Merge tag 'tty-4.19-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 tty and serial driver pull request for 4.19-rc1.

  It's not all that big, just a number of small serial driver updates
  and fixes, along with some better vt handling for unicode characters
  for those using braille terminals.

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

* tag 'tty-4.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (73 commits)
  tty: serial: 8250: Revert NXP SC16C2552 workaround
  serial: 8250_exar: Read INT0 from slave device, too
  tty: rocket: Fix possible buffer overwrite on register_PCI
  serial: 8250_dw: Add ACPI support for uart on Broadcom SoC
  serial: 8250_dw: always set baud rate in dw8250_set_termios
  dt-bindings: serial: Add binding for uartlite
  tty: serial: uartlite: Add support for suspend and resume
  tty: serial: uartlite: Add clock adaptation
  tty: serial: uartlite: Add structure for private data
  serial: sh-sci: Improve support for separate TEI and DRI interrupts
  serial: sh-sci: Remove SCIx_RZ_SCIFA_REGTYPE
  serial: sh-sci: Allow for compressed SCIF address
  serial: sh-sci: Improve interrupts description
  serial: 8250: Use cached port name directly in messages
  serial: 8250_exar: Drop unused variable in pci_xr17v35x_setup()
  vt: drop unused struct vt_struct
  vt: avoid a VLA in the unicode screen scroll function
  vt: add /dev/vcsu* to devices.txt
  vt: coherence validation code for the unicode screen buffer
  vt: selection: take screen contents from uniscr if available
  ...

10 files changed, 73 insertions, 10 deletions

diff --git a/Documentation/admin-guide/devices.txt b/Documentation/admin-guide/devices.txt
index 4ec843123cc3..1649117e6087 100644
--- a/Documentation/admin-guide/devices.txt
+++ b/Documentation/admin-guide/devices.txt
@@ -173,14 +173,18 @@
 		they are redirected through the parport multiplex layer.
 
    7 char	Virtual console capture devices
-		  0 = /dev/vcs		Current vc text contents
-		  1 = /dev/vcs1		tty1 text contents
+		  0 = /dev/vcs		Current vc text (glyph) contents
+		  1 = /dev/vcs1		tty1 text (glyph) contents
 		    ...
-		 63 = /dev/vcs63	tty63 text contents
-		128 = /dev/vcsa		Current vc text/attribute contents
-		129 = /dev/vcsa1	tty1 text/attribute contents
+		 63 = /dev/vcs63	tty63 text (glyph) contents
+		 64 = /dev/vcsu		Current vc text (unicode) contents
+		65 = /dev/vcsu1		tty1 text (unicode) contents
 		    ...
-		191 = /dev/vcsa63	tty63 text/attribute contents
+		127 = /dev/vcsu63	tty63 text (unicode) contents
+		128 = /dev/vcsa		Current vc text/attribute (glyph) contents
+		129 = /dev/vcsa1	tty1 text/attribute (glyph) contents
+		    ...
+		191 = /dev/vcsa63	tty63 text/attribute (glyph) contents
 
 		NOTE: These devices permit both read and write access.
 
diff --git a/Documentation/devicetree/bindings/arm/mediatek.txt b/Documentation/devicetree/bindings/arm/mediatek.txt
index 7d21ab37c19c..48fac4ec91fc 100644
--- a/Documentation/devicetree/bindings/arm/mediatek.txt
+++ b/Documentation/devicetree/bindings/arm/mediatek.txt
@@ -11,6 +11,7 @@ compatible: Must contain one of
    "mediatek,mt6589"
    "mediatek,mt6592"
    "mediatek,mt6755"
+   "mediatek,mt6765"
    "mediatek,mt6795"
    "mediatek,mt6797"
    "mediatek,mt7622"
@@ -41,6 +42,9 @@ Supported boards:
 - Evaluation phone for MT6755(Helio P10):
     Required root node properties:
       - compatible = "mediatek,mt6755-evb", "mediatek,mt6755";
+- Evaluation board for MT6765(Helio P22):
+    Required root node properties:
+      - compatible = "mediatek,mt6765-evb", "mediatek,mt6765";
 - Evaluation board for MT6795(Helio X10):
     Required root node properties:
       - compatible = "mediatek,mt6795-evb", "mediatek,mt6795";
diff --git a/Documentation/devicetree/bindings/interrupt-controller/mediatek,sysirq.txt b/Documentation/devicetree/bindings/interrupt-controller/mediatek,sysirq.txt
index 6a32922a55b8..33a98eb44949 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/mediatek,sysirq.txt
+++ b/Documentation/devicetree/bindings/interrupt-controller/mediatek,sysirq.txt
@@ -11,6 +11,7 @@ Required properties:
 	"mediatek,mt7622-sysirq", "mediatek,mt6577-sysirq": for MT7622
 	"mediatek,mt6795-sysirq", "mediatek,mt6577-sysirq": for MT6795
 	"mediatek,mt6797-sysirq", "mediatek,mt6577-sysirq": for MT6797
+	"mediatek,mt6765-sysirq", "mediatek,mt6577-sysirq": for MT6765
 	"mediatek,mt6755-sysirq", "mediatek,mt6577-sysirq": for MT6755
 	"mediatek,mt6592-sysirq", "mediatek,mt6577-sysirq": for MT6592
 	"mediatek,mt6589-sysirq", "mediatek,mt6577-sysirq": for MT6589
diff --git a/Documentation/devicetree/bindings/serial/fsl-imx-uart.txt b/Documentation/devicetree/bindings/serial/fsl-imx-uart.txt
index afcfbc34e243..35957cbf1571 100644
--- a/Documentation/devicetree/bindings/serial/fsl-imx-uart.txt
+++ b/Documentation/devicetree/bindings/serial/fsl-imx-uart.txt
@@ -9,7 +9,11 @@ Optional properties:
 - fsl,dte-mode : Indicate the uart works in DTE mode. The uart works
                   in DCE mode by default.
 - rs485-rts-delay, rs485-rts-active-low, rs485-rx-during-tx,
-  linux,rs485-enabled-at-boot-time: see rs485.txt
+  linux,rs485-enabled-at-boot-time: see rs485.txt. Note that for RS485
+  you must enable either the "uart-has-rtscts" or the "rts-gpios"
+  properties. In case you use "uart-has-rtscts" the signal that controls
+  the transceiver is actually CTS_B, not RTS_B. CTS_B is always output,
+  and RTS_B is input, regardless of dte-mode.
 
 Please check Documentation/devicetree/bindings/serial/serial.txt
 for the complete list of generic properties.
diff --git a/Documentation/devicetree/bindings/serial/mtk-uart.txt b/Documentation/devicetree/bindings/serial/mtk-uart.txt
index f73abff3de43..742cb470595b 100644
--- a/Documentation/devicetree/bindings/serial/mtk-uart.txt
+++ b/Documentation/devicetree/bindings/serial/mtk-uart.txt
@@ -8,6 +8,7 @@ Required properties:
   * "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,mt6795-uart" for MT6795 compatible UARTS
   * "mediatek,mt6797-uart" for MT6797 compatible UARTS
   * "mediatek,mt7622-uart" for MT7622 compatible UARTS
diff --git a/Documentation/devicetree/bindings/serial/omap_serial.txt b/Documentation/devicetree/bindings/serial/omap_serial.txt
index 4b0f05adb228..c35d5ece1156 100644
--- a/Documentation/devicetree/bindings/serial/omap_serial.txt
+++ b/Documentation/devicetree/bindings/serial/omap_serial.txt
@@ -1,6 +1,7 @@
 OMAP UART controller
 
 Required properties:
+- compatible : should be "ti,am654-uart" for AM654 controllers
 - compatible : should be "ti,omap2-uart" for OMAP2 controllers
 - compatible : should be "ti,omap3-uart" for OMAP3 controllers
 - compatible : should be "ti,omap4-uart" for OMAP4 controllers
diff --git a/Documentation/devicetree/bindings/serial/renesas,rzn1-uart.txt b/Documentation/devicetree/bindings/serial/renesas,rzn1-uart.txt
new file mode 100644
index 000000000000..8b9e0d4dc2e4
--- /dev/null
+++ b/Documentation/devicetree/bindings/serial/renesas,rzn1-uart.txt
@@ -0,0 +1,10 @@
+Renesas RZ/N1 UART
+
+This controller is based on the Synopsys DesignWare ABP UART and inherits all
+properties defined in snps-dw-apb-uart.txt except for the compatible property.
+
+Required properties:
+- compatible : The device specific string followed by the generic RZ/N1 string.
+   Therefore it must be one of:
+   "renesas,r9a06g032-uart", "renesas,rzn1-uart"
+   "renesas,r9a06g033-uart", "renesas,rzn1-uart"
diff --git a/Documentation/devicetree/bindings/serial/renesas,sci-serial.txt b/Documentation/devicetree/bindings/serial/renesas,sci-serial.txt
index 106808b55b6d..eaca9da79d83 100644
--- a/Documentation/devicetree/bindings/serial/renesas,sci-serial.txt
+++ b/Documentation/devicetree/bindings/serial/renesas,sci-serial.txt
@@ -5,6 +5,7 @@ Required properties:
   - compatible: Must contain one or more of the following:
 
     - "renesas,scif-r7s72100" for R7S72100 (RZ/A1H) SCIF compatible UART.
+    - "renesas,scif-r7s9210" for R7S9210 (RZ/A2) SCIF compatible UART.
     - "renesas,scifa-r8a73a4" for R8A73A4 (R-Mobile APE6) SCIFA compatible UART.
     - "renesas,scifb-r8a73a4" for R8A73A4 (R-Mobile APE6) SCIFB compatible UART.
     - "renesas,scifa-r8a7740" for R8A7740 (R-Mobile A1) SCIFA compatible UART.
@@ -72,7 +73,21 @@ Required properties:
     family-specific and/or generic versions.
 
   - reg: Base address and length of the I/O registers used by the UART.
-  - interrupts: Must contain an interrupt-specifier for the SCIx interrupt.
+  - interrupts: Must contain one or more interrupt-specifiers for the SCIx.
+                If a single interrupt is expressed, then all events are
+                multiplexed into this single interrupt.
+
+                If multiple interrupts are provided by the hardware, the order
+                in which the interrupts are listed must match order below. Note
+                that some HW interrupt events may be muxed together resulting
+                in duplicate entries.
+                The interrupt order is as follows:
+                  1. Error (ERI)
+                  2. Receive buffer full (RXI)
+                  3. Transmit buffer empty (TXI)
+                  4. Break (BRI)
+                  5. Data Ready (DRI)
+                  6. Transmit End (TEI)
 
   - clocks: Must contain a phandle and clock-specifier pair for each entry
     in clock-names.
@@ -89,7 +104,7 @@ Required properties:
       - "scif_clk" for the optional external clock source for the frequency
 	divider (SCIF_CLK).
 
-Note: Each enabled SCIx UART should have an alias correctly numbered in the
+Note: Each enabled SCIx UART may have an optional "serialN" alias in the
 "aliases" node.
 
 Optional properties:
diff --git a/Documentation/devicetree/bindings/serial/xlnx,opb-uartlite.txt b/Documentation/devicetree/bindings/serial/xlnx,opb-uartlite.txt
new file mode 100644
index 000000000000..c37deb44dead
--- /dev/null
+++ b/Documentation/devicetree/bindings/serial/xlnx,opb-uartlite.txt
@@ -0,0 +1,23 @@
+Xilinx Axi Uartlite controller Device Tree Bindings
+---------------------------------------------------------
+
+Required properties:
+- compatible		: Can be either of
+				"xlnx,xps-uartlite-1.00.a"
+				"xlnx,opb-uartlite-1.00.b"
+- reg			: Physical base address and size of the Axi Uartlite
+			  registers map.
+- interrupts		: Should contain the UART controller interrupt.
+
+Optional properties:
+- port-number		: Set Uart port number
+- clock-names		: Should be "s_axi_aclk"
+- clocks		: Input clock specifier. Refer to common clock bindings.
+
+Example:
+serial@800c0000 {
+	compatible = "xlnx,xps-uartlite-1.00.a";
+	reg = <0x0 0x800c0000 0x10000>;
+	interrupts = <0x0 0x6e 0x1>;
+	port-number = <0>;
+};
diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,geni-se.txt b/Documentation/devicetree/bindings/soc/qcom/qcom,geni-se.txt
index 68b7d6207e3d..ff92e5a41bed 100644
--- a/Documentation/devicetree/bindings/soc/qcom/qcom,geni-se.txt
+++ b/Documentation/devicetree/bindings/soc/qcom/qcom,geni-se.txt
@@ -46,7 +46,7 @@ Child nodes should conform to I2C bus binding as described in i2c.txt.
 Qualcomm Technologies Inc. GENI Serial Engine based UART Controller
 
 Required properties:
-- compatible:		Must be "qcom,geni-debug-uart".
+- compatible:		Must be "qcom,geni-debug-uart" or "qcom,geni-uart".
 - reg: 			Must contain UART register location and length.
 - interrupts: 		Must contain UART core interrupts.
 - clock-names:		Must contain "se".