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path: root/drivers/hwmon/abx500.c
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Diffstat (limited to 'drivers/hwmon/abx500.c')
-rw-r--r--drivers/hwmon/abx500.c487
1 files changed, 0 insertions, 487 deletions
diff --git a/drivers/hwmon/abx500.c b/drivers/hwmon/abx500.c
deleted file mode 100644
index 4b9648819836..000000000000
--- a/drivers/hwmon/abx500.c
+++ /dev/null
@@ -1,487 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (C) ST-Ericsson 2010 - 2013
- * Author: Martin Persson <martin.persson@stericsson.com>
- * Hongbo Zhang <hongbo.zhang@linaro.org>
- *
- * ABX500 does not provide auto ADC, so to monitor the required temperatures,
- * a periodic work is used. It is more important to not wake up the CPU than
- * to perform this job, hence the use of a deferred delay.
- *
- * A deferred delay for thermal monitor is considered safe because:
- * If the chip gets too hot during a sleep state it's most likely due to
- * external factors, such as the surrounding temperature. I.e. no SW decisions
- * will make any difference.
- */
-
-#include <linux/err.h>
-#include <linux/hwmon.h>
-#include <linux/hwmon-sysfs.h>
-#include <linux/interrupt.h>
-#include <linux/jiffies.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/of.h>
-#include <linux/platform_device.h>
-#include <linux/pm.h>
-#include <linux/slab.h>
-#include <linux/sysfs.h>
-#include <linux/workqueue.h>
-#include "abx500.h"
-
-#define DEFAULT_MONITOR_DELAY HZ
-#define DEFAULT_MAX_TEMP 130
-
-static inline void schedule_monitor(struct abx500_temp *data)
-{
- data->work_active = true;
- schedule_delayed_work(&data->work, DEFAULT_MONITOR_DELAY);
-}
-
-static void threshold_updated(struct abx500_temp *data)
-{
- int i;
- for (i = 0; i < data->monitored_sensors; i++)
- if (data->max[i] != 0 || data->min[i] != 0) {
- schedule_monitor(data);
- return;
- }
-
- dev_dbg(&data->pdev->dev, "No active thresholds.\n");
- cancel_delayed_work_sync(&data->work);
- data->work_active = false;
-}
-
-static void gpadc_monitor(struct work_struct *work)
-{
- int temp, i, ret;
- char alarm_node[30];
- bool updated_min_alarm, updated_max_alarm;
- struct abx500_temp *data;
-
- data = container_of(work, struct abx500_temp, work.work);
- mutex_lock(&data->lock);
-
- for (i = 0; i < data->monitored_sensors; i++) {
- /* Thresholds are considered inactive if set to 0 */
- if (data->max[i] == 0 && data->min[i] == 0)
- continue;
-
- if (data->max[i] < data->min[i])
- continue;
-
- ret = data->ops.read_sensor(data, data->gpadc_addr[i], &temp);
- if (ret < 0) {
- dev_err(&data->pdev->dev, "GPADC read failed\n");
- continue;
- }
-
- updated_min_alarm = false;
- updated_max_alarm = false;
-
- if (data->min[i] != 0) {
- if (temp < data->min[i]) {
- if (data->min_alarm[i] == false) {
- data->min_alarm[i] = true;
- updated_min_alarm = true;
- }
- } else {
- if (data->min_alarm[i] == true) {
- data->min_alarm[i] = false;
- updated_min_alarm = true;
- }
- }
- }
- if (data->max[i] != 0) {
- if (temp > data->max[i]) {
- if (data->max_alarm[i] == false) {
- data->max_alarm[i] = true;
- updated_max_alarm = true;
- }
- } else if (temp < data->max[i] - data->max_hyst[i]) {
- if (data->max_alarm[i] == true) {
- data->max_alarm[i] = false;
- updated_max_alarm = true;
- }
- }
- }
-
- if (updated_min_alarm) {
- ret = sprintf(alarm_node, "temp%d_min_alarm", i + 1);
- sysfs_notify(&data->pdev->dev.kobj, NULL, alarm_node);
- }
- if (updated_max_alarm) {
- ret = sprintf(alarm_node, "temp%d_max_alarm", i + 1);
- sysfs_notify(&data->pdev->dev.kobj, NULL, alarm_node);
- }
- }
-
- schedule_monitor(data);
- mutex_unlock(&data->lock);
-}
-
-/* HWMON sysfs interfaces */
-static ssize_t name_show(struct device *dev, struct device_attribute *devattr,
- char *buf)
-{
- struct abx500_temp *data = dev_get_drvdata(dev);
- /* Show chip name */
- return data->ops.show_name(dev, devattr, buf);
-}
-
-static ssize_t label_show(struct device *dev,
- struct device_attribute *devattr, char *buf)
-{
- struct abx500_temp *data = dev_get_drvdata(dev);
- /* Show each sensor label */
- return data->ops.show_label(dev, devattr, buf);
-}
-
-static ssize_t input_show(struct device *dev,
- struct device_attribute *devattr, char *buf)
-{
- int ret, temp;
- struct abx500_temp *data = dev_get_drvdata(dev);
- struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
- u8 gpadc_addr = data->gpadc_addr[attr->index];
-
- ret = data->ops.read_sensor(data, gpadc_addr, &temp);
- if (ret < 0)
- return ret;
-
- return sprintf(buf, "%d\n", temp);
-}
-
-/* Set functions (RW nodes) */
-static ssize_t min_store(struct device *dev, struct device_attribute *devattr,
- const char *buf, size_t count)
-{
- unsigned long val;
- struct abx500_temp *data = dev_get_drvdata(dev);
- struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
- int res = kstrtol(buf, 10, &val);
- if (res < 0)
- return res;
-
- val = clamp_val(val, 0, DEFAULT_MAX_TEMP);
-
- mutex_lock(&data->lock);
- data->min[attr->index] = val;
- threshold_updated(data);
- mutex_unlock(&data->lock);
-
- return count;
-}
-
-static ssize_t max_store(struct device *dev, struct device_attribute *devattr,
- const char *buf, size_t count)
-{
- unsigned long val;
- struct abx500_temp *data = dev_get_drvdata(dev);
- struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
- int res = kstrtol(buf, 10, &val);
- if (res < 0)
- return res;
-
- val = clamp_val(val, 0, DEFAULT_MAX_TEMP);
-
- mutex_lock(&data->lock);
- data->max[attr->index] = val;
- threshold_updated(data);
- mutex_unlock(&data->lock);
-
- return count;
-}
-
-static ssize_t max_hyst_store(struct device *dev,
- struct device_attribute *devattr,
- const char *buf, size_t count)
-{
- unsigned long val;
- struct abx500_temp *data = dev_get_drvdata(dev);
- struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
- int res = kstrtoul(buf, 10, &val);
- if (res < 0)
- return res;
-
- val = clamp_val(val, 0, DEFAULT_MAX_TEMP);
-
- mutex_lock(&data->lock);
- data->max_hyst[attr->index] = val;
- threshold_updated(data);
- mutex_unlock(&data->lock);
-
- return count;
-}
-
-/* Show functions (RO nodes) */
-static ssize_t min_show(struct device *dev, struct device_attribute *devattr,
- char *buf)
-{
- struct abx500_temp *data = dev_get_drvdata(dev);
- struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-
- return sprintf(buf, "%lu\n", data->min[attr->index]);
-}
-
-static ssize_t max_show(struct device *dev, struct device_attribute *devattr,
- char *buf)
-{
- struct abx500_temp *data = dev_get_drvdata(dev);
- struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-
- return sprintf(buf, "%lu\n", data->max[attr->index]);
-}
-
-static ssize_t max_hyst_show(struct device *dev,
- struct device_attribute *devattr, char *buf)
-{
- struct abx500_temp *data = dev_get_drvdata(dev);
- struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-
- return sprintf(buf, "%lu\n", data->max_hyst[attr->index]);
-}
-
-static ssize_t min_alarm_show(struct device *dev,
- struct device_attribute *devattr, char *buf)
-{
- struct abx500_temp *data = dev_get_drvdata(dev);
- struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-
- return sprintf(buf, "%d\n", data->min_alarm[attr->index]);
-}
-
-static ssize_t max_alarm_show(struct device *dev,
- struct device_attribute *devattr, char *buf)
-{
- struct abx500_temp *data = dev_get_drvdata(dev);
- struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-
- return sprintf(buf, "%d\n", data->max_alarm[attr->index]);
-}
-
-static umode_t abx500_attrs_visible(struct kobject *kobj,
- struct attribute *attr, int n)
-{
- struct device *dev = kobj_to_dev(kobj);
- struct abx500_temp *data = dev_get_drvdata(dev);
-
- if (data->ops.is_visible)
- return data->ops.is_visible(attr, n);
-
- return attr->mode;
-}
-
-/* Chip name, required by hwmon */
-static SENSOR_DEVICE_ATTR_RO(name, name, 0);
-
-/* GPADC - SENSOR1 */
-static SENSOR_DEVICE_ATTR_RO(temp1_label, label, 0);
-static SENSOR_DEVICE_ATTR_RO(temp1_input, input, 0);
-static SENSOR_DEVICE_ATTR_RW(temp1_min, min, 0);
-static SENSOR_DEVICE_ATTR_RW(temp1_max, max, 0);
-static SENSOR_DEVICE_ATTR_RW(temp1_max_hyst, max_hyst, 0);
-static SENSOR_DEVICE_ATTR_RO(temp1_min_alarm, min_alarm, 0);
-static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, max_alarm, 0);
-
-/* GPADC - SENSOR2 */
-static SENSOR_DEVICE_ATTR_RO(temp2_label, label, 1);
-static SENSOR_DEVICE_ATTR_RO(temp2_input, input, 1);
-static SENSOR_DEVICE_ATTR_RW(temp2_min, min, 1);
-static SENSOR_DEVICE_ATTR_RW(temp2_max, max, 1);
-static SENSOR_DEVICE_ATTR_RW(temp2_max_hyst, max_hyst, 1);
-static SENSOR_DEVICE_ATTR_RO(temp2_min_alarm, min_alarm, 1);
-static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, max_alarm, 1);
-
-/* GPADC - SENSOR3 */
-static SENSOR_DEVICE_ATTR_RO(temp3_label, label, 2);
-static SENSOR_DEVICE_ATTR_RO(temp3_input, input, 2);
-static SENSOR_DEVICE_ATTR_RW(temp3_min, min, 2);
-static SENSOR_DEVICE_ATTR_RW(temp3_max, max, 2);
-static SENSOR_DEVICE_ATTR_RW(temp3_max_hyst, max_hyst, 2);
-static SENSOR_DEVICE_ATTR_RO(temp3_min_alarm, min_alarm, 2);
-static SENSOR_DEVICE_ATTR_RO(temp3_max_alarm, max_alarm, 2);
-
-/* GPADC - SENSOR4 */
-static SENSOR_DEVICE_ATTR_RO(temp4_label, label, 3);
-static SENSOR_DEVICE_ATTR_RO(temp4_input, input, 3);
-static SENSOR_DEVICE_ATTR_RW(temp4_min, min, 3);
-static SENSOR_DEVICE_ATTR_RW(temp4_max, max, 3);
-static SENSOR_DEVICE_ATTR_RW(temp4_max_hyst, max_hyst, 3);
-static SENSOR_DEVICE_ATTR_RO(temp4_min_alarm, min_alarm, 3);
-static SENSOR_DEVICE_ATTR_RO(temp4_max_alarm, max_alarm, 3);
-
-static struct attribute *abx500_temp_attributes[] = {
- &sensor_dev_attr_name.dev_attr.attr,
-
- &sensor_dev_attr_temp1_label.dev_attr.attr,
- &sensor_dev_attr_temp1_input.dev_attr.attr,
- &sensor_dev_attr_temp1_min.dev_attr.attr,
- &sensor_dev_attr_temp1_max.dev_attr.attr,
- &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
- &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
- &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
-
- &sensor_dev_attr_temp2_label.dev_attr.attr,
- &sensor_dev_attr_temp2_input.dev_attr.attr,
- &sensor_dev_attr_temp2_min.dev_attr.attr,
- &sensor_dev_attr_temp2_max.dev_attr.attr,
- &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
- &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
- &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
-
- &sensor_dev_attr_temp3_label.dev_attr.attr,
- &sensor_dev_attr_temp3_input.dev_attr.attr,
- &sensor_dev_attr_temp3_min.dev_attr.attr,
- &sensor_dev_attr_temp3_max.dev_attr.attr,
- &sensor_dev_attr_temp3_max_hyst.dev_attr.attr,
- &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
- &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
-
- &sensor_dev_attr_temp4_label.dev_attr.attr,
- &sensor_dev_attr_temp4_input.dev_attr.attr,
- &sensor_dev_attr_temp4_min.dev_attr.attr,
- &sensor_dev_attr_temp4_max.dev_attr.attr,
- &sensor_dev_attr_temp4_max_hyst.dev_attr.attr,
- &sensor_dev_attr_temp4_min_alarm.dev_attr.attr,
- &sensor_dev_attr_temp4_max_alarm.dev_attr.attr,
- NULL
-};
-
-static const struct attribute_group abx500_temp_group = {
- .attrs = abx500_temp_attributes,
- .is_visible = abx500_attrs_visible,
-};
-
-static irqreturn_t abx500_temp_irq_handler(int irq, void *irq_data)
-{
- struct platform_device *pdev = irq_data;
- struct abx500_temp *data = platform_get_drvdata(pdev);
-
- data->ops.irq_handler(irq, data);
- return IRQ_HANDLED;
-}
-
-static int setup_irqs(struct platform_device *pdev)
-{
- int ret;
- int irq = platform_get_irq_byname(pdev, "ABX500_TEMP_WARM");
-
- if (irq < 0) {
- dev_err(&pdev->dev, "Get irq by name failed\n");
- return irq;
- }
-
- ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
- abx500_temp_irq_handler, 0, "abx500-temp", pdev);
- if (ret < 0)
- dev_err(&pdev->dev, "Request threaded irq failed (%d)\n", ret);
-
- return ret;
-}
-
-static int abx500_temp_probe(struct platform_device *pdev)
-{
- struct abx500_temp *data;
- int err;
-
- data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
- if (!data)
- return -ENOMEM;
-
- data->pdev = pdev;
- mutex_init(&data->lock);
-
- /* Chip specific initialization */
- err = abx500_hwmon_init(data);
- if (err < 0 || !data->ops.read_sensor || !data->ops.show_name ||
- !data->ops.show_label)
- return err;
-
- INIT_DEFERRABLE_WORK(&data->work, gpadc_monitor);
-
- platform_set_drvdata(pdev, data);
-
- err = sysfs_create_group(&pdev->dev.kobj, &abx500_temp_group);
- if (err < 0) {
- dev_err(&pdev->dev, "Create sysfs group failed (%d)\n", err);
- return err;
- }
-
- data->hwmon_dev = hwmon_device_register(&pdev->dev);
- if (IS_ERR(data->hwmon_dev)) {
- err = PTR_ERR(data->hwmon_dev);
- dev_err(&pdev->dev, "Class registration failed (%d)\n", err);
- goto exit_sysfs_group;
- }
-
- if (data->ops.irq_handler) {
- err = setup_irqs(pdev);
- if (err < 0)
- goto exit_hwmon_reg;
- }
- return 0;
-
-exit_hwmon_reg:
- hwmon_device_unregister(data->hwmon_dev);
-exit_sysfs_group:
- sysfs_remove_group(&pdev->dev.kobj, &abx500_temp_group);
- return err;
-}
-
-static int abx500_temp_remove(struct platform_device *pdev)
-{
- struct abx500_temp *data = platform_get_drvdata(pdev);
-
- cancel_delayed_work_sync(&data->work);
- hwmon_device_unregister(data->hwmon_dev);
- sysfs_remove_group(&pdev->dev.kobj, &abx500_temp_group);
-
- return 0;
-}
-
-static int abx500_temp_suspend(struct platform_device *pdev,
- pm_message_t state)
-{
- struct abx500_temp *data = platform_get_drvdata(pdev);
-
- if (data->work_active)
- cancel_delayed_work_sync(&data->work);
-
- return 0;
-}
-
-static int abx500_temp_resume(struct platform_device *pdev)
-{
- struct abx500_temp *data = platform_get_drvdata(pdev);
-
- if (data->work_active)
- schedule_monitor(data);
-
- return 0;
-}
-
-#ifdef CONFIG_OF
-static const struct of_device_id abx500_temp_match[] = {
- { .compatible = "stericsson,abx500-temp" },
- {},
-};
-MODULE_DEVICE_TABLE(of, abx500_temp_match);
-#endif
-
-static struct platform_driver abx500_temp_driver = {
- .driver = {
- .name = "abx500-temp",
- .of_match_table = of_match_ptr(abx500_temp_match),
- },
- .suspend = abx500_temp_suspend,
- .resume = abx500_temp_resume,
- .probe = abx500_temp_probe,
- .remove = abx500_temp_remove,
-};
-
-module_platform_driver(abx500_temp_driver);
-
-MODULE_AUTHOR("Martin Persson <martin.persson@stericsson.com>");
-MODULE_DESCRIPTION("ABX500 temperature driver");
-MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.0) at 2024-09-14 21:47:23 +0300