static LIST_HEAD(omap_timer_list);
static DEFINE_SPINLOCK(dm_timer_lock);
+enum {
+ REQUEST_ANY = 0,
+ REQUEST_BY_ID,
+ REQUEST_BY_CAP,
+ REQUEST_BY_NODE,
+};
+
/**
* omap_dm_timer_read_reg - read timer registers in posted and non-posted mode
* @timer: timer pointer over which read operation to perform
return 0;
}
-struct omap_dm_timer *omap_dm_timer_request(void)
+static struct omap_dm_timer *_omap_dm_timer_request(int req_type, void *data)
{
struct omap_dm_timer *timer = NULL, *t;
+ struct device_node *np = NULL;
unsigned long flags;
- int ret = 0;
+ u32 cap = 0;
+ int id = 0;
+
+ switch (req_type) {
+ case REQUEST_BY_ID:
+ id = *(int *)data;
+ break;
+ case REQUEST_BY_CAP:
+ cap = *(u32 *)data;
+ break;
+ case REQUEST_BY_NODE:
+ np = (struct device_node *)data;
+ break;
+ default:
+ /* REQUEST_ANY */
+ break;
+ }
spin_lock_irqsave(&dm_timer_lock, flags);
list_for_each_entry(t, &omap_timer_list, node) {
if (t->reserved)
continue;
- timer = t;
- timer->reserved = 1;
- break;
+ switch (req_type) {
+ case REQUEST_BY_ID:
+ if (id == t->pdev->id) {
+ timer = t;
+ timer->reserved = 1;
+ goto found;
+ }
+ break;
+ case REQUEST_BY_CAP:
+ if (cap == (t->capability & cap)) {
+ /*
+ * If timer is not NULL, we have already found
+ * one timer but it was not an exact match
+ * because it had more capabilites that what
+ * was required. Therefore, unreserve the last
+ * timer found and see if this one is a better
+ * match.
+ */
+ if (timer)
+ timer->reserved = 0;
+ timer = t;
+ timer->reserved = 1;
+
+ /* Exit loop early if we find an exact match */
+ if (t->capability == cap)
+ goto found;
+ }
+ break;
+ case REQUEST_BY_NODE:
+ if (np == t->pdev->dev.of_node) {
+ timer = t;
+ timer->reserved = 1;
+ goto found;
+ }
+ break;
+ default:
+ /* REQUEST_ANY */
+ timer = t;
+ timer->reserved = 1;
+ goto found;
+ }
}
+found:
spin_unlock_irqrestore(&dm_timer_lock, flags);
- if (timer) {
- ret = omap_dm_timer_prepare(timer);
- if (ret) {
- timer->reserved = 0;
- timer = NULL;
- }
+ if (timer && omap_dm_timer_prepare(timer)) {
+ timer->reserved = 0;
+ timer = NULL;
}
if (!timer)
return timer;
}
+
+struct omap_dm_timer *omap_dm_timer_request(void)
+{
+ return _omap_dm_timer_request(REQUEST_ANY, NULL);
+}
EXPORT_SYMBOL_GPL(omap_dm_timer_request);
struct omap_dm_timer *omap_dm_timer_request_specific(int id)
{
- struct omap_dm_timer *timer = NULL, *t;
- 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",
+ pr_warn("%s: Please use omap_dm_timer_request_by_cap/node()\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) {
- timer = t;
- timer->reserved = 1;
- break;
- }
- }
- spin_unlock_irqrestore(&dm_timer_lock, flags);
-
- if (timer) {
- ret = omap_dm_timer_prepare(timer);
- if (ret) {
- timer->reserved = 0;
- timer = NULL;
- }
- }
-
- if (!timer)
- pr_debug("%s: timer%d request failed!\n", __func__, id);
-
- return timer;
+ return _omap_dm_timer_request(REQUEST_BY_ID, &id);
}
EXPORT_SYMBOL_GPL(omap_dm_timer_request_specific);
*/
struct omap_dm_timer *omap_dm_timer_request_by_cap(u32 cap)
{
- struct omap_dm_timer *timer = NULL, *t;
- unsigned long flags;
+ return _omap_dm_timer_request(REQUEST_BY_CAP, &cap);
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_request_by_cap);
- if (!cap)
+/**
+ * omap_dm_timer_request_by_node - Request a timer by device-tree node
+ * @np: Pointer to device-tree timer node
+ *
+ * Request a timer based upon a device node pointer. Returns pointer to
+ * timer handle on success and a NULL pointer on failure.
+ */
+struct omap_dm_timer *omap_dm_timer_request_by_node(struct device_node *np)
+{
+ if (!np)
return NULL;
- spin_lock_irqsave(&dm_timer_lock, flags);
- list_for_each_entry(t, &omap_timer_list, node) {
- if ((!t->reserved) && ((t->capability & cap) == cap)) {
- /*
- * If timer is not NULL, we have already found one timer
- * but it was not an exact match because it had more
- * capabilites that what was required. Therefore,
- * unreserve the last timer found and see if this one
- * is a better match.
- */
- if (timer)
- timer->reserved = 0;
-
- timer = t;
- timer->reserved = 1;
-
- /* Exit loop early if we find an exact match */
- if (t->capability == cap)
- break;
- }
- }
- spin_unlock_irqrestore(&dm_timer_lock, flags);
-
- if (timer && omap_dm_timer_prepare(timer)) {
- timer->reserved = 0;
- timer = NULL;
- }
-
- if (!timer)
- pr_debug("%s: timer request failed!\n", __func__);
-
- return timer;
+ return _omap_dm_timer_request(REQUEST_BY_NODE, np);
}
-EXPORT_SYMBOL_GPL(omap_dm_timer_request_by_cap);
+EXPORT_SYMBOL_GPL(omap_dm_timer_request_by_node);
int omap_dm_timer_free(struct omap_dm_timer *timer)
{
void omap_dm_timer_enable(struct omap_dm_timer *timer)
{
+ int c;
+
pm_runtime_get_sync(&timer->pdev->dev);
+
+ if (!(timer->capability & OMAP_TIMER_ALWON)) {
+ if (timer->get_context_loss_count) {
+ c = timer->get_context_loss_count(&timer->pdev->dev);
+ if (c != timer->ctx_loss_count) {
+ omap_timer_restore_context(timer);
+ timer->ctx_loss_count = c;
+ }
+ } else {
+ omap_timer_restore_context(timer);
+ }
+ }
}
EXPORT_SYMBOL_GPL(omap_dm_timer_enable);
omap_dm_timer_enable(timer);
- if (!(timer->capability & OMAP_TIMER_ALWON)) {
- if (timer->get_context_loss_count &&
- timer->get_context_loss_count(&timer->pdev->dev) !=
- timer->ctx_loss_count)
- omap_timer_restore_context(timer);
- }
-
l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
if (!(l & OMAP_TIMER_CTRL_ST)) {
l |= OMAP_TIMER_CTRL_ST;
__omap_dm_timer_stop(timer, timer->posted, rate);
- if (!(timer->capability & OMAP_TIMER_ALWON)) {
- if (timer->get_context_loss_count)
- timer->ctx_loss_count =
- timer->get_context_loss_count(&timer->pdev->dev);
- }
-
/*
* Since the register values are computed and written within
* __omap_dm_timer_stop, we need to use read to retrieve the
omap_dm_timer_enable(timer);
- if (!(timer->capability & OMAP_TIMER_ALWON)) {
- if (timer->get_context_loss_count &&
- timer->get_context_loss_count(&timer->pdev->dev) !=
- timer->ctx_loss_count)
- omap_timer_restore_context(timer);
- }
-
l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
if (autoreload) {
l |= OMAP_TIMER_CTRL_AR;
}
EXPORT_SYMBOL_GPL(omap_dm_timers_active);
+static const struct of_device_id omap_timer_match[];
+
/**
* omap_dm_timer_probe - probe function called for every registered device
* @pdev: pointer to current timer platform device
struct omap_dm_timer *timer;
struct resource *mem, *irq;
struct device *dev = &pdev->dev;
- struct dmtimer_platform_data *pdata = pdev->dev.platform_data;
+ const struct of_device_id *match;
+ const struct dmtimer_platform_data *pdata;
+
+ match = of_match_device(of_match_ptr(omap_timer_match), dev);
+ pdata = match ? match->data : dev->platform_data;
if (!pdata && !dev->of_node) {
dev_err(dev, "%s: no platform data.\n", __func__);
timer->capability |= OMAP_TIMER_SECURE;
} else {
timer->id = pdev->id;
- timer->errata = pdata->timer_errata;
timer->capability = pdata->timer_capability;
timer->reserved = omap_dm_timer_reserved_systimer(timer->id);
timer->get_context_loss_count = pdata->get_context_loss_count;
}
+ if (pdata)
+ timer->errata = pdata->timer_errata;
+
timer->irq = irq->start;
timer->pdev = pdev;
return ret;
}
+static const struct dmtimer_platform_data omap3plus_pdata = {
+ .timer_errata = OMAP_TIMER_ERRATA_I103_I767,
+};
+
static const struct of_device_id omap_timer_match[] = {
- { .compatible = "ti,omap2-timer", },
+ {
+ .compatible = "ti,omap2420-timer",
+ },
+ {
+ .compatible = "ti,omap3430-timer",
+ .data = &omap3plus_pdata,
+ },
+ {
+ .compatible = "ti,omap4430-timer",
+ .data = &omap3plus_pdata,
+ },
+ {
+ .compatible = "ti,omap5430-timer",
+ .data = &omap3plus_pdata,
+ },
+ {
+ .compatible = "ti,am335x-timer",
+ .data = &omap3plus_pdata,
+ },
+ {
+ .compatible = "ti,am335x-timer-1ms",
+ .data = &omap3plus_pdata,
+ },
{},
};
MODULE_DEVICE_TABLE(of, omap_timer_match);
projects / linux-2.6-block.git / blobdiff