allow pxa.c to be COMPILE_TESTed
  serial: stm32: Fix unused-variable warning
  tty: serial: atmel: Add COMMON_CLK dependency to SERIAL_ATMEL
  serial: 8250: Fix restoring termios speed after suspend
  serial: Deassert Transmit Enable on probe in driver-specific way
  serial: 8250_dma: Convert to use uart_xmit_advance()
  serial: 8250_omap: Convert to use uart_xmit_advance()
  MAINTAINERS: Solve warning regarding inexistent atmel-usart binding
  serial: stm32: Deassert Transmit Enable on ->rs485_config()
  serial: ar933x: Deassert Transmit Enable on ->rs485_config()
  tty: serial: atmel: Use FIELD_PREP/FIELD_GET
  tty: serial: atmel: Make the driver aware of the existence of GCLK
  tty: serial: atmel: Only divide Clock Divisor if the IP is USART
  tty: serial: atmel: Separate mode clearing between UART and USART
  dt-bindings: serial: atmel,at91-usart: Add gclk as a possible USART clock
  ...

7 files changed, 202 insertions, 100 deletions

diff --git a/Documentation/devicetree/bindings/mfd/atmel-usart.txt b/Documentation/devicetree/bindings/mfd/atmel-usart.txt
deleted file mode 100644
index a09133066aff..000000000000
--- a/Documentation/devicetree/bindings/mfd/atmel-usart.txt
+++ /dev/null
@@ -1,98 +0,0 @@
-* Atmel Universal Synchronous Asynchronous Receiver/Transmitter (USART)
-
-Required properties for USART:
-- compatible: Should be one of the following:
-	- "atmel,at91rm9200-usart"
-	- "atmel,at91sam9260-usart"
-	- "microchip,sam9x60-usart"
-	- "atmel,at91rm9200-dbgu", "atmel,at91rm9200-usart"
-	- "atmel,at91sam9260-dbgu", "atmel,at91sam9260-usart"
-	- "microchip,sam9x60-dbgu", "microchip,sam9x60-usart"
-- reg: Should contain registers location and length
-- interrupts: Should contain interrupt
-- clock-names: tuple listing input clock names.
-	Required elements: "usart"
-- clocks: phandles to input clocks.
-
-Required properties for USART in SPI mode:
-- #size-cells      : Must be <0>
-- #address-cells   : Must be <1>
-- cs-gpios: chipselects (internal cs not supported)
-- atmel,usart-mode : Must be <AT91_USART_MODE_SPI> (found in dt-bindings/mfd/at91-usart.h)
-
-Optional properties in serial and SPI mode:
-- dma bindings for dma transfer:
-	- dmas: DMA specifier, consisting of a phandle to DMA controller node,
-		memory peripheral interface and USART DMA channel ID, FIFO configuration.
-		The order of DMA channels is fixed. The first DMA channel must be TX
-		associated channel and the second one must be RX associated channel.
-		Refer to dma.txt and atmel-dma.txt for details.
-	- dma-names: "tx" for TX channel.
-		     "rx" for RX channel.
-		     The order of dma-names is also fixed. The first name must be "tx"
-		     and the second one must be "rx" as in the examples below.
-
-Optional properties in serial mode:
-- atmel,use-dma-rx: use of PDC or DMA for receiving data
-- atmel,use-dma-tx: use of PDC or DMA for transmitting data
-- {rts,cts,dtr,dsr,rng,dcd}-gpios: specify a GPIO for RTS/CTS/DTR/DSR/RI/DCD line respectively.
-  It will use specified PIO instead of the peripheral function pin for the USART feature.
-  If unsure, don't specify this property.
-- atmel,fifo-size: maximum number of data the RX and TX FIFOs can store for FIFO
-  capable USARTs.
-- rs485-rts-delay, rs485-rx-during-tx, linux,rs485-enabled-at-boot-time: see rs485.txt
-
-<chip> compatible description:
-- at91rm9200:  legacy USART support
-- at91sam9260: generic USART implementation for SAM9 SoCs
-
-Example:
-- use PDC:
-	usart0: serial@fff8c000 {
-		compatible = "atmel,at91sam9260-usart";
-		reg = <0xfff8c000 0x4000>;
-		interrupts = <7>;
-		clocks = <&usart0_clk>;
-		clock-names = "usart";
-		atmel,use-dma-rx;
-		atmel,use-dma-tx;
-		rts-gpios = <&pioD 15 GPIO_ACTIVE_LOW>;
-		cts-gpios = <&pioD 16 GPIO_ACTIVE_LOW>;
-		dtr-gpios = <&pioD 17 GPIO_ACTIVE_LOW>;
-		dsr-gpios = <&pioD 18 GPIO_ACTIVE_LOW>;
-		dcd-gpios = <&pioD 20 GPIO_ACTIVE_LOW>;
-		rng-gpios = <&pioD 19 GPIO_ACTIVE_LOW>;
-	};
-
-- use DMA:
-	usart0: serial@f001c000 {
-		compatible = "atmel,at91sam9260-usart";
-		reg = <0xf001c000 0x100>;
-		interrupts = <12 4 5>;
-		clocks = <&usart0_clk>;
-		clock-names = "usart";
-		atmel,use-dma-rx;
-		atmel,use-dma-tx;
-		dmas = <&dma0 2 0x3>,
-		       <&dma0 2 0x204>;
-		dma-names = "tx", "rx";
-		atmel,fifo-size = <32>;
-	};
-
-- SPI mode:
-	#include <dt-bindings/mfd/at91-usart.h>
-
-	spi0: spi@f001c000 {
-		#address-cells = <1>;
-		#size-cells = <0>;
-		compatible = "atmel,at91rm9200-usart", "atmel,at91sam9260-usart";
-		atmel,usart-mode = <AT91_USART_MODE_SPI>;
-		reg = <0xf001c000 0x100>;
-		interrupts = <12 IRQ_TYPE_LEVEL_HIGH 5>;
-		clocks = <&usart0_clk>;
-		clock-names = "usart";
-		dmas = <&dma0 2 AT91_DMA_CFG_PER_ID(3)>,
-		       <&dma0 2 (AT91_DMA_CFG_PER_ID(4) | AT91_DMA_CFG_FIFOCFG_ASAP)>;
-		dma-names = "tx", "rx";
-		cs-gpios = <&pioB 3 0>;
-	};
diff --git a/Documentation/devicetree/bindings/serial/atmel,at91-usart.yaml b/Documentation/devicetree/bindings/serial/atmel,at91-usart.yaml
new file mode 100644
index 000000000000..30b2131b5860
--- /dev/null
+++ b/Documentation/devicetree/bindings/serial/atmel,at91-usart.yaml
@@ -0,0 +1,190 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (C) 2022 Microchip Technology, Inc. and its subsidiaries
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/serial/atmel,at91-usart.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Atmel Universal Synchronous Asynchronous Receiver/Transmitter (USART)
+
+maintainers:
+  - Richard Genoud <richard.genoud@gmail.com>
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - atmel,at91rm9200-usart
+          - atmel,at91sam9260-usart
+          - microchip,sam9x60-usart
+      - items:
+          - const: atmel,at91rm9200-dbgu
+          - const: atmel,at91rm9200-usart
+      - items:
+          - const: atmel,at91sam9260-dbgu
+          - const: atmel,at91sam9260-usart
+      - items:
+          - const: microchip,sam9x60-dbgu
+          - const: microchip,sam9x60-usart
+          - const: atmel,at91sam9260-dbgu
+          - const: atmel,at91sam9260-usart
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clock-names:
+    minItems: 1
+    items:
+      - const: usart
+      - const: gclk
+
+  clocks:
+    minItems: 1
+    items:
+      - description: USART Peripheral Clock
+      - description: USART Generic Clock
+
+  dmas:
+    items:
+      - description: TX DMA Channel
+      - description: RX DMA Channel
+
+  dma-names:
+    items:
+      - const: tx
+      - const: rx
+
+  atmel,usart-mode:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Must be either <AT91_USART_MODE_SPI> for SPI or
+      <AT91_USART_MODE_SERIAL> for USART (found in dt-bindings/mfd/at91-usart.h).
+    enum: [ 0, 1 ]
+
+  atmel,use-dma-rx:
+    type: boolean
+    description: use of PDC or DMA for receiving data
+
+  atmel,use-dma-tx:
+    type: boolean
+    description: use of PDC or DMA for transmitting data
+
+  atmel,fifo-size:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Maximum number of data the RX and TX FIFOs can store for FIFO
+      capable USARTS.
+    enum: [ 16, 32 ]
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clock-names
+  - clocks
+  - atmel,usart-mode
+
+allOf:
+  - if:
+      properties:
+        atmel,usart-mode:
+          const: 1
+    then:
+      allOf:
+        - $ref: /schemas/spi/spi-controller.yaml#
+
+      properties:
+        atmel,use-dma-rx: false
+
+        atmel,use-dma-tx: false
+
+        atmel,fifo-size: false
+
+        "#size-cells":
+          const: 0
+
+        "#address-cells":
+          const: 1
+
+      required:
+        - "#size-cells"
+        - "#address-cells"
+
+    else:
+      allOf:
+        - $ref: /schemas/serial/serial.yaml#
+        - $ref: /schemas/serial/rs485.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/mfd/at91-usart.h>
+    #include <dt-bindings/dma/at91.h>
+
+    /* use PDC */
+    usart0: serial@fff8c000 {
+        compatible = "atmel,at91sam9260-usart";
+        reg = <0xfff8c000 0x4000>;
+        atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
+        interrupts = <7>;
+        clocks = <&usart0_clk>;
+        clock-names = "usart";
+        atmel,use-dma-rx;
+        atmel,use-dma-tx;
+        rts-gpios = <&pioD 15 GPIO_ACTIVE_LOW>;
+        cts-gpios = <&pioD 16 GPIO_ACTIVE_LOW>;
+        dtr-gpios = <&pioD 17 GPIO_ACTIVE_LOW>;
+        dsr-gpios = <&pioD 18 GPIO_ACTIVE_LOW>;
+        dcd-gpios = <&pioD 20 GPIO_ACTIVE_LOW>;
+        rng-gpios = <&pioD 19 GPIO_ACTIVE_LOW>;
+    };
+
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/mfd/at91-usart.h>
+    #include <dt-bindings/dma/at91.h>
+
+    /* use DMA */
+    usart1: serial@f001c000 {
+        compatible = "atmel,at91sam9260-usart";
+        reg = <0xf001c000 0x100>;
+        atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
+        interrupts = <12 IRQ_TYPE_LEVEL_HIGH 5>;
+        clocks = <&usart0_clk>;
+        clock-names = "usart";
+        atmel,use-dma-rx;
+        atmel,use-dma-tx;
+        dmas = <&dma0 2 AT91_DMA_CFG_PER_ID(3)>,
+               <&dma0 2 (AT91_DMA_CFG_PER_ID(4) | AT91_DMA_CFG_FIFOCFG_ASAP)>;
+        dma-names = "tx", "rx";
+        atmel,fifo-size = <32>;
+    };
+
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/mfd/at91-usart.h>
+    #include <dt-bindings/dma/at91.h>
+
+    /* SPI mode */
+    spi0: spi@f001c000 {
+        compatible = "atmel,at91sam9260-usart";
+        reg = <0xf001c000 0x100>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+        atmel,usart-mode = <AT91_USART_MODE_SPI>;
+        interrupts = <12 IRQ_TYPE_LEVEL_HIGH 5>;
+        clocks = <&usart0_clk>;
+        clock-names = "usart";
+        dmas = <&dma0 2 AT91_DMA_CFG_PER_ID(3)>,
+               <&dma0 2 (AT91_DMA_CFG_PER_ID(4) | AT91_DMA_CFG_FIFOCFG_ASAP)>;
+        dma-names = "tx", "rx";
+        cs-gpios = <&pioB 3 GPIO_ACTIVE_HIGH>;
+    };
diff --git a/Documentation/devicetree/bindings/serial/mediatek,uart.yaml b/Documentation/devicetree/bindings/serial/mediatek,uart.yaml
index 4ff27d6d4d5b..fe098d98af6e 100644
--- a/Documentation/devicetree/bindings/serial/mediatek,uart.yaml
+++ b/Documentation/devicetree/bindings/serial/mediatek,uart.yaml
@@ -42,6 +42,7 @@ properties:
               - mediatek,mt8173-uart
               - mediatek,mt8183-uart
               - mediatek,mt8186-uart
+              - mediatek,mt8188-uart
               - mediatek,mt8192-uart
               - mediatek,mt8195-uart
               - mediatek,mt8516-uart
diff --git a/Documentation/devicetree/bindings/serial/pl011.yaml b/Documentation/devicetree/bindings/serial/pl011.yaml
index d8aed84abcd3..80af72859876 100644
--- a/Documentation/devicetree/bindings/serial/pl011.yaml
+++ b/Documentation/devicetree/bindings/serial/pl011.yaml
@@ -94,6 +94,12 @@ properties:
   resets:
     maxItems: 1
 
+  reg-io-width:
+    description:
+      The size (in bytes) of the IO accesses that should be performed
+      on the device.
+    enum: [1, 4]
+
 required:
   - compatible
   - reg
diff --git a/Documentation/devicetree/bindings/serial/renesas,scif.yaml b/Documentation/devicetree/bindings/serial/renesas,scif.yaml
index 90fe45265fbc..f930e7f1349f 100644
--- a/Documentation/devicetree/bindings/serial/renesas,scif.yaml
+++ b/Documentation/devicetree/bindings/serial/renesas,scif.yaml
@@ -76,7 +76,7 @@ properties:
 
       - items:
           - enum:
-              - renesas,scif-r9a07g043      # RZ/G2UL
+              - renesas,scif-r9a07g043      # RZ/G2UL and RZ/Five
               - renesas,scif-r9a07g054      # RZ/V2L
           - const: renesas,scif-r9a07g044   # RZ/G2{L,LC} fallback
 
diff --git a/Documentation/devicetree/bindings/serial/samsung_uart.yaml b/Documentation/devicetree/bindings/serial/samsung_uart.yaml
index 41d3b082eb72..8bd88d5cbb11 100644
--- a/Documentation/devicetree/bindings/serial/samsung_uart.yaml
+++ b/Documentation/devicetree/bindings/serial/samsung_uart.yaml
@@ -40,7 +40,6 @@ properties:
     description: |
       The size (in bytes) of the IO accesses that should be performed
       on the device.
-    $ref: /schemas/types.yaml#/definitions/uint32
     enum: [ 1, 4 ]
 
   clocks:
@@ -72,6 +71,9 @@ properties:
     minItems: 1
     maxItems: 2
 
+  power-domains:
+    maxItems: 1
+
   samsung,uart-fifosize:
     description: The fifo size supported by the UART channel.
     $ref: /schemas/types.yaml#/definitions/uint32
diff --git a/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml b/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml
index dc74643ae72e..b9c2287c5d1e 100644
--- a/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml
+++ b/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml
@@ -26,6 +26,7 @@ properties:
               - rockchip,rk1808-uart
               - rockchip,rk3036-uart
               - rockchip,rk3066-uart
+              - rockchip,rk3128-uart
               - rockchip,rk3188-uart
               - rockchip,rk3288-uart
               - rockchip,rk3308-uart