Merge "msm: thermal: Update debug/error logs to be more informative"
diff --git a/drivers/thermal/msm_thermal.c b/drivers/thermal/msm_thermal.c
index 81b683d..e5eb9b2 100644
--- a/drivers/thermal/msm_thermal.c
+++ b/drivers/thermal/msm_thermal.c
@@ -11,6 +11,8 @@
  *
  */
 
+#define pr_fmt(fmt) "%s:%s " fmt, KBUILD_MODNAME, __func__
+
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/module.h>
@@ -257,8 +259,8 @@
 
 	switch (event) {
 	case CPUFREQ_INCOMPATIBLE:
-		pr_debug("%s: mitigating cpu %d to freq max: %u min: %u\n",
-		KBUILD_MODNAME, policy->cpu, max_freq_req, min_freq_req);
+		pr_debug("mitigating CPU%d to freq max: %u min: %u\n",
+		policy->cpu, max_freq_req, min_freq_req);
 
 		cpufreq_verify_within_limits(policy, min_freq_req,
 			max_freq_req);
@@ -283,7 +285,7 @@
 
 	table = cpufreq_frequency_get_table(0);
 	if (!table) {
-		pr_debug("%s: error reading cpufreq table\n", __func__);
+		pr_debug("error reading cpufreq table\n");
 		return -EINVAL;
 	}
 	freq_table_get = 1;
@@ -293,9 +295,13 @@
 
 static void update_cpu_freq(int cpu)
 {
+	int ret = 0;
+
 	if (cpu_online(cpu)) {
-		if (cpufreq_update_policy(cpu))
-			pr_err("Unable to update policy for cpu:%d\n", cpu);
+		ret = cpufreq_update_policy(cpu);
+		if (ret)
+			pr_err("Unable to update policy for cpu:%d. err:%d\n",
+				cpu, ret);
 	}
 }
 
@@ -307,13 +313,14 @@
 	if (!freq_table_get) {
 		ret = check_freq_table();
 		if (ret) {
-			pr_err("%s:Fail to get freq table\n", KBUILD_MODNAME);
+			pr_err("Fail to get freq table. err:%d\n", ret);
 			return ret;
 		}
 	}
 	/* If min is larger than allowed max */
 	min = min(min, table[limit_idx_high].frequency);
 
+	pr_debug("Requesting min freq:%u for all CPU's\n", min);
 	if (freq_mitigation_task) {
 		min_freq_limit = min;
 		complete(&freq_mitigation_complete);
@@ -362,7 +369,7 @@
 	int ret = 0;
 
 	if (r->reg == NULL) {
-		pr_info("Do not have regulator handle:%s, can't apply vdd\n",
+		pr_err("%s don't have regulator handle. can't apply vdd\n",
 				r->name);
 		return -EFAULT;
 	}
@@ -375,11 +382,15 @@
 			r->levels[r->num_levels - 1]);
 		if (!ret)
 			r->curr_level = -1;
+		pr_debug("Requested min level for %s. curr level: %d\n",
+				r->name, r->curr_level);
 	} else if (level >= 0 && level < (r->num_levels)) {
 		ret = regulator_set_voltage(r->reg, r->levels[level],
 			r->levels[r->num_levels - 1]);
 		if (!ret)
 			r->curr_level = level;
+		pr_debug("Requesting level %d for %s. curr level: %d\n",
+			r->levels[level], r->name, r->levels[r->curr_level]);
 	} else {
 		pr_err("level input:%d is not within range\n", level);
 		return -EINVAL;
@@ -395,12 +406,13 @@
 	int fail_cnt = 0;
 	int ret = 0;
 
+	pr_debug("Requesting PMIC Mode: %d\n", mode);
 	for (i = 0; i < psm_rails_cnt; i++) {
 		if (psm_rails[i].mode != mode) {
 			ret = rpm_regulator_set_mode(psm_rails[i].reg, mode);
 			if (ret) {
-				pr_err("Cannot set mode:%d for %s",
-					mode, psm_rails[i].name);
+				pr_err("Cannot set mode:%d for %s. err:%d",
+					mode, psm_rails[i].name, ret);
 				fail_cnt++;
 			} else
 				psm_rails[i].mode = mode;
@@ -473,6 +485,8 @@
 		en->enabled = 1;
 	else if (!val && (dis_cnt == rails_cnt))
 		en->enabled = 0;
+	pr_debug("%s vdd restriction. curr: %d\n",
+			(val) ? "Enable" : "Disable", en->enabled);
 
 done_vdd_rstr_en:
 	mutex_unlock(&vdd_rstr_mutex);
@@ -547,12 +561,14 @@
 			ret = vdd_restriction_apply_voltage(reg, val);
 			if (ret) {
 				pr_err( \
-				"Set vdd restriction for regulator %s failed\n",
-				reg->name);
+				"Set vdd restriction for regulator %s failed. err:%d\n",
+				reg->name, ret);
 				goto done_store_level;
 			}
 		}
 		reg->curr_level = val;
+		pr_debug("Request level %d for %s\n",
+				reg->curr_level, reg->name);
 	}
 
 done_store_level:
@@ -668,16 +684,15 @@
 	}
 
 	if ((val != PMIC_PWM_MODE) && (val != PMIC_AUTO_MODE)) {
-		pr_err(" Invalid number %d for mode\n", val);
+		pr_err("Invalid number %d for mode\n", val);
 		goto done_psm_store;
 	}
 
 	if (val != reg->mode) {
 		ret = rpm_regulator_set_mode(reg->reg, val);
 		if (ret) {
-			pr_err( \
-			"Fail to set PMIC SW Mode:%d for %s\n",
-			val, reg->name);
+			pr_err("Fail to set Mode:%d for %s. err:%d\n",
+			val, reg->name, ret);
 			goto done_psm_store;
 		}
 		reg->mode = val;
@@ -701,7 +716,7 @@
 		}
 	}
 	if (!hw_id_found) {
-		pr_err("%s: Invalid sensor hw id :%d\n", __func__, sensor_id);
+		pr_err("Invalid sensor hw id:%d\n", sensor_id);
 		return -EINVAL;
 	}
 
@@ -716,8 +731,7 @@
 	tsens_id_map = kzalloc(sizeof(int) * max_tsens_num,
 			GFP_KERNEL);
 	if (!tsens_id_map) {
-		pr_err("%s: Cannot allocate memory for tsens_id_map\n",
-				__func__);
+		pr_err("Cannot allocate memory for tsens_id_map\n");
 		return -ENOMEM;
 	}
 
@@ -729,9 +743,8 @@
 				tsens_id_map[i] = i;
 				ret = 0;
 			} else {
-				pr_err( \
-				"%s: Failed to get hw id for sw id %d\n",
-				__func__, i);
+				pr_err("Failed to get hw id for id:%d.err:%d\n",
+						i, ret);
 				goto fail;
 			}
 		}
@@ -760,7 +773,9 @@
 			ret = vdd_restriction_apply_voltage(&rails[i],
 					en ? 0 : -1);
 		if (ret) {
-			pr_err("Cannot set voltage for %s", rails[i].name);
+			pr_err("Failed to %s for %s. err:%d",
+					(en) ? "enable" : "disable",
+					rails[i].name, ret);
 			fail_cnt++;
 		} else {
 			if (en)
@@ -792,7 +807,7 @@
 
 	table = cpufreq_frequency_get_table(0);
 	if (table == NULL) {
-		pr_debug("%s: error reading cpufreq table\n", KBUILD_MODNAME);
+		pr_err("error reading cpufreq table\n");
 		ret = -EINVAL;
 		goto fail;
 	}
@@ -814,15 +829,15 @@
 
 	ret = sensor_set_trip(sensor_id, threshold);
 	if (ret != 0) {
-		pr_err("%s: Error in setting trip %d\n",
-			KBUILD_MODNAME, threshold->trip);
+		pr_err("sensor:%u Error in setting trip:%d. err:%d\n",
+			sensor_id, threshold->trip, ret);
 		goto set_done;
 	}
 
 	ret = sensor_activate_trip(sensor_id, threshold, true);
 	if (ret != 0) {
-		pr_err("%s: Error in enabling trip %d\n",
-			KBUILD_MODNAME, threshold->trip);
+		pr_err("sensor:%u Error in enabling trip:%d. err:%d\n",
+			sensor_id, threshold->trip, ret);
 		goto set_done;
 	}
 
@@ -857,7 +872,7 @@
 
 	ret = tsens_get_temp(&tsens_dev, temp);
 	if (ret) {
-		pr_err("Unable to read TSENS sensor %d\n",
+		pr_err("Unable to read TSENS sensor:%d\n",
 			tsens_dev.sensor_num);
 		goto get_temp_exit;
 	}
@@ -873,14 +888,17 @@
 	long temp;
 
 	if ((!threshold) || (zone_id >= max_tsens_num)) {
-		pr_err("%s: Invalid input\n", KBUILD_MODNAME);
+		pr_err("Invalid input\n");
 		ret = -EINVAL;
 		goto set_threshold_exit;
 	}
 
 	ret = therm_get_temp(zone_id, THERM_ZONE_ID, &temp);
-	if (ret)
+	if (ret) {
+		pr_err("Unable to read temperature for zone:%d. err:%d\n",
+			zone_id, ret);
 		goto set_threshold_exit;
+	}
 
 	while (i < MAX_THRESHOLD) {
 		switch (threshold[i].trip) {
@@ -901,6 +919,8 @@
 			}
 			break;
 		default:
+			pr_err("zone:%u Invalid trip:%d\n", zone_id,
+					threshold[i].trip);
 			break;
 		}
 		i++;
@@ -926,12 +946,12 @@
 				continue;
 			if (cpus_offlined & BIT(i) && !cpu_online(i))
 				continue;
-			pr_info("%s: Set Offline: CPU%d Temp: %ld\n",
-					KBUILD_MODNAME, i, temp);
+			pr_info("Set Offline: CPU%d Temp: %ld\n",
+					i, temp);
 			ret = cpu_down(i);
 			if (ret)
-				pr_err("%s: Error %d offline core %d\n",
-					KBUILD_MODNAME, ret, i);
+				pr_err("Error %d offline core %d\n",
+					ret, i);
 			cpus_offlined |= BIT(i);
 			break;
 		}
@@ -942,8 +962,8 @@
 			if (!(cpus_offlined & BIT(i)))
 				continue;
 			cpus_offlined &= ~BIT(i);
-			pr_info("%s: Allow Online CPU%d Temp: %ld\n",
-					KBUILD_MODNAME, i, temp);
+			pr_info("Allow Online CPU%d Temp: %ld\n",
+					i, temp);
 			/*
 			 * If this core is already online, then bring up the
 			 * next offlined core.
@@ -952,8 +972,8 @@
 				continue;
 			ret = cpu_up(i);
 			if (ret)
-				pr_err("%s: Error %d online core %d\n",
-						KBUILD_MODNAME, ret, i);
+				pr_err("Error %d online core %d\n",
+						ret, i);
 			break;
 		}
 	}
@@ -977,8 +997,10 @@
 			continue;
 		ret = cpu_down(cpu);
 		if (ret)
-			pr_err("%s: Unable to offline cpu%d\n",
-				KBUILD_MODNAME, cpu);
+			pr_err("Unable to offline CPU%d. err:%d\n",
+				cpu, ret);
+		else
+			pr_debug("Offlined CPU%d\n", cpu);
 	}
 	return ret;
 }
@@ -988,8 +1010,10 @@
 	int ret = 0;
 	uint32_t cpu = 0, mask = 0;
 
-	if (!core_control_enabled)
+	if (!core_control_enabled) {
+		pr_debug("Core control disabled\n");
 		return -EINVAL;
+	}
 
 	while (!kthread_should_stop()) {
 		while (wait_for_completion_interruptible(
@@ -1056,7 +1080,11 @@
 					ocr_rails[j].init = OPTIMUM_CURRENT_NR;
 			ret = ocr_set_mode_all(OPTIMUM_CURRENT_MAX);
 			if (ret)
-				pr_err("Error setting max optimum current\n");
+				pr_err("Error setting max ocr. err:%d\n",
+					ret);
+			else
+				pr_debug("Requested MAX OCR. tsens:%d Temp:%ld",
+					tsens_id_map[i], temp);
 			goto do_ocr_exit;
 		} else if (temp <= (msm_thermal_info.ocr_temp_degC -
 			msm_thermal_info.ocr_temp_hyst_degC))
@@ -1077,6 +1105,8 @@
 		if (ret) {
 			pr_err("Error setting min optimum current\n");
 			goto do_ocr_exit;
+		} else {
+			pr_debug("Requested MIN OCR. Temp:%ld", temp);
 		}
 	}
 
@@ -1104,8 +1134,8 @@
 	for (i = 0; i < max_tsens_num; i++) {
 		ret = therm_get_temp(tsens_id_map[i], THERM_TSENS_ID, &temp);
 		if (ret) {
-			pr_debug("Unable to read TSENS sensor %d\n",
-				tsens_id_map[i]);
+			pr_err("Unable to read TSENS sensor:%d. err:%d\n",
+				tsens_id_map[i], ret);
 			dis_cnt++;
 			continue;
 		}
@@ -1113,9 +1143,13 @@
 			ret = vdd_restriction_apply_all(1);
 			if (ret) {
 				pr_err( \
-				"Enable vdd rstr votlage for all failed\n");
+				"Enable vdd rstr for all failed. err:%d\n",
+					ret);
 				goto exit;
 			}
+			pr_debug("Enabled Vdd Restriction tsens:%d. Temp:%ld\n",
+			thresh[MSM_VDD_RESTRICTION].thresh_list[i].sensor_id,
+			temp);
 			goto exit;
 		} else if (temp > msm_thermal_info.vdd_rstr_temp_hyst_degC)
 			dis_cnt++;
@@ -1123,9 +1157,11 @@
 	if (dis_cnt == max_tsens_num) {
 		ret = vdd_restriction_apply_all(0);
 		if (ret) {
-			pr_err("Disable vdd rstr votlage for all failed\n");
+			pr_err("Disable vdd rstr for all failed. err:%d\n",
+					ret);
 			goto exit;
 		}
+		pr_debug("Disabled Vdd Restriction\n");
 	}
 exit:
 	mutex_unlock(&vdd_rstr_mutex);
@@ -1143,8 +1179,8 @@
 	for (i = 0; i < max_tsens_num; i++) {
 		ret = therm_get_temp(tsens_id_map[i], THERM_TSENS_ID, &temp);
 		if (ret) {
-			pr_debug("%s: Unable to read TSENS sensor %d\n",
-					__func__, tsens_id_map[i]);
+			pr_err("Unable to read TSENS sensor:%d. err:%d\n",
+					tsens_id_map[i], ret);
 			auto_cnt++;
 			continue;
 		}
@@ -1157,9 +1193,12 @@
 		if (temp >  msm_thermal_info.psm_temp_degC) {
 			ret = psm_set_mode_all(PMIC_PWM_MODE);
 			if (ret) {
-				pr_err("Set pwm mode for all failed\n");
+				pr_err("Set pwm mode for all failed. err:%d\n",
+						ret);
 				goto exit;
 			}
+			pr_debug("Requested PMIC PWM Mode tsens:%d. Temp:%ld\n",
+					tsens_id_map[i], temp);
 			break;
 		} else if (temp <= msm_thermal_info.psm_temp_hyst_degC)
 			auto_cnt++;
@@ -1168,9 +1207,10 @@
 	if (auto_cnt == max_tsens_num) {
 		ret = psm_set_mode_all(PMIC_AUTO_MODE);
 		if (ret) {
-			pr_err("Set auto mode for all failed\n");
+			pr_err("Set auto mode for all failed. err:%d\n", ret);
 			goto exit;
 		}
+		pr_debug("Requested PMIC AUTO Mode\n");
 	}
 
 exit:
@@ -1212,6 +1252,8 @@
 	for_each_possible_cpu(cpu) {
 		if (!(msm_thermal_info.bootup_freq_control_mask & BIT(cpu)))
 			continue;
+		pr_info("Limiting CPU%d max frequency to %u. Temp:%ld\n",
+			cpu, max_freq, temp);
 		cpus[cpu].limited_max_freq = max_freq;
 		update_cpu_freq(cpu);
 	}
@@ -1226,8 +1268,8 @@
 
 	ret = therm_get_temp(msm_thermal_info.sensor_id, THERM_TSENS_ID, &temp);
 	if (ret) {
-		pr_debug("Unable to read TSENS sensor %d\n",
-				msm_thermal_info.sensor_id);
+		pr_err("Unable to read TSENS sensor:%d. err:%d\n",
+				msm_thermal_info.sensor_id, ret);
 		goto reschedule;
 	}
 
@@ -1260,14 +1302,13 @@
 		if (core_control_enabled &&
 			(msm_thermal_info.core_control_mask & BIT(cpu)) &&
 			(cpus_offlined & BIT(cpu))) {
-			pr_debug(
-			"%s: Preventing cpu%d from coming online.\n",
-				KBUILD_MODNAME, cpu);
+			pr_debug("Preventing CPU%d from coming online.\n",
+				cpu);
 			return NOTIFY_BAD;
 		}
 	}
 
-
+	pr_debug("voting for CPU%d to be online\n", cpu);
 	return NOTIFY_OK;
 }
 
@@ -1312,8 +1353,7 @@
 {
 	struct cpu_info *cpu_node = (struct cpu_info *)data;
 
-	pr_info("%s: %s reach temp threshold: %d\n", KBUILD_MODNAME,
-			cpu_node->sensor_type, temp);
+	pr_info("%s reach temp threshold: %d\n", cpu_node->sensor_type, temp);
 
 	if (!(msm_thermal_info.core_control_mask & BIT(cpu_node->cpu)))
 		return 0;
@@ -1333,7 +1373,7 @@
 		cpu_node->hotplug_thresh_clear = true;
 		complete(&hotplug_notify_complete);
 	} else {
-		pr_err("%s: Hotplug task is not initialized\n", KBUILD_MODNAME);
+		pr_err("Hotplug task is not initialized\n");
 	}
 	return 0;
 }
@@ -1352,8 +1392,8 @@
 			continue;
 		if (therm_get_temp(cpus[cpu].sensor_id, cpus[cpu].id_type,
 					&temp)) {
-			pr_err("%s: Unable to read TSENS sensor %d\n",
-				KBUILD_MODNAME, cpus[cpu].sensor_id);
+			pr_err("Unable to read TSENS sensor:%d.\n",
+				cpus[cpu].sensor_id);
 			mutex_unlock(&core_control_mutex);
 			return -EINVAL;
 		}
@@ -1369,8 +1409,7 @@
 	if (hotplug_task)
 		complete(&hotplug_notify_complete);
 	else {
-		pr_err("%s: Hotplug task is not initialized\n",
-					KBUILD_MODNAME);
+		pr_err("Hotplug task is not initialized\n");
 		return -EINVAL;
 	}
 	return 0;
@@ -1410,8 +1449,8 @@
 	init_completion(&hotplug_notify_complete);
 	hotplug_task = kthread_run(do_hotplug, NULL, "msm_thermal:hotplug");
 	if (IS_ERR(hotplug_task)) {
-		pr_err("%s: Failed to create do_hotplug thread\n",
-				KBUILD_MODNAME);
+		pr_err("Failed to create do_hotplug thread. err:%ld\n",
+				PTR_ERR(hotplug_task));
 		return;
 	}
 	/*
@@ -1471,7 +1510,7 @@
 {
 	struct cpu_info *cpu_node = (struct cpu_info *) data;
 
-	pr_debug("%s: %s reached temp threshold: %d\n", KBUILD_MODNAME,
+	pr_debug("%s reached temp threshold: %d\n",
 		cpu_node->sensor_type, temp);
 
 	if (!(msm_thermal_info.freq_mitig_control_mask &
@@ -1481,8 +1520,8 @@
 	switch (type) {
 	case THERMAL_TRIP_CONFIGURABLE_HI:
 		if (!cpu_node->max_freq) {
-			pr_info("%s: Mitigating cpu %d frequency to %d\n",
-				KBUILD_MODNAME, cpu_node->cpu,
+			pr_info("Mitigating CPU%d frequency to %d\n",
+				cpu_node->cpu,
 				msm_thermal_info.freq_limit);
 
 			cpu_node->max_freq = true;
@@ -1490,8 +1529,8 @@
 		break;
 	case THERMAL_TRIP_CONFIGURABLE_LOW:
 		if (cpu_node->max_freq) {
-			pr_info("%s: Removing frequency mitigation for cpu%d\n",
-				KBUILD_MODNAME, cpu_node->cpu);
+			pr_info("Removing frequency mitigation for CPU%d\n",
+				cpu_node->cpu);
 
 			cpu_node->max_freq = false;
 		}
@@ -1504,8 +1543,7 @@
 		cpu_node->freq_thresh_clear = true;
 		complete(&freq_mitigation_complete);
 	} else {
-		pr_err("%s: Frequency mitigation task is not initialized\n",
-			KBUILD_MODNAME);
+		pr_err("Frequency mitigation task is not initialized\n");
 	}
 
 	return 0;
@@ -1544,8 +1582,8 @@
 		"msm_thermal:freq_mitig");
 
 	if (IS_ERR(freq_mitigation_task)) {
-		pr_err("%s: Failed to create frequency mitigation thread\n",
-				KBUILD_MODNAME);
+		pr_err("Failed to create frequency mitigation thread. err:%ld\n",
+				PTR_ERR(freq_mitigation_task));
 		return;
 	}
 }
@@ -1555,11 +1593,13 @@
 	int ret = 0;
 
 	if (cpu >= num_possible_cpus()) {
-		pr_err("%s: Invalid input\n", KBUILD_MODNAME);
+		pr_err("Invalid input\n");
 		ret = -EINVAL;
 		goto set_freq_exit;
 	}
 
+	pr_debug("Userspace requested %s frequency %u for CPU%u\n",
+			(is_max) ? "Max" : "Min", freq, cpu);
 	if (is_max) {
 		if (cpus[cpu].user_max_freq == freq)
 			goto set_freq_exit;
@@ -1575,8 +1615,7 @@
 	if (freq_mitigation_task) {
 		complete(&freq_mitigation_complete);
 	} else {
-		pr_err("%s: Frequency mitigation task is not initialized\n",
-			KBUILD_MODNAME);
+		pr_err("Frequency mitigation task is not initialized\n");
 		ret = -ESRCH;
 		goto set_freq_exit;
 	}
@@ -1591,8 +1630,7 @@
 	struct therm_threshold *thresh_ptr;
 
 	if (!thresh_inp) {
-		pr_err("%s: %s: Invalid input\n",
-			KBUILD_MODNAME, __func__);
+		pr_err("Invalid input\n");
 		ret = -EINVAL;
 		goto therm_set_exit;
 	}
@@ -1621,16 +1659,17 @@
 	if (!vdd_rstr_enabled)
 		return;
 	if (!trig_thresh) {
-		pr_err("%s:%s Invalid input\n", KBUILD_MODNAME, __func__);
+		pr_err("Invalid input\n");
 		return;
 	}
 	if (trig_thresh->trip_triggered < 0)
 		goto set_and_exit;
 
 	mutex_lock(&vdd_rstr_mutex);
-	pr_debug("%s: sensor%d reached %d thresh for Vdd restriction\n",
-		KBUILD_MODNAME, trig_thresh->sensor_id,
-		trig_thresh->trip_triggered);
+	pr_debug("sensor:%d reached %s thresh for Vdd restriction\n",
+		tsens_id_map[trig_thresh->sensor_id],
+		(trig_thresh->trip_triggered == THERMAL_TRIP_CONFIGURABLE_HI) ?
+		"high" : "low");
 	switch (trig_thresh->trip_triggered) {
 	case THERMAL_TRIP_CONFIGURABLE_HI:
 		if (vdd_sens_status & BIT(trig_thresh->sensor_id))
@@ -1640,8 +1679,7 @@
 		vdd_sens_status |= BIT(trig_thresh->sensor_id);
 		break;
 	default:
-		pr_err("%s:%s: Unsupported trip type\n",
-			KBUILD_MODNAME, __func__);
+		pr_err("Unsupported trip type\n");
 		goto unlock_and_exit;
 		break;
 	}
@@ -1697,8 +1735,8 @@
 	thermal_monitor_task = kthread_run(do_thermal_monitor, NULL,
 		"msm_thermal:therm_monitor");
 	if (IS_ERR(thermal_monitor_task)) {
-		pr_err("%s: Failed to create thermal monitor thread\n",
-				KBUILD_MODNAME);
+		pr_err("Failed to create thermal monitor thread. err:%ld\n",
+				PTR_ERR(thermal_monitor_task));
 		goto init_exit;
 	}
 
@@ -1718,8 +1756,7 @@
 		thresh_data->parent->thresh_triggered = true;
 		complete(&thermal_monitor_complete);
 	} else {
-		pr_err("%s: Thermal monitor task is not initialized\n",
-			KBUILD_MODNAME);
+		pr_err("Thermal monitor task is not initialized\n");
 	}
 	return 0;
 }
@@ -1733,14 +1770,13 @@
 
 	if (!callback || index >= MSM_LIST_MAX_NR || index < 0
 		|| sensor_id == -ENODEV) {
-		pr_err("%s: Invalid input to init_threshold\n",
-			KBUILD_MODNAME);
+		pr_err("Invalid input. sensor:%d. index:%d\n",
+				sensor_id, index);
 		ret = -EINVAL;
 		goto init_thresh_exit;
 	}
 	if (thresh[index].thresh_list) {
-		pr_err("%s: threshold already initialized\n",
-			KBUILD_MODNAME);
+		pr_err("threshold id:%d already initialized\n", index);
 		ret = -EEXIST;
 		goto init_thresh_exit;
 	}
@@ -1751,7 +1787,7 @@
 	thresh[index].thresh_list = kzalloc(sizeof(struct therm_threshold) *
 					thresh[index].thresh_ct, GFP_KERNEL);
 	if (!thresh[index].thresh_list) {
-		pr_err("%s: kzalloc failed\n", KBUILD_MODNAME);
+		pr_err("kzalloc failed for thresh index:%d\n", index);
 		ret = -ENOMEM;
 		goto init_thresh_exit;
 	}
@@ -1813,6 +1849,7 @@
 		if (cpus[cpu].limited_max_freq == UINT_MAX &&
 			cpus[cpu].limited_min_freq == 0)
 			continue;
+		pr_info("Max frequency reset for CPU%d\n", cpu);
 		cpus[cpu].limited_max_freq = UINT_MAX;
 		cpus[cpu].limited_min_freq = 0;
 		update_cpu_freq(cpu);
@@ -1827,7 +1864,7 @@
 		return;
 	}
 	if (polling_enabled) {
-		pr_info("%s: Interrupt mode init\n", KBUILD_MODNAME);
+		pr_info("Interrupt mode init\n");
 		polling_enabled = 0;
 		disable_msm_thermal();
 		hotplug_init();
@@ -1844,10 +1881,10 @@
 	if (!enabled)
 		interrupt_mode_init();
 	else
-		pr_info("%s: no action for enabled = %d\n",
-			KBUILD_MODNAME, enabled);
+		pr_info("no action for enabled = %d\n",
+			enabled);
 
-	pr_info("%s: enabled = %d\n", KBUILD_MODNAME, enabled);
+	pr_info("enabled = %d\n", enabled);
 
 	return ret;
 }
@@ -1874,7 +1911,7 @@
 
 	ret = kstrtoint(buf, 10, &val);
 	if (ret) {
-		pr_err("%s: Invalid input %s\n", KBUILD_MODNAME, buf);
+		pr_err("Invalid input %s. err:%d\n", buf, ret);
 		goto done_store_cc;
 	}
 
@@ -1883,15 +1920,14 @@
 
 	core_control_enabled = !!val;
 	if (core_control_enabled) {
-		pr_info("%s: Core control enabled\n", KBUILD_MODNAME);
+		pr_info("Core control enabled\n");
 		register_cpu_notifier(&msm_thermal_cpu_notifier);
 		if (hotplug_task)
 			complete(&hotplug_notify_complete);
 		else
-			pr_err("%s: Hotplug task is not initialized\n",
-					KBUILD_MODNAME);
+			pr_err("Hotplug task is not initialized\n");
 	} else {
-		pr_info("%s: Core control disabled\n", KBUILD_MODNAME);
+		pr_info("Core control disabled\n");
 		unregister_cpu_notifier(&msm_thermal_cpu_notifier);
 	}
 
@@ -1915,13 +1951,12 @@
 	mutex_lock(&core_control_mutex);
 	ret = kstrtouint(buf, 10, &val);
 	if (ret) {
-		pr_err("%s: Invalid input %s\n", KBUILD_MODNAME, buf);
+		pr_err("Invalid input %s. err:%d\n", buf, ret);
 		goto done_cc;
 	}
 
 	if (polling_enabled) {
-		pr_err("%s: Ignoring request; polling thread is enabled.\n",
-				KBUILD_MODNAME);
+		pr_err("Ignoring request; polling thread is enabled.\n");
 		goto done_cc;
 	}
 
@@ -1929,12 +1964,15 @@
 		if (!(msm_thermal_info.core_control_mask & BIT(cpu)))
 			continue;
 		cpus[cpu].user_offline = !!(val & BIT(cpu));
+		pr_debug("\"%s\"(PID:%i) requests %s CPU%d.\n", current->comm,
+			current->pid, (cpus[cpu].user_offline) ? "offline" :
+			"online", cpu);
 	}
 
 	if (hotplug_task)
 		complete(&hotplug_notify_complete);
 	else
-		pr_err("%s: Hotplug task is not initialized\n", KBUILD_MODNAME);
+		pr_err("Hotplug task is not initialized\n");
 done_cc:
 	mutex_unlock(&core_control_mutex);
 	return count;
@@ -2009,23 +2047,21 @@
 
 	module_kobj = kset_find_obj(module_kset, KBUILD_MODNAME);
 	if (!module_kobj) {
-		pr_err("%s: cannot find kobject for module\n",
-			KBUILD_MODNAME);
+		pr_err("cannot find kobject\n");
 		ret = -ENOENT;
 		goto done_cc_nodes;
 	}
 
 	cc_kobj = kobject_create_and_add("core_control", module_kobj);
 	if (!cc_kobj) {
-		pr_err("%s: cannot create core control kobj\n",
-				KBUILD_MODNAME);
+		pr_err("cannot create core control kobj\n");
 		ret = -ENOMEM;
 		goto done_cc_nodes;
 	}
 
 	ret = sysfs_create_group(cc_kobj, &cc_attr_group);
 	if (ret) {
-		pr_err("%s: cannot create group\n", KBUILD_MODNAME);
+		pr_err("cannot create sysfs group. err:%d\n", ret);
 		goto done_cc_nodes;
 	}
 
@@ -2078,6 +2114,7 @@
 
 	tsens_get_max_sensor_num(&max_tsens_num);
 	if (create_sensor_id_map()) {
+		pr_err("Creating sensor id map failed\n");
 		ret = -EINVAL;
 		goto pre_init_exit;
 	}
@@ -2087,8 +2124,7 @@
 				sizeof(struct threshold_info) * MSM_LIST_MAX_NR,
 				GFP_KERNEL);
 		if (!thresh) {
-			pr_err("%s:%s: kzalloc failed\n",
-				KBUILD_MODNAME, __func__);
+			pr_err("kzalloc failed\n");
 			ret = -ENOMEM;
 			goto pre_init_exit;
 		}
@@ -2119,16 +2155,19 @@
 	BUG_ON(!pdata);
 	memcpy(&msm_thermal_info, pdata, sizeof(struct msm_thermal_data));
 
-	if (check_sensor_id(msm_thermal_info.sensor_id))
+	if (check_sensor_id(msm_thermal_info.sensor_id)) {
+		pr_err("Invalid sensor:%d for polling\n",
+				msm_thermal_info.sensor_id);
 		return -EINVAL;
+	}
 
 	enabled = 1;
 	polling_enabled = 1;
 	ret = cpufreq_register_notifier(&msm_thermal_cpufreq_notifier,
 			CPUFREQ_POLICY_NOTIFIER);
 	if (ret)
-		pr_err("%s: cannot register cpufreq notifier\n",
-			KBUILD_MODNAME);
+		pr_err("cannot register cpufreq notifier. err:%d\n", ret);
+
 	INIT_DELAYED_WORK(&check_temp_work, check_temp);
 	schedule_delayed_work(&check_temp_work, 0);
 
@@ -2190,8 +2229,7 @@
 			if (freq_table_get)
 				ret = vdd_restriction_apply_freq(&rails[i], 0);
 			else
-				pr_info("%s:Defer vdd rstr freq init\n",
-						__func__);
+				pr_info("Defer vdd rstr freq init.\n");
 		} else {
 			rails[i].reg = devm_regulator_get(&pdev->dev,
 					rails[i].name);
@@ -2199,12 +2237,14 @@
 				ret = PTR_ERR(rails[i].reg);
 				if (ret != -EPROBE_DEFER) {
 					pr_err( \
-					"%s, could not get regulator: %s\n",
-					rails[i].name, __func__);
+					"could not get regulator: %s. err:%d\n",
+					rails[i].name, ret);
 					rails[i].reg = NULL;
 					rails[i].curr_level = -2;
 					return ret;
 				}
+				pr_info("Defer regulator %s probe\n",
+					rails[i].name);
 				return ret;
 			}
 			/*
@@ -2230,11 +2270,13 @@
 		if (IS_ERR_OR_NULL(psm_rails[i].reg)) {
 			ret = PTR_ERR(psm_rails[i].reg);
 			if (ret != -EPROBE_DEFER) {
-				pr_err("%s, could not get rpm regulator: %s\n",
-					psm_rails[i].name, __func__);
+				pr_err("couldn't get rpm regulator %s. err%d\n",
+					psm_rails[i].name, ret);
 				psm_rails[i].reg = NULL;
 				goto psm_reg_exit;
 			}
+			pr_info("Defer regulator %s probe\n",
+					psm_rails[i].name);
 			return ret;
 		}
 		/* Apps default vote for PWM mode */
@@ -2242,7 +2284,7 @@
 		ret = rpm_regulator_set_mode(psm_rails[i].reg,
 				psm_rails[i].init);
 		if (ret) {
-			pr_err("%s: Cannot set PMIC PWM mode\n", __func__);
+			pr_err("Cannot set PMIC PWM mode. err:%d\n", ret);
 			return ret;
 		} else
 			psm_rails[i].mode = PMIC_PWM_MODE;
@@ -2311,22 +2353,21 @@
 
 	module_kobj = kset_find_obj(module_kset, KBUILD_MODNAME);
 	if (!module_kobj) {
-		pr_err("%s: cannot find kobject for module %s\n",
-			__func__, KBUILD_MODNAME);
+		pr_err("cannot find kobject\n");
 		rc = -ENOENT;
 		goto thermal_sysfs_add_exit;
 	}
 
 	vdd_rstr_kobj = kobject_create_and_add("vdd_restriction", module_kobj);
 	if (!vdd_rstr_kobj) {
-		pr_err("%s: cannot create vdd_restriction kobject\n", __func__);
+		pr_err("cannot create vdd_restriction kobject\n");
 		rc = -ENOMEM;
 		goto thermal_sysfs_add_exit;
 	}
 
 	rc = sysfs_create_group(vdd_rstr_kobj, &vdd_rstr_en_attribs_gp);
 	if (rc) {
-		pr_err("%s: cannot create kobject attribute group\n", __func__);
+		pr_err("cannot create kobject attribute group. err:%d\n", rc);
 		rc = -ENOMEM;
 		goto thermal_sysfs_add_exit;
 	}
@@ -2335,8 +2376,8 @@
 		vdd_rstr_reg_kobj[i] = kobject_create_and_add(rails[i].name,
 					vdd_rstr_kobj);
 		if (!vdd_rstr_reg_kobj[i]) {
-			pr_err("%s: cannot create for kobject for %s\n",
-					__func__, rails[i].name);
+			pr_err("cannot create kobject for %s\n",
+					rails[i].name);
 			rc = -ENOMEM;
 			goto thermal_sysfs_add_exit;
 		}
@@ -2344,6 +2385,7 @@
 		rails[i].attr_gp.attrs = kzalloc(sizeof(struct attribute *) * 3,
 					GFP_KERNEL);
 		if (!rails[i].attr_gp.attrs) {
+			pr_err("kzalloc failed\n");
 			rc = -ENOMEM;
 			goto thermal_sysfs_add_exit;
 		}
@@ -2355,8 +2397,8 @@
 		rc = sysfs_create_group(vdd_rstr_reg_kobj[i],
 				&rails[i].attr_gp);
 		if (rc) {
-			pr_err("%s: cannot create attribute group for %s\n",
-					__func__, rails[i].name);
+			pr_err("cannot create attribute group for %s. err:%d\n",
+					rails[i].name, rc);
 			goto thermal_sysfs_add_exit;
 		}
 	}
@@ -2467,15 +2509,14 @@
 
 	module_kobj = kset_find_obj(module_kset, KBUILD_MODNAME);
 	if (!module_kobj) {
-		pr_err("%s: cannot find kobject for module %s\n",
-			__func__, KBUILD_MODNAME);
+		pr_err("cannot find kobject\n");
 		rc = -ENOENT;
 		goto psm_node_exit;
 	}
 
 	psm_kobj = kobject_create_and_add("pmic_sw_mode", module_kobj);
 	if (!psm_kobj) {
-		pr_err("%s: cannot create psm kobject\n", KBUILD_MODNAME);
+		pr_err("cannot create psm kobject\n");
 		rc = -ENOMEM;
 		goto psm_node_exit;
 	}
@@ -2484,14 +2525,15 @@
 		psm_reg_kobj[i] = kobject_create_and_add(psm_rails[i].name,
 					psm_kobj);
 		if (!psm_reg_kobj[i]) {
-			pr_err("%s: cannot create for kobject for %s\n",
-					KBUILD_MODNAME, psm_rails[i].name);
+			pr_err("cannot create kobject for %s\n",
+					psm_rails[i].name);
 			rc = -ENOMEM;
 			goto psm_node_exit;
 		}
 		psm_rails[i].attr_gp.attrs = kzalloc( \
 				sizeof(struct attribute *) * 2, GFP_KERNEL);
 		if (!psm_rails[i].attr_gp.attrs) {
+			pr_err("kzalloc failed\n");
 			rc = -ENOMEM;
 			goto psm_node_exit;
 		}
@@ -2501,8 +2543,8 @@
 
 		rc = sysfs_create_group(psm_reg_kobj[i], &psm_rails[i].attr_gp);
 		if (rc) {
-			pr_err("%s: cannot create attribute group for %s\n",
-					KBUILD_MODNAME, psm_rails[i].name);
+			pr_err("cannot create attribute group for %s. err:%d\n",
+					psm_rails[i].name, rc);
 			goto psm_node_exit;
 		}
 	}
@@ -2549,14 +2591,14 @@
 	if (rails_cnt == 0)
 		goto read_node_fail;
 	if (rails_cnt >= MAX_RAILS) {
-		pr_err("%s: Too many rails.\n", __func__);
+		pr_err("Too many rails:%d.\n", rails_cnt);
 		return -EFAULT;
 	}
 
 	rails = kzalloc(sizeof(struct rail) * rails_cnt,
 				GFP_KERNEL);
 	if (!rails) {
-		pr_err("%s: Fail to allocate memory for rails.\n", __func__);
+		pr_err("Fail to allocate memory for rails.\n");
 		return -ENOMEM;
 	}
 
@@ -2573,7 +2615,8 @@
 		rails[i].num_levels = arr_size/sizeof(__be32);
 		if (rails[i].num_levels >
 			sizeof(rails[i].levels)/sizeof(uint32_t)) {
-			pr_err("%s: Array size too large\n", __func__);
+			pr_err("Array size:%d too large for index:%d\n",
+				rails[i].num_levels, i);
 			return -EFAULT;
 		}
 		ret = of_property_read_u32_array(child_node, key,
@@ -2601,23 +2644,26 @@
 	if (rails_cnt) {
 		ret = vdd_restriction_reg_init(pdev);
 		if (ret) {
-			pr_info("%s:Failed to get regulators. KTM continues.\n",
-				__func__);
+			pr_err("Err regulator init. err:%d. KTM continues.\n",
+					ret);
 			goto read_node_fail;
 		}
 		ret = init_threshold(MSM_VDD_RESTRICTION, MONITOR_ALL_TSENS,
 			data->vdd_rstr_temp_hyst_degC, data->vdd_rstr_temp_degC,
 			vdd_restriction_notify);
-		if (ret)
+		if (ret) {
+			pr_err("Error in initializing thresholds. err:%d\n",
+					ret);
 			goto read_node_fail;
+		}
 		vdd_rstr_enabled = true;
 	}
 read_node_fail:
 	vdd_rstr_probed = true;
 	if (ret) {
 		dev_info(&pdev->dev,
-			"%s:Failed reading node=%s, key=%s. KTM continues\n",
-			__func__, node->full_name, key);
+		"%s:Failed reading node=%s, key=%s. err=%d. KTM continues\n",
+			__func__, node->full_name, key, ret);
 		kfree(rails);
 		rails_cnt = 0;
 	}
@@ -2890,7 +2936,7 @@
 	psm_rails = kzalloc(sizeof(struct psm_rail) * psm_rails_cnt,
 			GFP_KERNEL);
 	if (!psm_rails) {
-		pr_err("%s: Fail to allocate memory for psm rails\n", __func__);
+		pr_err("Fail to allocate memory for psm rails\n");
 		psm_rails_cnt = 0;
 		return -ENOMEM;
 	}
@@ -2905,8 +2951,8 @@
 	if (psm_rails_cnt) {
 		ret = psm_reg_init(pdev);
 		if (ret) {
-			pr_info("%s:Failed to get regulators. KTM continues.\n",
-					__func__);
+			pr_err("Err regulator init. err:%d. KTM continues.\n",
+					ret);
 			goto read_node_fail;
 		}
 		psm_enabled = true;
@@ -2916,8 +2962,8 @@
 	psm_probed = true;
 	if (ret) {
 		dev_info(&pdev->dev,
-			"%s:Failed reading node=%s, key=%s. KTM continues\n",
-			__func__, node->full_name, key);
+		"%s:Failed reading node=%s, key=%s. err=%d. KTM continues\n",
+			__func__, node->full_name, key, ret);
 		kfree(psm_rails);
 		psm_rails_cnt = 0;
 	}
@@ -2968,7 +3014,7 @@
 	key = "qcom,cpu-sensors";
 	cpu_cnt = of_property_count_strings(node, key);
 	if (cpu_cnt < num_possible_cpus()) {
-		pr_err("%s: Wrong number of cpu sensors\n", KBUILD_MODNAME);
+		pr_err("Wrong number of cpu sensors:%d\n", cpu_cnt);
 		ret = -EINVAL;
 		goto hotplug_node_fail;
 	}
@@ -2983,8 +3029,8 @@
 read_node_fail:
 	if (ret) {
 		dev_info(&pdev->dev,
-			"%s:Failed reading node=%s, key=%s. KTM continues\n",
-			KBUILD_MODNAME, node->full_name, key);
+		"%s:Failed reading node=%s, key=%s. err=%d. KTM continues\n",
+			KBUILD_MODNAME, node->full_name, key, ret);
 		core_control_enabled = 0;
 	}
 
@@ -2993,8 +3039,8 @@
 hotplug_node_fail:
 	if (ret) {
 		dev_info(&pdev->dev,
-			"%s:Failed reading node=%s, key=%s. KTM continues\n",
-			KBUILD_MODNAME, node->full_name, key);
+		"%s:Failed reading node=%s, key=%s. err=%d. KTM continues\n",
+			KBUILD_MODNAME, node->full_name, key, ret);
 		hotplug_enabled = 0;
 	}
 
@@ -3034,8 +3080,8 @@
 PROBE_FREQ_EXIT:
 	if (ret) {
 		dev_info(&pdev->dev,
-			"%s:Failed reading node=%s, key=%s. KTM continues\n",
-			__func__, node->full_name, key);
+		"%s:Failed reading node=%s, key=%s. err=%d. KTM continues\n",
+			__func__, node->full_name, key, ret);
 		freq_mitigation_enabled = 0;
 	}
 	return ret;
@@ -3050,8 +3096,10 @@
 
 	memset(&data, 0, sizeof(struct msm_thermal_data));
 	ret = msm_thermal_pre_init();
-	if (ret)
+	if (ret) {
+		pr_err("thermal pre init failed. err:%d\n", ret);
 		goto fail;
+	}
 
 	key = "qcom,sensor-id";
 	ret = of_property_read_u32(node, key, &data.sensor_id);
@@ -3135,8 +3183,8 @@
 	return ret;
 fail:
 	if (ret)
-		pr_err("%s: Failed reading node=%s, key=%s\n",
-			__func__, node->full_name, key);
+		pr_err("Failed reading node=%s, key=%s. err:%d\n",
+			node->full_name, key, ret);
 
 	return ret;
 }