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Commit 2b67c3f1 authored by Ram Chandrasekar's avatar Ram Chandrasekar
Browse files

msm: thermal: Support a debugfs to control temperature logging 



Support a new debug file system entry, which can enable
or disable temperature logging during kernel panic.

This logging is disabled by default. The below command
can be used to enable this temperature logging,
echo 'Y' > /sys/kernel/debug/msm_thermal/log_tsens_temperature

Change-Id: I4c78c1f21dba6ecf3c91b2ba6c731d8c44570dfb
Signed-off-by: default avatarRam Chandrasekar <rkumbako@codeaurora.org>
parent 7e5f74b2

drivers/thermal/msm_thermal.c

+65 −1
Original line number Diff line number Diff line
@@ -39,6 +39,7 @@ 
#include <linux/msm_thermal_ioctl.h>

#include <soc/qcom/rpm-smd.h>

#include <soc/qcom/scm.h>

#include <linux/debugfs.h>



#define CREATE_TRACE_POINTS

#define TRACE_MSM_THERMAL
@@ -52,6 +53,18 @@ 
#define TSENS_NAME_FORMAT "tsens_tz_sensor%d"

#define THERM_SECURE_BITE_CMD 8

#define SENSOR_SCALING_FACTOR 1

#define MSM_THERMAL_NAME "msm_thermal"

#define MSM_TSENS_PRINT  "log_tsens_temperature"



#define THERM_CREATE_DEBUGFS_DIR(_node, _name, _parent, _ret) \

	do { \

		_node = debugfs_create_dir(_name, _parent); \

		if (IS_ERR(_node)) { \

			_ret = PTR_ERR(_node); \

			pr_err("Error creating debugfs dir:%s. err:%d\n", \

					_name, _ret); \

		} \

	} while (0)



static struct msm_thermal_data msm_thermal_info;

static struct delayed_work check_temp_work;
@@ -124,6 +137,7 @@ static struct regulator *vdd_mx; 
static struct cpufreq_frequency_table *pending_freq_table_ptr;

static int pending_cpu_freq = -1;

static long *tsens_temp_at_panic;

static u32 tsens_temp_print;



enum thermal_threshold {

	HOTPLUG_THRESHOLD_HIGH,
@@ -246,6 +260,11 @@ enum msm_temp_band { 
	MSM_TEMP_MAX_NR,

};



struct msm_thermal_debugfs_entry {

	struct dentry *parent;

	struct dentry *tsens_print;

};



static struct psm_rail *psm_rails;

static struct psm_rail *ocr_rails;

static struct rail *rails;
@@ -254,6 +273,7 @@ static struct cpu_info cpus[NR_CPUS]; 
static struct threshold_info *thresh;

static bool mx_restr_applied;

static struct cluster_info *core_ptr;

static struct msm_thermal_debugfs_entry *msm_therm_debugfs;



struct vdd_rstr_enable {

	struct kobj_attribute ko_attr;
@@ -479,6 +499,43 @@ static ssize_t cluster_info_show( 
	return tot_size;

}



static int create_thermal_debugfs(void)

{

	int ret = 0;



	if (msm_therm_debugfs)

		return ret;



	msm_therm_debugfs = devm_kzalloc(&msm_thermal_info.pdev->dev,

			sizeof(struct msm_thermal_debugfs_entry), GFP_KERNEL);

	if (!msm_therm_debugfs) {

		ret = -ENOMEM;

		pr_err("Memory alloc failed. err:%d\n", ret);

		return ret;

	}



	THERM_CREATE_DEBUGFS_DIR(msm_therm_debugfs->parent, MSM_THERMAL_NAME,

		NULL, ret);

	if (ret)

		goto create_exit;



	msm_therm_debugfs->tsens_print = debugfs_create_bool(MSM_TSENS_PRINT,

			0600, msm_therm_debugfs->parent, &tsens_temp_print);

	if (IS_ERR(msm_therm_debugfs->tsens_print)) {

		ret = PTR_ERR(msm_therm_debugfs->tsens_print);

		pr_err("Error creating debugfs:[%s]. err:%d\n",

			MSM_TSENS_PRINT, ret);

		goto create_exit;

	}



create_exit:

	if (ret) {

		debugfs_remove_recursive(msm_therm_debugfs->parent);

		devm_kfree(&msm_thermal_info.pdev->dev, msm_therm_debugfs);

	}

	return ret;

}



static struct kobj_attribute cluster_info_attr = __ATTR_RO(cluster_info);

static int create_cpu_topology_sysfs(void)

{
@@ -1601,10 +1658,14 @@ static int msm_thermal_panic_callback(struct notifier_block *nfb, 
{

	int i;



	for (i = 0; i < max_tsens_num; i++)

	for (i = 0; i < max_tsens_num; i++) {

		therm_get_temp(tsens_id_map[i],

				THERM_TSENS_ID,

				&tsens_temp_at_panic[i]);

		if (tsens_temp_print)

			pr_err("tsens%d temperature:%ldC\n",

				tsens_id_map[i], tsens_temp_at_panic[i]);

	}



	return NOTIFY_OK;

}
@@ -4968,6 +5029,8 @@ static int msm_thermal_dev_exit(struct platform_device *inp_dev) 
{

	int i = 0;



	if (msm_therm_debugfs && msm_therm_debugfs->parent)

		debugfs_remove_recursive(msm_therm_debugfs->parent);

	msm_thermal_ioctl_cleanup();

	if (thresh) {

		if (vdd_rstr_enabled)
@@ -5033,6 +5096,7 @@ int __init msm_thermal_late_init(void) 
	msm_thermal_add_mx_nodes();

	interrupt_mode_init();

	create_cpu_topology_sysfs();

	create_thermal_debugfs();

	return 0;

}

late_initcall(msm_thermal_late_init);