sh: remove old TMU driver

This patch removes the old TMU driver (CONFIG_SH_TMU/timer-tmu.c)

As replacement, select the sh_tmu driver with CONFIG_SH_TIMER_TMU
and configure timer channel using platform data.

If multiple TMU channels are enabled using platform data, use the
earlytimer parameter on the kernel command line to select channel.
For instance, use "earlytimer=sh_tmu.0" to select the first channel.

To verify which timer is being used, look at printouts or the timer
irq count in /proc/interrupts.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

3 files changed, 0 insertions, 302 deletions

diff --git a/arch/sh/kernel/timers/Makefile b/arch/sh/kernel/timers/Makefile
index 8bceba5..fefd7ed 100644
--- a/arch/sh/kernel/timers/Makefile
+++ b/arch/sh/kernel/timers/Makefile
@@ -3,5 +3,3 @@
 #
 
 obj-y	:= timer.o
-
-obj-$(CONFIG_SH_TMU)		+= timer-tmu.o
diff --git a/arch/sh/kernel/timers/timer-tmu.c b/arch/sh/kernel/timers/timer-tmu.c
deleted file mode 100644
index fe8d893..0000000
--- a/arch/sh/kernel/timers/timer-tmu.c
+++ /dev/null
@@ -1,297 +0,0 @@
-/*
- * arch/sh/kernel/timers/timer-tmu.c - TMU Timer Support
- *
- *  Copyright (C) 2005 - 2007  Paul Mundt
- *
- * TMU handling code hacked out of arch/sh/kernel/time.c
- *
- *  Copyright (C) 1999  Tetsuya Okada & Niibe Yutaka
- *  Copyright (C) 2000  Philipp Rumpf <prumpf@tux.org>
- *  Copyright (C) 2002, 2003, 2004  Paul Mundt
- *  Copyright (C) 2002  M. R. Brown  <mrbrown@linux-sh.org>
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/interrupt.h>
-#include <linux/seqlock.h>
-#include <linux/clockchips.h>
-#include <asm/timer.h>
-#include <asm/rtc.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/clock.h>
-
-#define TMU_TOCR_INIT	0x00
-#define TMU_TCR_INIT	0x0020
-
-#define TMU0		(0)
-#define TMU1		(1)
-
-static inline void _tmu_start(int tmu_num)
-{
-	ctrl_outb(ctrl_inb(TMU_012_TSTR) | (0x1<<tmu_num), TMU_012_TSTR);
-}
-
-static inline void _tmu_set_irq(int tmu_num, int enabled)
-{
-	register unsigned long tmu_tcr = TMU0_TCR + (0xc*tmu_num);
-	ctrl_outw( (enabled ? ctrl_inw(tmu_tcr) | (1<<5) : ctrl_inw(tmu_tcr) & ~(1<<5)), tmu_tcr);
-}
-
-static inline void _tmu_stop(int tmu_num)
-{
-	ctrl_outb(ctrl_inb(TMU_012_TSTR) & ~(0x1<<tmu_num), TMU_012_TSTR);
-}
-
-static inline void _tmu_clear_status(int tmu_num)
-{
-	register unsigned long tmu_tcr = TMU0_TCR + (0xc*tmu_num);
-	/* Clear UNF bit */
-	ctrl_outw(ctrl_inw(tmu_tcr) & ~0x100, tmu_tcr);
-}
-
-static inline unsigned long _tmu_read(int tmu_num)
-{
-        return ctrl_inl(TMU0_TCNT+0xC*tmu_num);
-}
-
-static int tmu_timer_start(void)
-{
-	_tmu_start(TMU0);
-	_tmu_start(TMU1);
-	_tmu_set_irq(TMU0,1);
-	return 0;
-}
-
-static int tmu_timer_stop(void)
-{
-	_tmu_stop(TMU0);
-	_tmu_stop(TMU1);
-	_tmu_clear_status(TMU0);
-	return 0;
-}
-
-/*
- * also when the module_clk is scaled the TMU1
- * will show the same frequency
- */
-static int tmus_are_scaled;
-
-static cycle_t tmu_timer_read(struct clocksource *cs)
-{
-	return ((cycle_t)(~_tmu_read(TMU1)))<<tmus_are_scaled;
-}
-
-
-static unsigned long tmu_latest_interval[3];
-static void tmu_timer_set_interval(int tmu_num, unsigned long interval, unsigned int reload)
-{
-	unsigned long tmu_tcnt = TMU0_TCNT + tmu_num*0xC;
-	unsigned long tmu_tcor = TMU0_TCOR + tmu_num*0xC;
-
-	_tmu_stop(tmu_num);
-
-	ctrl_outl(interval, tmu_tcnt);
-	tmu_latest_interval[tmu_num] = interval;
-
-	/*
-	 * TCNT reloads from TCOR on underflow, clear it if we don't
-	 * intend to auto-reload
-	 */
-	ctrl_outl( reload ? interval : 0 , tmu_tcor);
-
-	_tmu_start(tmu_num);
-}
-
-static int tmu_set_next_event(unsigned long cycles,
-			      struct clock_event_device *evt)
-{
-	tmu_timer_set_interval(TMU0,cycles, evt->mode == CLOCK_EVT_MODE_PERIODIC);
-	_tmu_set_irq(TMU0,1);
-	return 0;
-}
-
-static void tmu_set_mode(enum clock_event_mode mode,
-			 struct clock_event_device *evt)
-{
-	switch (mode) {
-	case CLOCK_EVT_MODE_PERIODIC:
-		ctrl_outl(tmu_latest_interval[TMU0], TMU0_TCOR);
-		break;
-	case CLOCK_EVT_MODE_ONESHOT:
-		ctrl_outl(0, TMU0_TCOR);
-		break;
-	case CLOCK_EVT_MODE_UNUSED:
-	case CLOCK_EVT_MODE_SHUTDOWN:
-	case CLOCK_EVT_MODE_RESUME:
-		break;
-	}
-}
-
-static struct clock_event_device tmu0_clockevent = {
-	.name		= "tmu0",
-	.shift		= 32,
-	.features	= CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
-	.set_mode	= tmu_set_mode,
-	.set_next_event	= tmu_set_next_event,
-};
-
-static irqreturn_t tmu_timer_interrupt(int irq, void *dummy)
-{
-	struct clock_event_device *evt = &tmu0_clockevent;
-	_tmu_clear_status(TMU0);
-	_tmu_set_irq(TMU0,tmu0_clockevent.mode != CLOCK_EVT_MODE_ONESHOT);
-
-	switch (tmu0_clockevent.mode) {
-	case CLOCK_EVT_MODE_ONESHOT:
-	case CLOCK_EVT_MODE_PERIODIC:
-		evt->event_handler(evt);
-		break;
-	default:
-		break;
-	}
-
-	return IRQ_HANDLED;
-}
-
-static struct irqaction tmu0_irq = {
-	.name		= "periodic/oneshot timer",
-	.handler	= tmu_timer_interrupt,
-	.flags		= IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
-};
-
-static void __init tmu_clk_init(struct clk *clk)
-{
-	u8 divisor  = TMU_TCR_INIT & 0x7;
-	int tmu_num = clk->name[3]-'0';
-	ctrl_outw(TMU_TCR_INIT, TMU0_TCR+(tmu_num*0xC));
-	clk->rate = clk_get_rate(clk->parent) / (4 << (divisor << 1));
-}
-
-static void tmu_clk_recalc(struct clk *clk)
-{
-	int tmu_num = clk->name[3]-'0';
-	unsigned long prev_rate = clk_get_rate(clk);
-	unsigned long flags;
-	u8 divisor = ctrl_inw(TMU0_TCR+tmu_num*0xC) & 0x7;
-	clk->rate  = clk_get_rate(clk->parent) / (4 << (divisor << 1));
-
-	if(prev_rate==clk_get_rate(clk))
-		return;
-
-	if(tmu_num)
-		return; /* No more work on TMU1 */
-
-	local_irq_save(flags);
-	tmus_are_scaled = (prev_rate > clk->rate);
-
-	_tmu_stop(TMU0);
-
-	tmu0_clockevent.mult = div_sc(clk->rate, NSEC_PER_SEC,
-				tmu0_clockevent.shift);
-	tmu0_clockevent.max_delta_ns =
-			clockevent_delta2ns(-1, &tmu0_clockevent);
-	tmu0_clockevent.min_delta_ns =
-			clockevent_delta2ns(1, &tmu0_clockevent);
-
-	if (tmus_are_scaled)
-		tmu_latest_interval[TMU0] >>= 1;
-	else
-		tmu_latest_interval[TMU0] <<= 1;
-
-	tmu_timer_set_interval(TMU0,
-		tmu_latest_interval[TMU0],
-		tmu0_clockevent.mode == CLOCK_EVT_MODE_PERIODIC);
-
-	_tmu_start(TMU0);
-
-	local_irq_restore(flags);
-}
-
-static struct clk_ops tmu_clk_ops = {
-	.init		= tmu_clk_init,
-	.recalc		= tmu_clk_recalc,
-};
-
-static struct clk tmu0_clk = {
-	.name		= "tmu0_clk",
-	.ops		= &tmu_clk_ops,
-};
-
-static struct clk tmu1_clk = {
-	.name		= "tmu1_clk",
-	.ops		= &tmu_clk_ops,
-};
-
-static int tmu_timer_init(void)
-{
-	unsigned long interval;
-	unsigned long frequency;
-
-	setup_irq(CONFIG_SH_TIMER_IRQ, &tmu0_irq);
-
-	tmu0_clk.parent = clk_get(NULL, "module_clk");
-	tmu1_clk.parent = clk_get(NULL, "module_clk");
-
-	tmu_timer_stop();
-
-#if !defined(CONFIG_CPU_SUBTYPE_SH7720) && \
-    !defined(CONFIG_CPU_SUBTYPE_SH7721) && \
-    !defined(CONFIG_CPU_SUBTYPE_SH7760) && \
-    !defined(CONFIG_CPU_SUBTYPE_SH7785) && \
-    !defined(CONFIG_CPU_SUBTYPE_SH7786) && \
-    !defined(CONFIG_CPU_SUBTYPE_SHX3)
-	ctrl_outb(TMU_TOCR_INIT, TMU_TOCR);
-#endif
-
-	clk_register(&tmu0_clk);
-	clk_register(&tmu1_clk);
-	clk_enable(&tmu0_clk);
-	clk_enable(&tmu1_clk);
-
-	frequency = clk_get_rate(&tmu0_clk);
-	interval = (frequency + HZ / 2) / HZ;
-
-	tmu_timer_set_interval(TMU0,interval, 1);
-	tmu_timer_set_interval(TMU1,~0,1);
-
-	_tmu_start(TMU1);
-
-	clocksource_sh.rating = 200;
-	clocksource_sh.mask = CLOCKSOURCE_MASK(32);
-	clocksource_sh.read = tmu_timer_read;
-	clocksource_sh.shift = 10;
-	clocksource_sh.mult = clocksource_hz2mult(clk_get_rate(&tmu1_clk),
-						  clocksource_sh.shift);
-	clocksource_sh.flags = CLOCK_SOURCE_IS_CONTINUOUS;
-	clocksource_register(&clocksource_sh);
-
-	tmu0_clockevent.mult = div_sc(frequency, NSEC_PER_SEC,
-				      tmu0_clockevent.shift);
-	tmu0_clockevent.max_delta_ns =
-			clockevent_delta2ns(-1, &tmu0_clockevent);
-	tmu0_clockevent.min_delta_ns =
-			clockevent_delta2ns(1, &tmu0_clockevent);
-
-	tmu0_clockevent.cpumask = cpumask_of(0);
-	tmu0_clockevent.rating = 100;
-
-	clockevents_register_device(&tmu0_clockevent);
-
-	return 0;
-}
-
-static struct sys_timer_ops tmu_timer_ops = {
-	.init		= tmu_timer_init,
-	.start		= tmu_timer_start,
-	.stop		= tmu_timer_stop,
-};
-
-struct sys_timer tmu_timer = {
-	.name	= "tmu",
-	.ops	= &tmu_timer_ops,
-};
diff --git a/arch/sh/kernel/timers/timer.c b/arch/sh/kernel/timers/timer.c
index 920891a..f8812bd 100644
--- a/arch/sh/kernel/timers/timer.c
+++ b/arch/sh/kernel/timers/timer.c
@@ -14,9 +14,6 @@
 #include <asm/timer.h>
 
 static struct sys_timer *sys_timers[] = {
-#ifdef CONFIG_SH_TMU
-	&tmu_timer,
-#endif
 	NULL,
 };