Merge tag 'tty-4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel…

…/git/gregkh/tty

Pull tty/serial updates from Greg KH:
 "Here is the big tty/serial driver pull request for 4.15-rc1.

  Lots of serial driver updates in here, some small vt cleanups, and a
  raft of SPDX and license boilerplate cleanups, messing up the diffstat
  a bit.

  Nothing major, with no realy functional changes except better hardware
  support for some platforms.

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

* tag 'tty-4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (110 commits)
  tty: ehv_bytechan: fix spelling mistake
  tty: serial: meson: allow baud-rates lower than 9600
  serial: 8250_fintek: Fix crash with baud rate B0
  serial: 8250_fintek: Disable delays for ports != 0
  serial: 8250_fintek: Return -EINVAL on invalid configuration
  tty: Remove redundant license text
  tty: serdev: Remove redundant license text
  tty: hvc: Remove redundant license text
  tty: serial: Remove redundant license text
  tty: add SPDX identifiers to all remaining files in drivers/tty/
  tty: serial: jsm: remove redundant pointer ts
  tty: serial: jsm: add space before the open parenthesis '('
  tty: serial: jsm: fix coding style
  tty: serial: jsm: delete space between function name and '('
  tty: serial: jsm: add blank line after declarations
  tty: serial: jsm: change the type of local variable
  tty: serial: imx: remove dead code imx_dma_rxint
  tty: serial: imx: disable ageing timer interrupt if dma in use
  serial: 8250: fix potential deadlock in rs485-mode
  serial: m32r_sio: Drop redundant .data assignment
  ...

Documentation/devicetree/bindings/dma/stm32-dma.txt

@@ -71,7 +71,7 @@ channel: a phandle to the DMA controller plus the following four integer cells:
 Example:
 
 	usart1: serial@40011000 {
-		compatible = "st,stm32-usart", "st,stm32-uart";
+		compatible = "st,stm32-uart";
 		reg = <0x40011000 0x400>;
 		interrupts = <37>;
 		clocks = <&clk_pclk2>;

Documentation/devicetree/bindings/serial/atmel-usart.txt

@@ -24,6 +24,7 @@ Optional properties:
 	- dma-names: "rx" for RX channel, "tx" for TX channel.
 - 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

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

@@ -9,6 +9,7 @@ Optional properties:
 - fsl,irda-mode : Indicate the uart supports irda mode
 - fsl,dte-mode : Indicate the uart works in DTE mode. The uart works
                   in DCE mode by default.
+- rs485-rts-delay, rs485-rx-during-tx, linux,rs485-enabled-at-boot-time: see rs485.txt
 
 Please check Documentation/devicetree/bindings/serial/serial.txt
 for the complete list of generic properties.

Documentation/devicetree/bindings/serial/fsl-lpuart.txt

@@ -16,6 +16,7 @@ Required properties:
 Optional properties:
 - dmas: A list of two dma specifiers, one for each entry in dma-names.
 - dma-names: should contain "tx" and "rx".
+- rs485-rts-delay, rs485-rx-during-tx, linux,rs485-enabled-at-boot-time: see rs485.txt
 
 Note: Optional properties for DMA support. Write them both or both not.
 

Documentation/devicetree/bindings/serial/omap_serial.txt

@@ -19,6 +19,7 @@ Optional properties:
 - dmas : DMA specifier, consisting of a phandle to the DMA controller
          node and a DMA channel number.
 - dma-names : "rx" for receive channel, "tx" for transmit channel.
+- rs485-rts-delay, rs485-rx-during-tx, linux,rs485-enabled-at-boot-time: see rs485.txt
 
 Example:
 

Documentation/devicetree/bindings/serial/st,stm32-usart.txt

@@ -2,14 +2,10 @@
 
 Required properties:
 - compatible: can be either:
-  - "st,stm32-usart",
   - "st,stm32-uart",
-  - "st,stm32f7-usart",
   - "st,stm32f7-uart",
-  - "st,stm32h7-usart"
   - "st,stm32h7-uart".
-  depending on whether the device supports synchronous mode
-  and is compatible with stm32(f4), stm32f7 or stm32h7.
+  depending is compatible with stm32(f4), stm32f7 or stm32h7.
 - reg: The address and length of the peripheral registers space
 - interrupts:
   - The interrupt line for the USART instance,
@@ -33,7 +29,7 @@ usart4: serial@40004c00 {
 };
 
 usart2: serial@40004400 {
-	compatible = "st,stm32-usart", "st,stm32-uart";
+	compatible = "st,stm32-uart";
 	reg = <0x40004400 0x400>;
 	interrupts = <38>;
 	clocks = <&clk_pclk1>;
@@ -43,7 +39,7 @@ usart2: serial@40004400 {
 };
 
 usart1: serial@40011000 {
-	compatible = "st,stm32-usart", "st,stm32-uart";
+	compatible = "st,stm32-uart";
 	reg = <0x40011000 0x400>;
 	interrupts = <37>;
 	clocks = <&rcc 0 164>;

arch/arm/boot/dts/stm32f429.dtsi

@@ -314,15 +314,15 @@
 		};
 
 		usart2: serial@40004400 {
-			compatible = "st,stm32-usart", "st,stm32-uart";
+			compatible = "st,stm32-uart";
 			reg = <0x40004400 0x400>;
 			interrupts = <38>;
 			clocks = <&rcc 0 STM32F4_APB1_CLOCK(UART2)>;
 			status = "disabled";
 		};
 
 		usart3: serial@40004800 {
-			compatible = "st,stm32-usart", "st,stm32-uart";
+			compatible = "st,stm32-uart";
 			reg = <0x40004800 0x400>;
 			interrupts = <39>;
 			clocks = <&rcc 0 STM32F4_APB1_CLOCK(UART3)>;
@@ -386,15 +386,15 @@
 		};
 
 		usart7: serial@40007800 {
-			compatible = "st,stm32-usart", "st,stm32-uart";
+			compatible = "st,stm32-uart";
 			reg = <0x40007800 0x400>;
 			interrupts = <82>;
 			clocks = <&rcc 0 STM32F4_APB1_CLOCK(UART7)>;
 			status = "disabled";
 		};
 
 		usart8: serial@40007c00 {
-			compatible = "st,stm32-usart", "st,stm32-uart";
+			compatible = "st,stm32-uart";
 			reg = <0x40007c00 0x400>;
 			interrupts = <83>;
 			clocks = <&rcc 0 STM32F4_APB1_CLOCK(UART8)>;
@@ -444,7 +444,7 @@
 		};
 
 		usart1: serial@40011000 {
-			compatible = "st,stm32-usart", "st,stm32-uart";
+			compatible = "st,stm32-uart";
 			reg = <0x40011000 0x400>;
 			interrupts = <37>;
 			clocks = <&rcc 0 STM32F4_APB2_CLOCK(USART1)>;
@@ -455,7 +455,7 @@
 		};
 
 		usart6: serial@40011400 {
-			compatible = "st,stm32-usart", "st,stm32-uart";
+			compatible = "st,stm32-uart";
 			reg = <0x40011400 0x400>;
 			interrupts = <71>;
 			clocks = <&rcc 0 STM32F4_APB2_CLOCK(USART6)>;

arch/arm/boot/dts/stm32f746.dtsi

@@ -136,15 +136,15 @@
 		};
 
 		usart2: serial@40004400 {
-			compatible = "st,stm32f7-usart", "st,stm32f7-uart";
+			compatible = "st,stm32f7-uart";
 			reg = <0x40004400 0x400>;
 			interrupts = <38>;
 			clocks = <&rcc 1 CLK_USART2>;
 			status = "disabled";
 		};
 
 		usart3: serial@40004800 {
-			compatible = "st,stm32f7-usart", "st,stm32f7-uart";
+			compatible = "st,stm32f7-uart";
 			reg = <0x40004800 0x400>;
 			interrupts = <39>;
 			clocks = <&rcc 1 CLK_USART3>;
@@ -177,31 +177,31 @@
 		};
 
 		usart7: serial@40007800 {
-			compatible = "st,stm32f7-usart", "st,stm32f7-uart";
+			compatible = "st,stm32f7-uart";
 			reg = <0x40007800 0x400>;
 			interrupts = <82>;
 			clocks = <&rcc 1 CLK_UART7>;
 			status = "disabled";
 		};
 
 		usart8: serial@40007c00 {
-			compatible = "st,stm32f7-usart", "st,stm32f7-uart";
+			compatible = "st,stm32f7-uart";
 			reg = <0x40007c00 0x400>;
 			interrupts = <83>;
 			clocks = <&rcc 1 CLK_UART8>;
 			status = "disabled";
 		};
 
 		usart1: serial@40011000 {
-			compatible = "st,stm32f7-usart", "st,stm32f7-uart";
+			compatible = "st,stm32f7-uart";
 			reg = <0x40011000 0x400>;
 			interrupts = <37>;
 			clocks = <&rcc 1 CLK_USART1>;
 			status = "disabled";
 		};
 
 		usart6: serial@40011400 {
-			compatible = "st,stm32f7-usart", "st,stm32f7-uart";
+			compatible = "st,stm32f7-uart";
 			reg = <0x40011400 0x400>;
 			interrupts = <71>;
 			clocks = <&rcc 1 CLK_USART6>;

arch/arm/boot/dts/stm32h743.dtsi

@@ -67,7 +67,7 @@
 		};
 
 		usart2: serial@40004400 {
-			compatible = "st,stm32f7-usart", "st,stm32f7-uart";
+			compatible = "st,stm32f7-uart";
 			reg = <0x40004400 0x400>;
 			interrupts = <38>;
 			status = "disabled";
@@ -99,7 +99,7 @@
 		};
 
 		usart1: serial@40011000 {
-			compatible = "st,stm32f7-usart", "st,stm32f7-uart";
+			compatible = "st,stm32f7-uart";
 			reg = <0x40011000 0x400>;
 			interrupts = <37>;
 			status = "disabled";

drivers/acpi/scan.c

@@ -1505,41 +1505,38 @@ static void acpi_init_coherency(struct acpi_device *adev)
 	adev->flags.coherent_dma = cca;
 }
 
-static int acpi_check_spi_i2c_slave(struct acpi_resource *ares, void *data)
+static int acpi_check_serial_bus_slave(struct acpi_resource *ares, void *data)
 {
-	bool *is_spi_i2c_slave_p = data;
+	bool *is_serial_bus_slave_p = data;
 
 	if (ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS)
 		return 1;
 
-	/*
-	 * devices that are connected to UART still need to be enumerated to
-	 * platform bus
-	 */
-	if (ares->data.common_serial_bus.type != ACPI_RESOURCE_SERIAL_TYPE_UART)
-		*is_spi_i2c_slave_p = true;
+	*is_serial_bus_slave_p = true;
 
 	 /* no need to do more checking */
 	return -1;
 }
 
-static bool acpi_is_spi_i2c_slave(struct acpi_device *device)
+static bool acpi_is_serial_bus_slave(struct acpi_device *device)
 {
 	struct list_head resource_list;
-	bool is_spi_i2c_slave = false;
+	bool is_serial_bus_slave = false;
 
 	/* Macs use device properties in lieu of _CRS resources */
 	if (x86_apple_machine &&
 	    (fwnode_property_present(&device->fwnode, "spiSclkPeriod") ||
-	     fwnode_property_present(&device->fwnode, "i2cAddress")))
+	     fwnode_property_present(&device->fwnode, "i2cAddress") ||
+	     fwnode_property_present(&device->fwnode, "baud")))
 		return true;
 
 	INIT_LIST_HEAD(&resource_list);
-	acpi_dev_get_resources(device, &resource_list, acpi_check_spi_i2c_slave,
-			       &is_spi_i2c_slave);
+	acpi_dev_get_resources(device, &resource_list,
+			       acpi_check_serial_bus_slave,
+			       &is_serial_bus_slave);
 	acpi_dev_free_resource_list(&resource_list);
 
-	return is_spi_i2c_slave;
+	return is_serial_bus_slave;
 }
 
 void acpi_init_device_object(struct acpi_device *device, acpi_handle handle,
@@ -1557,7 +1554,7 @@ void acpi_init_device_object(struct acpi_device *device, acpi_handle handle,
 	acpi_bus_get_flags(device);
 	device->flags.match_driver = false;
 	device->flags.initialized = true;
-	device->flags.spi_i2c_slave = acpi_is_spi_i2c_slave(device);
+	device->flags.serial_bus_slave = acpi_is_serial_bus_slave(device);
 	acpi_device_clear_enumerated(device);
 	device_initialize(&device->dev);
 	dev_set_uevent_suppress(&device->dev, true);
@@ -1841,10 +1838,10 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used,
 static void acpi_default_enumeration(struct acpi_device *device)
 {
 	/*
-	 * Do not enumerate SPI/I2C slaves as they will be enumerated by their
-	 * respective parents.
+	 * Do not enumerate SPI/I2C/UART slaves as they will be enumerated by
+	 * their respective parents.
 	 */
-	if (!device->flags.spi_i2c_slave) {
+	if (!device->flags.serial_bus_slave) {
 		acpi_create_platform_device(device, NULL);
 		acpi_device_set_enumerated(device);
 	} else {
@@ -1941,7 +1938,7 @@ static void acpi_bus_attach(struct acpi_device *device)
 		return;
 
 	device->flags.match_driver = true;
-	if (ret > 0 && !device->flags.spi_i2c_slave) {
+	if (ret > 0 && !device->flags.serial_bus_slave) {
 		acpi_device_set_enumerated(device);
 		goto ok;
 	}
@@ -1950,7 +1947,7 @@ static void acpi_bus_attach(struct acpi_device *device)
 	if (ret < 0)
 		return;
 
-	if (!device->pnp.type.platform_id && !device->flags.spi_i2c_slave)
+	if (!device->pnp.type.platform_id && !device->flags.serial_bus_slave)
 		acpi_device_set_enumerated(device);
 	else
 		acpi_default_enumeration(device);

drivers/tty/amiserial.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Serial driver for the amiga builtin port.
  *

drivers/tty/bfin_jtag_comm.c

@@ -1,11 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * TTY over Blackfin JTAG Communication
  *
  * Copyright 2008-2009 Analog Devices Inc.
  *
  * Enter bugs at http://blackfin.uclinux.org/
- *
- * Licensed under the GPL-2 or later.
  */
 
 #define DRV_NAME "bfin-jtag-comm"

drivers/tty/cyclades.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #undef	BLOCKMOVE
 #define	Z_WAKE
 #undef	Z_EXT_CHARS_IN_BUFFER
@@ -286,8 +287,7 @@ static long cyz_polling_cycle = CZ_DEF_POLL;
 static DEFINE_TIMER(cyz_timerlist, cyz_poll);
 
 #else				/* CONFIG_CYZ_INTR */
-static void cyz_rx_restart(unsigned long);
-static struct timer_list cyz_rx_full_timer[NR_PORTS];
+static void cyz_rx_restart(struct timer_list *);
 #endif				/* CONFIG_CYZ_INTR */
 
 static void cyy_writeb(struct cyclades_port *port, u32 reg, u8 val)
@@ -992,10 +992,8 @@ static void cyz_handle_rx(struct cyclades_port *info)
 	else
 		char_count = rx_put - rx_get + rx_bufsize;
 	if (char_count >= readl(&buf_ctrl->rx_threshold) &&
-			!timer_pending(&cyz_rx_full_timer[
-					info->line]))
-		mod_timer(&cyz_rx_full_timer[info->line],
-				jiffies + 1);
+			!timer_pending(&info->rx_full_timer))
+		mod_timer(&info->rx_full_timer, jiffies + 1);
 #endif
 	info->idle_stats.recv_idle = jiffies;
 	tty_schedule_flip(&info->port);
@@ -1197,9 +1195,9 @@ static irqreturn_t cyz_interrupt(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }				/* cyz_interrupt */
 
-static void cyz_rx_restart(unsigned long arg)
+static void cyz_rx_restart(struct timer_list *t)
 {
-	struct cyclades_port *info = (struct cyclades_port *)arg;
+	struct cyclades_port *info = from_timer(info, t, rx_full_timer);
 	struct cyclades_card *card = info->card;
 	int retval;
 	__u32 channel = info->line - card->first_line;
@@ -3097,8 +3095,7 @@ static int cy_init_card(struct cyclades_card *cinfo)
 			else
 				info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
 #ifdef CONFIG_CYZ_INTR
-			setup_timer(&cyz_rx_full_timer[port],
-				cyz_rx_restart, (unsigned long)info);
+			timer_setup(&info->rx_full_timer, cyz_rx_restart, 0);
 #endif
 		} else {
 			unsigned short chip_number;

drivers/tty/ehv_bytechan.c

@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
 /* ePAPR hypervisor byte channel device driver
  *
  * Copyright 2009-2011 Freescale Semiconductor, Inc.
  *
  * Author: Timur Tabi <timur@freescale.com>
  *
- * This file is licensed under the terms of the GNU General Public License
- * version 2.  This program is licensed "as is" without any warranty of any
- * kind, whether express or implied.
- *
  * This driver support three distinct interfaces, all of which are related to
  * ePAPR hypervisor byte channels.
  *
@@ -328,7 +325,7 @@ console_initcall(ehv_bc_console_init);
 /******************************** TTY DRIVER ********************************/
 
 /*
- * byte channel receive interupt handler
+ * byte channel receive interrupt handler
  *
  * This ISR is called whenever data is available on a byte channel.
  */
@@ -428,7 +425,7 @@ static void ehv_bc_tx_dequeue(struct ehv_bc_data *bc)
 }
 
 /*
- * byte channel transmit interupt handler
+ * byte channel transmit interrupt handler
  *
  * This ISR is called whenever space becomes available for transmitting
  * characters on a byte channel.