ANDROID: fiq_debugger: remove

This represents a rollup of a series of reverts, simplified are
modifications to remove fiq_glue and fiq_debugger references in:

arch/arm/common/Kconfig
arch/arm/common/Makefile
drivers/staging/android/Kconfig
drivers/staging/android/Makefile

And deletion of:

arch/arm/common/fiq_glue.S
arch/arm/common/fiq_glue_setup.c
drivers/staging/android/fiq_debugger/

Signed-off-by: Mark Salyzyn <salyzyn@google.com>
Bug: 32402555
Bug: 36101220
Change-Id: I3f74b1ff5e4971d619bcb37a911fed68fbb538d5
diff --git a/arch/arm/common/Kconfig b/arch/arm/common/Kconfig
index ce01364..9353184 100644
--- a/arch/arm/common/Kconfig
+++ b/arch/arm/common/Kconfig
@@ -17,7 +17,3 @@
 
 config SHARP_SCOOP
 	bool
-
-config FIQ_GLUE
-	bool
-	select FIQ
diff --git a/arch/arm/common/Makefile b/arch/arm/common/Makefile
index 04aca89..27f23b1 100644
--- a/arch/arm/common/Makefile
+++ b/arch/arm/common/Makefile
@@ -4,7 +4,6 @@
 
 obj-y				+= firmware.o
 
-obj-$(CONFIG_FIQ_GLUE)		+= fiq_glue.o fiq_glue_setup.o
 obj-$(CONFIG_ICST)		+= icst.o
 obj-$(CONFIG_SA1111)		+= sa1111.o
 obj-$(CONFIG_DMABOUNCE)		+= dmabounce.o
diff --git a/arch/arm/common/fiq_glue.S b/arch/arm/common/fiq_glue.S
deleted file mode 100644
index 24b42ce..0000000
--- a/arch/arm/common/fiq_glue.S
+++ /dev/null
@@ -1,118 +0,0 @@
-/*
- * Copyright (C) 2008 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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.
- *
- */
-
-#include <linux/linkage.h>
-#include <asm/assembler.h>
-
-		.text
-
-		.global fiq_glue_end
-
-		/* fiq stack: r0-r15,cpsr,spsr of interrupted mode */
-
-ENTRY(fiq_glue)
-		/* store pc, cpsr from previous mode, reserve space for spsr */
-		mrs	r12, spsr
-		sub	lr, lr, #4
-		subs	r10, #1
-		bne	nested_fiq
-
-		str	r12, [sp, #-8]!
-		str	lr, [sp, #-4]!
-
-		/* store r8-r14 from previous mode */
-		sub	sp, sp, #(7 * 4)
-		stmia	sp, {r8-r14}^
-		nop
-
-		/* store r0-r7 from previous mode */
-		stmfd	sp!, {r0-r7}
-
-		/* setup func(data,regs) arguments */
-		mov	r0, r9
-		mov	r1, sp
-		mov	r3, r8
-
-		mov	r7, sp
-
-		/* Get sp and lr from non-user modes */
-		and	r4, r12, #MODE_MASK
-		cmp	r4, #USR_MODE
-		beq	fiq_from_usr_mode
-
-		mov	r7, sp
-		orr	r4, r4, #(PSR_I_BIT | PSR_F_BIT)
-		msr	cpsr_c, r4
-		str	sp, [r7, #(4 * 13)]
-		str	lr, [r7, #(4 * 14)]
-		mrs	r5, spsr
-		str	r5, [r7, #(4 * 17)]
-
-		cmp	r4, #(SVC_MODE | PSR_I_BIT | PSR_F_BIT)
-		/* use fiq stack if we reenter this mode */
-		subne	sp, r7, #(4 * 3)
-
-fiq_from_usr_mode:
-		msr	cpsr_c, #(SVC_MODE | PSR_I_BIT | PSR_F_BIT)
-		mov	r2, sp
-		sub	sp, r7, #12
-		stmfd	sp!, {r2, ip, lr}
-		/* call func(data,regs) */
-		blx	r3
-		ldmfd	sp, {r2, ip, lr}
-		mov	sp, r2
-
-		/* restore/discard saved state */
-		cmp	r4, #USR_MODE
-		beq	fiq_from_usr_mode_exit
-
-		msr	cpsr_c, r4
-		ldr	sp, [r7, #(4 * 13)]
-		ldr	lr, [r7, #(4 * 14)]
-		msr	spsr_cxsf, r5
-
-fiq_from_usr_mode_exit:
-		msr	cpsr_c, #(FIQ_MODE | PSR_I_BIT | PSR_F_BIT)
-
-		ldmfd	sp!, {r0-r7}
-		ldr	lr, [sp, #(4 * 7)]
-		ldr	r12, [sp, #(4 * 8)]
-		add	sp, sp, #(10 * 4)
-exit_fiq:
-		msr	spsr_cxsf, r12
-		add	r10, #1
-		cmp	r11, #0
-		moveqs	pc, lr
-		bx	r11 /* jump to custom fiq return function */
-
-nested_fiq:
-		orr	r12, r12, #(PSR_F_BIT)
-		b	exit_fiq
-
-fiq_glue_end:
-
-ENTRY(fiq_glue_setup) /* func, data, sp, smc call number */
-		stmfd		sp!, {r4}
-		mrs		r4, cpsr
-		msr		cpsr_c, #(FIQ_MODE | PSR_I_BIT | PSR_F_BIT)
-		movs		r8, r0
-		mov		r9, r1
-		mov		sp, r2
-		mov		r11, r3
-		moveq		r10, #0
-		movne		r10, #1
-		msr		cpsr_c, r4
-		ldmfd		sp!, {r4}
-		bx		lr
-
diff --git a/arch/arm/common/fiq_glue_setup.c b/arch/arm/common/fiq_glue_setup.c
deleted file mode 100644
index 8cb1b61..0000000
--- a/arch/arm/common/fiq_glue_setup.c
+++ /dev/null
@@ -1,147 +0,0 @@
-/*
- * Copyright (C) 2010 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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.
- */
-
-#include <linux/kernel.h>
-#include <linux/percpu.h>
-#include <linux/slab.h>
-#include <asm/fiq.h>
-#include <asm/fiq_glue.h>
-
-extern unsigned char fiq_glue, fiq_glue_end;
-extern void fiq_glue_setup(void *func, void *data, void *sp,
-			   fiq_return_handler_t fiq_return_handler);
-
-static struct fiq_handler fiq_debbuger_fiq_handler = {
-	.name = "fiq_glue",
-};
-DEFINE_PER_CPU(void *, fiq_stack);
-static struct fiq_glue_handler *current_handler;
-static fiq_return_handler_t fiq_return_handler;
-static DEFINE_MUTEX(fiq_glue_lock);
-
-static void fiq_glue_setup_helper(void *info)
-{
-	struct fiq_glue_handler *handler = info;
-	fiq_glue_setup(handler->fiq, handler,
-		__get_cpu_var(fiq_stack) + THREAD_START_SP,
-		fiq_return_handler);
-}
-
-int fiq_glue_register_handler(struct fiq_glue_handler *handler)
-{
-	int ret;
-	int cpu;
-
-	if (!handler || !handler->fiq)
-		return -EINVAL;
-
-	mutex_lock(&fiq_glue_lock);
-	if (fiq_stack) {
-		ret = -EBUSY;
-		goto err_busy;
-	}
-
-	for_each_possible_cpu(cpu) {
-		void *stack;
-		stack = (void *)__get_free_pages(GFP_KERNEL, THREAD_SIZE_ORDER);
-		if (WARN_ON(!stack)) {
-			ret = -ENOMEM;
-			goto err_alloc_fiq_stack;
-		}
-		per_cpu(fiq_stack, cpu) = stack;
-	}
-
-	ret = claim_fiq(&fiq_debbuger_fiq_handler);
-	if (WARN_ON(ret))
-		goto err_claim_fiq;
-
-	current_handler = handler;
-	on_each_cpu(fiq_glue_setup_helper, handler, true);
-	set_fiq_handler(&fiq_glue, &fiq_glue_end - &fiq_glue);
-
-	mutex_unlock(&fiq_glue_lock);
-	return 0;
-
-err_claim_fiq:
-err_alloc_fiq_stack:
-	for_each_possible_cpu(cpu) {
-		__free_pages(per_cpu(fiq_stack, cpu), THREAD_SIZE_ORDER);
-		per_cpu(fiq_stack, cpu) = NULL;
-	}
-err_busy:
-	mutex_unlock(&fiq_glue_lock);
-	return ret;
-}
-
-static void fiq_glue_update_return_handler(void (*fiq_return)(void))
-{
-	fiq_return_handler = fiq_return;
-	if (current_handler)
-		on_each_cpu(fiq_glue_setup_helper, current_handler, true);
-}
-
-int fiq_glue_set_return_handler(void (*fiq_return)(void))
-{
-	int ret;
-
-	mutex_lock(&fiq_glue_lock);
-	if (fiq_return_handler) {
-		ret = -EBUSY;
-		goto err_busy;
-	}
-	fiq_glue_update_return_handler(fiq_return);
-	ret = 0;
-err_busy:
-	mutex_unlock(&fiq_glue_lock);
-
-	return ret;
-}
-EXPORT_SYMBOL(fiq_glue_set_return_handler);
-
-int fiq_glue_clear_return_handler(void (*fiq_return)(void))
-{
-	int ret;
-
-	mutex_lock(&fiq_glue_lock);
-	if (WARN_ON(fiq_return_handler != fiq_return)) {
-		ret = -EINVAL;
-		goto err_inval;
-	}
-	fiq_glue_update_return_handler(NULL);
-	ret = 0;
-err_inval:
-	mutex_unlock(&fiq_glue_lock);
-
-	return ret;
-}
-EXPORT_SYMBOL(fiq_glue_clear_return_handler);
-
-/**
- * fiq_glue_resume - Restore fiqs after suspend or low power idle states
- *
- * This must be called before calling local_fiq_enable after returning from a
- * power state where the fiq mode registers were lost. If a driver provided
- * a resume hook when it registered the handler it will be called.
- */
-
-void fiq_glue_resume(void)
-{
-	if (!current_handler)
-		return;
-	fiq_glue_setup(current_handler->fiq, current_handler,
-		__get_cpu_var(fiq_stack) + THREAD_START_SP,
-		fiq_return_handler);
-	if (current_handler->resume)
-		current_handler->resume(current_handler);
-}
-
diff --git a/drivers/staging/android/Kconfig b/drivers/staging/android/Kconfig
index a17c483..8f548691 100644
--- a/drivers/staging/android/Kconfig
+++ b/drivers/staging/android/Kconfig
@@ -44,8 +44,6 @@
 
 source "drivers/staging/android/ion/Kconfig"
 
-source "drivers/staging/android/fiq_debugger/Kconfig"
-
 endif # if ANDROID
 
 endmenu
diff --git a/drivers/staging/android/Makefile b/drivers/staging/android/Makefile
index 93c5f5a..3482d43c 100644
--- a/drivers/staging/android/Makefile
+++ b/drivers/staging/android/Makefile
@@ -1,7 +1,6 @@
 ccflags-y += -I$(src)			# needed for trace events
 
 obj-y					+= ion/
-obj-$(CONFIG_FIQ_DEBUGGER)		+= fiq_debugger/
 
 obj-$(CONFIG_ASHMEM)			+= ashmem.o
 obj-$(CONFIG_ANDROID_LOW_MEMORY_KILLER)	+= lowmemorykiller.o
diff --git a/drivers/staging/android/fiq_debugger/Kconfig b/drivers/staging/android/fiq_debugger/Kconfig
deleted file mode 100644
index 60fc224..0000000
--- a/drivers/staging/android/fiq_debugger/Kconfig
+++ /dev/null
@@ -1,58 +0,0 @@
-config FIQ_DEBUGGER
-	bool "FIQ Mode Serial Debugger"
-	default n
-	depends on ARM || ARM64
-	help
-	  The FIQ serial debugger can accept commands even when the
-	  kernel is unresponsive due to being stuck with interrupts
-	  disabled.
-
-config FIQ_DEBUGGER_NO_SLEEP
-	bool "Keep serial debugger active"
-	depends on FIQ_DEBUGGER
-	default n
-	help
-	  Enables the serial debugger at boot. Passing
-	  fiq_debugger.no_sleep on the kernel commandline will
-	  override this config option.
-
-config FIQ_DEBUGGER_WAKEUP_IRQ_ALWAYS_ON
-	bool "Don't disable wakeup IRQ when debugger is active"
-	depends on FIQ_DEBUGGER
-	default n
-	help
-	  Don't disable the wakeup irq when enabling the uart clock.  This will
-	  cause extra interrupts, but it makes the serial debugger usable with
-	  on some MSM radio builds that ignore the uart clock request in power
-	  collapse.
-
-config FIQ_DEBUGGER_CONSOLE
-	bool "Console on FIQ Serial Debugger port"
-	depends on FIQ_DEBUGGER
-	default n
-	help
-	  Enables a console so that printk messages are displayed on
-	  the debugger serial port as the occur.
-
-config FIQ_DEBUGGER_CONSOLE_DEFAULT_ENABLE
-	bool "Put the FIQ debugger into console mode by default"
-	depends on FIQ_DEBUGGER_CONSOLE
-	default n
-	help
-	  If enabled, this puts the fiq debugger into console mode by default.
-	  Otherwise, the fiq debugger will start out in debug mode.
-
-config FIQ_DEBUGGER_UART_OVERLAY
-	bool "Install uart DT overlay"
-	depends on FIQ_DEBUGGER
-	select OF_OVERLAY
-	default n
-	help
-	  If enabled, fiq debugger is calling fiq_debugger_uart_overlay()
-	  that will apply overlay uart_overlay@0 to disable proper uart.
-
-config FIQ_WATCHDOG
-	bool
-	select FIQ_DEBUGGER
-	select PSTORE_RAM
-	default n
diff --git a/drivers/staging/android/fiq_debugger/Makefile b/drivers/staging/android/fiq_debugger/Makefile
deleted file mode 100644
index a7ca487..0000000
--- a/drivers/staging/android/fiq_debugger/Makefile
+++ /dev/null
@@ -1,4 +0,0 @@
-obj-y			+= fiq_debugger.o
-obj-$(CONFIG_ARM)	+= fiq_debugger_arm.o
-obj-$(CONFIG_ARM64)	+= fiq_debugger_arm64.o
-obj-$(CONFIG_FIQ_WATCHDOG)	+= fiq_watchdog.o
diff --git a/drivers/staging/android/fiq_debugger/fiq_debugger.c b/drivers/staging/android/fiq_debugger/fiq_debugger.c
deleted file mode 100644
index 675b974..0000000
--- a/drivers/staging/android/fiq_debugger/fiq_debugger.c
+++ /dev/null
@@ -1,1246 +0,0 @@
-/*
- * drivers/staging/android/fiq_debugger.c
- *
- * Serial Debugger Interface accessed through an FIQ interrupt.
- *
- * Copyright (C) 2008 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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.
- */
-
-#include <stdarg.h>
-#include <linux/module.h>
-#include <linux/io.h>
-#include <linux/console.h>
-#include <linux/interrupt.h>
-#include <linux/clk.h>
-#include <linux/platform_device.h>
-#include <linux/kernel_stat.h>
-#include <linux/kmsg_dump.h>
-#include <linux/irq.h>
-#include <linux/delay.h>
-#include <linux/reboot.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/smp.h>
-#include <linux/timer.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-
-#ifdef CONFIG_FIQ_GLUE
-#include <asm/fiq_glue.h>
-#endif
-
-#ifdef CONFIG_FIQ_DEBUGGER_UART_OVERLAY
-#include <linux/of.h>
-#endif
-
-#include <linux/uaccess.h>
-
-#include "fiq_debugger.h"
-#include "fiq_debugger_priv.h"
-#include "fiq_debugger_ringbuf.h"
-
-#define DEBUG_MAX 64
-#define MAX_UNHANDLED_FIQ_COUNT 1000000
-
-#define MAX_FIQ_DEBUGGER_PORTS 4
-
-struct fiq_debugger_state {
-#ifdef CONFIG_FIQ_GLUE
-	struct fiq_glue_handler handler;
-#endif
-	struct fiq_debugger_output output;
-
-	int fiq;
-	int uart_irq;
-	int signal_irq;
-	int wakeup_irq;
-	bool wakeup_irq_no_set_wake;
-	struct clk *clk;
-	struct fiq_debugger_pdata *pdata;
-	struct platform_device *pdev;
-
-	char debug_cmd[DEBUG_MAX];
-	int debug_busy;
-	int debug_abort;
-
-	char debug_buf[DEBUG_MAX];
-	int debug_count;
-
-	bool no_sleep;
-	bool debug_enable;
-	bool ignore_next_wakeup_irq;
-	struct timer_list sleep_timer;
-	spinlock_t sleep_timer_lock;
-	bool uart_enabled;
-	struct wakeup_source debugger_wake_src;
-	bool console_enable;
-	int current_cpu;
-	atomic_t unhandled_fiq_count;
-	bool in_fiq;
-
-	struct work_struct work;
-	spinlock_t work_lock;
-	char work_cmd[DEBUG_MAX];
-
-#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
-	spinlock_t console_lock;
-	struct console console;
-	struct tty_port tty_port;
-	struct fiq_debugger_ringbuf *tty_rbuf;
-	bool syslog_dumping;
-#endif
-
-	unsigned int last_irqs[NR_IRQS];
-	unsigned int last_local_timer_irqs[NR_CPUS];
-};
-
-#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
-struct tty_driver *fiq_tty_driver;
-#endif
-
-#ifdef CONFIG_FIQ_DEBUGGER_NO_SLEEP
-static bool initial_no_sleep = true;
-#else
-static bool initial_no_sleep;
-#endif
-
-#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE_DEFAULT_ENABLE
-static bool initial_debug_enable = true;
-static bool initial_console_enable = true;
-#else
-static bool initial_debug_enable;
-static bool initial_console_enable;
-#endif
-
-static bool fiq_kgdb_enable;
-static bool fiq_debugger_disable;
-
-module_param_named(no_sleep, initial_no_sleep, bool, 0644);
-module_param_named(debug_enable, initial_debug_enable, bool, 0644);
-module_param_named(console_enable, initial_console_enable, bool, 0644);
-module_param_named(kgdb_enable, fiq_kgdb_enable, bool, 0644);
-module_param_named(disable, fiq_debugger_disable, bool, 0644);
-
-#ifdef CONFIG_FIQ_DEBUGGER_WAKEUP_IRQ_ALWAYS_ON
-static inline
-void fiq_debugger_enable_wakeup_irq(struct fiq_debugger_state *state) {}
-static inline
-void fiq_debugger_disable_wakeup_irq(struct fiq_debugger_state *state) {}
-#else
-static inline
-void fiq_debugger_enable_wakeup_irq(struct fiq_debugger_state *state)
-{
-	if (state->wakeup_irq < 0)
-		return;
-	enable_irq(state->wakeup_irq);
-	if (!state->wakeup_irq_no_set_wake)
-		enable_irq_wake(state->wakeup_irq);
-}
-static inline
-void fiq_debugger_disable_wakeup_irq(struct fiq_debugger_state *state)
-{
-	if (state->wakeup_irq < 0)
-		return;
-	disable_irq_nosync(state->wakeup_irq);
-	if (!state->wakeup_irq_no_set_wake)
-		disable_irq_wake(state->wakeup_irq);
-}
-#endif
-
-static inline bool fiq_debugger_have_fiq(struct fiq_debugger_state *state)
-{
-	return (state->fiq >= 0);
-}
-
-#ifdef CONFIG_FIQ_GLUE
-static void fiq_debugger_force_irq(struct fiq_debugger_state *state)
-{
-	unsigned int irq = state->signal_irq;
-
-	if (WARN_ON(!fiq_debugger_have_fiq(state)))
-		return;
-	if (state->pdata->force_irq) {
-		state->pdata->force_irq(state->pdev, irq);
-	} else {
-		struct irq_chip *chip = irq_get_chip(irq);
-		if (chip && chip->irq_retrigger)
-			chip->irq_retrigger(irq_get_irq_data(irq));
-	}
-}
-#endif
-
-static void fiq_debugger_uart_enable(struct fiq_debugger_state *state)
-{
-	if (state->clk)
-		clk_enable(state->clk);
-	if (state->pdata->uart_enable)
-		state->pdata->uart_enable(state->pdev);
-}
-
-static void fiq_debugger_uart_disable(struct fiq_debugger_state *state)
-{
-	if (state->pdata->uart_disable)
-		state->pdata->uart_disable(state->pdev);
-	if (state->clk)
-		clk_disable(state->clk);
-}
-
-static void fiq_debugger_uart_flush(struct fiq_debugger_state *state)
-{
-	if (state->pdata->uart_flush)
-		state->pdata->uart_flush(state->pdev);
-}
-
-static void fiq_debugger_putc(struct fiq_debugger_state *state, char c)
-{
-	state->pdata->uart_putc(state->pdev, c);
-}
-
-static void fiq_debugger_puts(struct fiq_debugger_state *state, char *s)
-{
-	unsigned c;
-	while ((c = *s++)) {
-		if (c == '\n')
-			fiq_debugger_putc(state, '\r');
-		fiq_debugger_putc(state, c);
-	}
-}
-
-static void fiq_debugger_prompt(struct fiq_debugger_state *state)
-{
-	fiq_debugger_puts(state, "debug> ");
-}
-
-static void fiq_debugger_dump_kernel_log(struct fiq_debugger_state *state)
-{
-	char buf[512];
-	size_t len;
-	struct kmsg_dumper dumper = { .active = true };
-
-
-	kmsg_dump_rewind_nolock(&dumper);
-	while (kmsg_dump_get_line_nolock(&dumper, true, buf,
-					 sizeof(buf) - 1, &len)) {
-		buf[len] = 0;
-		fiq_debugger_puts(state, buf);
-	}
-}
-
-static void fiq_debugger_printf(struct fiq_debugger_output *output,
-			       const char *fmt, ...)
-{
-	struct fiq_debugger_state *state;
-	char buf[256];
-	va_list ap;
-
-	state = container_of(output, struct fiq_debugger_state, output);
-	va_start(ap, fmt);
-	vsnprintf(buf, sizeof(buf), fmt, ap);
-	va_end(ap);
-
-	fiq_debugger_puts(state, buf);
-}
-
-/* Safe outside fiq context */
-static int fiq_debugger_printf_nfiq(void *cookie, const char *fmt, ...)
-{
-	struct fiq_debugger_state *state = cookie;
-	char buf[256];
-	va_list ap;
-	unsigned long irq_flags;
-
-	va_start(ap, fmt);
-	vsnprintf(buf, 128, fmt, ap);
-	va_end(ap);
-
-	local_irq_save(irq_flags);
-	fiq_debugger_puts(state, buf);
-	fiq_debugger_uart_flush(state);
-	local_irq_restore(irq_flags);
-	return state->debug_abort;
-}
-
-static void fiq_debugger_dump_irqs(struct fiq_debugger_state *state)
-{
-	int n;
-	struct irq_desc *desc;
-
-	fiq_debugger_printf(&state->output,
-			"irqnr       total  since-last   status  name\n");
-	for_each_irq_desc(n, desc) {
-		struct irqaction *act = desc->action;
-		if (!act && !kstat_irqs(n))
-			continue;
-		fiq_debugger_printf(&state->output, "%5d: %10u %11u %8x  %s\n", n,
-			kstat_irqs(n),
-			kstat_irqs(n) - state->last_irqs[n],
-			desc->status_use_accessors,
-			(act && act->name) ? act->name : "???");
-		state->last_irqs[n] = kstat_irqs(n);
-	}
-}
-
-static void fiq_debugger_do_ps(struct fiq_debugger_state *state)
-{
-	struct task_struct *g;
-	struct task_struct *p;
-	unsigned task_state;
-	static const char stat_nam[] = "RSDTtZX";
-
-	fiq_debugger_printf(&state->output, "pid   ppid  prio task            pc\n");
-	read_lock(&tasklist_lock);
-	do_each_thread(g, p) {
-		task_state = p->state ? __ffs(p->state) + 1 : 0;
-		fiq_debugger_printf(&state->output,
-			     "%5d %5d %4d ", p->pid, p->parent->pid, p->prio);
-		fiq_debugger_printf(&state->output, "%-13.13s %c", p->comm,
-			     task_state >= sizeof(stat_nam) ? '?' : stat_nam[task_state]);
-		if (task_state == TASK_RUNNING)
-			fiq_debugger_printf(&state->output, " running\n");
-		else
-			fiq_debugger_printf(&state->output, " %08lx\n",
-					thread_saved_pc(p));
-	} while_each_thread(g, p);
-	read_unlock(&tasklist_lock);
-}
-
-#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
-static void fiq_debugger_begin_syslog_dump(struct fiq_debugger_state *state)
-{
-	state->syslog_dumping = true;
-}
-
-static void fiq_debugger_end_syslog_dump(struct fiq_debugger_state *state)
-{
-	state->syslog_dumping = false;
-}
-#else
-extern int do_syslog(int type, char __user *bug, int count);
-static void fiq_debugger_begin_syslog_dump(struct fiq_debugger_state *state)
-{
-	do_syslog(5 /* clear */, NULL, 0);
-}
-
-static void fiq_debugger_end_syslog_dump(struct fiq_debugger_state *state)
-{
-	fiq_debugger_dump_kernel_log(state);
-}
-#endif
-
-static void fiq_debugger_do_sysrq(struct fiq_debugger_state *state, char rq)
-{
-	if ((rq == 'g' || rq == 'G') && !fiq_kgdb_enable) {
-		fiq_debugger_printf(&state->output, "sysrq-g blocked\n");
-		return;
-	}
-	fiq_debugger_begin_syslog_dump(state);
-	handle_sysrq(rq);
-	fiq_debugger_end_syslog_dump(state);
-}
-
-#ifdef CONFIG_KGDB
-static void fiq_debugger_do_kgdb(struct fiq_debugger_state *state)
-{
-	if (!fiq_kgdb_enable) {
-		fiq_debugger_printf(&state->output, "kgdb through fiq debugger not enabled\n");
-		return;
-	}
-
-	fiq_debugger_printf(&state->output, "enabling console and triggering kgdb\n");
-	state->console_enable = true;
-	handle_sysrq('g');
-}
-#endif
-
-static void fiq_debugger_schedule_work(struct fiq_debugger_state *state,
-		char *cmd)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&state->work_lock, flags);
-	if (state->work_cmd[0] != '\0') {
-		fiq_debugger_printf(&state->output, "work command processor busy\n");
-		spin_unlock_irqrestore(&state->work_lock, flags);
-		return;
-	}
-
-	strlcpy(state->work_cmd, cmd, sizeof(state->work_cmd));
-	spin_unlock_irqrestore(&state->work_lock, flags);
-
-	schedule_work(&state->work);
-}
-
-static void fiq_debugger_work(struct work_struct *work)
-{
-	struct fiq_debugger_state *state;
-	char work_cmd[DEBUG_MAX];
-	char *cmd;
-	unsigned long flags;
-
-	state = container_of(work, struct fiq_debugger_state, work);
-
-	spin_lock_irqsave(&state->work_lock, flags);
-
-	strlcpy(work_cmd, state->work_cmd, sizeof(work_cmd));
-	state->work_cmd[0] = '\0';
-
-	spin_unlock_irqrestore(&state->work_lock, flags);
-
-	cmd = work_cmd;
-	if (!strncmp(cmd, "reboot", 6)) {
-		cmd += 6;
-		while (*cmd == ' ')
-			cmd++;
-		if (cmd != '\0')
-			kernel_restart(cmd);
-		else
-			kernel_restart(NULL);
-	} else {
-		fiq_debugger_printf(&state->output, "unknown work command '%s'\n",
-				work_cmd);
-	}
-}
-
-/* This function CANNOT be called in FIQ context */
-static void fiq_debugger_irq_exec(struct fiq_debugger_state *state, char *cmd)
-{
-	if (!strcmp(cmd, "ps"))
-		fiq_debugger_do_ps(state);
-	if (!strcmp(cmd, "sysrq"))
-		fiq_debugger_do_sysrq(state, 'h');
-	if (!strncmp(cmd, "sysrq ", 6))
-		fiq_debugger_do_sysrq(state, cmd[6]);
-#ifdef CONFIG_KGDB
-	if (!strcmp(cmd, "kgdb"))
-		fiq_debugger_do_kgdb(state);
-#endif
-	if (!strncmp(cmd, "reboot", 6))
-		fiq_debugger_schedule_work(state, cmd);
-}
-
-static void fiq_debugger_help(struct fiq_debugger_state *state)
-{
-	fiq_debugger_printf(&state->output,
-				"FIQ Debugger commands:\n"
-				" pc            PC status\n"
-				" regs          Register dump\n"
-				" allregs       Extended Register dump\n"
-				" bt            Stack trace\n"
-				" reboot [<c>]  Reboot with command <c>\n"
-				" reset [<c>]   Hard reset with command <c>\n"
-				" irqs          Interupt status\n"
-				" kmsg          Kernel log\n"
-				" version       Kernel version\n");
-	fiq_debugger_printf(&state->output,
-				" sleep         Allow sleep while in FIQ\n"
-				" nosleep       Disable sleep while in FIQ\n"
-				" console       Switch terminal to console\n"
-				" cpu           Current CPU\n"
-				" cpu <number>  Switch to CPU<number>\n");
-	fiq_debugger_printf(&state->output,
-				" ps            Process list\n"
-				" sysrq         sysrq options\n"
-				" sysrq <param> Execute sysrq with <param>\n");
-#ifdef CONFIG_KGDB
-	fiq_debugger_printf(&state->output,
-				" kgdb          Enter kernel debugger\n");
-#endif
-}
-
-static void fiq_debugger_take_affinity(void *info)
-{
-	struct fiq_debugger_state *state = info;
-	struct cpumask cpumask;
-
-	cpumask_clear(&cpumask);
-	cpumask_set_cpu(get_cpu(), &cpumask);
-
-	irq_set_affinity(state->uart_irq, &cpumask);
-}
-
-static void fiq_debugger_switch_cpu(struct fiq_debugger_state *state, int cpu)
-{
-	if (!fiq_debugger_have_fiq(state))
-		smp_call_function_single(cpu, fiq_debugger_take_affinity, state,
-				false);
-	state->current_cpu = cpu;
-}
-
-static bool fiq_debugger_fiq_exec(struct fiq_debugger_state *state,
-			const char *cmd, const struct pt_regs *regs,
-			void *svc_sp)
-{
-	bool signal_helper = false;
-
-	if (!strcmp(cmd, "help") || !strcmp(cmd, "?")) {
-		fiq_debugger_help(state);
-	} else if (!strcmp(cmd, "pc")) {
-		fiq_debugger_dump_pc(&state->output, regs);
-	} else if (!strcmp(cmd, "regs")) {
-		fiq_debugger_dump_regs(&state->output, regs);
-	} else if (!strcmp(cmd, "allregs")) {
-		fiq_debugger_dump_allregs(&state->output, regs);
-	} else if (!strcmp(cmd, "bt")) {
-		fiq_debugger_dump_stacktrace(&state->output, regs, 100, svc_sp);
-	} else if (!strncmp(cmd, "reset", 5)) {
-		cmd += 5;
-		while (*cmd == ' ')
-			cmd++;
-		if (*cmd) {
-			char tmp_cmd[32];
-			strlcpy(tmp_cmd, cmd, sizeof(tmp_cmd));
-			machine_restart(tmp_cmd);
-		} else {
-			machine_restart(NULL);
-		}
-	} else if (!strcmp(cmd, "irqs")) {
-		fiq_debugger_dump_irqs(state);
-	} else if (!strcmp(cmd, "kmsg")) {
-		fiq_debugger_dump_kernel_log(state);
-	} else if (!strcmp(cmd, "version")) {
-		fiq_debugger_printf(&state->output, "%s\n", linux_banner);
-	} else if (!strcmp(cmd, "sleep")) {
-		state->no_sleep = false;
-		fiq_debugger_printf(&state->output, "enabling sleep\n");
-	} else if (!strcmp(cmd, "nosleep")) {
-		state->no_sleep = true;
-		fiq_debugger_printf(&state->output, "disabling sleep\n");
-	} else if (!strcmp(cmd, "console")) {
-		fiq_debugger_printf(&state->output, "console mode\n");
-		fiq_debugger_uart_flush(state);
-		state->console_enable = true;
-	} else if (!strcmp(cmd, "cpu")) {
-		fiq_debugger_printf(&state->output, "cpu %d\n", state->current_cpu);
-	} else if (!strncmp(cmd, "cpu ", 4)) {
-		unsigned long cpu = 0;
-		if (kstrtoul(cmd + 4, 10, &cpu) == 0)
-			fiq_debugger_switch_cpu(state, cpu);
-		else
-			fiq_debugger_printf(&state->output, "invalid cpu\n");
-		fiq_debugger_printf(&state->output, "cpu %d\n", state->current_cpu);
-	} else {
-		if (state->debug_busy) {
-			fiq_debugger_printf(&state->output,
-				"command processor busy. trying to abort.\n");
-			state->debug_abort = -1;
-		} else {
-			strcpy(state->debug_cmd, cmd);
-			state->debug_busy = 1;
-		}
-
-		return true;
-	}
-	if (!state->console_enable)
-		fiq_debugger_prompt(state);
-
-	return signal_helper;
-}
-
-static void fiq_debugger_sleep_timer_expired(unsigned long data)
-{
-	struct fiq_debugger_state *state = (struct fiq_debugger_state *)data;
-	unsigned long flags;
-
-	spin_lock_irqsave(&state->sleep_timer_lock, flags);
-	if (state->uart_enabled && !state->no_sleep) {
-		if (state->debug_enable && !state->console_enable) {
-			state->debug_enable = false;
-			fiq_debugger_printf_nfiq(state,
-					"suspending fiq debugger\n");
-		}
-		state->ignore_next_wakeup_irq = true;
-		fiq_debugger_uart_disable(state);
-		state->uart_enabled = false;
-		fiq_debugger_enable_wakeup_irq(state);
-	}
-	__pm_relax(&state->debugger_wake_src);
-	spin_unlock_irqrestore(&state->sleep_timer_lock, flags);
-}
-
-static void fiq_debugger_handle_wakeup(struct fiq_debugger_state *state)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&state->sleep_timer_lock, flags);
-	if (state->wakeup_irq >= 0 && state->ignore_next_wakeup_irq) {
-		state->ignore_next_wakeup_irq = false;
-	} else if (!state->uart_enabled) {
-		__pm_stay_awake(&state->debugger_wake_src);
-		fiq_debugger_uart_enable(state);
-		state->uart_enabled = true;
-		fiq_debugger_disable_wakeup_irq(state);
-		mod_timer(&state->sleep_timer, jiffies + HZ / 2);
-	}
-	spin_unlock_irqrestore(&state->sleep_timer_lock, flags);
-}
-
-static irqreturn_t fiq_debugger_wakeup_irq_handler(int irq, void *dev)
-{
-	struct fiq_debugger_state *state = dev;
-
-	if (!state->no_sleep)
-		fiq_debugger_puts(state, "WAKEUP\n");
-	fiq_debugger_handle_wakeup(state);
-
-	return IRQ_HANDLED;
-}
-
-static
-void fiq_debugger_handle_console_irq_context(struct fiq_debugger_state *state)
-{
-#if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
-	if (state->tty_port.ops) {
-		int i;
-		int count = fiq_debugger_ringbuf_level(state->tty_rbuf);
-		for (i = 0; i < count; i++) {
-			int c = fiq_debugger_ringbuf_peek(state->tty_rbuf, 0);
-			tty_insert_flip_char(&state->tty_port, c, TTY_NORMAL);
-			if (!fiq_debugger_ringbuf_consume(state->tty_rbuf, 1))
-				pr_warn("fiq tty failed to consume byte\n");
-		}
-		tty_flip_buffer_push(&state->tty_port);
-	}
-#endif
-}
-
-static void fiq_debugger_handle_irq_context(struct fiq_debugger_state *state)
-{
-	if (!state->no_sleep) {
-		unsigned long flags;
-
-		spin_lock_irqsave(&state->sleep_timer_lock, flags);
-		__pm_stay_awake(&state->debugger_wake_src);
-		mod_timer(&state->sleep_timer, jiffies + HZ * 5);
-		spin_unlock_irqrestore(&state->sleep_timer_lock, flags);
-	}
-	fiq_debugger_handle_console_irq_context(state);
-	if (state->debug_busy) {
-		fiq_debugger_irq_exec(state, state->debug_cmd);
-		if (!state->console_enable)
-			fiq_debugger_prompt(state);
-		state->debug_busy = 0;
-	}
-}
-
-static int fiq_debugger_getc(struct fiq_debugger_state *state)
-{
-	return state->pdata->uart_getc(state->pdev);
-}
-
-static bool fiq_debugger_handle_uart_interrupt(struct fiq_debugger_state *state,
-			int this_cpu, const struct pt_regs *regs, void *svc_sp)
-{
-	int c;
-	static int last_c;
-	int count = 0;
-	bool signal_helper = false;
-
-	if (this_cpu != state->current_cpu) {
-		if (state->in_fiq)
-			return false;
-
-		if (atomic_inc_return(&state->unhandled_fiq_count) !=
-					MAX_UNHANDLED_FIQ_COUNT)
-			return false;
-
-		fiq_debugger_printf(&state->output,
-			"fiq_debugger: cpu %d not responding, "
-			"reverting to cpu %d\n", state->current_cpu,
-			this_cpu);
-
-		atomic_set(&state->unhandled_fiq_count, 0);
-		fiq_debugger_switch_cpu(state, this_cpu);
-		return false;
-	}
-
-	state->in_fiq = true;
-
-	while ((c = fiq_debugger_getc(state)) != FIQ_DEBUGGER_NO_CHAR) {
-		count++;
-		if (!state->debug_enable) {
-			if ((c == 13) || (c == 10)) {
-				state->debug_enable = true;
-				state->debug_count = 0;
-				fiq_debugger_prompt(state);
-			}
-		} else if (c == FIQ_DEBUGGER_BREAK) {
-			state->console_enable = false;
-			fiq_debugger_puts(state, "fiq debugger mode\n");
-			state->debug_count = 0;
-			fiq_debugger_prompt(state);
-#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
-		} else if (state->console_enable && state->tty_rbuf) {
-			fiq_debugger_ringbuf_push(state->tty_rbuf, c);
-			signal_helper = true;
-#endif
-		} else if ((c >= ' ') && (c < 127)) {
-			if (state->debug_count < (DEBUG_MAX - 1)) {
-				state->debug_buf[state->debug_count++] = c;
-				fiq_debugger_putc(state, c);
-			}
-		} else if ((c == 8) || (c == 127)) {
-			if (state->debug_count > 0) {
-				state->debug_count--;
-				fiq_debugger_putc(state, 8);
-				fiq_debugger_putc(state, ' ');
-				fiq_debugger_putc(state, 8);
-			}
-		} else if ((c == 13) || (c == 10)) {
-			if (c == '\r' || (c == '\n' && last_c != '\r')) {
-				fiq_debugger_putc(state, '\r');
-				fiq_debugger_putc(state, '\n');
-			}
-			if (state->debug_count) {
-				state->debug_buf[state->debug_count] = 0;
-				state->debug_count = 0;
-				signal_helper |=
-					fiq_debugger_fiq_exec(state,
-							state->debug_buf,
-							regs, svc_sp);
-			} else {
-				fiq_debugger_prompt(state);
-			}
-		}
-		last_c = c;
-	}
-	if (!state->console_enable)
-		fiq_debugger_uart_flush(state);
-	if (state->pdata->fiq_ack)
-		state->pdata->fiq_ack(state->pdev, state->fiq);
-
-	/* poke sleep timer if necessary */
-	if (state->debug_enable && !state->no_sleep)
-		signal_helper = true;
-
-	atomic_set(&state->unhandled_fiq_count, 0);
-	state->in_fiq = false;
-
-	return signal_helper;
-}
-
-#ifdef CONFIG_FIQ_GLUE
-static void fiq_debugger_fiq(struct fiq_glue_handler *h,
-		const struct pt_regs *regs, void *svc_sp)
-{
-	struct fiq_debugger_state *state =
-		container_of(h, struct fiq_debugger_state, handler);
-	unsigned int this_cpu = THREAD_INFO(svc_sp)->cpu;
-	bool need_irq;
-
-	need_irq = fiq_debugger_handle_uart_interrupt(state, this_cpu, regs,
-			svc_sp);
-	if (need_irq)
-		fiq_debugger_force_irq(state);
-}
-#endif
-
-/*
- * When not using FIQs, we only use this single interrupt as an entry point.
- * This just effectively takes over the UART interrupt and does all the work
- * in this context.
- */
-static irqreturn_t fiq_debugger_uart_irq(int irq, void *dev)
-{
-	struct fiq_debugger_state *state = dev;
-	bool not_done;
-
-	fiq_debugger_handle_wakeup(state);
-
-	/* handle the debugger irq in regular context */
-	not_done = fiq_debugger_handle_uart_interrupt(state, smp_processor_id(),
-					      get_irq_regs(),
-					      current_thread_info());
-	if (not_done)
-		fiq_debugger_handle_irq_context(state);
-
-	return IRQ_HANDLED;
-}
-
-/*
- * If FIQs are used, not everything can happen in fiq context.
- * FIQ handler does what it can and then signals this interrupt to finish the
- * job in irq context.
- */
-static irqreturn_t fiq_debugger_signal_irq(int irq, void *dev)
-{
-	struct fiq_debugger_state *state = dev;
-
-	if (state->pdata->force_irq_ack)
-		state->pdata->force_irq_ack(state->pdev, state->signal_irq);
-
-	fiq_debugger_handle_irq_context(state);
-
-	return IRQ_HANDLED;
-}
-
-#ifdef CONFIG_FIQ_GLUE
-static void fiq_debugger_resume(struct fiq_glue_handler *h)
-{
-	struct fiq_debugger_state *state =
-		container_of(h, struct fiq_debugger_state, handler);
-	if (state->pdata->uart_resume)
-		state->pdata->uart_resume(state->pdev);
-}
-#endif
-
-#if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
-struct tty_driver *fiq_debugger_console_device(struct console *co, int *index)
-{
-	*index = co->index;
-	return fiq_tty_driver;
-}
-
-static void fiq_debugger_console_write(struct console *co,
-				const char *s, unsigned int count)
-{
-	struct fiq_debugger_state *state;
-	unsigned long flags;
-
-	state = container_of(co, struct fiq_debugger_state, console);
-
-	if (!state->console_enable && !state->syslog_dumping)
-		return;
-
-	fiq_debugger_uart_enable(state);
-	spin_lock_irqsave(&state->console_lock, flags);
-	while (count--) {
-		if (*s == '\n')
-			fiq_debugger_putc(state, '\r');
-		fiq_debugger_putc(state, *s++);
-	}
-	fiq_debugger_uart_flush(state);
-	spin_unlock_irqrestore(&state->console_lock, flags);
-	fiq_debugger_uart_disable(state);
-}
-
-static struct console fiq_debugger_console = {
-	.name = "ttyFIQ",
-	.device = fiq_debugger_console_device,
-	.write = fiq_debugger_console_write,
-	.flags = CON_PRINTBUFFER | CON_ANYTIME | CON_ENABLED,
-};
-
-int fiq_tty_open(struct tty_struct *tty, struct file *filp)
-{
-	int line = tty->index;
-	struct fiq_debugger_state **states = tty->driver->driver_state;
-	struct fiq_debugger_state *state = states[line];
-
-	return tty_port_open(&state->tty_port, tty, filp);
-}
-
-void fiq_tty_close(struct tty_struct *tty, struct file *filp)
-{
-	tty_port_close(tty->port, tty, filp);
-}
-
-int  fiq_tty_write(struct tty_struct *tty, const unsigned char *buf, int count)
-{
-	int i;
-	int line = tty->index;
-	struct fiq_debugger_state **states = tty->driver->driver_state;
-	struct fiq_debugger_state *state = states[line];
-
-	if (!state->console_enable)
-		return count;
-
-	fiq_debugger_uart_enable(state);
-	spin_lock_irq(&state->console_lock);
-	for (i = 0; i < count; i++)
-		fiq_debugger_putc(state, *buf++);
-	spin_unlock_irq(&state->console_lock);
-	fiq_debugger_uart_disable(state);
-
-	return count;
-}
-
-int  fiq_tty_write_room(struct tty_struct *tty)
-{
-	return 16;
-}
-
-#ifdef CONFIG_CONSOLE_POLL
-static int fiq_tty_poll_init(struct tty_driver *driver, int line, char *options)
-{
-	return 0;
-}
-
-static int fiq_tty_poll_get_char(struct tty_driver *driver, int line)
-{
-	struct fiq_debugger_state **states = driver->driver_state;
-	struct fiq_debugger_state *state = states[line];
-	int c = NO_POLL_CHAR;
-
-	fiq_debugger_uart_enable(state);
-	if (fiq_debugger_have_fiq(state)) {
-		int count = fiq_debugger_ringbuf_level(state->tty_rbuf);
-		if (count > 0) {
-			c = fiq_debugger_ringbuf_peek(state->tty_rbuf, 0);
-			fiq_debugger_ringbuf_consume(state->tty_rbuf, 1);
-		}
-	} else {
-		c = fiq_debugger_getc(state);
-		if (c == FIQ_DEBUGGER_NO_CHAR)
-			c = NO_POLL_CHAR;
-	}
-	fiq_debugger_uart_disable(state);
-
-	return c;
-}
-
-static void fiq_tty_poll_put_char(struct tty_driver *driver, int line, char ch)
-{
-	struct fiq_debugger_state **states = driver->driver_state;
-	struct fiq_debugger_state *state = states[line];
-	fiq_debugger_uart_enable(state);
-	fiq_debugger_putc(state, ch);
-	fiq_debugger_uart_disable(state);
-}
-#endif
-
-static const struct tty_port_operations fiq_tty_port_ops;
-
-static const struct tty_operations fiq_tty_driver_ops = {
-	.write = fiq_tty_write,
-	.write_room = fiq_tty_write_room,
-	.open = fiq_tty_open,
-	.close = fiq_tty_close,
-#ifdef CONFIG_CONSOLE_POLL
-	.poll_init = fiq_tty_poll_init,
-	.poll_get_char = fiq_tty_poll_get_char,
-	.poll_put_char = fiq_tty_poll_put_char,
-#endif
-};
-
-static int fiq_debugger_tty_init(void)
-{
-	int ret;
-	struct fiq_debugger_state **states = NULL;
-
-	states = kzalloc(sizeof(*states) * MAX_FIQ_DEBUGGER_PORTS, GFP_KERNEL);
-	if (!states) {
-		pr_err("Failed to allocate fiq debugger state structres\n");
-		return -ENOMEM;
-	}
-
-	fiq_tty_driver = alloc_tty_driver(MAX_FIQ_DEBUGGER_PORTS);
-	if (!fiq_tty_driver) {
-		pr_err("Failed to allocate fiq debugger tty\n");
-		ret = -ENOMEM;
-		goto err_free_state;
-	}
-
-	fiq_tty_driver->owner		= THIS_MODULE;
-	fiq_tty_driver->driver_name	= "fiq-debugger";
-	fiq_tty_driver->name		= "ttyFIQ";
-	fiq_tty_driver->type		= TTY_DRIVER_TYPE_SERIAL;
-	fiq_tty_driver->subtype		= SERIAL_TYPE_NORMAL;
-	fiq_tty_driver->init_termios	= tty_std_termios;
-	fiq_tty_driver->flags		= TTY_DRIVER_REAL_RAW |
-					  TTY_DRIVER_DYNAMIC_DEV;
-	fiq_tty_driver->driver_state	= states;
-
-	fiq_tty_driver->init_termios.c_cflag =
-					B115200 | CS8 | CREAD | HUPCL | CLOCAL;
-	fiq_tty_driver->init_termios.c_ispeed = 115200;
-	fiq_tty_driver->init_termios.c_ospeed = 115200;
-
-	tty_set_operations(fiq_tty_driver, &fiq_tty_driver_ops);
-
-	ret = tty_register_driver(fiq_tty_driver);
-	if (ret) {
-		pr_err("Failed to register fiq tty: %d\n", ret);
-		goto err_free_tty;
-	}
-
-	pr_info("Registered FIQ tty driver\n");
-	return 0;
-
-err_free_tty:
-	put_tty_driver(fiq_tty_driver);
-	fiq_tty_driver = NULL;
-err_free_state:
-	kfree(states);
-	return ret;
-}
-
-static int fiq_debugger_tty_init_one(struct fiq_debugger_state *state)
-{
-	int ret;
-	struct device *tty_dev;
-	struct fiq_debugger_state **states = fiq_tty_driver->driver_state;
-
-	states[state->pdev->id] = state;
-
-	state->tty_rbuf = fiq_debugger_ringbuf_alloc(1024);
-	if (!state->tty_rbuf) {
-		pr_err("Failed to allocate fiq debugger ringbuf\n");
-		ret = -ENOMEM;
-		goto err;
-	}
-
-	tty_port_init(&state->tty_port);
-	state->tty_port.ops = &fiq_tty_port_ops;
-
-	tty_dev = tty_port_register_device(&state->tty_port, fiq_tty_driver,
-					   state->pdev->id, &state->pdev->dev);
-	if (IS_ERR(tty_dev)) {
-		pr_err("Failed to register fiq debugger tty device\n");
-		ret = PTR_ERR(tty_dev);
-		goto err;
-	}
-
-	device_set_wakeup_capable(tty_dev, 1);
-
-	pr_info("Registered fiq debugger ttyFIQ%d\n", state->pdev->id);
-
-	return 0;
-
-err:
-	fiq_debugger_ringbuf_free(state->tty_rbuf);
-	state->tty_rbuf = NULL;
-	return ret;
-}
-#endif
-
-static int fiq_debugger_dev_suspend(struct device *dev)
-{
-	struct platform_device *pdev = to_platform_device(dev);
-	struct fiq_debugger_state *state = platform_get_drvdata(pdev);
-
-	if (state->pdata->uart_dev_suspend)
-		return state->pdata->uart_dev_suspend(pdev);
-	return 0;
-}
-
-static int fiq_debugger_dev_resume(struct device *dev)
-{
-	struct platform_device *pdev = to_platform_device(dev);
-	struct fiq_debugger_state *state = platform_get_drvdata(pdev);
-
-	if (state->pdata->uart_dev_resume)
-		return state->pdata->uart_dev_resume(pdev);
-	return 0;
-}
-
-static int fiq_debugger_probe(struct platform_device *pdev)
-{
-	int ret;
-	struct fiq_debugger_pdata *pdata = dev_get_platdata(&pdev->dev);
-	struct fiq_debugger_state *state;
-	int fiq;
-	int uart_irq;
-
-	if (pdev->id >= MAX_FIQ_DEBUGGER_PORTS)
-		return -EINVAL;
-
-	if (!pdata->uart_getc || !pdata->uart_putc)
-		return -EINVAL;
-	if ((pdata->uart_enable && !pdata->uart_disable) ||
-	    (!pdata->uart_enable && pdata->uart_disable))
-		return -EINVAL;
-
-	fiq = platform_get_irq_byname(pdev, "fiq");
-	uart_irq = platform_get_irq_byname(pdev, "uart_irq");
-
-	/* uart_irq mode and fiq mode are mutually exclusive, but one of them
-	 * is required */
-	if ((uart_irq < 0 && fiq < 0) || (uart_irq >= 0 && fiq >= 0))
-		return -EINVAL;
-	if (fiq >= 0 && !pdata->fiq_enable)
-		return -EINVAL;
-
-	state = kzalloc(sizeof(*state), GFP_KERNEL);
-	state->output.printf = fiq_debugger_printf;
-	setup_timer(&state->sleep_timer, fiq_debugger_sleep_timer_expired,
-		    (unsigned long)state);
-	state->pdata = pdata;
-	state->pdev = pdev;
-	state->no_sleep = initial_no_sleep;
-	state->debug_enable = initial_debug_enable;
-	state->console_enable = initial_console_enable;
-
-	state->fiq = fiq;
-	state->uart_irq = uart_irq;
-	state->signal_irq = platform_get_irq_byname(pdev, "signal");
-	state->wakeup_irq = platform_get_irq_byname(pdev, "wakeup");
-
-	INIT_WORK(&state->work, fiq_debugger_work);
-	spin_lock_init(&state->work_lock);
-
-	platform_set_drvdata(pdev, state);
-
-	spin_lock_init(&state->sleep_timer_lock);
-
-	if (state->wakeup_irq < 0 && fiq_debugger_have_fiq(state))
-		state->no_sleep = true;
-	state->ignore_next_wakeup_irq = !state->no_sleep;
-
-	wakeup_source_init(&state->debugger_wake_src, "serial-debug");
-
-	state->clk = clk_get(&pdev->dev, NULL);
-	if (IS_ERR(state->clk))
-		state->clk = NULL;
-
-	/* do not call pdata->uart_enable here since uart_init may still
-	 * need to do some initialization before uart_enable can work.
-	 * So, only try to manage the clock during init.
-	 */
-	if (state->clk)
-		clk_enable(state->clk);
-
-	if (pdata->uart_init) {
-		ret = pdata->uart_init(pdev);
-		if (ret)
-			goto err_uart_init;
-	}
-
-	fiq_debugger_printf_nfiq(state,
-				"<hit enter %sto activate fiq debugger>\n",
-				state->no_sleep ? "" : "twice ");
-
-#ifdef CONFIG_FIQ_GLUE
-	if (fiq_debugger_have_fiq(state)) {
-		state->handler.fiq = fiq_debugger_fiq;
-		state->handler.resume = fiq_debugger_resume;
-		ret = fiq_glue_register_handler(&state->handler);
-		if (ret) {
-			pr_err("%s: could not install fiq handler\n", __func__);
-			goto err_register_irq;
-		}
-
-		pdata->fiq_enable(pdev, state->fiq, 1);
-	} else
-#endif
-	{
-		ret = request_irq(state->uart_irq, fiq_debugger_uart_irq,
-				  IRQF_NO_SUSPEND, "debug", state);
-		if (ret) {
-			pr_err("%s: could not install irq handler\n", __func__);
-			goto err_register_irq;
-		}
-
-		/* for irq-only mode, we want this irq to wake us up, if it
-		 * can.
-		 */
-		enable_irq_wake(state->uart_irq);
-	}
-
-	if (state->clk)
-		clk_disable(state->clk);
-
-	if (state->signal_irq >= 0) {
-		ret = request_irq(state->signal_irq, fiq_debugger_signal_irq,
-			  IRQF_TRIGGER_RISING, "debug-signal", state);
-		if (ret)
-			pr_err("serial_debugger: could not install signal_irq");
-	}
-
-	if (state->wakeup_irq >= 0) {
-		ret = request_irq(state->wakeup_irq,
-				  fiq_debugger_wakeup_irq_handler,
-				  IRQF_TRIGGER_FALLING,
-				  "debug-wakeup", state);
-		if (ret) {
-			pr_err("serial_debugger: "
-				"could not install wakeup irq\n");
-			state->wakeup_irq = -1;
-		} else {
-			ret = enable_irq_wake(state->wakeup_irq);
-			if (ret) {
-				pr_err("serial_debugger: "
-					"could not enable wakeup\n");
-				state->wakeup_irq_no_set_wake = true;
-			}
-		}
-	}
-	if (state->no_sleep)
-		fiq_debugger_handle_wakeup(state);
-
-#if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
-	spin_lock_init(&state->console_lock);
-	state->console = fiq_debugger_console;
-	state->console.index = pdev->id;
-	if (!console_set_on_cmdline)
-		add_preferred_console(state->console.name,
-			state->console.index, NULL);
-	register_console(&state->console);
-	fiq_debugger_tty_init_one(state);
-#endif
-	return 0;
-
-err_register_irq:
-	if (pdata->uart_free)
-		pdata->uart_free(pdev);
-err_uart_init:
-	if (state->clk)
-		clk_disable(state->clk);
-	if (state->clk)
-		clk_put(state->clk);
-	wakeup_source_trash(&state->debugger_wake_src);
-	platform_set_drvdata(pdev, NULL);
-	kfree(state);
-	return ret;
-}
-
-static const struct dev_pm_ops fiq_debugger_dev_pm_ops = {
-	.suspend	= fiq_debugger_dev_suspend,
-	.resume		= fiq_debugger_dev_resume,
-};
-
-static struct platform_driver fiq_debugger_driver = {
-	.probe	= fiq_debugger_probe,
-	.driver	= {
-		.name	= "fiq_debugger",
-		.pm	= &fiq_debugger_dev_pm_ops,
-	},
-};
-
-#if defined(CONFIG_FIQ_DEBUGGER_UART_OVERLAY)
-int fiq_debugger_uart_overlay(void)
-{
-	struct device_node *onp = of_find_node_by_path("/uart_overlay@0");
-	int ret;
-
-	if (!onp) {
-		pr_err("serial_debugger: uart overlay not found\n");
-		return -ENODEV;
-	}
-
-	ret = of_overlay_create(onp);
-	if (ret < 0) {
-		pr_err("serial_debugger: fail to create overlay: %d\n", ret);
-		of_node_put(onp);
-		return ret;
-	}
-
-	pr_info("serial_debugger: uart overlay applied\n");
-	return 0;
-}
-#endif
-
-static int __init fiq_debugger_init(void)
-{
-	if (fiq_debugger_disable) {
-		pr_err("serial_debugger: disabled\n");
-		return -ENODEV;
-	}
-#if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
-	fiq_debugger_tty_init();
-#endif
-#if defined(CONFIG_FIQ_DEBUGGER_UART_OVERLAY)
-	fiq_debugger_uart_overlay();
-#endif
-	return platform_driver_register(&fiq_debugger_driver);
-}
-
-postcore_initcall(fiq_debugger_init);
diff --git a/drivers/staging/android/fiq_debugger/fiq_debugger.h b/drivers/staging/android/fiq_debugger/fiq_debugger.h
deleted file mode 100644
index c9ec4f8..0000000
--- a/drivers/staging/android/fiq_debugger/fiq_debugger.h
+++ /dev/null
@@ -1,64 +0,0 @@
-/*
- * drivers/staging/android/fiq_debugger/fiq_debugger.h
- *
- * Copyright (C) 2010 Google, Inc.
- * Author: Colin Cross <ccross@android.com>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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.
- *
- */
-
-#ifndef _ARCH_ARM_MACH_TEGRA_FIQ_DEBUGGER_H_
-#define _ARCH_ARM_MACH_TEGRA_FIQ_DEBUGGER_H_
-
-#include <linux/serial_core.h>
-
-#define FIQ_DEBUGGER_NO_CHAR NO_POLL_CHAR
-#define FIQ_DEBUGGER_BREAK 0x00ff0100
-
-#define FIQ_DEBUGGER_FIQ_IRQ_NAME	"fiq"
-#define FIQ_DEBUGGER_SIGNAL_IRQ_NAME	"signal"
-#define FIQ_DEBUGGER_WAKEUP_IRQ_NAME	"wakeup"
-
-/**
- * struct fiq_debugger_pdata - fiq debugger platform data
- * @uart_resume:	used to restore uart state right before enabling
- *			the fiq.
- * @uart_enable:	Do the work necessary to communicate with the uart
- *			hw (enable clocks, etc.). This must be ref-counted.
- * @uart_disable:	Do the work necessary to disable the uart hw
- *			(disable clocks, etc.). This must be ref-counted.
- * @uart_dev_suspend:	called during PM suspend, generally not needed
- *			for real fiq mode debugger.
- * @uart_dev_resume:	called during PM resume, generally not needed
- *			for real fiq mode debugger.
- */
-struct fiq_debugger_pdata {
-	int (*uart_init)(struct platform_device *pdev);
-	void (*uart_free)(struct platform_device *pdev);
-	int (*uart_resume)(struct platform_device *pdev);
-	int (*uart_getc)(struct platform_device *pdev);
-	void (*uart_putc)(struct platform_device *pdev, unsigned int c);
-	void (*uart_flush)(struct platform_device *pdev);
-	void (*uart_enable)(struct platform_device *pdev);
-	void (*uart_disable)(struct platform_device *pdev);
-
-	int (*uart_dev_suspend)(struct platform_device *pdev);
-	int (*uart_dev_resume)(struct platform_device *pdev);
-
-	void (*fiq_enable)(struct platform_device *pdev, unsigned int fiq,
-								bool enable);
-	void (*fiq_ack)(struct platform_device *pdev, unsigned int fiq);
-
-	void (*force_irq)(struct platform_device *pdev, unsigned int irq);
-	void (*force_irq_ack)(struct platform_device *pdev, unsigned int irq);
-};
-
-#endif
diff --git a/drivers/staging/android/fiq_debugger/fiq_debugger_arm.c b/drivers/staging/android/fiq_debugger/fiq_debugger_arm.c
deleted file mode 100644
index 8b3e013..0000000
--- a/drivers/staging/android/fiq_debugger/fiq_debugger_arm.c
+++ /dev/null
@@ -1,240 +0,0 @@
-/*
- * Copyright (C) 2014 Google, Inc.
- * Author: Colin Cross <ccross@android.com>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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.
- *
- */
-
-#include <linux/ptrace.h>
-#include <linux/uaccess.h>
-
-#include <asm/stacktrace.h>
-
-#include "fiq_debugger_priv.h"
-
-static char *mode_name(unsigned cpsr)
-{
-	switch (cpsr & MODE_MASK) {
-	case USR_MODE: return "USR";
-	case FIQ_MODE: return "FIQ";
-	case IRQ_MODE: return "IRQ";
-	case SVC_MODE: return "SVC";
-	case ABT_MODE: return "ABT";
-	case UND_MODE: return "UND";
-	case SYSTEM_MODE: return "SYS";
-	default: return "???";
-	}
-}
-
-void fiq_debugger_dump_pc(struct fiq_debugger_output *output,
-		const struct pt_regs *regs)
-{
-	output->printf(output, " pc %08x cpsr %08x mode %s\n",
-		regs->ARM_pc, regs->ARM_cpsr, mode_name(regs->ARM_cpsr));
-}
-
-void fiq_debugger_dump_regs(struct fiq_debugger_output *output,
-		const struct pt_regs *regs)
-{
-	output->printf(output,
-			" r0 %08x  r1 %08x  r2 %08x  r3 %08x\n",
-			regs->ARM_r0, regs->ARM_r1, regs->ARM_r2, regs->ARM_r3);
-	output->printf(output,
-			" r4 %08x  r5 %08x  r6 %08x  r7 %08x\n",
-			regs->ARM_r4, regs->ARM_r5, regs->ARM_r6, regs->ARM_r7);
-	output->printf(output,
-			" r8 %08x  r9 %08x r10 %08x r11 %08x  mode %s\n",
-			regs->ARM_r8, regs->ARM_r9, regs->ARM_r10, regs->ARM_fp,
-			mode_name(regs->ARM_cpsr));
-	output->printf(output,
-			" ip %08x  sp %08x  lr %08x  pc %08x cpsr %08x\n",
-			regs->ARM_ip, regs->ARM_sp, regs->ARM_lr, regs->ARM_pc,
-			regs->ARM_cpsr);
-}
-
-struct mode_regs {
-	unsigned long sp_svc;
-	unsigned long lr_svc;
-	unsigned long spsr_svc;
-
-	unsigned long sp_abt;
-	unsigned long lr_abt;
-	unsigned long spsr_abt;
-
-	unsigned long sp_und;
-	unsigned long lr_und;
-	unsigned long spsr_und;
-
-	unsigned long sp_irq;
-	unsigned long lr_irq;
-	unsigned long spsr_irq;
-
-	unsigned long r8_fiq;
-	unsigned long r9_fiq;
-	unsigned long r10_fiq;
-	unsigned long r11_fiq;
-	unsigned long r12_fiq;
-	unsigned long sp_fiq;
-	unsigned long lr_fiq;
-	unsigned long spsr_fiq;
-};
-
-static void __naked get_mode_regs(struct mode_regs *regs)
-{
-	asm volatile (
-	"mrs	r1, cpsr\n"
-	"msr	cpsr_c, #0xd3 @(SVC_MODE | PSR_I_BIT | PSR_F_BIT)\n"
-	"stmia	r0!, {r13 - r14}\n"
-	"mrs	r2, spsr\n"
-	"msr	cpsr_c, #0xd7 @(ABT_MODE | PSR_I_BIT | PSR_F_BIT)\n"
-	"stmia	r0!, {r2, r13 - r14}\n"
-	"mrs	r2, spsr\n"
-	"msr	cpsr_c, #0xdb @(UND_MODE | PSR_I_BIT | PSR_F_BIT)\n"
-	"stmia	r0!, {r2, r13 - r14}\n"
-	"mrs	r2, spsr\n"
-	"msr	cpsr_c, #0xd2 @(IRQ_MODE | PSR_I_BIT | PSR_F_BIT)\n"
-	"stmia	r0!, {r2, r13 - r14}\n"
-	"mrs	r2, spsr\n"
-	"msr	cpsr_c, #0xd1 @(FIQ_MODE | PSR_I_BIT | PSR_F_BIT)\n"
-	"stmia	r0!, {r2, r8 - r14}\n"
-	"mrs	r2, spsr\n"
-	"stmia	r0!, {r2}\n"
-	"msr	cpsr_c, r1\n"
-	"bx	lr\n");
-}
-
-
-void fiq_debugger_dump_allregs(struct fiq_debugger_output *output,
-		const struct pt_regs *regs)
-{
-	struct mode_regs mode_regs;
-	unsigned long mode = regs->ARM_cpsr & MODE_MASK;
-
-	fiq_debugger_dump_regs(output, regs);
-	get_mode_regs(&mode_regs);
-
-	output->printf(output,
-			"%csvc: sp %08x  lr %08x  spsr %08x\n",
-			mode == SVC_MODE ? '*' : ' ',
-			mode_regs.sp_svc, mode_regs.lr_svc, mode_regs.spsr_svc);
-	output->printf(output,
-			"%cabt: sp %08x  lr %08x  spsr %08x\n",
-			mode == ABT_MODE ? '*' : ' ',
-			mode_regs.sp_abt, mode_regs.lr_abt, mode_regs.spsr_abt);
-	output->printf(output,
-			"%cund: sp %08x  lr %08x  spsr %08x\n",
-			mode == UND_MODE ? '*' : ' ',
-			mode_regs.sp_und, mode_regs.lr_und, mode_regs.spsr_und);
-	output->printf(output,
-			"%cirq: sp %08x  lr %08x  spsr %08x\n",
-			mode == IRQ_MODE ? '*' : ' ',
-			mode_regs.sp_irq, mode_regs.lr_irq, mode_regs.spsr_irq);
-	output->printf(output,
-			"%cfiq: r8 %08x  r9 %08x  r10 %08x  r11 %08x  r12 %08x\n",
-			mode == FIQ_MODE ? '*' : ' ',
-			mode_regs.r8_fiq, mode_regs.r9_fiq, mode_regs.r10_fiq,
-			mode_regs.r11_fiq, mode_regs.r12_fiq);
-	output->printf(output,
-			" fiq: sp %08x  lr %08x  spsr %08x\n",
-			mode_regs.sp_fiq, mode_regs.lr_fiq, mode_regs.spsr_fiq);
-}
-
-struct stacktrace_state {
-	struct fiq_debugger_output *output;
-	unsigned int depth;
-};
-
-static int report_trace(struct stackframe *frame, void *d)
-{
-	struct stacktrace_state *sts = d;
-
-	if (sts->depth) {
-		sts->output->printf(sts->output,
-			"  pc: %p (%pF), lr %p (%pF), sp %p, fp %p\n",
-			frame->pc, frame->pc, frame->lr, frame->lr,
-			frame->sp, frame->fp);
-		sts->depth--;
-		return 0;
-	}
-	sts->output->printf(sts->output, "  ...\n");
-
-	return sts->depth == 0;
-}
-
-struct frame_tail {
-	struct frame_tail *fp;
-	unsigned long sp;
-	unsigned long lr;
-} __attribute__((packed));
-
-static struct frame_tail *user_backtrace(struct fiq_debugger_output *output,
-					struct frame_tail *tail)
-{
-	struct frame_tail buftail[2];
-
-	/* Also check accessibility of one struct frame_tail beyond */
-	if (!access_ok(VERIFY_READ, tail, sizeof(buftail))) {
-		output->printf(output, "  invalid frame pointer %p\n",
-				tail);
-		return NULL;
-	}
-	if (__copy_from_user_inatomic(buftail, tail, sizeof(buftail))) {
-		output->printf(output,
-			"  failed to copy frame pointer %p\n", tail);
-		return NULL;
-	}
-
-	output->printf(output, "  %p\n", buftail[0].lr);
-
-	/* frame pointers should strictly progress back up the stack
-	 * (towards higher addresses) */
-	if (tail >= buftail[0].fp)
-		return NULL;
-
-	return buftail[0].fp-1;
-}
-
-void fiq_debugger_dump_stacktrace(struct fiq_debugger_output *output,
-		const struct pt_regs *regs, unsigned int depth, void *ssp)
-{
-	struct frame_tail *tail;
-	struct thread_info *real_thread_info = THREAD_INFO(ssp);
-	struct stacktrace_state sts;
-
-	sts.depth = depth;
-	sts.output = output;
-	*current_thread_info() = *real_thread_info;
-
-	if (!current)
-		output->printf(output, "current NULL\n");
-	else
-		output->printf(output, "pid: %d  comm: %s\n",
-			current->pid, current->comm);
-	fiq_debugger_dump_regs(output, regs);
-
-	if (!user_mode(regs)) {
-		struct stackframe frame;
-		frame.fp = regs->ARM_fp;
-		frame.sp = regs->ARM_sp;
-		frame.lr = regs->ARM_lr;
-		frame.pc = regs->ARM_pc;
-		output->printf(output,
-			"  pc: %p (%pF), lr %p (%pF), sp %p, fp %p\n",
-			regs->ARM_pc, regs->ARM_pc, regs->ARM_lr, regs->ARM_lr,
-			regs->ARM_sp, regs->ARM_fp);
-		walk_stackframe(&frame, report_trace, &sts);
-		return;
-	}
-
-	tail = ((struct frame_tail *) regs->ARM_fp) - 1;
-	while (depth-- && tail && !((unsigned long) tail & 3))
-		tail = user_backtrace(output, tail);
-}
diff --git a/drivers/staging/android/fiq_debugger/fiq_debugger_arm64.c b/drivers/staging/android/fiq_debugger/fiq_debugger_arm64.c
deleted file mode 100644
index 97246bc..0000000
--- a/drivers/staging/android/fiq_debugger/fiq_debugger_arm64.c
+++ /dev/null
@@ -1,202 +0,0 @@
-/*
- * Copyright (C) 2014 Google, Inc.
- * Author: Colin Cross <ccross@android.com>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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.
- *
- */
-
-#include <linux/ptrace.h>
-#include <asm/stacktrace.h>
-
-#include "fiq_debugger_priv.h"
-
-static char *mode_name(const struct pt_regs *regs)
-{
-	if (compat_user_mode(regs)) {
-		return "USR";
-	} else {
-		switch (processor_mode(regs)) {
-		case PSR_MODE_EL0t: return "EL0t";
-		case PSR_MODE_EL1t: return "EL1t";
-		case PSR_MODE_EL1h: return "EL1h";
-		case PSR_MODE_EL2t: return "EL2t";
-		case PSR_MODE_EL2h: return "EL2h";
-		default: return "???";
-		}
-	}
-}
-
-void fiq_debugger_dump_pc(struct fiq_debugger_output *output,
-		const struct pt_regs *regs)
-{
-	output->printf(output, " pc %016lx cpsr %08lx mode %s\n",
-		regs->pc, regs->pstate, mode_name(regs));
-}
-
-void fiq_debugger_dump_regs_aarch32(struct fiq_debugger_output *output,
-		const struct pt_regs *regs)
-{
-	output->printf(output, " r0 %08x  r1 %08x  r2 %08x  r3 %08x\n",
-			regs->compat_usr(0), regs->compat_usr(1),
-			regs->compat_usr(2), regs->compat_usr(3));
-	output->printf(output, " r4 %08x  r5 %08x  r6 %08x  r7 %08x\n",
-			regs->compat_usr(4), regs->compat_usr(5),
-			regs->compat_usr(6), regs->compat_usr(7));
-	output->printf(output, " r8 %08x  r9 %08x r10 %08x r11 %08x\n",
-			regs->compat_usr(8), regs->compat_usr(9),
-			regs->compat_usr(10), regs->compat_usr(11));
-	output->printf(output, " ip %08x  sp %08x  lr %08x  pc %08x\n",
-			regs->compat_usr(12), regs->compat_sp,
-			regs->compat_lr, regs->pc);
-	output->printf(output, " cpsr %08x (%s)\n",
-			regs->pstate, mode_name(regs));
-}
-
-void fiq_debugger_dump_regs_aarch64(struct fiq_debugger_output *output,
-		const struct pt_regs *regs)
-{
-
-	output->printf(output, "  x0 %016lx   x1 %016lx\n",
-			regs->regs[0], regs->regs[1]);
-	output->printf(output, "  x2 %016lx   x3 %016lx\n",
-			regs->regs[2], regs->regs[3]);
-	output->printf(output, "  x4 %016lx   x5 %016lx\n",
-			regs->regs[4], regs->regs[5]);
-	output->printf(output, "  x6 %016lx   x7 %016lx\n",
-			regs->regs[6], regs->regs[7]);
-	output->printf(output, "  x8 %016lx   x9 %016lx\n",
-			regs->regs[8], regs->regs[9]);
-	output->printf(output, " x10 %016lx  x11 %016lx\n",
-			regs->regs[10], regs->regs[11]);
-	output->printf(output, " x12 %016lx  x13 %016lx\n",
-			regs->regs[12], regs->regs[13]);
-	output->printf(output, " x14 %016lx  x15 %016lx\n",
-			regs->regs[14], regs->regs[15]);
-	output->printf(output, " x16 %016lx  x17 %016lx\n",
-			regs->regs[16], regs->regs[17]);
-	output->printf(output, " x18 %016lx  x19 %016lx\n",
-			regs->regs[18], regs->regs[19]);
-	output->printf(output, " x20 %016lx  x21 %016lx\n",
-			regs->regs[20], regs->regs[21]);
-	output->printf(output, " x22 %016lx  x23 %016lx\n",
-			regs->regs[22], regs->regs[23]);
-	output->printf(output, " x24 %016lx  x25 %016lx\n",
-			regs->regs[24], regs->regs[25]);
-	output->printf(output, " x26 %016lx  x27 %016lx\n",
-			regs->regs[26], regs->regs[27]);
-	output->printf(output, " x28 %016lx  x29 %016lx\n",
-			regs->regs[28], regs->regs[29]);
-	output->printf(output, " x30 %016lx   sp %016lx\n",
-			regs->regs[30], regs->sp);
-	output->printf(output, "  pc %016lx cpsr %08x (%s)\n",
-			regs->pc, regs->pstate, mode_name(regs));
-}
-
-void fiq_debugger_dump_regs(struct fiq_debugger_output *output,
-		const struct pt_regs *regs)
-{
-	if (compat_user_mode(regs))
-		fiq_debugger_dump_regs_aarch32(output, regs);
-	else
-		fiq_debugger_dump_regs_aarch64(output, regs);
-}
-
-#define READ_SPECIAL_REG(x) ({ \
-	u64 val; \
-	asm volatile ("mrs %0, " # x : "=r"(val)); \
-	val; \
-})
-
-void fiq_debugger_dump_allregs(struct fiq_debugger_output *output,
-		const struct pt_regs *regs)
-{
-	u32 pstate = READ_SPECIAL_REG(CurrentEl);
-	bool in_el2 = (pstate & PSR_MODE_MASK) >= PSR_MODE_EL2t;
-
-	fiq_debugger_dump_regs(output, regs);
-
-	output->printf(output, " sp_el0   %016lx\n",
-			READ_SPECIAL_REG(sp_el0));
-
-	if (in_el2)
-		output->printf(output, " sp_el1   %016lx\n",
-				READ_SPECIAL_REG(sp_el1));
-
-	output->printf(output, " elr_el1  %016lx\n",
-			READ_SPECIAL_REG(elr_el1));
-
-	output->printf(output, " spsr_el1 %08lx\n",
-			READ_SPECIAL_REG(spsr_el1));
-
-	if (in_el2) {
-		output->printf(output, " spsr_irq %08lx\n",
-				READ_SPECIAL_REG(spsr_irq));
-		output->printf(output, " spsr_abt %08lx\n",
-				READ_SPECIAL_REG(spsr_abt));
-		output->printf(output, " spsr_und %08lx\n",
-				READ_SPECIAL_REG(spsr_und));
-		output->printf(output, " spsr_fiq %08lx\n",
-				READ_SPECIAL_REG(spsr_fiq));
-		output->printf(output, " spsr_el2 %08lx\n",
-				READ_SPECIAL_REG(elr_el2));
-		output->printf(output, " spsr_el2 %08lx\n",
-				READ_SPECIAL_REG(spsr_el2));
-	}
-}
-
-struct stacktrace_state {
-	struct fiq_debugger_output *output;
-	unsigned int depth;
-};
-
-static int report_trace(struct stackframe *frame, void *d)
-{
-	struct stacktrace_state *sts = d;
-
-	if (sts->depth) {
-		sts->output->printf(sts->output, "%pF:\n", frame->pc);
-		sts->output->printf(sts->output,
-				"  pc %016lx   sp %016lx   fp %016lx\n",
-				frame->pc, frame->sp, frame->fp);
-		sts->depth--;
-		return 0;
-	}
-	sts->output->printf(sts->output, "  ...\n");
-
-	return sts->depth == 0;
-}
-
-void fiq_debugger_dump_stacktrace(struct fiq_debugger_output *output,
-		const struct pt_regs *regs, unsigned int depth, void *ssp)
-{
-	struct thread_info *real_thread_info = THREAD_INFO(ssp);
-	struct stacktrace_state sts;
-
-	sts.depth = depth;
-	sts.output = output;
-	*current_thread_info() = *real_thread_info;
-
-	if (!current)
-		output->printf(output, "current NULL\n");
-	else
-		output->printf(output, "pid: %d  comm: %s\n",
-			current->pid, current->comm);
-	fiq_debugger_dump_regs(output, regs);
-
-	if (!user_mode(regs)) {
-		struct stackframe frame;
-		frame.fp = regs->regs[29];
-		frame.sp = regs->sp;
-		frame.pc = regs->pc;
-		output->printf(output, "\n");
-		walk_stackframe(current, &frame, report_trace, &sts);
-	}
-}
diff --git a/drivers/staging/android/fiq_debugger/fiq_debugger_priv.h b/drivers/staging/android/fiq_debugger/fiq_debugger_priv.h
deleted file mode 100644
index d5d051f..0000000
--- a/drivers/staging/android/fiq_debugger/fiq_debugger_priv.h
+++ /dev/null
@@ -1,37 +0,0 @@
-/*
- * Copyright (C) 2014 Google, Inc.
- * Author: Colin Cross <ccross@android.com>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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.
- *
- */
-
-#ifndef _FIQ_DEBUGGER_PRIV_H_
-#define _FIQ_DEBUGGER_PRIV_H_
-
-#define THREAD_INFO(sp) ((struct thread_info *) \
-		((unsigned long)(sp) & ~(THREAD_SIZE - 1)))
-
-struct fiq_debugger_output {
-	void (*printf)(struct fiq_debugger_output *output, const char *fmt, ...);
-};
-
-struct pt_regs;
-
-void fiq_debugger_dump_pc(struct fiq_debugger_output *output,
-		const struct pt_regs *regs);
-void fiq_debugger_dump_regs(struct fiq_debugger_output *output,
-		const struct pt_regs *regs);
-void fiq_debugger_dump_allregs(struct fiq_debugger_output *output,
-		const struct pt_regs *regs);
-void fiq_debugger_dump_stacktrace(struct fiq_debugger_output *output,
-		const struct pt_regs *regs, unsigned int depth, void *ssp);
-
-#endif
diff --git a/drivers/staging/android/fiq_debugger/fiq_debugger_ringbuf.h b/drivers/staging/android/fiq_debugger/fiq_debugger_ringbuf.h
deleted file mode 100644
index 10c3c5d..0000000
--- a/drivers/staging/android/fiq_debugger/fiq_debugger_ringbuf.h
+++ /dev/null
@@ -1,94 +0,0 @@
-/*
- * drivers/staging/android/fiq_debugger/fiq_debugger_ringbuf.h
- *
- * simple lockless ringbuffer
- *
- * Copyright (C) 2010 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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.
- */
-
-#include <linux/kernel.h>
-#include <linux/slab.h>
-
-struct fiq_debugger_ringbuf {
-	int len;
-	int head;
-	int tail;
-	u8 buf[];
-};
-
-
-static inline struct fiq_debugger_ringbuf *fiq_debugger_ringbuf_alloc(int len)
-{
-	struct fiq_debugger_ringbuf *rbuf;
-
-	rbuf = kzalloc(sizeof(*rbuf) + len, GFP_KERNEL);
-	if (rbuf == NULL)
-		return NULL;
-
-	rbuf->len = len;
-	rbuf->head = 0;
-	rbuf->tail = 0;
-	smp_mb();
-
-	return rbuf;
-}
-
-static inline void fiq_debugger_ringbuf_free(struct fiq_debugger_ringbuf *rbuf)
-{
-	kfree(rbuf);
-}
-
-static inline int fiq_debugger_ringbuf_level(struct fiq_debugger_ringbuf *rbuf)
-{
-	int level = rbuf->head - rbuf->tail;
-
-	if (level < 0)
-		level = rbuf->len + level;
-
-	return level;
-}
-
-static inline int fiq_debugger_ringbuf_room(struct fiq_debugger_ringbuf *rbuf)
-{
-	return rbuf->len - fiq_debugger_ringbuf_level(rbuf) - 1;
-}
-
-static inline u8
-fiq_debugger_ringbuf_peek(struct fiq_debugger_ringbuf *rbuf, int i)
-{
-	return rbuf->buf[(rbuf->tail + i) % rbuf->len];
-}
-
-static inline int
-fiq_debugger_ringbuf_consume(struct fiq_debugger_ringbuf *rbuf, int count)
-{
-	count = min(count, fiq_debugger_ringbuf_level(rbuf));
-
-	rbuf->tail = (rbuf->tail + count) % rbuf->len;
-	smp_mb();
-
-	return count;
-}
-
-static inline int
-fiq_debugger_ringbuf_push(struct fiq_debugger_ringbuf *rbuf, u8 datum)
-{
-	if (fiq_debugger_ringbuf_room(rbuf) == 0)
-		return 0;
-
-	rbuf->buf[rbuf->head] = datum;
-	smp_mb();
-	rbuf->head = (rbuf->head + 1) % rbuf->len;
-	smp_mb();
-
-	return 1;
-}
diff --git a/drivers/staging/android/fiq_debugger/fiq_watchdog.c b/drivers/staging/android/fiq_debugger/fiq_watchdog.c
deleted file mode 100644
index 194b541..0000000
--- a/drivers/staging/android/fiq_debugger/fiq_watchdog.c
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
- * Copyright (C) 2014 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/spinlock.h>
-#include <linux/pstore_ram.h>
-
-#include "fiq_watchdog.h"
-#include "fiq_debugger_priv.h"
-
-static DEFINE_RAW_SPINLOCK(fiq_watchdog_lock);
-
-static void fiq_watchdog_printf(struct fiq_debugger_output *output,
-				const char *fmt, ...)
-{
-	char buf[256];
-	va_list ap;
-	int len;
-
-	va_start(ap, fmt);
-	len = vscnprintf(buf, sizeof(buf), fmt, ap);
-	va_end(ap);
-
-	ramoops_console_write_buf(buf, len);
-}
-
-struct fiq_debugger_output fiq_watchdog_output = {
-	.printf = fiq_watchdog_printf,
-};
-
-void fiq_watchdog_triggered(const struct pt_regs *regs, void *svc_sp)
-{
-	char msg[24];
-	int len;
-
-	raw_spin_lock(&fiq_watchdog_lock);
-
-	len = scnprintf(msg, sizeof(msg), "watchdog fiq cpu %d\n",
-			THREAD_INFO(svc_sp)->cpu);
-	ramoops_console_write_buf(msg, len);
-
-	fiq_debugger_dump_stacktrace(&fiq_watchdog_output, regs, 100, svc_sp);
-
-	raw_spin_unlock(&fiq_watchdog_lock);
-}
diff --git a/drivers/staging/android/fiq_debugger/fiq_watchdog.h b/drivers/staging/android/fiq_debugger/fiq_watchdog.h
deleted file mode 100644
index c6b507f..0000000
--- a/drivers/staging/android/fiq_debugger/fiq_watchdog.h
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- * Copyright (C) 2014 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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.
- *
- */
-
-#ifndef _FIQ_WATCHDOG_H_
-#define _FIQ_WATCHDOG_H_
-
-void fiq_watchdog_triggered(const struct pt_regs *regs, void *svc_sp);
-
-#endif