Merge tag 'tty-3.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty / serial driver update from Greg KH:
 "Here's the big tty / serial driver update for 3.17-rc1.

  Nothing major, just a number of fixes and new features for different
  serial drivers, and some more tty core fixes and documentation of the
  tty locks.

  All of these have been in linux-next for a while"

* tag 'tty-3.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (82 commits)
  tty/n_gsm.c: fix a memory leak in gsmld_open
  pch_uart: don't hardcode PCI slot to get DMA device
  tty: n_gsm, use setup_timer
  Revert "ARC: [arcfpga] stdout-path now suffices for earlycon/console"
  serial: sc16is7xx: Correct initialization of s->clk
  serial: 8250_dw: Add support for deferred probing
  serial: 8250_dw: Add optional reset control support
  serial: st-asc: Fix overflow in baudrate calculation
  serial: st-asc: Don't call BUG in asc_console_setup()
  tty: serial: msm: Make of_device_id array const
  tty/n_gsm.c: get gsm->num after gsm_activate_mux
  serial/core: Fix too big allocation for attribute member
  drivers/tty/serial: use correct type for dma_map/unmap
  serial: altera_jtaguart: Fix putchar function passed to uart_console_write()
  serial/uart/8250: Add tunable RX interrupt trigger I/F of FIFO buffers
  Serial: allow port drivers to have a default attribute group
  tty: kgdb_nmi: Automatically manage tty enable
  serial: altera_jtaguart: Adpot uart_console_write()
  serial: samsung: improve code clarity by defining a variable
  serial: samsung: correct the case and default order in switch
  ...

12 files changed, 53 insertions, 117 deletions

diff --git a/arch/arc/boot/dts/angel4.dts b/arch/arc/boot/dts/angel4.dts
index 5bb2fdaca02f..6b57475967a6 100644
--- a/arch/arc/boot/dts/angel4.dts
+++ b/arch/arc/boot/dts/angel4.dts
@@ -17,7 +17,7 @@
 	interrupt-parent = <&intc>;
 
 	chosen {
-		bootargs = "console=ttyARC0,115200n8 earlyprintk=ttyARC0";
+		bootargs = "earlycon=arc_uart,mmio32,0xc0fc1000,115200n8 console=ttyARC0,115200n8";
 	};
 
 	aliases {
diff --git a/arch/arc/plat-arcfpga/Kconfig b/arch/arc/plat-arcfpga/Kconfig
index e27bb5cc3c1e..b9f34cf55acf 100644
--- a/arch/arc/plat-arcfpga/Kconfig
+++ b/arch/arc/plat-arcfpga/Kconfig
@@ -41,11 +41,4 @@ config ISS_SMP_EXTN
 	  -XTL (To enable CPU start/stop/set-PC for another CPU)
 	  It doesn't provide coherent Caches and/or Atomic Ops (LLOCK/SCOND)
 
-config ARC_SERIAL_BAUD
-	int "UART Baud rate"
-	default "115200"
-	depends on SERIAL_ARC || SERIAL_ARC_CONSOLE
-	help
-	  Baud rate for the ARC UART
-
 endif
diff --git a/arch/arc/plat-arcfpga/platform.c b/arch/arc/plat-arcfpga/platform.c
index 61c7e5997387..b8d0d456627f 100644
--- a/arch/arc/plat-arcfpga/platform.c
+++ b/arch/arc/plat-arcfpga/platform.c
@@ -22,115 +22,22 @@
 #include <plat/smp.h>
 #include <plat/irq.h>
 
-/*----------------------- Platform Devices -----------------------------*/
-
-#if IS_ENABLED(CONFIG_SERIAL_ARC)
-static unsigned long arc_uart_info[] = {
-	0,	/* uart->is_emulated (runtime @running_on_hw) */
-	0,	/* uart->port.uartclk */
-	0,	/* uart->baud */
-	0
-};
-
-#if defined(CONFIG_SERIAL_ARC_CONSOLE)
-/*
- * static platform data - but only for early serial
- * TBD: derive this from a special DT node
- */
-static struct resource arc_uart0_res[] = {
-	{
-		.start = UART0_BASE,
-		.end   = UART0_BASE + 0xFF,
-		.flags = IORESOURCE_MEM,
-	},
-	{
-		.start = UART0_IRQ,
-		.end   = UART0_IRQ,
-		.flags = IORESOURCE_IRQ,
-	},
-};
-
-static struct platform_device arc_uart0_dev = {
-	.name = "arc-uart",
-	.id = 0,
-	.num_resources = ARRAY_SIZE(arc_uart0_res),
-	.resource = arc_uart0_res,
-	.dev = {
-		.platform_data = &arc_uart_info,
-	},
-};
-
-static struct platform_device *fpga_early_devs[] __initdata = {
-	&arc_uart0_dev,
-};
-#endif	/* CONFIG_SERIAL_ARC_CONSOLE */
-
-static void arc_fpga_serial_init(void)
-{
-	/* To let driver workaround ISS bug: baudh Reg can't be set to 0 */
-	arc_uart_info[0] = !running_on_hw;
-
-	arc_uart_info[1] = arc_get_core_freq();
-
-	arc_uart_info[2] = CONFIG_ARC_SERIAL_BAUD;
-
-#if defined(CONFIG_SERIAL_ARC_CONSOLE)
-	early_platform_add_devices(fpga_early_devs,
-				   ARRAY_SIZE(fpga_early_devs));
-
-	/*
-	 * ARC console driver registers (build time) as an early platform driver
-	 * of class "earlyprintk". However it needs explicit cmdline toggle
-	 * "earlyprintk=ttyARC0" to be successfuly runtime registered.
-	 * Otherwise the early probe below fails to find the driver
-	 */
-	early_platform_driver_probe("earlyprintk", 1, 0);
-
-	/*
-	 * This is to make sure that arc uart would be preferred console
-	 * despite one/more of following:
-	 *   -command line lacked "console=ttyARC0" or
-	 *   -CONFIG_VT_CONSOLE was enabled (for no reason whatsoever)
-	 * Note that this needs to be done after above early console is reg,
-	 * otherwise the early console never gets a chance to run.
-	 */
-	add_preferred_console("ttyARC", 0, "115200");
-#endif	/* CONFIG_SERIAL_ARC_CONSOLE */
-}
-#else	/* !IS_ENABLED(CONFIG_SERIAL_ARC) */
-static void arc_fpga_serial_init(void)
-{
-}
-#endif
-
 static void __init plat_fpga_early_init(void)
 {
 	pr_info("[plat-arcfpga]: registering early dev resources\n");
 
-	arc_fpga_serial_init();
-
 #ifdef CONFIG_ISS_SMP_EXTN
 	iss_model_init_early_smp();
 #endif
 }
 
-static struct of_dev_auxdata plat_auxdata_lookup[] __initdata = {
-#if IS_ENABLED(CONFIG_SERIAL_ARC)
-	OF_DEV_AUXDATA("snps,arc-uart", UART0_BASE, "arc-uart", arc_uart_info),
-#endif
-	{}
-};
-
 static void __init plat_fpga_populate_dev(void)
 {
-	pr_info("[plat-arcfpga]: registering device resources\n");
-
 	/*
 	 * Traverses flattened DeviceTree - registering platform devices
-	 * complete with their resources
+	 * (if any) complete with their resources
 	 */
-	of_platform_populate(NULL, of_default_bus_match_table,
-			     plat_auxdata_lookup, NULL);
+	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
 }
 
 /*----------------------- Machine Descriptions ------------------------------
diff --git a/arch/arm/boot/dts/exynos3250.dtsi b/arch/arm/boot/dts/exynos3250.dtsi
index aaaac7981200..94d59983fc2d 100644
--- a/arch/arm/boot/dts/exynos3250.dtsi
+++ b/arch/arm/boot/dts/exynos3250.dtsi
@@ -39,6 +39,8 @@
 		i2c5 = &i2c_5;
 		i2c6 = &i2c_6;
 		i2c7 = &i2c_7;
+		serial0 = &serial_0;
+		serial1 = &serial_1;
 	};
 
 	cpus {
diff --git a/arch/arm/boot/dts/exynos4.dtsi b/arch/arm/boot/dts/exynos4.dtsi
index 17b22e9cc2aa..93bcc1fe8a4e 100644
--- a/arch/arm/boot/dts/exynos4.dtsi
+++ b/arch/arm/boot/dts/exynos4.dtsi
@@ -44,6 +44,10 @@
 		fimc1 = &fimc_1;
 		fimc2 = &fimc_2;
 		fimc3 = &fimc_3;
+		serial0 = &serial_0;
+		serial1 = &serial_1;
+		serial2 = &serial_2;
+		serial3 = &serial_3;
 	};
 
 	clock_audss: clock-controller@03810000 {
@@ -363,7 +367,7 @@
 		status = "disabled";
 	};
 
-	serial@13800000 {
+	serial_0: serial@13800000 {
 		compatible = "samsung,exynos4210-uart";
 		reg = <0x13800000 0x100>;
 		interrupts = <0 52 0>;
@@ -372,7 +376,7 @@
 		status = "disabled";
 	};
 
-	serial@13810000 {
+	serial_1: serial@13810000 {
 		compatible = "samsung,exynos4210-uart";
 		reg = <0x13810000 0x100>;
 		interrupts = <0 53 0>;
@@ -381,7 +385,7 @@
 		status = "disabled";
 	};
 
-	serial@13820000 {
+	serial_2: serial@13820000 {
 		compatible = "samsung,exynos4210-uart";
 		reg = <0x13820000 0x100>;
 		interrupts = <0 54 0>;
@@ -390,7 +394,7 @@
 		status = "disabled";
 	};
 
-	serial@13830000 {
+	serial_3: serial@13830000 {
 		compatible = "samsung,exynos4210-uart";
 		reg = <0x13830000 0x100>;
 		interrupts = <0 55 0>;
diff --git a/arch/arm/boot/dts/exynos5.dtsi b/arch/arm/boot/dts/exynos5.dtsi
index 79d0608d6dcc..ff2d2cb0f79e 100644
--- a/arch/arm/boot/dts/exynos5.dtsi
+++ b/arch/arm/boot/dts/exynos5.dtsi
@@ -18,6 +18,13 @@
 / {
 	interrupt-parent = <&gic>;
 
+	aliases {
+		serial0 = &serial_0;
+		serial1 = &serial_1;
+		serial2 = &serial_2;
+		serial3 = &serial_3;
+	};
+
 	chipid@10000000 {
 		compatible = "samsung,exynos4210-chipid";
 		reg = <0x10000000 0x100>;
@@ -50,25 +57,25 @@
 		interrupts = <1 9 0xf04>;
 	};
 
-	serial@12C00000 {
+	serial_0: serial@12C00000 {
 		compatible = "samsung,exynos4210-uart";
 		reg = <0x12C00000 0x100>;
 		interrupts = <0 51 0>;
 	};
 
-	serial@12C10000 {
+	serial_1: serial@12C10000 {
 		compatible = "samsung,exynos4210-uart";
 		reg = <0x12C10000 0x100>;
 		interrupts = <0 52 0>;
 	};
 
-	serial@12C20000 {
+	serial_2: serial@12C20000 {
 		compatible = "samsung,exynos4210-uart";
 		reg = <0x12C20000 0x100>;
 		interrupts = <0 53 0>;
 	};
 
-	serial@12C30000 {
+	serial_3: serial@12C30000 {
 		compatible = "samsung,exynos4210-uart";
 		reg = <0x12C30000 0x100>;
 		interrupts = <0 54 0>;
diff --git a/arch/arm/boot/dts/exynos5260.dtsi b/arch/arm/boot/dts/exynos5260.dtsi
index 5398a60207ca..4539a0ae714d 100644
--- a/arch/arm/boot/dts/exynos5260.dtsi
+++ b/arch/arm/boot/dts/exynos5260.dtsi
@@ -21,6 +21,10 @@
 		pinctrl0 = &pinctrl_0;
 		pinctrl1 = &pinctrl_1;
 		pinctrl2 = &pinctrl_2;
+		serial0 = &uart0;
+		serial1 = &uart1;
+		serial2 = &uart2;
+		serial3 = &uart3;
 	};
 
 	cpus {
diff --git a/arch/arm/boot/dts/exynos5410.dtsi b/arch/arm/boot/dts/exynos5410.dtsi
index 3839c26f467f..52070e54589a 100644
--- a/arch/arm/boot/dts/exynos5410.dtsi
+++ b/arch/arm/boot/dts/exynos5410.dtsi
@@ -20,6 +20,12 @@
 	compatible = "samsung,exynos5410", "samsung,exynos5";
 	interrupt-parent = <&gic>;
 
+	aliases {
+		serial0 = &uart0;
+		serial1 = &uart1;
+		serial2 = &uart2;
+	};
+
 	cpus {
 		#address-cells = <1>;
 		#size-cells = <0>;
diff --git a/arch/arm/boot/dts/exynos5440.dtsi b/arch/arm/boot/dts/exynos5440.dtsi
index ae3a17c791f6..8f3373cd7b87 100644
--- a/arch/arm/boot/dts/exynos5440.dtsi
+++ b/arch/arm/boot/dts/exynos5440.dtsi
@@ -18,6 +18,8 @@
 	interrupt-parent = <&gic>;
 
 	aliases {
+		serial0 = &serial_0;
+		serial1 = &serial_1;
 		spi0 = &spi_0;
 		tmuctrl0 = &tmuctrl_0;
 		tmuctrl1 = &tmuctrl_1;
@@ -102,7 +104,7 @@
 		>;
 	};
 
-	serial@B0000 {
+	serial_0: serial@B0000 {
 		compatible = "samsung,exynos4210-uart";
 		reg = <0xB0000 0x1000>;
 		interrupts = <0 2 0>;
@@ -110,7 +112,7 @@
 		clock-names = "uart", "clk_uart_baud0";
 	};
 
-	serial@C0000 {
+	serial_1: serial@C0000 {
 		compatible = "samsung,exynos4210-uart";
 		reg = <0xC0000 0x1000>;
 		interrupts = <0 3 0>;
diff --git a/arch/arm/boot/dts/s3c2416.dtsi b/arch/arm/boot/dts/s3c2416.dtsi
index 955e4a4f8c31..30b8f7e47454 100644
--- a/arch/arm/boot/dts/s3c2416.dtsi
+++ b/arch/arm/boot/dts/s3c2416.dtsi
@@ -16,6 +16,10 @@
 	model = "Samsung S3C2416 SoC";
 	compatible = "samsung,s3c2416";
 
+	aliases {
+		serial3 = &uart3;
+	};
+
 	cpus {
 		#address-cells = <1>;
 		#size-cells = <0>;
@@ -68,7 +72,7 @@
 				<&clocks SCLK_UART>;
 	};
 
-	serial@5000C000 {
+	uart3: serial@5000C000 {
 		compatible = "samsung,s3c2440-uart";
 		reg = <0x5000C000 0x4000>;
 		interrupts = <1 18 24 4>, <1 18 25 4>;
diff --git a/arch/arm/boot/dts/s3c24xx.dtsi b/arch/arm/boot/dts/s3c24xx.dtsi
index 2d1d7dc9418a..5ed43b857cc4 100644
--- a/arch/arm/boot/dts/s3c24xx.dtsi
+++ b/arch/arm/boot/dts/s3c24xx.dtsi
@@ -16,6 +16,9 @@
 
 	aliases {
 		pinctrl0 = &pinctrl_0;
+		serial0 = &uart0;
+		serial1 = &uart1;
+		serial2 = &uart2;
 	};
 
 	intc:interrupt-controller@4a000000 {
@@ -46,21 +49,21 @@
 		#pwm-cells = <4>;
 	};
 
-	serial@50000000 {
+	uart0: serial@50000000 {
 		compatible = "samsung,s3c2410-uart";
 		reg = <0x50000000 0x4000>;
 		interrupts = <1 28 0 4>, <1 28 1 4>;
 		status = "disabled";
 	};
 
-	serial@50004000 {
+	uart1: serial@50004000 {
 		compatible = "samsung,s3c2410-uart";
 		reg = <0x50004000 0x4000>;
 		interrupts = <1 23 3 4>, <1 23 4 4>;
 		status = "disabled";
 	};
 
-	serial@50008000 {
+	uart2: serial@50008000 {
 		compatible = "samsung,s3c2410-uart";
 		reg = <0x50008000 0x4000>;
 		interrupts = <1 15 6 4>, <1 15 7 4>;
diff --git a/arch/arm/boot/dts/s3c64xx.dtsi b/arch/arm/boot/dts/s3c64xx.dtsi
index 4e3be4d3493d..ff5bdaac987a 100644
--- a/arch/arm/boot/dts/s3c64xx.dtsi
+++ b/arch/arm/boot/dts/s3c64xx.dtsi
@@ -23,6 +23,10 @@
 	aliases {
 		i2c0 = &i2c0;
 		pinctrl0 = &pinctrl0;
+		serial0 = &uart0;
+		serial1 = &uart1;
+		serial2 = &uart2;
+		serial3 = &uart3;
 	};
 
 	cpus {