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Merge "drivers: thermal: Add config sysfs entry support for thermal zones"

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qctecmdr 2020-01-14 22:59:14 -08:00 • committed by Gerrit - the friendly Code Review server
commit 9195ca3327
1 changed files with 148 additions and 1 deletions
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149
drivers/thermal/thermal_sysfs.c
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@ -8,7 +8,7 @@
* Copyright (C) 2008 Intel Corp
* Copyright (C) 2008 Zhang Rui <rui.zhang@intel.com>
* Copyright (C) 2008 Sujith Thomas <sujith.thomas@intel.com>
* Copyright (c) 2019, The Linux Foundation. All rights reserved.
* Copyright (c) 2019-2020, The Linux Foundation. All rights reserved.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@ -24,6 +24,147 @@
/* sys I/F for thermal zone */
#ifdef CONFIG_QTI_THERMAL
#define UINT_MAX_CHARACTER 11
static int fetch_and_populate(char *buf, struct thermal_zone_device *tz,
int idx, int offset, size_t size, bool is_hyst)
{
int ret = 0, temp;
if (!is_hyst)
ret = tz->ops->get_trip_temp(tz, idx, &temp);
else
ret = tz->ops->get_trip_hyst(tz, idx, &temp);
if (ret)
return ret;
offset += scnprintf(buf + offset, size - offset, "%d ", temp);
return offset;
}
static ssize_t
config_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct thermal_zone_device *tz = to_thermal_zone(dev);
int offset = 0, ret, i;
size_t buf_size = 0;
int buf_offset = 0, buf1_offset = 0, buf2_offset = 0;
char *buf_temp = NULL, *buf_hyst = NULL, *buf_trip = NULL;
char *buf_cdev = NULL, *buf_cdev_upper = NULL, *buf_cdev_lower = NULL;
struct thermal_instance *instance;
offset += scnprintf(buf + offset, PAGE_SIZE - offset, "sensor %s\n",
tz->type);
offset += scnprintf(buf + offset, PAGE_SIZE - offset, "policy %s\n",
tz->governor->name);
offset += scnprintf(buf + offset, PAGE_SIZE - offset,
"polling_delay %d\n", tz->polling_delay);
offset += scnprintf(buf + offset, PAGE_SIZE - offset,
"passive_polling_delay %d\n",
tz->passive_delay);
if (!tz->trips || !tz->ops->get_trip_temp)
return offset;
buf_size = tz->trips * UINT_MAX_CHARACTER;
buf_temp = kzalloc(buf_size, GFP_KERNEL);
buf_hyst = kzalloc(buf_size, GFP_KERNEL);
buf_trip = kzalloc(buf_size, GFP_KERNEL);
for (i = 0; i < tz->trips; i++) {
buf_offset = scnprintf(buf_trip + buf_offset,
buf_size - buf_offset, "%d ", i);
ret = fetch_and_populate(buf_temp, tz, i, buf1_offset,
buf_size, false);
if (ret < 0)
goto config_exit;
buf1_offset = ret;
if (!tz->ops->get_trip_hyst)
continue;
ret = fetch_and_populate(buf_hyst, tz, i, buf2_offset,
buf_size, true);
if (ret < 0)
goto config_exit;
buf2_offset = ret;
}
offset += scnprintf(buf + offset, PAGE_SIZE - offset,
"trip %s\n", buf_trip);
offset += scnprintf(buf + offset, PAGE_SIZE - offset,
"trip_threshold %s\n", buf_temp);
if (buf2_offset)
offset += scnprintf(buf + offset, PAGE_SIZE - offset,
"trip_threshold_clr %s\n", buf_hyst);
buf_size = 0;
buf_offset = 0;
buf1_offset = 0;
buf2_offset = 0;
list_for_each_entry(instance, &tz->thermal_instances, tz_node) {
if (instance->cdev)
buf_size++;
}
if (!buf_size)
goto config_exit;
buf_size *= THERMAL_NAME_LENGTH;
buf_cdev = kzalloc(buf_size, GFP_KERNEL);
buf_cdev_upper = kzalloc(buf_size, GFP_KERNEL);
buf_cdev_lower = kzalloc(buf_size, GFP_KERNEL);
for (i = 0; i < tz->trips; i++) {
bool first_entry = true;
list_for_each_entry(instance, &tz->thermal_instances, tz_node) {
if (!instance->cdev || instance->trip != i)
continue;
if (first_entry) {
first_entry = false;
buf_offset += scnprintf(
buf_cdev + buf_offset,
buf_size - buf_offset,
" %s", instance->cdev->type);
buf1_offset += scnprintf(
buf_cdev_upper + buf1_offset,
buf_size - buf1_offset,
" %d", instance->upper);
buf2_offset += scnprintf(
buf_cdev_lower + buf2_offset,
buf_size - buf2_offset,
" %d", instance->lower);
} else {
buf_offset += scnprintf(
buf_cdev + buf_offset,
buf_size - buf_offset,
"+%s", instance->cdev->type);
buf1_offset += scnprintf(
buf_cdev_upper + buf1_offset,
buf_size - buf1_offset,
"+%d", instance->upper);
buf2_offset += scnprintf(
buf_cdev_lower + buf2_offset,
buf_size - buf2_offset,
"+%d", instance->lower);
}
}
}
offset += scnprintf(buf + offset, PAGE_SIZE - offset,
"device %s\n", buf_cdev);
offset += scnprintf(buf + offset, PAGE_SIZE - offset,
"upper_limit %s\n", buf_cdev_upper);
offset += scnprintf(buf + offset, PAGE_SIZE - offset,
"lower_limit %s\n", buf_cdev_lower);
config_exit:
kfree(buf_trip);
kfree(buf_temp);
kfree(buf_hyst);
kfree(buf_cdev);
kfree(buf_cdev_upper);
kfree(buf_cdev_lower);
return (ret < 0) ? ret : offset;
}
#endif
static ssize_t
type_show(struct device *dev, struct device_attribute *attr, char *buf)
{
@ -424,6 +565,9 @@ create_s32_tzp_attr(offset);
* present on the sysfs interface.
*/
static DEVICE_ATTR_RO(type);
#if IS_ENABLED(CONFIG_QTI_THERMAL)
static DEVICE_ATTR_RO(config);
#endif
static DEVICE_ATTR_RO(temp);
static DEVICE_ATTR_RW(policy);
static DEVICE_ATTR_RO(available_policies);
@ -436,6 +580,9 @@ static DEVICE_ATTR_RW(passive);
/* These attributes are unconditionally added to a thermal zone */
static struct attribute *thermal_zone_dev_attrs[] = {
&dev_attr_type.attr,
#if IS_ENABLED(CONFIG_QTI_THERMAL)
&dev_attr_config.attr,
#endif
&dev_attr_temp.attr,
#if (IS_ENABLED(CONFIG_THERMAL_EMULATION))
&dev_attr_emul_temp.attr,