regulator: Add basic trace facilities

[firefly-linux-kernel-4.4.55.git] / drivers / regulator / core.c

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 67d3a61f378580050fcc436efa4c68dc56a20adf..8a5d0ae191b3cbe5c513415ce3697def45755571 100644 (file)
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -25,6 +25,9 @@
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
 
+#define CREATE_TRACE_POINTS
+#include <trace/events/regulator.h>
+
 #include "dummy.h"
 
 #define REGULATOR_VERSION "0.5"
@@ -1310,6 +1313,8 @@ static int _regulator_enable(struct regulator_dev *rdev)
                                delay = 0;
                        }
 
+                       trace_regulator_enable(rdev_get_name(rdev));
+
                        /* Allow the regulator to ramp; it would be useful
                         * to extend this for bulk operations so that the
                         * regulators can ramp together.  */
@@ -1317,6 +1322,8 @@ static int _regulator_enable(struct regulator_dev *rdev)
                        if (ret < 0)
                                return ret;
 
+                       trace_regulator_enable_delay(rdev_get_name(rdev));
+
                        if (delay >= 1000) {
                                mdelay(delay / 1000);
                                udelay(delay % 1000);
@@ -1324,6 +1331,8 @@ static int _regulator_enable(struct regulator_dev *rdev)
                                udelay(delay);
                        }
 
+                       trace_regulator_enable_complete(rdev_get_name(rdev));
+
                } else if (ret < 0) {
                        printk(KERN_ERR "%s: is_enabled() failed for %s: %d\n",
                               __func__, rdev_get_name(rdev), ret);
@@ -1379,6 +1388,8 @@ static int _regulator_disable(struct regulator_dev *rdev,
                /* we are last user */
                if (_regulator_can_change_status(rdev) &&
                    rdev->desc->ops->disable) {
+                       trace_regulator_disable(rdev_get_name(rdev));
+
                        ret = rdev->desc->ops->disable(rdev);
                        if (ret < 0) {
                                printk(KERN_ERR "%s: failed to disable %s\n",
@@ -1386,6 +1397,8 @@ static int _regulator_disable(struct regulator_dev *rdev,
                                return ret;
                        }
 
+                       trace_regulator_disable_complete(rdev_get_name(rdev));
+
                        _notifier_call_chain(rdev, REGULATOR_EVENT_DISABLE,
                                             NULL);
                }
@@ -1645,6 +1658,8 @@ int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV)
        regulator->min_uV = min_uV;
        regulator->max_uV = max_uV;
 
+       trace_regulator_set_voltage(rdev_get_name(rdev), min_uV, max_uV);
+
        ret = rdev->desc->ops->set_voltage(rdev, min_uV, max_uV, &selector);
 
        if (rdev->desc->ops->list_voltage)
@@ -1652,6 +1667,8 @@ int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV)
        else
                selector = -1;
 
+       trace_regulator_set_voltage_complete(rdev_get_name(rdev), selector);
+
 out:
        _notifier_call_chain(rdev, REGULATOR_EVENT_VOLTAGE_CHANGE, NULL);
        mutex_unlock(&rdev->mutex);