From 50a212ec906f7524620675f0c57357691c26c81f Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 16 Oct 2024 01:20:19 +0000
Subject: [PATCH] 修改GPIO导出默认初始值
---
kernel/drivers/hwmon/hwmon.c | 224 +++++++++++++++++++++++++++++++++++++++++++------------
1 files changed, 175 insertions(+), 49 deletions(-)
diff --git a/kernel/drivers/hwmon/hwmon.c b/kernel/drivers/hwmon/hwmon.c
index c4051a3..045dc3f 100644
--- a/kernel/drivers/hwmon/hwmon.c
+++ b/kernel/drivers/hwmon/hwmon.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* hwmon.c - part of lm_sensors, Linux kernel modules for hardware monitoring
*
* This file defines the sysfs class "hwmon", for use by sensors drivers.
*
* Copyright (C) 2005 Mark M. Hoffman <mhoffman@lightlink.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -18,11 +15,15 @@
#include <linux/gfp.h>
#include <linux/hwmon.h>
#include <linux/idr.h>
+#include <linux/list.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/thermal.h>
+
+#define CREATE_TRACE_POINTS
+#include <trace/events/hwmon.h>
#define HWMON_ID_PREFIX "hwmon"
#define HWMON_ID_FORMAT HWMON_ID_PREFIX "%d"
@@ -31,7 +32,7 @@
const char *name;
struct device dev;
const struct hwmon_chip_info *chip;
-
+ struct list_head tzdata;
struct attribute_group group;
const struct attribute_group **groups;
};
@@ -55,12 +56,12 @@
/*
* Thermal zone information
- * In addition to the reference to the hwmon device,
- * also provides the sensor index.
*/
struct hwmon_thermal_data {
+ struct list_head node; /* hwmon tzdata list entry */
struct device *dev; /* Reference to hwmon device */
int index; /* sensor index */
+ struct thermal_zone_device *tzd;/* thermal zone device */
};
static ssize_t
@@ -134,9 +135,7 @@
* The complex conditional is necessary to avoid a cyclic dependency
* between hwmon and thermal_sys modules.
*/
-#if IS_REACHABLE(CONFIG_THERMAL) && defined(CONFIG_THERMAL_OF) && \
- (!defined(CONFIG_THERMAL_HWMON) || \
- !(defined(MODULE) && IS_MODULE(CONFIG_THERMAL)))
+#ifdef CONFIG_THERMAL_OF
static int hwmon_thermal_get_temp(void *data, int *temp)
{
struct hwmon_thermal_data *tdata = data;
@@ -158,10 +157,17 @@
.get_temp = hwmon_thermal_get_temp,
};
+static void hwmon_thermal_remove_sensor(void *data)
+{
+ list_del(data);
+}
+
static int hwmon_thermal_add_sensor(struct device *dev, int index)
{
+ struct hwmon_device *hwdev = to_hwmon_device(dev);
struct hwmon_thermal_data *tdata;
struct thermal_zone_device *tzd;
+ int err;
tdata = devm_kzalloc(dev, sizeof(*tdata), GFP_KERNEL);
if (!tdata)
@@ -172,21 +178,85 @@
tzd = devm_thermal_zone_of_sensor_register(dev, index, tdata,
&hwmon_thermal_ops);
- /*
- * If CONFIG_THERMAL_OF is disabled, this returns -ENODEV,
- * so ignore that error but forward any other error.
- */
- if (IS_ERR(tzd) && (PTR_ERR(tzd) != -ENODEV))
- return PTR_ERR(tzd);
+ if (IS_ERR(tzd)) {
+ if (PTR_ERR(tzd) != -ENODEV)
+ return PTR_ERR(tzd);
+ dev_info(dev, "temp%d_input not attached to any thermal zone\n",
+ index + 1);
+ devm_kfree(dev, tdata);
+ return 0;
+ }
+
+ err = devm_add_action(dev, hwmon_thermal_remove_sensor, &tdata->node);
+ if (err)
+ return err;
+
+ tdata->tzd = tzd;
+ list_add(&tdata->node, &hwdev->tzdata);
return 0;
}
+
+static int hwmon_thermal_register_sensors(struct device *dev)
+{
+ struct hwmon_device *hwdev = to_hwmon_device(dev);
+ const struct hwmon_chip_info *chip = hwdev->chip;
+ const struct hwmon_channel_info **info = chip->info;
+ void *drvdata = dev_get_drvdata(dev);
+ int i;
+
+ for (i = 1; info[i]; i++) {
+ int j;
+
+ if (info[i]->type != hwmon_temp)
+ continue;
+
+ for (j = 0; info[i]->config[j]; j++) {
+ int err;
+
+ if (!(info[i]->config[j] & HWMON_T_INPUT) ||
+ !chip->ops->is_visible(drvdata, hwmon_temp,
+ hwmon_temp_input, j))
+ continue;
+
+ err = hwmon_thermal_add_sensor(dev, j);
+ if (err)
+ return err;
+ }
+ }
+
+ return 0;
+}
+
+static void hwmon_thermal_notify(struct device *dev, int index)
+{
+ struct hwmon_device *hwdev = to_hwmon_device(dev);
+ struct hwmon_thermal_data *tzdata;
+
+ list_for_each_entry(tzdata, &hwdev->tzdata, node) {
+ if (tzdata->index == index) {
+ thermal_zone_device_update(tzdata->tzd,
+ THERMAL_EVENT_UNSPECIFIED);
+ }
+ }
+}
+
#else
-static int hwmon_thermal_add_sensor(struct device *dev, int index)
+static int hwmon_thermal_register_sensors(struct device *dev)
{
return 0;
}
+
+static void hwmon_thermal_notify(struct device *dev, int index) { }
+
#endif /* IS_REACHABLE(CONFIG_THERMAL) && ... */
+
+static int hwmon_attr_base(enum hwmon_sensor_types type)
+{
+ if (type == hwmon_in || type == hwmon_intrusion)
+ return 0;
+ return 1;
+}
/* sysfs attribute management */
@@ -202,6 +272,9 @@
if (ret < 0)
return ret;
+ trace_hwmon_attr_show(hattr->index + hwmon_attr_base(hattr->type),
+ hattr->name, val);
+
return sprintf(buf, "%ld\n", val);
}
@@ -210,6 +283,7 @@
char *buf)
{
struct hwmon_device_attribute *hattr = to_hwmon_attr(devattr);
+ enum hwmon_sensor_types type = hattr->type;
const char *s;
int ret;
@@ -217,6 +291,9 @@
hattr->index, &s);
if (ret < 0)
return ret;
+
+ trace_hwmon_attr_show_string(hattr->index + hwmon_attr_base(type),
+ hattr->name, s);
return sprintf(buf, "%s\n", s);
}
@@ -238,14 +315,10 @@
if (ret < 0)
return ret;
- return count;
-}
+ trace_hwmon_attr_store(hattr->index + hwmon_attr_base(hattr->type),
+ hattr->name, val);
-static int hwmon_attr_base(enum hwmon_sensor_types type)
-{
- if (type == hwmon_in)
- return 0;
- return 1;
+ return count;
}
static bool is_string_attr(enum hwmon_sensor_types type, u32 attr)
@@ -270,7 +343,7 @@
struct device_attribute *dattr;
struct attribute *a;
umode_t mode;
- char *name;
+ const char *name;
bool is_string = is_string_attr(type, attr);
/* The attribute is invisible if there is no template string */
@@ -281,10 +354,10 @@
if (!mode)
return ERR_PTR(-ENOENT);
- if ((mode & S_IRUGO) && ((is_string && !ops->read_string) ||
+ if ((mode & 0444) && ((is_string && !ops->read_string) ||
(!is_string && !ops->read)))
return ERR_PTR(-EINVAL);
- if ((mode & S_IWUGO) && !ops->write)
+ if ((mode & 0222) && !ops->write)
return ERR_PTR(-EINVAL);
hattr = kzalloc(sizeof(*hattr), GFP_KERNEL);
@@ -292,7 +365,7 @@
return ERR_PTR(-ENOMEM);
if (type == hwmon_chip) {
- name = (char *)template;
+ name = template;
} else {
scnprintf(hattr->name, sizeof(hattr->name), template,
index + hwmon_attr_base(type));
@@ -327,9 +400,15 @@
[hwmon_chip_power_reset_history] = "power_reset_history",
[hwmon_chip_update_interval] = "update_interval",
[hwmon_chip_alarms] = "alarms",
+ [hwmon_chip_samples] = "samples",
+ [hwmon_chip_curr_samples] = "curr_samples",
+ [hwmon_chip_in_samples] = "in_samples",
+ [hwmon_chip_power_samples] = "power_samples",
+ [hwmon_chip_temp_samples] = "temp_samples",
};
static const char * const hwmon_temp_attr_templates[] = {
+ [hwmon_temp_enable] = "temp%d_enable",
[hwmon_temp_input] = "temp%d_input",
[hwmon_temp_type] = "temp%d_type",
[hwmon_temp_lcrit] = "temp%d_lcrit",
@@ -354,9 +433,12 @@
[hwmon_temp_lowest] = "temp%d_lowest",
[hwmon_temp_highest] = "temp%d_highest",
[hwmon_temp_reset_history] = "temp%d_reset_history",
+ [hwmon_temp_rated_min] = "temp%d_rated_min",
+ [hwmon_temp_rated_max] = "temp%d_rated_max",
};
static const char * const hwmon_in_attr_templates[] = {
+ [hwmon_in_enable] = "in%d_enable",
[hwmon_in_input] = "in%d_input",
[hwmon_in_min] = "in%d_min",
[hwmon_in_max] = "in%d_max",
@@ -372,9 +454,12 @@
[hwmon_in_max_alarm] = "in%d_max_alarm",
[hwmon_in_lcrit_alarm] = "in%d_lcrit_alarm",
[hwmon_in_crit_alarm] = "in%d_crit_alarm",
+ [hwmon_in_rated_min] = "in%d_rated_min",
+ [hwmon_in_rated_max] = "in%d_rated_max",
};
static const char * const hwmon_curr_attr_templates[] = {
+ [hwmon_curr_enable] = "curr%d_enable",
[hwmon_curr_input] = "curr%d_input",
[hwmon_curr_min] = "curr%d_min",
[hwmon_curr_max] = "curr%d_max",
@@ -390,9 +475,12 @@
[hwmon_curr_max_alarm] = "curr%d_max_alarm",
[hwmon_curr_lcrit_alarm] = "curr%d_lcrit_alarm",
[hwmon_curr_crit_alarm] = "curr%d_crit_alarm",
+ [hwmon_curr_rated_min] = "curr%d_rated_min",
+ [hwmon_curr_rated_max] = "curr%d_rated_max",
};
static const char * const hwmon_power_attr_templates[] = {
+ [hwmon_power_enable] = "power%d_enable",
[hwmon_power_average] = "power%d_average",
[hwmon_power_average_interval] = "power%d_average_interval",
[hwmon_power_average_interval_max] = "power%d_interval_max",
@@ -421,14 +509,18 @@
[hwmon_power_max_alarm] = "power%d_max_alarm",
[hwmon_power_lcrit_alarm] = "power%d_lcrit_alarm",
[hwmon_power_crit_alarm] = "power%d_crit_alarm",
+ [hwmon_power_rated_min] = "power%d_rated_min",
+ [hwmon_power_rated_max] = "power%d_rated_max",
};
static const char * const hwmon_energy_attr_templates[] = {
+ [hwmon_energy_enable] = "energy%d_enable",
[hwmon_energy_input] = "energy%d_input",
[hwmon_energy_label] = "energy%d_label",
};
static const char * const hwmon_humidity_attr_templates[] = {
+ [hwmon_humidity_enable] = "humidity%d_enable",
[hwmon_humidity_input] = "humidity%d_input",
[hwmon_humidity_label] = "humidity%d_label",
[hwmon_humidity_min] = "humidity%d_min",
@@ -437,9 +529,12 @@
[hwmon_humidity_max_hyst] = "humidity%d_max_hyst",
[hwmon_humidity_alarm] = "humidity%d_alarm",
[hwmon_humidity_fault] = "humidity%d_fault",
+ [hwmon_humidity_rated_min] = "humidity%d_rated_min",
+ [hwmon_humidity_rated_max] = "humidity%d_rated_max",
};
static const char * const hwmon_fan_attr_templates[] = {
+ [hwmon_fan_enable] = "fan%d_enable",
[hwmon_fan_input] = "fan%d_input",
[hwmon_fan_label] = "fan%d_label",
[hwmon_fan_min] = "fan%d_min",
@@ -460,6 +555,11 @@
[hwmon_pwm_freq] = "pwm%d_freq",
};
+static const char * const hwmon_intrusion_attr_templates[] = {
+ [hwmon_intrusion_alarm] = "intrusion%d_alarm",
+ [hwmon_intrusion_beep] = "intrusion%d_beep",
+};
+
static const char * const *__templates[] = {
[hwmon_chip] = hwmon_chip_attrs,
[hwmon_temp] = hwmon_temp_attr_templates,
@@ -470,6 +570,7 @@
[hwmon_humidity] = hwmon_humidity_attr_templates,
[hwmon_fan] = hwmon_fan_attr_templates,
[hwmon_pwm] = hwmon_pwm_attr_templates,
+ [hwmon_intrusion] = hwmon_intrusion_attr_templates,
};
static const int __templates_size[] = {
@@ -482,7 +583,37 @@
[hwmon_humidity] = ARRAY_SIZE(hwmon_humidity_attr_templates),
[hwmon_fan] = ARRAY_SIZE(hwmon_fan_attr_templates),
[hwmon_pwm] = ARRAY_SIZE(hwmon_pwm_attr_templates),
+ [hwmon_intrusion] = ARRAY_SIZE(hwmon_intrusion_attr_templates),
};
+
+int hwmon_notify_event(struct device *dev, enum hwmon_sensor_types type,
+ u32 attr, int channel)
+{
+ char sattr[MAX_SYSFS_ATTR_NAME_LENGTH];
+ const char * const *templates;
+ const char *template;
+ int base;
+
+ if (type >= ARRAY_SIZE(__templates))
+ return -EINVAL;
+ if (attr >= __templates_size[type])
+ return -EINVAL;
+
+ templates = __templates[type];
+ template = templates[attr];
+
+ base = hwmon_attr_base(type);
+
+ scnprintf(sattr, MAX_SYSFS_ATTR_NAME_LENGTH, template, base + channel);
+ sysfs_notify(&dev->kobj, NULL, sattr);
+ kobject_uevent(&dev->kobj, KOBJ_CHANGE);
+
+ if (type == hwmon_temp)
+ hwmon_thermal_notify(dev, channel);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(hwmon_notify_event);
static int hwmon_num_channel_attrs(const struct hwmon_channel_info *info)
{
@@ -569,7 +700,8 @@
{
struct hwmon_device *hwdev;
struct device *hdev;
- int i, j, err, id;
+ struct device *tdev = dev;
+ int i, err, id;
/* Complain about invalid characters in hwmon name attribute */
if (name && (!strlen(name) || strpbrk(name, "-* \t\n")))
@@ -626,7 +758,9 @@
hwdev->name = name;
hdev->class = &hwmon_class;
hdev->parent = dev;
- hdev->of_node = dev ? dev->of_node : NULL;
+ while (tdev && !tdev->of_node)
+ tdev = tdev->parent;
+ hdev->of_node = tdev ? tdev->of_node : NULL;
hwdev->chip = chip;
dev_set_drvdata(hdev, drvdata);
dev_set_name(hdev, HWMON_ID_FORMAT, id);
@@ -636,27 +770,19 @@
goto ida_remove;
}
- if (dev && dev->of_node && chip && chip->ops->read &&
+ INIT_LIST_HEAD(&hwdev->tzdata);
+
+ if (hdev->of_node && chip && chip->ops->read &&
chip->info[0]->type == hwmon_chip &&
(chip->info[0]->config[0] & HWMON_C_REGISTER_TZ)) {
- const struct hwmon_channel_info **info = chip->info;
-
- for (i = 1; info[i]; i++) {
- if (info[i]->type != hwmon_temp)
- continue;
-
- for (j = 0; info[i]->config[j]; j++) {
- if (!chip->ops->is_visible(drvdata, hwmon_temp,
- hwmon_temp_input, j))
- continue;
- if (info[i]->config[j] & HWMON_T_INPUT) {
- err = hwmon_thermal_add_sensor(hdev, j);
- if (err) {
- device_unregister(hdev);
- goto ida_remove;
- }
- }
- }
+ err = hwmon_thermal_register_sensors(hdev);
+ if (err) {
+ device_unregister(hdev);
+ /*
+ * Don't worry about hwdev; hwmon_dev_release(), called
+ * from device_unregister(), will free it.
+ */
+ goto ida_remove;
}
}
--
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