Merge tag 'tty-3.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty into next

Pull tty/serial driver updates from Greg KH:
 "Here is the big tty / serial driver pull request for 3.16-rc1.

  A variety of different serial driver fixes and updates and additions,
  nothing huge, and no real major core tty changes at all.

  All have been in linux-next for a while"

* tag 'tty-3.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (84 commits)
  Revert "serial: imx: remove the DMA wait queue"
  serial: kgdb_nmi: Improve console integration with KDB I/O
  serial: kgdb_nmi: Switch from tasklets to real timers
  serial: kgdb_nmi: Use container_of() to locate private data
  serial: cpm_uart: No LF conversion in put_poll_char()
  serial: sirf: Fix compilation failure
  console: Remove superfluous readonly check
  console: Use explicit pointer type for vc_uni_pagedir* fields
  vgacon: Fix & cleanup refcounting
  ARM: tty: Move HVC DCC assembly to arch/arm
  tty/hvc/hvc_console: Fix wakeup of HVC thread on hvc_kick()
  drivers/tty/n_hdlc.c: replace kmalloc/memset by kzalloc
  vt: emulate 8- and 24-bit colour codes.
  printk/of_serial: fix serial console cessation part way through boot.
  serial: 8250_dma: check the result of TX buffer mapping
  serial: uart: add hw flow control support configuration
  tty/serial: at91: add interrupts for modem control lines
  tty/serial: at91: use mctrl_gpio helpers
  tty/serial: Add GPIOLIB helpers for controlling modem lines
  ARM: at91: gpio: implement get_direction
  ...

4 files changed, 3 insertions, 166 deletions

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index e759af5d709..f5f63b715d9 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -112,6 +112,9 @@ config IOMMU_HELPER
 config KERNEL_MODE_NEON
 	def_bool y
 
+config FIX_EARLYCON_MEM
+	def_bool y
+
 source "init/Kconfig"
 
 source "kernel/Kconfig.freezer"
diff --git a/arch/arm64/Kconfig.debug b/arch/arm64/Kconfig.debug
index d10ec334c93..1c1b7562984 100644
--- a/arch/arm64/Kconfig.debug
+++ b/arch/arm64/Kconfig.debug
@@ -20,15 +20,6 @@ config STRICT_DEVMEM
 
 	  If in doubt, say Y.
 
-config EARLY_PRINTK
-	bool "Early printk support"
-	default y
-	help
-	  Say Y here if you want to have an early console using the
-	  earlyprintk=<name>[,<addr>][,<options>] kernel parameter. It
-	  is assumed that the early console device has been initialised
-	  by the boot loader prior to starting the Linux kernel.
-
 config PID_IN_CONTEXTIDR
 	bool "Write the current PID to the CONTEXTIDR register"
 	help
diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile
index 7d811d9522b..7a6fce5167e 100644
--- a/arch/arm64/kernel/Makefile
+++ b/arch/arm64/kernel/Makefile
@@ -18,7 +18,6 @@ arm64-obj-$(CONFIG_SMP)			+= smp.o smp_spin_table.o topology.o
 arm64-obj-$(CONFIG_PERF_EVENTS)		+= perf_regs.o
 arm64-obj-$(CONFIG_HW_PERF_EVENTS)	+= perf_event.o
 arm64-obj-$(CONFIG_HAVE_HW_BREAKPOINT)	+= hw_breakpoint.o
-arm64-obj-$(CONFIG_EARLY_PRINTK)	+= early_printk.o
 arm64-obj-$(CONFIG_ARM64_CPU_SUSPEND)	+= sleep.o suspend.o
 arm64-obj-$(CONFIG_JUMP_LABEL)		+= jump_label.o
 arm64-obj-$(CONFIG_KGDB)		+= kgdb.o
diff --git a/arch/arm64/kernel/early_printk.c b/arch/arm64/kernel/early_printk.c
deleted file mode 100644
index 2dc36d00add..00000000000
--- a/arch/arm64/kernel/early_printk.c
+++ /dev/null
@@ -1,156 +0,0 @@
-/*
- * Earlyprintk support.
- *
- * Copyright (C) 2012 ARM Ltd.
- * Author: Catalin Marinas <catalin.marinas@arm.com>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-#include <linux/kernel.h>
-#include <linux/console.h>
-#include <linux/init.h>
-#include <linux/string.h>
-#include <linux/mm.h>
-#include <linux/io.h>
-
-#include <linux/amba/serial.h>
-#include <linux/serial_reg.h>
-
-#include <asm/fixmap.h>
-
-static void __iomem *early_base;
-static void (*printch)(char ch);
-
-/*
- * PL011 single character TX.
- */
-static void pl011_printch(char ch)
-{
-	while (readl_relaxed(early_base + UART01x_FR) & UART01x_FR_TXFF)
-		;
-	writeb_relaxed(ch, early_base + UART01x_DR);
-	while (readl_relaxed(early_base + UART01x_FR) & UART01x_FR_BUSY)
-		;
-}
-
-/*
- * Semihosting-based debug console
- */
-static void smh_printch(char ch)
-{
-	asm volatile("mov  x1, %0\n"
-		     "mov  x0, #3\n"
-		     "hlt  0xf000\n"
-		     : : "r" (&ch) : "x0", "x1", "memory");
-}
-
-/*
- * 8250/16550 (8-bit aligned registers) single character TX.
- */
-static void uart8250_8bit_printch(char ch)
-{
-	while (!(readb_relaxed(early_base + UART_LSR) & UART_LSR_THRE))
-		;
-	writeb_relaxed(ch, early_base + UART_TX);
-}
-
-/*
- * 8250/16550 (32-bit aligned registers) single character TX.
- */
-static void uart8250_32bit_printch(char ch)
-{
-	while (!(readl_relaxed(early_base + (UART_LSR << 2)) & UART_LSR_THRE))
-		;
-	writel_relaxed(ch, early_base + (UART_TX << 2));
-}
-
-struct earlycon_match {
-	const char *name;
-	void (*printch)(char ch);
-};
-
-static const struct earlycon_match earlycon_match[] __initconst = {
-	{ .name = "pl011", .printch = pl011_printch, },
-	{ .name = "smh", .printch = smh_printch, },
-	{ .name = "uart8250-8bit", .printch = uart8250_8bit_printch, },
-	{ .name = "uart8250-32bit", .printch = uart8250_32bit_printch, },
-	{}
-};
-
-static void early_write(struct console *con, const char *s, unsigned n)
-{
-	while (n-- > 0) {
-		if (*s == '\n')
-			printch('\r');
-		printch(*s);
-		s++;
-	}
-}
-
-static struct console early_console_dev = {
-	.name =		"earlycon",
-	.write =	early_write,
-	.flags =	CON_PRINTBUFFER | CON_BOOT,
-	.index =	-1,
-};
-
-/*
- * Parse earlyprintk=... parameter in the format:
- *
- *   <name>[,<addr>][,<options>]
- *
- * and register the early console. It is assumed that the UART has been
- * initialised by the bootloader already.
- */
-static int __init setup_early_printk(char *buf)
-{
-	const struct earlycon_match *match = earlycon_match;
-	phys_addr_t paddr = 0;
-
-	if (!buf) {
-		pr_warning("No earlyprintk arguments passed.\n");
-		return 0;
-	}
-
-	while (match->name) {
-		size_t len = strlen(match->name);
-		if (!strncmp(buf, match->name, len)) {
-			buf += len;
-			break;
-		}
-		match++;
-	}
-	if (!match->name) {
-		pr_warning("Unknown earlyprintk arguments: %s\n", buf);
-		return 0;
-	}
-
-	/* I/O address */
-	if (!strncmp(buf, ",0x", 3)) {
-		char *e;
-		paddr = simple_strtoul(buf + 1, &e, 16);
-		buf = e;
-	}
-	/* no options parsing yet */
-
-	if (paddr)
-		early_base = (void __iomem *)set_fixmap_offset_io(FIX_EARLYCON_MEM_BASE, paddr);
-
-	printch = match->printch;
-	early_console = &early_console_dev;
-	register_console(&early_console_dev);
-
-	return 0;
-}
-
-early_param("earlyprintk", setup_early_printk);