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Commit 83786094 authored by Anji Jonnala's avatar Anji Jonnala
Browse files

msm: thermal: Store temperature of tsens on kernel panic notification 



Register KTM with panic notifier with a callback on boot and
on callback store all tsens temperature into static variable.
This will help rule out or confirm role of thermal for any
kernel crash.

Change-Id: Idb1315e08c82e50c31cf0aff2c4310162d33c7a2
Signed-off-by: default avatarAnji Jonnala <anjir@codeaurora.org>
parent ff447714

drivers/thermal/msm_thermal.c

+42 −2
Original line number Diff line number Diff line
@@ -123,6 +123,7 @@ static struct attribute_group mx_attr_group; 
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;



enum thermal_threshold {

	HOTPLUG_THRESHOLD_HIGH,
@@ -1595,6 +1596,23 @@ get_temp_exit: 
	return ret;

}



static int msm_thermal_panic_callback(struct notifier_block *nfb,

			unsigned long event, void *data)

{

	int i;



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

		therm_get_temp(tsens_id_map[i],

				THERM_TSENS_ID,

				&tsens_temp_at_panic[i]);



	return NOTIFY_OK;

}



static struct notifier_block msm_thermal_panic_notifier = {

	.notifier_call = msm_thermal_panic_callback,

};



static int set_threshold(uint32_t zone_id,

	struct sensor_threshold *threshold)

{
@@ -3652,7 +3670,26 @@ done_mx_nodes: 
	return ret;

}



int msm_thermal_pre_init(void)

static void msm_thermal_panic_notifier_init(struct device *dev)

{

	int i;



	tsens_temp_at_panic = devm_kzalloc(dev,

				sizeof(long) * max_tsens_num,

				GFP_KERNEL);

	if (!tsens_temp_at_panic) {

		pr_err("kzalloc failed\n");

		return;

	}



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

		tsens_temp_at_panic[i] = LONG_MIN;



	atomic_notifier_chain_register(&panic_notifier_list,

		&msm_thermal_panic_notifier);

}



int msm_thermal_pre_init(struct device *dev)

{

	int ret = 0;
@@ -3673,6 +3710,9 @@ int msm_thermal_pre_init(void) 
		goto pre_init_exit;

	}



	if (!tsens_temp_at_panic)

		msm_thermal_panic_notifier_init(dev);



	if (!thresh) {

		thresh = kzalloc(

				sizeof(struct threshold_info) * MSM_LIST_MAX_NR,
@@ -4813,7 +4853,7 @@ static int msm_thermal_dev_probe(struct platform_device *pdev) 
	memset(&data, 0, sizeof(struct msm_thermal_data));

	data.pdev = pdev;



	ret = msm_thermal_pre_init();

	ret = msm_thermal_pre_init(&pdev->dev);

	if (ret) {

		pr_err("thermal pre init failed. err:%d\n", ret);

		goto fail;