[PATCH 12/19] clocksource: mips-gic: Combine with GIC clockevent driver
From: Andrew Bresticker
Date: Mon Oct 20 2014 - 15:04:27 EST
Combine the GIC clocksource driver with the GIC clockevent driver from
arch/mips/kernel/cevt-gic.c and remove the clockevent driver's separate
Kconfig symbol.
Signed-off-by: Andrew Bresticker <abrestic@xxxxxxxxxxxx>
---
arch/mips/Kconfig | 13 -----
arch/mips/include/asm/time.h | 2 +-
arch/mips/kernel/Makefile | 1 -
arch/mips/kernel/cevt-gic.c | 103 -----------------------------------
drivers/clocksource/mips-gic-timer.c | 90 ++++++++++++++++++++++++++++++
drivers/irqchip/irq-mips-gic.c | 2 +-
6 files changed, 92 insertions(+), 119 deletions(-)
delete mode 100644 arch/mips/kernel/cevt-gic.c
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 5b1d44b..88ef7f4 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -907,10 +907,6 @@ config CEVT_GT641XX
config CEVT_R4K
bool
-config CEVT_GIC
- select MIPS_CM
- bool
-
config CEVT_SB1250
bool
@@ -1880,15 +1876,6 @@ config FORCE_MAX_ZONEORDER
The page size is not necessarily 4KB. Keep this in mind
when choosing a value for this option.
-config CEVT_GIC
- bool "Use GIC global counter for clock events"
- depends on MIPS_GIC && !MIPS_SEAD3
- help
- Use the GIC global counter for the clock events. The R4K clock
- event driver is always present, so if the platform ends up not
- detecting a GIC, it will fall back to the R4K timer for the
- generation of clock events.
-
config BOARD_SCACHE
bool
diff --git a/arch/mips/include/asm/time.h b/arch/mips/include/asm/time.h
index 7969933..5f30aab 100644
--- a/arch/mips/include/asm/time.h
+++ b/arch/mips/include/asm/time.h
@@ -57,7 +57,7 @@ extern int gic_clockevent_init(void);
static inline int mips_clockevent_init(void)
{
-#if defined(CONFIG_CEVT_GIC)
+#if defined(CONFIG_CLKSRC_MIPS_GIC)
return (gic_clockevent_init() | r4k_clockevent_init());
#elif defined(CONFIG_CEVT_R4K)
return r4k_clockevent_init();
diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile
index 3d1ea51..e64fe1d 100644
--- a/arch/mips/kernel/Makefile
+++ b/arch/mips/kernel/Makefile
@@ -18,7 +18,6 @@ endif
obj-$(CONFIG_CEVT_BCM1480) += cevt-bcm1480.o
obj-$(CONFIG_CEVT_R4K) += cevt-r4k.o
obj-$(CONFIG_CEVT_DS1287) += cevt-ds1287.o
-obj-$(CONFIG_CEVT_GIC) += cevt-gic.o
obj-$(CONFIG_CEVT_GT641XX) += cevt-gt641xx.o
obj-$(CONFIG_CEVT_SB1250) += cevt-sb1250.o
obj-$(CONFIG_CEVT_TXX9) += cevt-txx9.o
diff --git a/arch/mips/kernel/cevt-gic.c b/arch/mips/kernel/cevt-gic.c
deleted file mode 100644
index 9caa68a..0000000
--- a/arch/mips/kernel/cevt-gic.c
+++ /dev/null
@@ -1,103 +0,0 @@
-/*
- * 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.
- *
- * Copyright (C) 2013 Imagination Technologies Ltd.
- */
-#include <linux/clockchips.h>
-#include <linux/interrupt.h>
-#include <linux/percpu.h>
-#include <linux/smp.h>
-#include <linux/irq.h>
-#include <linux/irqchip/mips-gic.h>
-
-#include <asm/time.h>
-#include <asm/mips-boards/maltaint.h>
-
-DEFINE_PER_CPU(struct clock_event_device, gic_clockevent_device);
-int gic_timer_irq_installed;
-
-
-static int gic_next_event(unsigned long delta, struct clock_event_device *evt)
-{
- u64 cnt;
- int res;
-
- cnt = gic_read_count();
- cnt += (u64)delta;
- gic_write_cpu_compare(cnt, cpumask_first(evt->cpumask));
- res = ((int)(gic_read_count() - cnt) >= 0) ? -ETIME : 0;
- return res;
-}
-
-void gic_set_clock_mode(enum clock_event_mode mode,
- struct clock_event_device *evt)
-{
- /* Nothing to do ... */
-}
-
-irqreturn_t gic_compare_interrupt(int irq, void *dev_id)
-{
- struct clock_event_device *cd;
- int cpu = smp_processor_id();
-
- gic_write_compare(gic_read_compare());
- cd = &per_cpu(gic_clockevent_device, cpu);
- cd->event_handler(cd);
- return IRQ_HANDLED;
-}
-
-struct irqaction gic_compare_irqaction = {
- .handler = gic_compare_interrupt,
- .flags = IRQF_PERCPU | IRQF_TIMER,
- .name = "timer",
-};
-
-
-void gic_event_handler(struct clock_event_device *dev)
-{
-}
-
-int gic_clockevent_init(void)
-{
- unsigned int cpu = smp_processor_id();
- struct clock_event_device *cd;
- unsigned int irq;
-
- if (!cpu_has_counter || !gic_frequency)
- return -ENXIO;
-
- irq = MIPS_GIC_IRQ_BASE + GIC_LOCAL_TO_HWIRQ(GIC_LOCAL_INT_COMPARE);
-
- cd = &per_cpu(gic_clockevent_device, cpu);
-
- cd->name = "MIPS GIC";
- cd->features = CLOCK_EVT_FEAT_ONESHOT |
- CLOCK_EVT_FEAT_C3STOP;
-
- clockevent_set_clock(cd, gic_frequency);
-
- /* Calculate the min / max delta */
- cd->max_delta_ns = clockevent_delta2ns(0x7fffffff, cd);
- cd->min_delta_ns = clockevent_delta2ns(0x300, cd);
-
- cd->rating = 300;
- cd->irq = irq;
- cd->cpumask = cpumask_of(cpu);
- cd->set_next_event = gic_next_event;
- cd->set_mode = gic_set_clock_mode;
- cd->event_handler = gic_event_handler;
-
- clockevents_register_device(cd);
-
- if (!gic_timer_irq_installed) {
- setup_percpu_irq(irq, &gic_compare_irqaction);
- gic_timer_irq_installed = 1;
- }
-
- enable_percpu_irq(irq, IRQ_TYPE_NONE);
-
-
- return 0;
-}
diff --git a/drivers/clocksource/mips-gic-timer.c b/drivers/clocksource/mips-gic-timer.c
index 0bf28e6..3cf5912 100644
--- a/drivers/clocksource/mips-gic-timer.c
+++ b/drivers/clocksource/mips-gic-timer.c
@@ -5,10 +5,100 @@
*
* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
*/
+#include <linux/clockchips.h>
#include <linux/init.h>
+#include <linux/interrupt.h>
#include <linux/irqchip/mips-gic.h>
+#include <linux/percpu.h>
+#include <linux/smp.h>
#include <linux/time.h>
+#include <asm/time.h>
+
+DEFINE_PER_CPU(struct clock_event_device, gic_clockevent_device);
+int gic_timer_irq_installed;
+
+static int gic_next_event(unsigned long delta, struct clock_event_device *evt)
+{
+ u64 cnt;
+ int res;
+
+ cnt = gic_read_count();
+ cnt += (u64)delta;
+ gic_write_cpu_compare(cnt, cpumask_first(evt->cpumask));
+ res = ((int)(gic_read_count() - cnt) >= 0) ? -ETIME : 0;
+ return res;
+}
+
+void gic_set_clock_mode(enum clock_event_mode mode,
+ struct clock_event_device *evt)
+{
+ /* Nothing to do ... */
+}
+
+irqreturn_t gic_compare_interrupt(int irq, void *dev_id)
+{
+ struct clock_event_device *cd;
+ int cpu = smp_processor_id();
+
+ gic_write_compare(gic_read_compare());
+ cd = &per_cpu(gic_clockevent_device, cpu);
+ cd->event_handler(cd);
+ return IRQ_HANDLED;
+}
+
+struct irqaction gic_compare_irqaction = {
+ .handler = gic_compare_interrupt,
+ .flags = IRQF_PERCPU | IRQF_TIMER,
+ .name = "timer",
+};
+
+void gic_event_handler(struct clock_event_device *dev)
+{
+}
+
+int gic_clockevent_init(void)
+{
+ unsigned int cpu = smp_processor_id();
+ struct clock_event_device *cd;
+ unsigned int irq;
+
+ if (!cpu_has_counter || !gic_frequency)
+ return -ENXIO;
+
+ irq = MIPS_GIC_IRQ_BASE + GIC_LOCAL_TO_HWIRQ(GIC_LOCAL_INT_COMPARE);
+
+ cd = &per_cpu(gic_clockevent_device, cpu);
+
+ cd->name = "MIPS GIC";
+ cd->features = CLOCK_EVT_FEAT_ONESHOT |
+ CLOCK_EVT_FEAT_C3STOP;
+
+ clockevent_set_clock(cd, gic_frequency);
+
+ /* Calculate the min / max delta */
+ cd->max_delta_ns = clockevent_delta2ns(0x7fffffff, cd);
+ cd->min_delta_ns = clockevent_delta2ns(0x300, cd);
+
+ cd->rating = 300;
+ cd->irq = irq;
+ cd->cpumask = cpumask_of(cpu);
+ cd->set_next_event = gic_next_event;
+ cd->set_mode = gic_set_clock_mode;
+ cd->event_handler = gic_event_handler;
+
+ clockevents_register_device(cd);
+
+ if (!gic_timer_irq_installed) {
+ setup_percpu_irq(irq, &gic_compare_irqaction);
+ gic_timer_irq_installed = 1;
+ }
+
+ enable_percpu_irq(irq, IRQ_TYPE_NONE);
+
+ return 0;
+}
+
static cycle_t gic_hpt_read(struct clocksource *cs)
{
return gic_read_count();
diff --git a/drivers/irqchip/irq-mips-gic.c b/drivers/irqchip/irq-mips-gic.c
index 99687ed..5c856e6 100644
--- a/drivers/irqchip/irq-mips-gic.c
+++ b/drivers/irqchip/irq-mips-gic.c
@@ -103,7 +103,7 @@ static inline void gic_map_to_vpe(unsigned int intr, unsigned int vpe)
GIC_SH_MAP_TO_VPE_REG_BIT(vpe));
}
-#if defined(CONFIG_CLKSRC_MIPS_GIC) || defined(CONFIG_CEVT_GIC)
+#ifdef CONFIG_CLKSRC_MIPS_GIC
cycle_t gic_read_count(void)
{
unsigned int hi, hi2, lo;
--
2.1.0.rc2.206.gedb03e5
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