diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c
index 60d43c8..d1c7771 100644
--- a/arch/arm/mach-omap2/timer.c
+++ b/arch/arm/mach-omap2/timer.c
@@ -58,16 +58,20 @@
#define OMAP3_32K_SOURCE "omap_32k_fck"
#define OMAP4_32K_SOURCE "sys_32k_ck"
+#define TIMER_PROP_ALWON "ti,timer-alwon"
+
#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 TIMER_PROP_ALWON
#endif
/* Clockevent code */
@@ -171,20 +175,63 @@ void __init omap_dmtimer_init(void)
}
}
+/**
+ * omap_dmtimer_find_by_property - find timer in device-tree by property
+ *
+ * Helper function for finding a timer to be used as kernel system timer
+ * using device-tree. Optionally, the property argument can be used to
+ * select a timer with a specific property. Once a timer is found then
+ * mark the timer node in device-tree as disabled to prevent the kernel
+ * from registering this timer and so no other device can use it.
+ */
+static const char * __init omap_dmtimer_find_by_property(const char *property)
+{
+ struct device_node *np;
+ const char *oh_name;
+
+ for_each_matching_node(np, omap_timer_match) {
+ if (!of_device_is_available(np))
+ continue;
+
+ if (property && !of_get_property(np, property, NULL))
+ continue;
+
+ of_property_read_string_index(np, "ti,hwmods", 0, &oh_name);
+ if (oh_name) {
+ prom_add_property(np, &timer_disabled);
+ return oh_name;
+ }
+ }
+
+ return NULL;
+}
+
static int __init omap_dm_timer_init_one(struct omap_dm_timer *timer,
int gptimer_id,
- const char *fck_source)
+ const char *fck_source,
+ const char *property)
{
char name[10]; /* 10 = sizeof("gptXX_Xck0") */
+ const char *oh_name;
struct omap_hwmod *oh;
struct resource irq_rsrc, mem_rsrc;
size_t size;
int res = 0;
int r;
- sprintf(name, "timer%d", gptimer_id);
- omap_hwmod_setup_one(name);
- oh = omap_hwmod_lookup(name);
+ oh_name = name;
+
+ if (of_have_populated_dt())
+ oh_name = omap_dmtimer_find_by_property(property);
+ else
+ sprintf(name, "timer%d", gptimer_id);
+
+ if (!oh_name)
+ return -ENODEV;
+
+ omap_hwmod_setup_one(oh_name);
+ oh = omap_hwmod_lookup(oh_name);
+
if (!oh)
return -ENODEV;
@@ -211,9 +258,11 @@ static int __init omap_dm_timer_init_one(struct omap_dm_timer *timer,
omap_hwmod_enable(oh);
- if (omap_dm_timer_reserve_systimer(gptimer_id))
- return -ENODEV;
+ if (!of_have_populated_dt())
+ if (omap_dm_timer_reserve_systimer(gptimer_id))
+ return -ENODEV;
+ /* FIXME: Need to remove hard-coded test on timer ID */
if (gptimer_id != 12) {
struct clk *src;
@@ -223,8 +272,8 @@ static int __init omap_dm_timer_init_one(struct omap_dm_timer *timer,
} 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);
+ pr_warn("%s: %s cannot set source\n",
+ __func__, oh->name);
clk_put(src);
}
}@@ -240,11 +289,12 @@ static int __init omap_dm_timer_init_one(struct omap_dm_timer *timer,
}
static void __init omap2_gp_clockevent_init(int gptimer_id,
- const char *fck_source)
+ const char *fck_source,
+ const char *property)
{
int res;
- res = omap_dm_timer_init_one(&clkev, gptimer_id, fck_source);
+ res = omap_dm_timer_init_one(&clkev, gptimer_id, fck_source, property);
BUG_ON(res);
omap2_gp_timer_irq.dev_id = (void *)&clkev;@@ -341,7 +391,7 @@ static void __init omap2_gptimer_clocksource_init(int gptimer_id,
{
int res;
- res = omap_dm_timer_init_one(&clksrc, gptimer_id, fck_source);
+ res = omap_dm_timer_init_one(&clksrc, gptimer_id, fck_source, NULL);
BUG_ON(res);
__omap_dm_timer_load_start(&clksrc,@@ -375,11 +425,11 @@ static void __init omap2_clocksource_init(int gptimer_id,
omap2_gptimer_clocksource_init(gptimer_id, fck_source);
}
-#define OMAP_SYS_TIMER_INIT(name, clkev_nr, clkev_src, \
+#define OMAP_SYS_TIMER_INIT(name, clkev_nr, clkev_src, clkev_prop, \
clksrc_nr, clksrc_src) \
static void __init omap##name##_timer_init(void) \
{ \
- omap2_gp_clockevent_init((clkev_nr), clkev_src); \
+ omap2_gp_clockevent_init((clkev_nr), clkev_src, clkev_prop); \
omap2_clocksource_init((clksrc_nr), clksrc_src); \
}
@@ -389,20 +439,23 @@ struct sys_timer omap##name##_timer = { \
};
#ifdef CONFIG_ARCH_OMAP2
-OMAP_SYS_TIMER_INIT(2, 1, OMAP2_CLKEV_SOURCE, 2, OMAP2_MPU_SOURCE)
+OMAP_SYS_TIMER_INIT(2, 1, OMAP2_CLKEV_SOURCE, TIMER_PROP_ALWON,
+ 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_INIT(3, 1, OMAP3_CLKEV_SOURCE, TIMER_PROP_ALWON,
+ 2, OMAP3_MPU_SOURCE)
OMAP_SYS_TIMER(3)
OMAP_SYS_TIMER_INIT(3_secure, OMAP3_SECURE_TIMER, OMAP3_CLKEV_SOURCE,
- 2, OMAP3_MPU_SOURCE)
+ TIMER_PROP_SECURE, 2, OMAP3_MPU_SOURCE)
OMAP_SYS_TIMER(3_secure)
#endif
#ifdef CONFIG_SOC_AM33XX
-OMAP_SYS_TIMER_INIT(3_am33xx, 1, OMAP4_MPU_SOURCE, 2, OMAP4_MPU_SOURCE)
+OMAP_SYS_TIMER_INIT(3_am33xx, 1, OMAP4_MPU_SOURCE, TIMER_PROP_ALWON,
+ 2, OMAP4_MPU_SOURCE)
OMAP_SYS_TIMER(3_am33xx)
#endif
@@ -415,7 +468,7 @@ static DEFINE_TWD_LOCAL_TIMER(twd_local_timer,
static void __init omap4_timer_init(void)
{
- omap2_gp_clockevent_init(1, OMAP4_CLKEV_SOURCE);
+ omap2_gp_clockevent_init(1, OMAP4_CLKEV_SOURCE, TIMER_PROP_ALWON);
omap2_clocksource_init(2, OMAP4_MPU_SOURCE);
#ifdef CONFIG_LOCAL_TIMERS
/* Local timers are not supprted on OMAP4430 ES1.0 */@@ -437,7 +490,8 @@ OMAP_SYS_TIMER(4)
#endif
#ifdef CONFIG_SOC_OMAP5
-OMAP_SYS_TIMER_INIT(5, 1, OMAP4_CLKEV_SOURCE, 2, OMAP4_MPU_SOURCE)
+OMAP_SYS_TIMER_INIT(5, 1, OMAP4_CLKEV_SOURCE, TIMER_PROP_ALWON,
+ 2, OMAP4_MPU_SOURCE)
OMAP_SYS_TIMER(5)
#endif
@@ -515,6 +569,10 @@ static int __init omap2_dm_timer_init(void)
{
int ret;
+ /* If dtb is there, the devices will be created dynamically */
+ if (of_have_populated_dt())
+ return -ENODEV;
+
ret = omap_hwmod_for_each_by_class("timer", omap_timer_init, NULL);
if (unlikely(ret)) {
pr_err("%s: device registration failed.\n", __func__);diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index 061a0b9..9a4482f 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -40,6 +40,8 @@
#include <linux/device.h>
#include <linux/err.h>
#include <linux/pm_runtime.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
#include <plat/dmtimer.h>
#include <plat/omap-pm.h>
@@ -212,6 +214,13 @@ struct omap_dm_timer *omap_dm_timer_request_specific(int id)
unsigned long flags;
int ret = 0;
+ /* Requesting timer by ID is not supported when device tree is used */
+ if (of_have_populated_dt()) {
+ pr_warn("%s: Please use omap_dm_timer_request_by_cap()\n",
+ __func__);
+ return NULL;
+ }
+
spin_lock_irqsave(&dm_timer_lock, flags);
list_for_each_entry(t, &omap_timer_list, node) {
if (t->pdev->id == id && !t->reserved) {@@ -467,7 +476,7 @@ int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)
* use the clock framework to set the parent clock. To be removed
* once OMAP1 migrated to using clock framework for dmtimers
*/
- if (pdata->set_timer_src)
+ if (pdata && pdata->set_timer_src)
return pdata->set_timer_src(timer->pdev, source);
fclk = clk_get(&timer->pdev->dev, "fck");
@@ -748,7 +757,7 @@ static int __devinit omap_dm_timer_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct dmtimer_platform_data *pdata = pdev->dev.platform_data;
- if (!pdata) {
+ if (!pdata && !dev->of_node) {
dev_err(dev, "%s: no platform data.\n", __func__);
return -ENODEV;
}@@ -777,11 +786,23 @@ static int __devinit omap_dm_timer_probe(struct platform_device *pdev)
return -ENOMEM;
}
- timer->id = pdev->id;
+ if (dev->of_node) {
+ if (of_find_property(dev->of_node, "ti,timer-alwon", NULL))
+ timer->capability |= OMAP_TIMER_ALWON;
+ if (of_find_property(dev->of_node, "ti,timer-dsp", NULL))
+ timer->capability |= OMAP_TIMER_HAS_DSP_IRQ;
+ if (of_find_property(dev->of_node, "ti,timer-pwm", NULL))
+ timer->capability |= OMAP_TIMER_HAS_PWM;
+ if (of_find_property(dev->of_node, "ti,timer-secure", NULL))
+ timer->capability |= OMAP_TIMER_SECURE;
+ } else {
+ timer->id = pdev->id;
+ timer->capability = pdata->timer_capability;
+ timer->reserved = omap_dm_timer_reserved_systimer(timer->id);
+ }
+
timer->irq = irq->start;
- timer->reserved = omap_dm_timer_reserved_systimer(timer->id);
timer->pdev = pdev;
- timer->capability = pdata->timer_capability;
/* Skip pm_runtime_enable for OMAP1 */
if (!(timer->capability & OMAP_TIMER_NEEDS_RESET)) {@@ -821,7 +842,8 @@ static int __devexit omap_dm_timer_remove(struct platform_device *pdev)
spin_lock_irqsave(&dm_timer_lock, flags);
list_for_each_entry(timer, &omap_timer_list, node)
- if (timer->pdev->id == pdev->id) {
+ if (!strcmp(dev_name(&timer->pdev->dev),
+ dev_name(&pdev->dev))) {
list_del(&timer->node);
ret = 0;
break;@@ -831,11 +853,18 @@ static int __devexit omap_dm_timer_remove(struct platform_device *pdev)
return ret;
}
+static const struct of_device_id omap_timer_match[] = {
+ { .compatible = "ti,omap2-timer", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, omap_timer_match);
+
static struct platform_driver omap_dm_timer_driver = {
.probe = omap_dm_timer_probe,
.remove = __devexit_p(omap_dm_timer_remove),
.driver = {
.name = "omap_timer",
+ .of_match_table = of_match_ptr(omap_timer_match),
},
};
--
1.7.9.5