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meta-ti/recipes-kernel/linux/linux-3.0/pm-wip/voltdm/0016-omap2-Rename-timer-gp.c-into-timer.c-to-combine-time.patch
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Koen Kooi 18ff66cb77 linux 3.0: update to 3.0.17 
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
2012-01-13 20:35:15 +01:00

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From 5cdb1497ccc5b9dae8795e1e5e9c74f11e4e7401 Mon Sep 17 00:00:00 2001
From: Tony Lindgren <tony@atomide.com>
Date: Tue, 29 Mar 2011 15:54:50 -0700
Subject: [PATCH 016/149] omap2+: Rename timer-gp.c into timer.c to combine timer init functions
We can keep everything sys_timer and gptimer.c related code in
timer.c as the code will be very minimal.
Later on we can also remove timer-mpu.c, as it can be called from
omap4_timer_init function.
This allows us to get rid of confusing existing files. We currently
have timer-gp.c, timer-mpu.c, and patches have been posted to add
dmtimer.c. There's no need to have these multiple files, we can
put everything into timer.c.
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
arch/arm/mach-omap2/Makefile | 2 +-
arch/arm/mach-omap2/timer-gp.c | 342 ----------------------------------------
arch/arm/mach-omap2/timer.c | 342 ++++++++++++++++++++++++++++++++++++++++
3 files changed, 343 insertions(+), 343 deletions(-)
delete mode 100644 arch/arm/mach-omap2/timer-gp.c
create mode 100644 arch/arm/mach-omap2/timer.c
diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index b148077..adbe82d 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -3,7 +3,7 @@
#
# Common support
-obj-y := id.o io.o control.o mux.o devices.o serial.o gpmc.o timer-gp.o pm.o \
+obj-y := id.o io.o control.o mux.o devices.o serial.o gpmc.o timer.o pm.o \
common.o gpio.o dma.o wd_timer.o
omap-2-3-common = irq.o sdrc.o
diff --git a/arch/arm/mach-omap2/timer-gp.c b/arch/arm/mach-omap2/timer-gp.c
deleted file mode 100644
index ab1931c..0000000
--- a/arch/arm/mach-omap2/timer-gp.c
+++ /dev/null
@@ -1,342 +0,0 @@
-/*
- * linux/arch/arm/mach-omap2/timer-gp.c
- *
- * OMAP2 GP timer support.
- *
- * Copyright (C) 2009 Nokia Corporation
- *
- * Update to use new clocksource/clockevent layers
- * Author: Kevin Hilman, MontaVista Software, Inc. <source@mvista.com>
- * Copyright (C) 2007 MontaVista Software, Inc.
- *
- * Original driver:
- * Copyright (C) 2005 Nokia Corporation
- * Author: Paul Mundt <paul.mundt@nokia.com>
- * Juha Yrjölä <juha.yrjola@nokia.com>
- * OMAP Dual-mode timer framework support by Timo Teras
- *
- * Some parts based off of TI's 24xx code:
- *
- * Copyright (C) 2004-2009 Texas Instruments, Inc.
- *
- * Roughly modelled after the OMAP1 MPU timer code.
- * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
- *
- * 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/time.h>
-#include <linux/interrupt.h>
-#include <linux/err.h>
-#include <linux/clk.h>
-#include <linux/delay.h>
-#include <linux/irq.h>
-#include <linux/clocksource.h>
-#include <linux/clockchips.h>
-
-#include <asm/mach/time.h>
-#include <plat/dmtimer.h>
-#include <asm/localtimer.h>
-#include <asm/sched_clock.h>
-#include <plat/common.h>
-#include <plat/omap_hwmod.h>
-
-/* Parent clocks, eventually these will come from the clock framework */
-
-#define OMAP2_MPU_SOURCE "sys_ck"
-#define OMAP3_MPU_SOURCE OMAP2_MPU_SOURCE
-#define OMAP4_MPU_SOURCE "sys_clkin_ck"
-#define OMAP2_32K_SOURCE "func_32k_ck"
-#define OMAP3_32K_SOURCE "omap_32k_fck"
-#define OMAP4_32K_SOURCE "sys_32k_ck"
-
-#ifdef CONFIG_OMAP_32K_TIMER
-#define OMAP2_CLKEV_SOURCE OMAP2_32K_SOURCE
-#define OMAP3_CLKEV_SOURCE OMAP3_32K_SOURCE
-#define OMAP4_CLKEV_SOURCE OMAP4_32K_SOURCE
-#define OMAP3_SECURE_TIMER 12
-#else
-#define OMAP2_CLKEV_SOURCE OMAP2_MPU_SOURCE
-#define OMAP3_CLKEV_SOURCE OMAP3_MPU_SOURCE
-#define OMAP4_CLKEV_SOURCE OMAP4_MPU_SOURCE
-#define OMAP3_SECURE_TIMER 1
-#endif
-
-/* MAX_GPTIMER_ID: number of GPTIMERs on the chip */
-#define MAX_GPTIMER_ID 12
-
-u32 sys_timer_reserved;
-
-/* Clockevent code */
-
-static struct omap_dm_timer clkev;
-static struct clock_event_device clockevent_gpt;
-
-static irqreturn_t omap2_gp_timer_interrupt(int irq, void *dev_id)
-{
- struct clock_event_device *evt = &clockevent_gpt;
-
- __omap_dm_timer_write_status(clkev.io_base, OMAP_TIMER_INT_OVERFLOW);
-
- evt->event_handler(evt);
- return IRQ_HANDLED;
-}
-
-static struct irqaction omap2_gp_timer_irq = {
- .name = "gp timer",
- .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
- .handler = omap2_gp_timer_interrupt,
-};
-
-static int omap2_gp_timer_set_next_event(unsigned long cycles,
- struct clock_event_device *evt)
-{
- __omap_dm_timer_load_start(clkev.io_base, OMAP_TIMER_CTRL_ST,
- 0xffffffff - cycles, 1);
-
- return 0;
-}
-
-static void omap2_gp_timer_set_mode(enum clock_event_mode mode,
- struct clock_event_device *evt)
-{
- u32 period;
-
- __omap_dm_timer_stop(clkev.io_base, 1, clkev.rate);
-
- switch (mode) {
- case CLOCK_EVT_MODE_PERIODIC:
- period = clkev.rate / HZ;
- period -= 1;
- /* Looks like we need to first set the load value separately */
- __omap_dm_timer_write(clkev.io_base, OMAP_TIMER_LOAD_REG,
- 0xffffffff - period, 1);
- __omap_dm_timer_load_start(clkev.io_base,
- OMAP_TIMER_CTRL_AR | OMAP_TIMER_CTRL_ST,
- 0xffffffff - period, 1);
- break;
- case CLOCK_EVT_MODE_ONESHOT:
- break;
- case CLOCK_EVT_MODE_UNUSED:
- case CLOCK_EVT_MODE_SHUTDOWN:
- case CLOCK_EVT_MODE_RESUME:
- break;
- }
-}
-
-static struct clock_event_device clockevent_gpt = {
- .name = "gp timer",
- .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
- .shift = 32,
- .set_next_event = omap2_gp_timer_set_next_event,
- .set_mode = omap2_gp_timer_set_mode,
-};
-
-static int __init omap_dm_timer_init_one(struct omap_dm_timer *timer,
- int gptimer_id,
- const char *fck_source)
-{
- char name[10]; /* 10 = sizeof("gptXX_Xck0") */
- struct omap_hwmod *oh;
- size_t size;
- int res = 0;
-
- sprintf(name, "timer%d", gptimer_id);
- omap_hwmod_setup_one(name);
- oh = omap_hwmod_lookup(name);
- if (!oh)
- return -ENODEV;
-
- timer->irq = oh->mpu_irqs[0].irq;
- timer->phys_base = oh->slaves[0]->addr->pa_start;
- size = oh->slaves[0]->addr->pa_end - timer->phys_base;
-
- /* Static mapping, never released */
- timer->io_base = ioremap(timer->phys_base, size);
- if (!timer->io_base)
- return -ENXIO;
-
- /* After the dmtimer is using hwmod these clocks won't be needed */
- sprintf(name, "gpt%d_fck", gptimer_id);
- timer->fclk = clk_get(NULL, name);
- if (IS_ERR(timer->fclk))
- return -ENODEV;
-
- sprintf(name, "gpt%d_ick", gptimer_id);
- timer->iclk = clk_get(NULL, name);
- if (IS_ERR(timer->iclk)) {
- clk_put(timer->fclk);
- return -ENODEV;
- }
-
- omap_hwmod_enable(oh);
-
- sys_timer_reserved |= (1 << (gptimer_id - 1));
-
- if (gptimer_id != 12) {
- struct clk *src;
-
- src = clk_get(NULL, fck_source);
- if (IS_ERR(src)) {
- res = -EINVAL;
- } else {
- res = __omap_dm_timer_set_source(timer->fclk, src);
- if (IS_ERR_VALUE(res))
- pr_warning("%s: timer%i cannot set source\n",
- __func__, gptimer_id);
- clk_put(src);
- }
- }
- __omap_dm_timer_reset(timer->io_base, 1, 1);
- timer->posted = 1;
-
- timer->rate = clk_get_rate(timer->fclk);
-
- timer->reserved = 1;
-
- return res;
-}
-
-static void __init omap2_gp_clockevent_init(int gptimer_id,
- const char *fck_source)
-{
- int res;
-
- res = omap_dm_timer_init_one(&clkev, gptimer_id, fck_source);
- BUG_ON(res);
-
- omap2_gp_timer_irq.dev_id = (void *)&clkev;
- setup_irq(clkev.irq, &omap2_gp_timer_irq);
-
- __omap_dm_timer_int_enable(clkev.io_base, OMAP_TIMER_INT_OVERFLOW);
-
- clockevent_gpt.mult = div_sc(clkev.rate, NSEC_PER_SEC,
- clockevent_gpt.shift);
- clockevent_gpt.max_delta_ns =
- clockevent_delta2ns(0xffffffff, &clockevent_gpt);
- clockevent_gpt.min_delta_ns =
- clockevent_delta2ns(3, &clockevent_gpt);
- /* Timer internal resynch latency. */
-
- clockevent_gpt.cpumask = cpumask_of(0);
- clockevents_register_device(&clockevent_gpt);
-
- pr_info("OMAP clockevent source: GPTIMER%d at %lu Hz\n",
- gptimer_id, clkev.rate);
-}
-
-/* Clocksource code */
-
-#ifdef CONFIG_OMAP_32K_TIMER
-/*
- * When 32k-timer is enabled, don't use GPTimer for clocksource
- * instead, just leave default clocksource which uses the 32k
- * sync counter. See clocksource setup in plat-omap/counter_32k.c
- */
-
-static void __init omap2_gp_clocksource_init(int unused, const char *dummy)
-{
- omap_init_clocksource_32k();
-}
-
-#else
-
-static struct omap_dm_timer clksrc;
-
-/*
- * clocksource
- */
-static DEFINE_CLOCK_DATA(cd);
-static cycle_t clocksource_read_cycles(struct clocksource *cs)
-{
- return (cycle_t)__omap_dm_timer_read_counter(clksrc.io_base, 1);
-}
-
-static struct clocksource clocksource_gpt = {
- .name = "gp timer",
- .rating = 300,
- .read = clocksource_read_cycles,
- .mask = CLOCKSOURCE_MASK(32),
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
-};
-
-static void notrace dmtimer_update_sched_clock(void)
-{
- u32 cyc;
-
- cyc = __omap_dm_timer_read_counter(clksrc.io_base, 1);
-
- update_sched_clock(&cd, cyc, (u32)~0);
-}
-
-unsigned long long notrace sched_clock(void)
-{
- u32 cyc = 0;
-
- if (clksrc.reserved)
- cyc = __omap_dm_timer_read_counter(clksrc.io_base, 1);
-
- return cyc_to_sched_clock(&cd, cyc, (u32)~0);
-}
-
-/* Setup free-running counter for clocksource */
-static void __init omap2_gp_clocksource_init(int gptimer_id,
- const char *fck_source)
-{
- int res;
-
- res = omap_dm_timer_init_one(&clksrc, gptimer_id, fck_source);
- BUG_ON(res);
-
- pr_info("OMAP clocksource: GPTIMER%d at %lu Hz\n",
- gptimer_id, clksrc.rate);
-
- __omap_dm_timer_load_start(clksrc.io_base, OMAP_TIMER_CTRL_ST, 0, 1);
- init_sched_clock(&cd, dmtimer_update_sched_clock, 32, clksrc.rate);
-
- if (clocksource_register_hz(&clocksource_gpt, clksrc.rate))
- pr_err("Could not register clocksource %s\n",
- clocksource_gpt.name);
-}
-#endif
-
-#define OMAP_SYS_TIMER_INIT(name, clkev_nr, clkev_src, \
- clksrc_nr, clksrc_src) \
-static void __init omap##name##_timer_init(void) \
-{ \
- omap2_gp_clockevent_init((clkev_nr), clkev_src); \
- omap2_gp_clocksource_init((clksrc_nr), clksrc_src); \
-}
-
-#define OMAP_SYS_TIMER(name) \
-struct sys_timer omap##name##_timer = { \
- .init = omap##name##_timer_init, \
-};
-
-#ifdef CONFIG_ARCH_OMAP2
-OMAP_SYS_TIMER_INIT(2, 1, OMAP2_CLKEV_SOURCE, 2, OMAP2_MPU_SOURCE)
-OMAP_SYS_TIMER(2)
-#endif
-
-#ifdef CONFIG_ARCH_OMAP3
-OMAP_SYS_TIMER_INIT(3, 1, OMAP3_CLKEV_SOURCE, 2, OMAP3_MPU_SOURCE)
-OMAP_SYS_TIMER(3)
-OMAP_SYS_TIMER_INIT(3_secure, OMAP3_SECURE_TIMER, OMAP3_CLKEV_SOURCE,
- 2, OMAP3_MPU_SOURCE)
-OMAP_SYS_TIMER(3_secure)
-#endif
-
-#ifdef CONFIG_ARCH_OMAP4
-static void __init omap4_timer_init(void)
-{
-#ifdef CONFIG_LOCAL_TIMERS
- twd_base = ioremap(OMAP44XX_LOCAL_TWD_BASE, SZ_256);
- BUG_ON(!twd_base);
-#endif
- omap2_gp_clockevent_init(1, OMAP4_CLKEV_SOURCE);
- omap2_gp_clocksource_init(2, OMAP4_MPU_SOURCE);
-}
-OMAP_SYS_TIMER(4)
-#endif
diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c
new file mode 100644
index 0000000..e964072
--- /dev/null
+++ b/arch/arm/mach-omap2/timer.c
@@ -0,0 +1,342 @@
+/*
+ * linux/arch/arm/mach-omap2/timer.c
+ *
+ * OMAP2 GP timer support.
+ *
+ * Copyright (C) 2009 Nokia Corporation
+ *
+ * Update to use new clocksource/clockevent layers
+ * Author: Kevin Hilman, MontaVista Software, Inc. <source@mvista.com>
+ * Copyright (C) 2007 MontaVista Software, Inc.
+ *
+ * Original driver:
+ * Copyright (C) 2005 Nokia Corporation
+ * Author: Paul Mundt <paul.mundt@nokia.com>
+ * Juha Yrjölä <juha.yrjola@nokia.com>
+ * OMAP Dual-mode timer framework support by Timo Teras
+ *
+ * Some parts based off of TI's 24xx code:
+ *
+ * Copyright (C) 2004-2009 Texas Instruments, Inc.
+ *
+ * Roughly modelled after the OMAP1 MPU timer code.
+ * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
+ *
+ * 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/time.h>
+#include <linux/interrupt.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <linux/clocksource.h>
+#include <linux/clockchips.h>
+
+#include <asm/mach/time.h>
+#include <plat/dmtimer.h>
+#include <asm/localtimer.h>
+#include <asm/sched_clock.h>
+#include <plat/common.h>
+#include <plat/omap_hwmod.h>
+
+/* Parent clocks, eventually these will come from the clock framework */
+
+#define OMAP2_MPU_SOURCE "sys_ck"
+#define OMAP3_MPU_SOURCE OMAP2_MPU_SOURCE
+#define OMAP4_MPU_SOURCE "sys_clkin_ck"
+#define OMAP2_32K_SOURCE "func_32k_ck"
+#define OMAP3_32K_SOURCE "omap_32k_fck"
+#define OMAP4_32K_SOURCE "sys_32k_ck"
+
+#ifdef CONFIG_OMAP_32K_TIMER
+#define OMAP2_CLKEV_SOURCE OMAP2_32K_SOURCE
+#define OMAP3_CLKEV_SOURCE OMAP3_32K_SOURCE
+#define OMAP4_CLKEV_SOURCE OMAP4_32K_SOURCE
+#define OMAP3_SECURE_TIMER 12
+#else
+#define OMAP2_CLKEV_SOURCE OMAP2_MPU_SOURCE
+#define OMAP3_CLKEV_SOURCE OMAP3_MPU_SOURCE
+#define OMAP4_CLKEV_SOURCE OMAP4_MPU_SOURCE
+#define OMAP3_SECURE_TIMER 1
+#endif
+
+/* MAX_GPTIMER_ID: number of GPTIMERs on the chip */
+#define MAX_GPTIMER_ID 12
+
+u32 sys_timer_reserved;
+
+/* Clockevent code */
+
+static struct omap_dm_timer clkev;
+static struct clock_event_device clockevent_gpt;
+
+static irqreturn_t omap2_gp_timer_interrupt(int irq, void *dev_id)
+{
+ struct clock_event_device *evt = &clockevent_gpt;
+
+ __omap_dm_timer_write_status(clkev.io_base, OMAP_TIMER_INT_OVERFLOW);
+
+ evt->event_handler(evt);
+ return IRQ_HANDLED;
+}
+
+static struct irqaction omap2_gp_timer_irq = {
+ .name = "gp timer",
+ .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
+ .handler = omap2_gp_timer_interrupt,
+};
+
+static int omap2_gp_timer_set_next_event(unsigned long cycles,
+ struct clock_event_device *evt)
+{
+ __omap_dm_timer_load_start(clkev.io_base, OMAP_TIMER_CTRL_ST,
+ 0xffffffff - cycles, 1);
+
+ return 0;
+}
+
+static void omap2_gp_timer_set_mode(enum clock_event_mode mode,
+ struct clock_event_device *evt)
+{
+ u32 period;
+
+ __omap_dm_timer_stop(clkev.io_base, 1, clkev.rate);
+
+ switch (mode) {
+ case CLOCK_EVT_MODE_PERIODIC:
+ period = clkev.rate / HZ;
+ period -= 1;
+ /* Looks like we need to first set the load value separately */
+ __omap_dm_timer_write(clkev.io_base, OMAP_TIMER_LOAD_REG,
+ 0xffffffff - period, 1);
+ __omap_dm_timer_load_start(clkev.io_base,
+ OMAP_TIMER_CTRL_AR | OMAP_TIMER_CTRL_ST,
+ 0xffffffff - period, 1);
+ break;
+ case CLOCK_EVT_MODE_ONESHOT:
+ break;
+ case CLOCK_EVT_MODE_UNUSED:
+ case CLOCK_EVT_MODE_SHUTDOWN:
+ case CLOCK_EVT_MODE_RESUME:
+ break;
+ }
+}
+
+static struct clock_event_device clockevent_gpt = {
+ .name = "gp timer",
+ .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
+ .shift = 32,
+ .set_next_event = omap2_gp_timer_set_next_event,
+ .set_mode = omap2_gp_timer_set_mode,
+};
+
+static int __init omap_dm_timer_init_one(struct omap_dm_timer *timer,
+ int gptimer_id,
+ const char *fck_source)
+{
+ char name[10]; /* 10 = sizeof("gptXX_Xck0") */
+ struct omap_hwmod *oh;
+ size_t size;
+ int res = 0;
+
+ sprintf(name, "timer%d", gptimer_id);
+ omap_hwmod_setup_one(name);
+ oh = omap_hwmod_lookup(name);
+ if (!oh)
+ return -ENODEV;
+
+ timer->irq = oh->mpu_irqs[0].irq;
+ timer->phys_base = oh->slaves[0]->addr->pa_start;
+ size = oh->slaves[0]->addr->pa_end - timer->phys_base;
+
+ /* Static mapping, never released */
+ timer->io_base = ioremap(timer->phys_base, size);
+ if (!timer->io_base)
+ return -ENXIO;
+
+ /* After the dmtimer is using hwmod these clocks won't be needed */
+ sprintf(name, "gpt%d_fck", gptimer_id);
+ timer->fclk = clk_get(NULL, name);
+ if (IS_ERR(timer->fclk))
+ return -ENODEV;
+
+ sprintf(name, "gpt%d_ick", gptimer_id);
+ timer->iclk = clk_get(NULL, name);
+ if (IS_ERR(timer->iclk)) {
+ clk_put(timer->fclk);
+ return -ENODEV;
+ }
+
+ omap_hwmod_enable(oh);
+
+ sys_timer_reserved |= (1 << (gptimer_id - 1));
+
+ if (gptimer_id != 12) {
+ struct clk *src;
+
+ src = clk_get(NULL, fck_source);
+ if (IS_ERR(src)) {
+ res = -EINVAL;
+ } else {
+ res = __omap_dm_timer_set_source(timer->fclk, src);
+ if (IS_ERR_VALUE(res))
+ pr_warning("%s: timer%i cannot set source\n",
+ __func__, gptimer_id);
+ clk_put(src);
+ }
+ }
+ __omap_dm_timer_reset(timer->io_base, 1, 1);
+ timer->posted = 1;
+
+ timer->rate = clk_get_rate(timer->fclk);
+
+ timer->reserved = 1;
+
+ return res;
+}
+
+static void __init omap2_gp_clockevent_init(int gptimer_id,
+ const char *fck_source)
+{
+ int res;
+
+ res = omap_dm_timer_init_one(&clkev, gptimer_id, fck_source);
+ BUG_ON(res);
+
+ omap2_gp_timer_irq.dev_id = (void *)&clkev;
+ setup_irq(clkev.irq, &omap2_gp_timer_irq);
+
+ __omap_dm_timer_int_enable(clkev.io_base, OMAP_TIMER_INT_OVERFLOW);
+
+ clockevent_gpt.mult = div_sc(clkev.rate, NSEC_PER_SEC,
+ clockevent_gpt.shift);
+ clockevent_gpt.max_delta_ns =
+ clockevent_delta2ns(0xffffffff, &clockevent_gpt);
+ clockevent_gpt.min_delta_ns =
+ clockevent_delta2ns(3, &clockevent_gpt);
+ /* Timer internal resynch latency. */
+
+ clockevent_gpt.cpumask = cpumask_of(0);
+ clockevents_register_device(&clockevent_gpt);
+
+ pr_info("OMAP clockevent source: GPTIMER%d at %lu Hz\n",
+ gptimer_id, clkev.rate);
+}
+
+/* Clocksource code */
+
+#ifdef CONFIG_OMAP_32K_TIMER
+/*
+ * When 32k-timer is enabled, don't use GPTimer for clocksource
+ * instead, just leave default clocksource which uses the 32k
+ * sync counter. See clocksource setup in plat-omap/counter_32k.c
+ */
+
+static void __init omap2_gp_clocksource_init(int unused, const char *dummy)
+{
+ omap_init_clocksource_32k();
+}
+
+#else
+
+static struct omap_dm_timer clksrc;
+
+/*
+ * clocksource
+ */
+static DEFINE_CLOCK_DATA(cd);
+static cycle_t clocksource_read_cycles(struct clocksource *cs)
+{
+ return (cycle_t)__omap_dm_timer_read_counter(clksrc.io_base, 1);
+}
+
+static struct clocksource clocksource_gpt = {
+ .name = "gp timer",
+ .rating = 300,
+ .read = clocksource_read_cycles,
+ .mask = CLOCKSOURCE_MASK(32),
+ .flags = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+static void notrace dmtimer_update_sched_clock(void)
+{
+ u32 cyc;
+
+ cyc = __omap_dm_timer_read_counter(clksrc.io_base, 1);
+
+ update_sched_clock(&cd, cyc, (u32)~0);
+}
+
+unsigned long long notrace sched_clock(void)
+{
+ u32 cyc = 0;
+
+ if (clksrc.reserved)
+ cyc = __omap_dm_timer_read_counter(clksrc.io_base, 1);
+
+ return cyc_to_sched_clock(&cd, cyc, (u32)~0);
+}
+
+/* Setup free-running counter for clocksource */
+static void __init omap2_gp_clocksource_init(int gptimer_id,
+ const char *fck_source)
+{
+ int res;
+
+ res = omap_dm_timer_init_one(&clksrc, gptimer_id, fck_source);
+ BUG_ON(res);
+
+ pr_info("OMAP clocksource: GPTIMER%d at %lu Hz\n",
+ gptimer_id, clksrc.rate);
+
+ __omap_dm_timer_load_start(clksrc.io_base, OMAP_TIMER_CTRL_ST, 0, 1);
+ init_sched_clock(&cd, dmtimer_update_sched_clock, 32, clksrc.rate);
+
+ if (clocksource_register_hz(&clocksource_gpt, clksrc.rate))
+ pr_err("Could not register clocksource %s\n",
+ clocksource_gpt.name);
+}
+#endif
+
+#define OMAP_SYS_TIMER_INIT(name, clkev_nr, clkev_src, \
+ clksrc_nr, clksrc_src) \
+static void __init omap##name##_timer_init(void) \
+{ \
+ omap2_gp_clockevent_init((clkev_nr), clkev_src); \
+ omap2_gp_clocksource_init((clksrc_nr), clksrc_src); \
+}
+
+#define OMAP_SYS_TIMER(name) \
+struct sys_timer omap##name##_timer = { \
+ .init = omap##name##_timer_init, \
+};
+
+#ifdef CONFIG_ARCH_OMAP2
+OMAP_SYS_TIMER_INIT(2, 1, OMAP2_CLKEV_SOURCE, 2, OMAP2_MPU_SOURCE)
+OMAP_SYS_TIMER(2)
+#endif
+
+#ifdef CONFIG_ARCH_OMAP3
+OMAP_SYS_TIMER_INIT(3, 1, OMAP3_CLKEV_SOURCE, 2, OMAP3_MPU_SOURCE)
+OMAP_SYS_TIMER(3)
+OMAP_SYS_TIMER_INIT(3_secure, OMAP3_SECURE_TIMER, OMAP3_CLKEV_SOURCE,
+ 2, OMAP3_MPU_SOURCE)
+OMAP_SYS_TIMER(3_secure)
+#endif
+
+#ifdef CONFIG_ARCH_OMAP4
+static void __init omap4_timer_init(void)
+{
+#ifdef CONFIG_LOCAL_TIMERS
+ twd_base = ioremap(OMAP44XX_LOCAL_TWD_BASE, SZ_256);
+ BUG_ON(!twd_base);
+#endif
+ omap2_gp_clockevent_init(1, OMAP4_CLKEV_SOURCE);
+ omap2_gp_clocksource_init(2, OMAP4_MPU_SOURCE);
+}
+OMAP_SYS_TIMER(4)
+#endif
--
1.7.2.5
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