diff --git a/drivers/remoteproc/omap_remoteproc.c b/drivers/remoteproc/omap_remoteproc.c
index 5bccb5840a02546837d29eada857d68a792411d5..aac6158bc286a40729197c7f4f17865a684ca957 100644
--- a/drivers/remoteproc/omap_remoteproc.c
+++ b/drivers/remoteproc/omap_remoteproc.c
@@ -26,6 +26,9 @@
#include <linux/regmap.h>
#include <linux/mfd/syscon.h>
#include <linux/reset.h>
+#include <clocksource/timer-ti-dm.h>
+
+#include <linux/platform_data/dmtimer-omap.h>
#include "omap_remoteproc.h"
#include "remoteproc_internal.h"
@@ -57,6 +60,16 @@ struct omap_rproc_mem {
size_t size;
};
+/**
+ * struct omap_rproc_timer - data structure for a timer used by a omap rproc
+ * @odt: timer pointer
+ * @timer_ops: OMAP dmtimer ops for @odt timer
+ */
+struct omap_rproc_timer {
+ struct omap_dm_timer *odt;
+ const struct omap_dm_timer_ops *timer_ops;
+};
+
/**
* struct omap_rproc - omap remote processor state
* @mbox: mailbox channel handle
@@ -64,6 +77,8 @@ struct omap_rproc_mem {
* @boot_data: boot data structure for setting processor boot address
* @mem: internal memory regions data
* @num_mems: number of internal memory regions
+ * @num_timers: number of rproc timer(s)
+ * @timers: timer(s) info used by rproc
* @rproc: rproc handle
* @reset: reset handle
*/
@@ -73,6 +88,8 @@ struct omap_rproc {
struct omap_rproc_boot_data *boot_data;
struct omap_rproc_mem *mem;
int num_mems;
+ int num_timers;
+ struct omap_rproc_timer *timers;
struct rproc *rproc;
struct reset_control *reset;
};
@@ -97,6 +114,231 @@ struct omap_rproc_dev_data {
const struct omap_rproc_mem_data *mems;
};
+/**
+ * omap_rproc_request_timer() - request a timer for a remoteproc
+ * @dev: device requesting the timer
+ * @np: device node pointer to the desired timer
+ * @timer: handle to a struct omap_rproc_timer to return the timer handle
+ *
+ * This helper function is used primarily to request a timer associated with
+ * a remoteproc. The returned handle is stored in the .odt field of the
+ * @timer structure passed in, and is used to invoke other timer specific
+ * ops (like starting a timer either during device initialization or during
+ * a resume operation, or for stopping/freeing a timer).
+ *
+ * Return: 0 on success, otherwise an appropriate failure
+ */
+static int omap_rproc_request_timer(struct device *dev, struct device_node *np,
+ struct omap_rproc_timer *timer)
+{
+ int ret;
+
+ timer->odt = timer->timer_ops->request_by_node(np);
+ if (!timer->odt) {
+ dev_err(dev, "request for timer node %p failed\n", np);
+ return -EBUSY;
+ }
+
+ ret = timer->timer_ops->set_source(timer->odt, OMAP_TIMER_SRC_SYS_CLK);
+ if (ret) {
+ dev_err(dev, "error setting OMAP_TIMER_SRC_SYS_CLK as source for timer node %p\n",
+ np);
+ timer->timer_ops->free(timer->odt);
+ return ret;
+ }
+
+ /* clean counter, remoteproc code will set the value */
+ timer->timer_ops->set_load(timer->odt, 0, 0);
+
+ return 0;
+}
+
+/**
+ * omap_rproc_start_timer() - start a timer for a remoteproc
+ * @timer: handle to a OMAP rproc timer
+ *
+ * This helper function is used to start a timer associated with a remoteproc,
+ * obtained using the request_timer ops. The helper function needs to be
+ * invoked by the driver to start the timer (during device initialization)
+ * or to just resume the timer.
+ *
+ * Return: 0 on success, otherwise a failure as returned by DMTimer ops
+ */
+static inline int omap_rproc_start_timer(struct omap_rproc_timer *timer)
+{
+ return timer->timer_ops->start(timer->odt);
+}
+
+/**
+ * omap_rproc_stop_timer() - stop a timer for a remoteproc
+ * @timer: handle to a OMAP rproc timer
+ *
+ * This helper function is used to disable a timer associated with a
+ * remoteproc, and needs to be called either during a device shutdown
+ * or suspend operation. The separate helper function allows the driver
+ * to just stop a timer without having to release the timer during a
+ * suspend operation.
+ *
+ * Return: 0 on success, otherwise a failure as returned by DMTimer ops
+ */
+static inline int omap_rproc_stop_timer(struct omap_rproc_timer *timer)
+{
+ return timer->timer_ops->stop(timer->odt);
+}
+
+/**
+ * omap_rproc_release_timer() - release a timer for a remoteproc
+ * @timer: handle to a OMAP rproc timer
+ *
+ * This helper function is used primarily to release a timer associated
+ * with a remoteproc. The dmtimer will be available for other clients to
+ * use once released.
+ *
+ * Return: 0 on success, otherwise a failure as returned by DMTimer ops
+ */
+static inline int omap_rproc_release_timer(struct omap_rproc_timer *timer)
+{
+ return timer->timer_ops->free(timer->odt);
+}
+
+/**
+ * omap_rproc_enable_timers() - enable the timers for a remoteproc
+ * @rproc: handle of a remote processor
+ * @configure: boolean flag used to acquire and configure the timer handle
+ *
+ * This function is used primarily to enable the timers associated with
+ * a remoteproc. The configure flag is provided to allow the driver to
+ * to either acquire and start a timer (during device initialization) or
+ * to just start a timer (during a resume operation).
+ *
+ * Return: 0 on success, otherwise an appropriate failure
+ */
+static int omap_rproc_enable_timers(struct rproc *rproc, bool configure)
+{
+ int i;
+ int ret = 0;
+ struct platform_device *tpdev;
+ struct dmtimer_platform_data *tpdata;
+ const struct omap_dm_timer_ops *timer_ops;
+ struct omap_rproc *oproc = rproc->priv;
+ struct omap_rproc_timer *timers = oproc->timers;
+ struct device *dev = rproc->dev.parent;
+ struct device_node *np = NULL;
+
+ if (!oproc->num_timers)
+ return 0;
+
+ if (!configure)
+ goto start_timers;
+
+ for (i = 0; i < oproc->num_timers; i++) {
+ np = of_parse_phandle(dev->of_node, "ti,timers", i);
+ if (!np) {
+ ret = -ENXIO;
+ dev_err(dev, "device node lookup for timer at index %d failed: %d\n",
+ i, ret);
+ goto free_timers;
+ }
+
+ tpdev = of_find_device_by_node(np);
+ if (!tpdev) {
+ ret = -ENODEV;
+ dev_err(dev, "could not get timer platform device\n");
+ goto put_node;
+ }
+
+ tpdata = dev_get_platdata(&tpdev->dev);
+ put_device(&tpdev->dev);
+ if (!tpdata) {
+ ret = -EINVAL;
+ dev_err(dev, "dmtimer pdata structure NULL\n");
+ goto put_node;
+ }
+
+ timer_ops = tpdata->timer_ops;
+ if (!timer_ops || !timer_ops->request_by_node ||
+ !timer_ops->set_source || !timer_ops->set_load ||
+ !timer_ops->free || !timer_ops->start ||
+ !timer_ops->stop) {
+ ret = -EINVAL;
+ dev_err(dev, "device does not have required timer ops\n");
+ goto put_node;
+ }
+
+ timers[i].timer_ops = timer_ops;
+ ret = omap_rproc_request_timer(dev, np, &timers[i]);
+ if (ret) {
+ dev_err(dev, "request for timer %p failed: %d\n", np,
+ ret);
+ goto put_node;
+ }
+ of_node_put(np);
+ }
+
+start_timers:
+ for (i = 0; i < oproc->num_timers; i++) {
+ ret = omap_rproc_start_timer(&timers[i]);
+ if (ret) {
+ dev_err(dev, "start timer %p failed failed: %d\n", np,
+ ret);
+ break;
+ }
+ }
+ if (ret) {
+ while (i >= 0) {
+ omap_rproc_stop_timer(&timers[i]);
+ i--;
+ }
+ goto put_node;
+ }
+ return 0;
+
+put_node:
+ if (configure)
+ of_node_put(np);
+free_timers:
+ while (i--) {
+ omap_rproc_release_timer(&timers[i]);
+ timers[i].odt = NULL;
+ timers[i].timer_ops = NULL;
+ }
+
+ return ret;
+}
+
+/**
+ * omap_rproc_disable_timers() - disable the timers for a remoteproc
+ * @rproc: handle of a remote processor
+ * @configure: boolean flag used to release the timer handle
+ *
+ * This function is used primarily to disable the timers associated with
+ * a remoteproc. The configure flag is provided to allow the driver to
+ * to either stop and release a timer (during device shutdown) or to just
+ * stop a timer (during a suspend operation).
+ *
+ * Return: 0 on success or no timers
+ */
+static int omap_rproc_disable_timers(struct rproc *rproc, bool configure)
+{
+ int i;
+ struct omap_rproc *oproc = rproc->priv;
+ struct omap_rproc_timer *timers = oproc->timers;
+
+ if (!oproc->num_timers)
+ return 0;
+
+ for (i = 0; i < oproc->num_timers; i++) {
+ omap_rproc_stop_timer(&timers[i]);
+ if (configure) {
+ omap_rproc_release_timer(&timers[i]);
+ timers[i].odt = NULL;
+ timers[i].timer_ops = NULL;
+ }
+ }
+
+ return 0;
+}
+
/**
* omap_rproc_mbox_callback() - inbound mailbox message handler
* @client: mailbox client pointer used for requesting the mailbox channel
@@ -232,14 +474,22 @@ static int omap_rproc_start(struct rproc *rproc)
goto put_mbox;
}
+ ret = omap_rproc_enable_timers(rproc, true);
+ if (ret) {
+ dev_err(dev, "omap_rproc_enable_timers failed: %d\n", ret);
+ goto put_mbox;
+ }
+
ret = reset_control_deassert(oproc->reset);
if (ret) {
dev_err(dev, "reset control deassert failed: %d\n", ret);
- goto put_mbox;
+ goto disable_timers;
}
return 0;
+disable_timers:
+ omap_rproc_disable_timers(rproc, true);
put_mbox:
mbox_free_channel(oproc->mbox);
return ret;
@@ -255,6 +505,10 @@ static int omap_rproc_stop(struct rproc *rproc)
if (ret)
return ret;
+ ret = omap_rproc_disable_timers(rproc, true);
+ if (ret)
+ return ret;
+
mbox_free_channel(oproc->mbox);
return 0;
@@ -482,6 +736,37 @@ static int omap_rproc_of_get_internal_memories(struct platform_device *pdev,
return 0;
}
+static int omap_rproc_of_get_timers(struct platform_device *pdev,
+ struct rproc *rproc)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct omap_rproc *oproc = rproc->priv;
+ struct device *dev = &pdev->dev;
+
+ /*
+ * Timer nodes are directly used in client nodes as phandles, so
+ * retrieve the count using appropriate size
+ */
+ oproc->num_timers = of_count_phandle_with_args(np, "ti,timers", NULL);
+ if (oproc->num_timers <= 0) {
+ dev_dbg(dev, "device does not have timers, status = %d\n",
+ oproc->num_timers);
+ oproc->num_timers = 0;
+ }
+
+ if (oproc->num_timers) {
+ oproc->timers = devm_kcalloc(dev, oproc->num_timers,
+ sizeof(*oproc->timers),
+ GFP_KERNEL);
+ if (!oproc->timers)
+ return -ENOMEM;
+
+ dev_dbg(dev, "device has %d tick timers\n", oproc->num_timers);
+ }
+
+ return 0;
+}
+
static int omap_rproc_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
@@ -529,6 +814,10 @@ static int omap_rproc_probe(struct platform_device *pdev)
if (ret)
goto free_rproc;
+ ret = omap_rproc_of_get_timers(pdev, rproc);
+ if (ret)
+ goto free_rproc;
+
ret = of_reserved_mem_device_init(&pdev->dev);
if (ret) {
dev_warn(&pdev->dev, "device does not have specific CMA pool.\n");