summaryrefslogtreecommitdiff
path: root/arch/arm/mach-omap2/timer.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-omap2/timer.c')
-rw-r--r--arch/arm/mach-omap2/timer.c235
1 files changed, 123 insertions, 112 deletions
diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c
index 684d2fc3d485..b9cff72ceaec 100644
--- a/arch/arm/mach-omap2/timer.c
+++ b/arch/arm/mach-omap2/timer.c
@@ -39,6 +39,8 @@
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
+#include <linux/platform_device.h>
+#include <linux/platform_data/dmtimer-omap.h>
#include <asm/mach/time.h>
#include <asm/smp_twd.h>
@@ -64,20 +66,6 @@
#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
-#define TIMER_PROP_SECURE "ti,timer-secure"
-#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
-#define TIMER_PROP_SECURE "ti,timer-alwon"
-#endif
-
#define REALTIME_COUNTER_BASE 0x48243200
#define INCREMENTER_NUMERATOR_OFFSET 0x10
#define INCREMENTER_DENUMERATOR_RELOAD_OFFSET 0x14
@@ -108,7 +96,7 @@ static int omap2_gp_timer_set_next_event(unsigned long cycles,
struct clock_event_device *evt)
{
__omap_dm_timer_load_start(&clkev, OMAP_TIMER_CTRL_ST,
- 0xffffffff - cycles, 1);
+ 0xffffffff - cycles, OMAP_TIMER_POSTED);
return 0;
}
@@ -118,7 +106,7 @@ static void omap2_gp_timer_set_mode(enum clock_event_mode mode,
{
u32 period;
- __omap_dm_timer_stop(&clkev, 1, clkev.rate);
+ __omap_dm_timer_stop(&clkev, OMAP_TIMER_POSTED, clkev.rate);
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
@@ -126,10 +114,10 @@ static void omap2_gp_timer_set_mode(enum clock_event_mode mode,
period -= 1;
/* Looks like we need to first set the load value separately */
__omap_dm_timer_write(&clkev, OMAP_TIMER_LOAD_REG,
- 0xffffffff - period, 1);
+ 0xffffffff - period, OMAP_TIMER_POSTED);
__omap_dm_timer_load_start(&clkev,
OMAP_TIMER_CTRL_AR | OMAP_TIMER_CTRL_ST,
- 0xffffffff - period, 1);
+ 0xffffffff - period, OMAP_TIMER_POSTED);
break;
case CLOCK_EVT_MODE_ONESHOT:
break;
@@ -160,11 +148,6 @@ static struct of_device_id omap_timer_match[] __initdata = {
{ }
};
-static struct of_device_id omap_counter_match[] __initdata = {
- { .compatible = "ti,omap-counter32k", },
- { }
-};
-
/**
* omap_get_timer_dt - get a timer using device-tree
* @match - device-tree match structure for matching a device type
@@ -222,19 +205,31 @@ void __init omap_dmtimer_init(void)
}
}
+/**
+ * omap_dm_timer_get_errata - get errata flags for a timer
+ *
+ * Get the timer errata flags that are specific to the OMAP device being used.
+ */
+u32 __init omap_dm_timer_get_errata(void)
+{
+ if (cpu_is_omap24xx())
+ return 0;
+
+ return OMAP_TIMER_ERRATA_I103_I767;
+}
+
static int __init omap_dm_timer_init_one(struct omap_dm_timer *timer,
int gptimer_id,
const char *fck_source,
- const char *property)
+ const char *property,
+ int posted)
{
char name[10]; /* 10 = sizeof("gptXX_Xck0") */
const char *oh_name;
struct device_node *np;
struct omap_hwmod *oh;
- struct resource irq_rsrc, mem_rsrc;
- size_t size;
- int res = 0;
- int r;
+ struct resource irq, mem;
+ int r = 0;
if (of_have_populated_dt()) {
np = omap_get_timer_dt(omap_timer_match, NULL);
@@ -260,28 +255,24 @@ static int __init omap_dm_timer_init_one(struct omap_dm_timer *timer,
oh_name = name;
}
- omap_hwmod_setup_one(oh_name);
oh = omap_hwmod_lookup(oh_name);
-
if (!oh)
return -ENODEV;
if (!of_have_populated_dt()) {
r = omap_hwmod_get_resource_byname(oh, IORESOURCE_IRQ, NULL,
- &irq_rsrc);
+ &irq);
if (r)
return -ENXIO;
- timer->irq = irq_rsrc.start;
+ timer->irq = irq.start;
r = omap_hwmod_get_resource_byname(oh, IORESOURCE_MEM, NULL,
- &mem_rsrc);
+ &mem);
if (r)
return -ENXIO;
- timer->phys_base = mem_rsrc.start;
- size = mem_rsrc.end - mem_rsrc.start;
/* Static mapping, never released */
- timer->io_base = ioremap(timer->phys_base, size);
+ timer->io_base = ioremap(mem.start, mem.end - mem.start);
}
if (!timer->io_base)
@@ -292,32 +283,37 @@ static int __init omap_dm_timer_init_one(struct omap_dm_timer *timer,
if (IS_ERR(timer->fclk))
return -ENODEV;
- omap_hwmod_enable(oh);
-
/* FIXME: Need to remove hard-coded test on timer ID */
if (gptimer_id != 12) {
struct clk *src;
src = clk_get(NULL, fck_source);
if (IS_ERR(src)) {
- res = -EINVAL;
+ r = -EINVAL;
} else {
- res = __omap_dm_timer_set_source(timer->fclk, src);
- if (IS_ERR_VALUE(res))
+ r = clk_set_parent(timer->fclk, src);
+ if (IS_ERR_VALUE(r))
pr_warn("%s: %s cannot set source\n",
__func__, oh->name);
clk_put(src);
}
}
+
+ omap_hwmod_setup_one(oh_name);
+ omap_hwmod_enable(oh);
__omap_dm_timer_init_regs(timer);
- __omap_dm_timer_reset(timer, 1, 1);
- timer->posted = 1;
- timer->rate = clk_get_rate(timer->fclk);
+ if (posted)
+ __omap_dm_timer_enable_posted(timer);
+
+ /* Check that the intended posted configuration matches the actual */
+ if (posted != timer->posted)
+ return -EINVAL;
+ timer->rate = clk_get_rate(timer->fclk);
timer->reserved = 1;
- return res;
+ return r;
}
static void __init omap2_gp_clockevent_init(int gptimer_id,
@@ -326,7 +322,17 @@ static void __init omap2_gp_clockevent_init(int gptimer_id,
{
int res;
- res = omap_dm_timer_init_one(&clkev, gptimer_id, fck_source, property);
+ clkev.errata = omap_dm_timer_get_errata();
+
+ /*
+ * For clock-event timers we never read the timer counter and
+ * so we are not impacted by errata i103 and i767. Therefore,
+ * we can safely ignore this errata for clock-event timers.
+ */
+ __omap_dm_timer_override_errata(&clkev, OMAP_TIMER_ERRATA_I103_I767);
+
+ res = omap_dm_timer_init_one(&clkev, gptimer_id, fck_source, property,
+ OMAP_TIMER_POSTED);
BUG_ON(res);
omap2_gp_timer_irq.dev_id = &clkev;
@@ -359,7 +365,8 @@ static bool use_gptimer_clksrc;
*/
static cycle_t clocksource_read_cycles(struct clocksource *cs)
{
- return (cycle_t)__omap_dm_timer_read_counter(&clksrc, 1);
+ return (cycle_t)__omap_dm_timer_read_counter(&clksrc,
+ OMAP_TIMER_NONPOSTED);
}
static struct clocksource clocksource_gpt = {
@@ -373,12 +380,17 @@ static struct clocksource clocksource_gpt = {
static u32 notrace dmtimer_read_sched_clock(void)
{
if (clksrc.reserved)
- return __omap_dm_timer_read_counter(&clksrc, 1);
+ return __omap_dm_timer_read_counter(&clksrc,
+ OMAP_TIMER_NONPOSTED);
return 0;
}
-#ifdef CONFIG_OMAP_32K_TIMER
+static struct of_device_id omap_counter_match[] __initdata = {
+ { .compatible = "ti,omap-counter32k", },
+ { }
+};
+
/* Setup free-running counter for clocksource */
static int __init omap2_sync32k_clocksource_init(void)
{
@@ -439,23 +451,21 @@ static int __init omap2_sync32k_clocksource_init(void)
return ret;
}
-#else
-static inline int omap2_sync32k_clocksource_init(void)
-{
- return -ENODEV;
-}
-#endif
static void __init omap2_gptimer_clocksource_init(int gptimer_id,
const char *fck_source)
{
int res;
- res = omap_dm_timer_init_one(&clksrc, gptimer_id, fck_source, NULL);
+ clksrc.errata = omap_dm_timer_get_errata();
+
+ res = omap_dm_timer_init_one(&clksrc, gptimer_id, fck_source, NULL,
+ OMAP_TIMER_NONPOSTED);
BUG_ON(res);
__omap_dm_timer_load_start(&clksrc,
- OMAP_TIMER_CTRL_ST | OMAP_TIMER_CTRL_AR, 0, 1);
+ OMAP_TIMER_CTRL_ST | OMAP_TIMER_CTRL_AR, 0,
+ OMAP_TIMER_NONPOSTED);
setup_sched_clock(dmtimer_read_sched_clock, 32, clksrc.rate);
if (clocksource_register_hz(&clocksource_gpt, clksrc.rate))
@@ -466,25 +476,6 @@ static void __init omap2_gptimer_clocksource_init(int gptimer_id,
gptimer_id, clksrc.rate);
}
-static void __init omap2_clocksource_init(int gptimer_id,
- const char *fck_source)
-{
- /*
- * First give preference to kernel parameter configuration
- * by user (clocksource="gp_timer").
- *
- * In case of missing kernel parameter for clocksource,
- * first check for availability for 32k-sync timer, in case
- * of failure in finding 32k_counter module or registering
- * it as clocksource, execution will fallback to gp-timer.
- */
- if (use_gptimer_clksrc == true)
- omap2_gptimer_clocksource_init(gptimer_id, fck_source);
- else if (omap2_sync32k_clocksource_init())
- /* Fall back to gp-timer code */
- omap2_gptimer_clocksource_init(gptimer_id, fck_source);
-}
-
#ifdef CONFIG_SOC_HAS_REALTIME_COUNTER
/*
* The realtime counter also called master counter, is a free-running
@@ -563,52 +554,65 @@ static inline void __init realtime_counter_init(void)
{}
#endif
-#define OMAP_SYS_TIMER_INIT(name, clkev_nr, clkev_src, clkev_prop, \
+#define OMAP_SYS_GP_TIMER_INIT(name, clkev_nr, clkev_src, clkev_prop, \
+ clksrc_nr, clksrc_src) \
+static void __init omap##name##_gptimer_timer_init(void) \
+{ \
+ omap_dmtimer_init(); \
+ omap2_gp_clockevent_init((clkev_nr), clkev_src, clkev_prop); \
+ omap2_gptimer_clocksource_init((clksrc_nr), clksrc_src); \
+}
+
+#define OMAP_SYS_32K_TIMER_INIT(name, clkev_nr, clkev_src, clkev_prop, \
clksrc_nr, clksrc_src) \
-static void __init omap##name##_timer_init(void) \
+static void __init omap##name##_sync32k_timer_init(void) \
{ \
omap_dmtimer_init(); \
omap2_gp_clockevent_init((clkev_nr), clkev_src, clkev_prop); \
- omap2_clocksource_init((clksrc_nr), clksrc_src); \
+ /* Enable the use of clocksource="gp_timer" kernel parameter */ \
+ if (use_gptimer_clksrc) \
+ omap2_gptimer_clocksource_init((clksrc_nr), clksrc_src);\
+ else \
+ omap2_sync32k_clocksource_init(); \
}
-#define OMAP_SYS_TIMER(name) \
+#define OMAP_SYS_TIMER(name, clksrc) \
struct sys_timer omap##name##_timer = { \
- .init = omap##name##_timer_init, \
+ .init = omap##name##_##clksrc##_timer_init, \
};
#ifdef CONFIG_ARCH_OMAP2
-OMAP_SYS_TIMER_INIT(2, 1, OMAP2_CLKEV_SOURCE, "ti,timer-alwon",
- 2, OMAP2_MPU_SOURCE)
-OMAP_SYS_TIMER(2)
-#endif
+OMAP_SYS_32K_TIMER_INIT(2, 1, OMAP2_32K_SOURCE, "ti,timer-alwon",
+ 2, OMAP2_MPU_SOURCE);
+OMAP_SYS_TIMER(2, sync32k);
+#endif /* CONFIG_ARCH_OMAP2 */
#ifdef CONFIG_ARCH_OMAP3
-OMAP_SYS_TIMER_INIT(3, 1, OMAP3_CLKEV_SOURCE, "ti,timer-alwon",
- 2, OMAP3_MPU_SOURCE)
-OMAP_SYS_TIMER(3)
-OMAP_SYS_TIMER_INIT(3_secure, OMAP3_SECURE_TIMER, OMAP3_CLKEV_SOURCE,
- TIMER_PROP_SECURE, 2, OMAP3_MPU_SOURCE)
-OMAP_SYS_TIMER(3_secure)
-#endif
+OMAP_SYS_32K_TIMER_INIT(3, 1, OMAP3_32K_SOURCE, "ti,timer-alwon",
+ 2, OMAP3_MPU_SOURCE);
+OMAP_SYS_TIMER(3, sync32k);
+OMAP_SYS_32K_TIMER_INIT(3_secure, 12, OMAP3_32K_SOURCE, "ti,timer-secure",
+ 2, OMAP3_MPU_SOURCE);
+OMAP_SYS_TIMER(3_secure, sync32k);
+OMAP_SYS_GP_TIMER_INIT(3_gp, 1, OMAP3_MPU_SOURCE, "ti,timer-alwon",
+ 2, OMAP3_MPU_SOURCE);
+OMAP_SYS_TIMER(3_gp, gptimer);
+#endif /* CONFIG_ARCH_OMAP3 */
#ifdef CONFIG_SOC_AM33XX
-OMAP_SYS_TIMER_INIT(3_am33xx, 1, OMAP4_MPU_SOURCE, "ti,timer-alwon",
- 2, OMAP4_MPU_SOURCE)
-OMAP_SYS_TIMER(3_am33xx)
-#endif
+OMAP_SYS_GP_TIMER_INIT(3_am33xx, 1, OMAP4_MPU_SOURCE, "ti,timer-alwon",
+ 2, OMAP4_MPU_SOURCE);
+OMAP_SYS_TIMER(3_am33xx, gptimer);
+#endif /* CONFIG_SOC_AM33XX */
#ifdef CONFIG_ARCH_OMAP4
+OMAP_SYS_32K_TIMER_INIT(4, 1, OMAP4_32K_SOURCE, "ti,timer-alwon",
+ 2, OMAP4_MPU_SOURCE);
#ifdef CONFIG_LOCAL_TIMERS
-static DEFINE_TWD_LOCAL_TIMER(twd_local_timer,
- OMAP44XX_LOCAL_TWD_BASE, 29);
-#endif
-
-static void __init omap4_timer_init(void)
+static DEFINE_TWD_LOCAL_TIMER(twd_local_timer, OMAP44XX_LOCAL_TWD_BASE, 29);
+static void __init omap4_local_timer_init(void)
{
- omap2_gp_clockevent_init(1, OMAP4_CLKEV_SOURCE, "ti,timer-alwon");
- omap2_clocksource_init(2, OMAP4_MPU_SOURCE);
-#ifdef CONFIG_LOCAL_TIMERS
+ omap4_sync32k_timer_init();
/* Local timers are not supprted on OMAP4430 ES1.0 */
if (omap_rev() != OMAP4430_REV_ES1_0) {
int err;
@@ -622,26 +626,32 @@ static void __init omap4_timer_init(void)
if (err)
pr_err("twd_local_timer_register failed %d\n", err);
}
-#endif
}
-OMAP_SYS_TIMER(4)
-#endif
+#else /* CONFIG_LOCAL_TIMERS */
+static inline void omap4_local_timer_init(void)
+{
+ omap4_sync32_timer_init();
+}
+#endif /* CONFIG_LOCAL_TIMERS */
+OMAP_SYS_TIMER(4, local);
+#endif /* CONFIG_ARCH_OMAP4 */
#ifdef CONFIG_SOC_OMAP5
-static void __init omap5_timer_init(void)
+OMAP_SYS_32K_TIMER_INIT(5, 1, OMAP4_32K_SOURCE, "ti,timer-alwon",
+ 2, OMAP4_MPU_SOURCE);
+static void __init omap5_realtime_timer_init(void)
{
int err;
- omap2_gp_clockevent_init(1, OMAP4_CLKEV_SOURCE, "ti,timer-alwon");
- omap2_clocksource_init(2, OMAP4_MPU_SOURCE);
+ omap5_sync32k_timer_init();
realtime_counter_init();
err = arch_timer_of_register();
if (err)
pr_err("%s: arch_timer_register failed %d\n", __func__, err);
}
-OMAP_SYS_TIMER(5)
-#endif
+OMAP_SYS_TIMER(5, realtime);
+#endif /* CONFIG_SOC_OMAP5 */
/**
* omap_timer_init - build and register timer device with an
@@ -693,6 +703,7 @@ static int __init omap_timer_init(struct omap_hwmod *oh, void *unused)
if (timer_dev_attr)
pdata->timer_capability = timer_dev_attr->timer_capability;
+ pdata->timer_errata = omap_dm_timer_get_errata();
pdata->get_context_loss_count = omap_pm_get_dev_context_loss_count;
pdev = omap_device_build(name, id, oh, pdata, sizeof(*pdata),
generated by cgit v1.2.3 (git 2.46.0) at 2025-09-06 12:08:59 +0000