Merge tag 'tty-4.18-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 update for 4.18-rc1.

  There's nothing major here, just lots of serial driver updates. Full
  details are in the shortlog, nothing anything specific to call out
  here.

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

* tag 'tty-4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (55 commits)
  vt: Perform safe console erase only once
  serial: imx: disable UCR4_OREN on shutdown
  serial: imx: drop CTS/RTS handling from shutdown
  tty: fix typo in ASYNCB_FOURPORT comment
  serial: samsung: check DMA engine capabilities before using DMA mode
  tty: Fix data race in tty_insert_flip_string_fixed_flag
  tty: serial: msm_geni_serial: Fix TX infinite loop
  serial: 8250_dw: Fix runtime PM handling
  serial: 8250: omap: Fix idling of clocks for unused uarts
  tty: serial: drop ATH79 specific SoC symbols
  serial: 8250: Add missing rxtrig_bytes on Altera 16550 UART
  serial/aspeed-vuart: fix a couple mod_timer() calls
  serial: sh-sci: Use spin_{try}lock_irqsave instead of open coding version
  serial: 8250_of: Add IO space support
  tty/serial: atmel: use port->name as name in request_irq()
  serial: imx: dma_unmap_sg buffers on shutdown
  serial: imx: cleanup imx_uart_disable_dma()
  tty: serial: qcom_geni_serial: Add early console support
  tty: serial: qcom_geni_serial: Return IRQ_NONE for spurious interrupts
  tty: serial: qcom_geni_serial: Use iowrite32_rep to write to FIFO
  ...

1 files changed, 42 insertions, 66 deletions

diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c
index bd72dd843338..8a3e34234e98 100644
--- a/drivers/tty/serial/xilinx_uartps.c
+++ b/drivers/tty/serial/xilinx_uartps.c
@@ -1097,45 +1097,6 @@ static const struct uart_ops cdns_uart_ops = {
 #endif
 };
 
-static struct uart_port cdns_uart_port[CDNS_UART_NR_PORTS];
-
-/**
- * cdns_uart_get_port - Configure the port from platform device resource info
- * @id: Port id
- *
- * Return: a pointer to a uart_port or NULL for failure
- */
-static struct uart_port *cdns_uart_get_port(int id)
-{
-	struct uart_port *port;
-
-	/* Try the given port id if failed use default method */
-	if (id < CDNS_UART_NR_PORTS && cdns_uart_port[id].mapbase != 0) {
-		/* Find the next unused port */
-		for (id = 0; id < CDNS_UART_NR_PORTS; id++)
-			if (cdns_uart_port[id].mapbase == 0)
-				break;
-	}
-
-	if (id >= CDNS_UART_NR_PORTS)
-		return NULL;
-
-	port = &cdns_uart_port[id];
-
-	/* At this point, we've got an empty uart_port struct, initialize it */
-	spin_lock_init(&port->lock);
-	port->membase	= NULL;
-	port->irq	= 0;
-	port->type	= PORT_UNKNOWN;
-	port->iotype	= UPIO_MEM32;
-	port->flags	= UPF_BOOT_AUTOCONF;
-	port->ops	= &cdns_uart_ops;
-	port->fifosize	= CDNS_UART_FIFO_SIZE;
-	port->line	= id;
-	port->dev	= NULL;
-	return port;
-}
-
 #ifdef CONFIG_SERIAL_XILINX_PS_UART_CONSOLE
 /**
  * cdns_uart_console_wait_tx - Wait for the TX to be full
@@ -1206,6 +1167,10 @@ OF_EARLYCON_DECLARE(cdns, "cdns,uart-r1p8", cdns_early_console_setup);
 OF_EARLYCON_DECLARE(cdns, "cdns,uart-r1p12", cdns_early_console_setup);
 OF_EARLYCON_DECLARE(cdns, "xlnx,zynqmp-uart", cdns_early_console_setup);
 
+
+/* Static pointer to console port */
+static struct uart_port *console_port;
+
 /**
  * cdns_uart_console_write - perform write operation
  * @co: Console handle
@@ -1215,7 +1180,7 @@ OF_EARLYCON_DECLARE(cdns, "xlnx,zynqmp-uart", cdns_early_console_setup);
 static void cdns_uart_console_write(struct console *co, const char *s,
 				unsigned int count)
 {
-	struct uart_port *port = &cdns_uart_port[co->index];
+	struct uart_port *port = console_port;
 	unsigned long flags;
 	unsigned int imr, ctrl;
 	int locked = 1;
@@ -1261,15 +1226,13 @@ static void cdns_uart_console_write(struct console *co, const char *s,
  */
 static int __init cdns_uart_console_setup(struct console *co, char *options)
 {
-	struct uart_port *port = &cdns_uart_port[co->index];
+	struct uart_port *port = console_port;
+
 	int baud = 9600;
 	int bits = 8;
 	int parity = 'n';
 	int flow = 'n';
 
-	if (co->index < 0 || co->index >= CDNS_UART_NR_PORTS)
-		return -EINVAL;
-
 	if (!port->membase) {
 		pr_debug("console on " CDNS_UART_TTY_NAME "%i not present\n",
 			 co->index);
@@ -1293,20 +1256,6 @@ static struct console cdns_uart_console = {
 	.index	= -1, /* Specified on the cmdline (e.g. console=ttyPS ) */
 	.data	= &cdns_uart_uart_driver,
 };
-
-/**
- * cdns_uart_console_init - Initialization call
- *
- * Return: 0 on success, negative errno otherwise
- */
-static int __init cdns_uart_console_init(void)
-{
-	register_console(&cdns_uart_console);
-	return 0;
-}
-
-console_initcall(cdns_uart_console_init);
-
 #endif /* CONFIG_SERIAL_XILINX_PS_UART_CONSOLE */
 
 static struct uart_driver cdns_uart_uart_driver = {
@@ -1430,8 +1379,7 @@ static int cdns_uart_resume(struct device *device)
 #endif /* ! CONFIG_PM_SLEEP */
 static int __maybe_unused cdns_runtime_suspend(struct device *dev)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct uart_port *port = platform_get_drvdata(pdev);
+	struct uart_port *port = dev_get_drvdata(dev);
 	struct cdns_uart *cdns_uart = port->private_data;
 
 	clk_disable(cdns_uart->uartclk);
@@ -1441,8 +1389,7 @@ static int __maybe_unused cdns_runtime_suspend(struct device *dev)
 
 static int __maybe_unused cdns_runtime_resume(struct device *dev)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct uart_port *port = platform_get_drvdata(pdev);
+	struct uart_port *port = dev_get_drvdata(dev);
 	struct cdns_uart *cdns_uart = port->private_data;
 
 	clk_enable(cdns_uart->pclk);
@@ -1487,6 +1434,9 @@ static int cdns_uart_probe(struct platform_device *pdev)
 			GFP_KERNEL);
 	if (!cdns_uart_data)
 		return -ENOMEM;
+	port = devm_kzalloc(&pdev->dev, sizeof(*port), GFP_KERNEL);
+	if (!port)
+		return -ENOMEM;
 
 	match = of_match_node(cdns_uart_of_match, pdev->dev.of_node);
 	if (match && match->data) {
@@ -1552,15 +1502,24 @@ static int cdns_uart_probe(struct platform_device *pdev)
 	if (id < 0)
 		id = 0;
 
-	/* Initialize the port structure */
-	port = cdns_uart_get_port(id);
-
-	if (!port) {
+	if (id >= CDNS_UART_NR_PORTS) {
 		dev_err(&pdev->dev, "Cannot get uart_port structure\n");
 		rc = -ENODEV;
 		goto err_out_notif_unreg;
 	}
 
+	/* At this point, we've got an empty uart_port struct, initialize it */
+	spin_lock_init(&port->lock);
+	port->membase	= NULL;
+	port->irq	= 0;
+	port->type	= PORT_UNKNOWN;
+	port->iotype	= UPIO_MEM32;
+	port->flags	= UPF_BOOT_AUTOCONF;
+	port->ops	= &cdns_uart_ops;
+	port->fifosize	= CDNS_UART_FIFO_SIZE;
+	port->line	= id;
+	port->dev	= NULL;
+
 	/*
 	 * Register the port.
 	 * This function also registers this device with the tty layer
@@ -1579,6 +1538,17 @@ static int cdns_uart_probe(struct platform_device *pdev)
 	pm_runtime_set_active(&pdev->dev);
 	pm_runtime_enable(&pdev->dev);
 
+#ifdef CONFIG_SERIAL_XILINX_PS_UART_CONSOLE
+	/*
+	 * If console hasn't been found yet try to assign this port
+	 * because it is required to be assigned for console setup function.
+	 * If register_console() don't assign value, then console_port pointer
+	 * is cleanup.
+	 */
+	if (cdns_uart_uart_driver.cons->index == -1)
+		console_port = port;
+#endif
+
 	rc = uart_add_one_port(&cdns_uart_uart_driver, port);
 	if (rc) {
 		dev_err(&pdev->dev,
@@ -1586,6 +1556,12 @@ static int cdns_uart_probe(struct platform_device *pdev)
 		goto err_out_pm_disable;
 	}
 
+#ifdef CONFIG_SERIAL_XILINX_PS_UART_CONSOLE
+	/* This is not port which is used for console that's why clean it up */
+	if (cdns_uart_uart_driver.cons->index == -1)
+		console_port = NULL;
+#endif
+
 	return 0;
 
 err_out_pm_disable: