msm: thermal: Add support in KTM to export sensor information

		};

	};

The sensor information node is an optional node that holds information

about thermal sensors on a target. The information includes sensor type,

sensor name, sensor alias and sensor scaling factor. The parent node

name is qcom,sensor-information. It has a list of optional child

nodes, each representing a sensor. The child node is named as

qcom,sensor-information@<id>. The id takes values sequentially

from 0 to N-1 where N is the number of sensors. This id doesn't

relate to zone id or sensor id.

The devicetree representation of sensor information node should be:

1.0 Required properties:

- compatible: "qcom,sensor-information"

1.1 Optional nodes:

qcom,sensor-information@<id>

The below properties belong to the child node qcom,sensor-information@<id>.

Following are the required and optional properties of a child node.

1.1.a Required properties:

- qcom,sensor-type: Type of a sensor. A sensor can be of type tsens,

			alarm or adc.

			tsens: 	Sensors that are on MSM die.

			alarm: 	Sensors that are on PMIC die.

			adc:   	Sensors that are usually thermistors

				placed out of the die.

- qcom,sensor-name: Name of a sensor as defined by low level sensor driver.

1.1.b Optional properties:

- qcom,alias-name: Alias name for a sensor. The alias name corresponds

			to a device such as cpu/gpu/pop-mem whose temperature

			is relative to the sensor temperature defined in the

			child node.

- qcom,scaling-factor: The unit that needs to be multiplied to the

			sensor temperature to get temperature unit in

			degree centigrade. If this property is not

			present, a default scaling factor of 1 is assigned

			to a sensor.

Example:

	qcom,sensor-information {

		compatible = "qcom,sensor-information";

		sensor_information0: qcom,sensor-information@0 {

			qcom,sensor-type = "tsens";

			qcom,sensor-name = "tsens_tz_sensor0";

		};

		sensor_information1: qcom,sensor-information@1 {

			qcom,sensor-type =  "tsens";

			qcom,sensor-name = "tsens_tz_sensor1";

		};

		sensor_information2: qcom,sensor-information@2 {

			qcom,sensor-type =  "tsens";

			qcom,sensor-name = "tsens_tz_sensor2";

		};

		sensor_information3: qcom,sensor-information@3 {

			qcom,sensor-type =  "tsens";

			qcom,sensor-name = "tsens_tz_sensor3";

		};

		sensor_information4: qcom,sensor-information@4 {

			qcom,sensor-type = "tsens";

			qcom,sensor-name = "tsens_tz_sensor4";

		};

		sensor_information5: qcom,sensor-information@5 {

			qcom,sensor-type = "tsens";

			qcom,sensor-name = "tsens_tz_sensor5";

		};

		sensor_information6: qcom,sensor-information@6 {

			qcom,sensor-type = "tsens";

			qcom,sensor-name = "tsens_tz_sensor6";

			qcom,alias-name = "cpu7";

		}

		sensor_information7: qcom,sensor-information@7 {

			qcom,sensor-type =  "alarm";

			qcom,sensor-name = "pm8994_tz";

			qcom,scaling-factor = <1000>;

                };

	};

#define TSENS_NAME_MAX 20

#define TSENS_NAME_FORMAT "tsens_tz_sensor%d"

#define THERM_SECURE_BITE_CMD 8

#define SENSOR_SCALING_FACTOR 1

static struct msm_thermal_data msm_thermal_info;

static struct delayed_work check_temp_work;

static int enabled;

static int polling_enabled;

static int rails_cnt;

static int sensor_cnt;

static int psm_rails_cnt;

static int ocr_rail_cnt;

static int limit_idx;

static bool vdd_rstr_enabled;

static bool vdd_rstr_nodes_called;

static bool vdd_rstr_probed;

static bool sensor_info_nodes_called;

static bool sensor_info_probed;

static bool psm_enabled;

static bool psm_nodes_called;

static bool psm_probed;

	struct attribute_group attr_gp;

};

struct msm_sensor_info {

	const char *name;

	const char *alias;

	const char *type;

	uint32_t   scaling_factor;

};

struct psm_rail {

	const char *name;

	uint8_t init;

static struct psm_rail *psm_rails;

static struct psm_rail *ocr_rails;

static struct rail *rails;

static struct msm_sensor_info *sensors;

static struct cpu_info cpus[NR_CPUS];

static struct threshold_info *thresh;

static bool mx_restr_applied;

	return output;

}

static ssize_t sensor_info_show(

	struct kobject *kobj, struct kobj_attribute *attr, char *buf)

{

	int i;

	ssize_t tot_size = 0, size = 0;

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

		size = snprintf(&buf[tot_size], PAGE_SIZE - tot_size,

			"%s:%s:%s:%d ",

			sensors[i].type, sensors[i].name,

			sensors[i].alias ? : "",

			sensors[i].scaling_factor);

		if (tot_size + size >= PAGE_SIZE) {

			pr_err("Not enough buffer size\n");

			break;

		}

		tot_size += size;

	}

	if (tot_size)

		buf[tot_size - 1] = '\n';

	return tot_size;

}

static struct vdd_rstr_enable vdd_rstr_en = {

	.ko_attr.attr.name = __stringify(enabled),

	.ko_attr.attr.mode = 0644,

	return ret;

}

static struct kobj_attribute sensor_info_attr =

		__ATTR_RO(sensor_info);

static int msm_thermal_add_sensor_info_nodes(void)

{

	struct kobject *module_kobj = NULL;

	int ret = 0;

	if (!sensor_info_probed) {

		sensor_info_nodes_called = true;

		return ret;

	}

	if (sensor_info_probed && sensor_cnt == 0)

		return ret;

	module_kobj = kset_find_obj(module_kset, KBUILD_MODNAME);

	if (!module_kobj) {

		pr_err("cannot find kobject\n");

		return -ENOENT;

	}

	sysfs_attr_init(&sensor_info_attr.attr);

	ret = sysfs_create_file(module_kobj, &sensor_info_attr.attr);

	if (ret) {

		pr_err(

		"cannot create sensor info kobject attribute. err:%d\n",

		ret);

		return ret;

	}

	return ret;

}

static int msm_thermal_add_vdd_rstr_nodes(void)

{

	struct kobject *module_kobj = NULL;

	return ret;

}

static void probe_sensor_info(struct device_node *node,

		struct msm_thermal_data *data, struct platform_device *pdev)

{

	int err = 0;

	int i = 0;

	char *key = NULL;

	struct device_node *child_node = NULL;

	struct device_node *np = NULL;

	np = of_find_compatible_node(NULL, NULL, "qcom,sensor-information");

	if (!np) {

		dev_info(&pdev->dev,

		"%s:unable to find DT for sensor-information.KTM continues\n",

		__func__);

		sensor_info_probed = true;

		return;

	}

	sensor_cnt = of_get_child_count(np);

	if (sensor_cnt == 0) {

		err = -ENODEV;

		goto read_node_fail;

	}

	sensors = devm_kzalloc(&pdev->dev,

			sizeof(struct msm_sensor_info) * sensor_cnt,

			GFP_KERNEL);

	if (!sensors) {

		pr_err("Fail to allocate memory for sensor_info.\n");

		err = -ENOMEM;

		goto read_node_fail;

	}

	for_each_child_of_node(np, child_node) {

		key = "qcom,sensor-type";

		err = of_property_read_string(child_node,

				key, &sensors[i].type);

		if (err)

			goto read_node_fail;

		key = "qcom,sensor-name";

		err = of_property_read_string(child_node,

				key, &sensors[i].name);

		if (err)

			goto read_node_fail;

		key = "qcom,alias-name";

		of_property_read_string(child_node,

				key, &sensors[i].alias);

		key = "qcom,scaling-factor";

		err = of_property_read_u32(child_node,

				key, &sensors[i].scaling_factor);

		if (err) {

			sensors[i].scaling_factor = SENSOR_SCALING_FACTOR;

			err = 0;

		}

		i++;

	}

read_node_fail:

	sensor_info_probed = true;

	if (err) {

		dev_info(&pdev->dev,

		"%s:Failed reading node=%s, key=%s. err=%d. KTM continues\n",

			__func__, np->full_name, key, err);

		devm_kfree(&pdev->dev, sensors);

	}

}

static int probe_ocr(struct device_node *node, struct msm_thermal_data *data,

		struct platform_device *pdev)

{

	ret = probe_vdd_rstr(node, &data, pdev);

	if (ret == -EPROBE_DEFER)

		goto fail;

	probe_sensor_info(node, &data, pdev);

	ret = probe_ocr(node, &data, pdev);

	/*

		msm_thermal_add_vdd_rstr_nodes();

		vdd_rstr_nodes_called = false;

	}

	if (sensor_info_nodes_called) {

		msm_thermal_add_sensor_info_nodes();

		sensor_info_nodes_called = false;

	}

	if (ocr_nodes_called) {

		msm_thermal_add_ocr_nodes();

		ocr_nodes_called = false;

		msm_thermal_add_cc_nodes();

	msm_thermal_add_psm_nodes();

	msm_thermal_add_vdd_rstr_nodes();

	msm_thermal_add_sensor_info_nodes();

	if (ocr_reg_init_defer) {

		if (!ocr_reg_init(msm_thermal_info.pdev)) {

			ocr_enabled = true;