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linux/drivers/hwmon/sch5636.c
Armin Wolf 2be5f0d753 hwmon: (sch56xx) Use devres functions for watchdog 
Use devm_kzalloc()/devm_watchdog_register() for
watchdog registration since it allows us to remove
the sch56xx_watchdog_data struct from the drivers
own data structs.
Remove sch56xx_watchdog_unregister since devres
takes care of that now.

Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20210508131457.12780-2-W_Armin@gmx.de
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
[groeck: Dropped unnecessary return; at end of void function]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2021-06-17 04:21:44 -07:00

517 lines
14 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
/***************************************************************************
* Copyright (C) 2011-2012 Hans de Goede <hdegoede@redhat.com> *
* *
***************************************************************************/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/platform_device.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include "sch56xx-common.h"
#define DRVNAME "sch5636"
#define DEVNAME "theseus" /* We only support one model for now */
#define SCH5636_REG_FUJITSU_ID 0x780
#define SCH5636_REG_FUJITSU_REV 0x783
#define SCH5636_NO_INS 5
#define SCH5636_NO_TEMPS 16
#define SCH5636_NO_FANS 8
static const u16 SCH5636_REG_IN_VAL[SCH5636_NO_INS] = {
0x22, 0x23, 0x24, 0x25, 0x189 };
static const u16 SCH5636_REG_IN_FACTORS[SCH5636_NO_INS] = {
4400, 1500, 4000, 4400, 16000 };
static const char * const SCH5636_IN_LABELS[SCH5636_NO_INS] = {
"3.3V", "VREF", "VBAT", "3.3AUX", "12V" };
static const u16 SCH5636_REG_TEMP_VAL[SCH5636_NO_TEMPS] = {
0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181,
0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C };
#define SCH5636_REG_TEMP_CTRL(i) (0x790 + (i))
#define SCH5636_TEMP_WORKING 0x01
#define SCH5636_TEMP_ALARM 0x02
#define SCH5636_TEMP_DEACTIVATED 0x80
static const u16 SCH5636_REG_FAN_VAL[SCH5636_NO_FANS] = {
0x2C, 0x2E, 0x30, 0x32, 0x62, 0x64, 0x66, 0x68 };
#define SCH5636_REG_FAN_CTRL(i) (0x880 + (i))
/* FAULT in datasheet, but acts as an alarm */
#define SCH5636_FAN_ALARM 0x04
#define SCH5636_FAN_NOT_PRESENT 0x08
#define SCH5636_FAN_DEACTIVATED 0x80
struct sch5636_data {
unsigned short addr;
struct device *hwmon_dev;
struct mutex update_lock;
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
u8 in[SCH5636_NO_INS];
u8 temp_val[SCH5636_NO_TEMPS];
u8 temp_ctrl[SCH5636_NO_TEMPS];
u16 fan_val[SCH5636_NO_FANS];
u8 fan_ctrl[SCH5636_NO_FANS];
};
static struct sch5636_data *sch5636_update_device(struct device *dev)
{
struct sch5636_data *data = dev_get_drvdata(dev);
struct sch5636_data *ret = data;
int i, val;
mutex_lock(&data->update_lock);
/* Cache the values for 1 second */
if (data->valid && !time_after(jiffies, data->last_updated + HZ))
goto abort;
for (i = 0; i < SCH5636_NO_INS; i++) {
val = sch56xx_read_virtual_reg(data->addr,
SCH5636_REG_IN_VAL[i]);
if (unlikely(val < 0)) {
ret = ERR_PTR(val);
goto abort;
}
data->in[i] = val;
}
for (i = 0; i < SCH5636_NO_TEMPS; i++) {
if (data->temp_ctrl[i] & SCH5636_TEMP_DEACTIVATED)
continue;
val = sch56xx_read_virtual_reg(data->addr,
SCH5636_REG_TEMP_VAL[i]);
if (unlikely(val < 0)) {
ret = ERR_PTR(val);
goto abort;
}
data->temp_val[i] = val;
val = sch56xx_read_virtual_reg(data->addr,
SCH5636_REG_TEMP_CTRL(i));
if (unlikely(val < 0)) {
ret = ERR_PTR(val);
goto abort;
}
data->temp_ctrl[i] = val;
/* Alarms need to be explicitly write-cleared */
if (val & SCH5636_TEMP_ALARM) {
sch56xx_write_virtual_reg(data->addr,
SCH5636_REG_TEMP_CTRL(i), val);
}
}
for (i = 0; i < SCH5636_NO_FANS; i++) {
if (data->fan_ctrl[i] & SCH5636_FAN_DEACTIVATED)
continue;
val = sch56xx_read_virtual_reg16(data->addr,
SCH5636_REG_FAN_VAL[i]);
if (unlikely(val < 0)) {
ret = ERR_PTR(val);
goto abort;
}
data->fan_val[i] = val;
val = sch56xx_read_virtual_reg(data->addr,
SCH5636_REG_FAN_CTRL(i));
if (unlikely(val < 0)) {
ret = ERR_PTR(val);
goto abort;
}
data->fan_ctrl[i] = val;
/* Alarms need to be explicitly write-cleared */
if (val & SCH5636_FAN_ALARM) {
sch56xx_write_virtual_reg(data->addr,
SCH5636_REG_FAN_CTRL(i), val);
}
}
data->last_updated = jiffies;
data->valid = 1;
abort:
mutex_unlock(&data->update_lock);
return ret;
}
static int reg_to_rpm(u16 reg)
{
if (reg == 0)
return -EIO;
if (reg == 0xffff)
return 0;
return 5400540 / reg;
}
static ssize_t name_show(struct device *dev, struct device_attribute *devattr,
char *buf)
{
return sysfs_emit(buf, "%s\n", DEVNAME);
}
static ssize_t in_value_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5636_data *data = sch5636_update_device(dev);
int val;
if (IS_ERR(data))
return PTR_ERR(data);
val = DIV_ROUND_CLOSEST(
data->in[attr->index] * SCH5636_REG_IN_FACTORS[attr->index],
255);
return sysfs_emit(buf, "%d\n", val);
}
static ssize_t in_label_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
return sysfs_emit(buf, "%s\n",
SCH5636_IN_LABELS[attr->index]);
}
static ssize_t temp_value_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5636_data *data = sch5636_update_device(dev);
int val;
if (IS_ERR(data))
return PTR_ERR(data);
val = (data->temp_val[attr->index] - 64) * 1000;
return sysfs_emit(buf, "%d\n", val);
}
static ssize_t temp_fault_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5636_data *data = sch5636_update_device(dev);
int val;
if (IS_ERR(data))
return PTR_ERR(data);
val = (data->temp_ctrl[attr->index] & SCH5636_TEMP_WORKING) ? 0 : 1;
return sysfs_emit(buf, "%d\n", val);
}
static ssize_t temp_alarm_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5636_data *data = sch5636_update_device(dev);
int val;
if (IS_ERR(data))
return PTR_ERR(data);
val = (data->temp_ctrl[attr->index] & SCH5636_TEMP_ALARM) ? 1 : 0;
return sysfs_emit(buf, "%d\n", val);
}
static ssize_t fan_value_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5636_data *data = sch5636_update_device(dev);
int val;
if (IS_ERR(data))
return PTR_ERR(data);
val = reg_to_rpm(data->fan_val[attr->index]);
if (val < 0)
return val;
return sysfs_emit(buf, "%d\n", val);
}
static ssize_t fan_fault_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5636_data *data = sch5636_update_device(dev);
int val;
if (IS_ERR(data))
return PTR_ERR(data);
val = (data->fan_ctrl[attr->index] & SCH5636_FAN_NOT_PRESENT) ? 1 : 0;
return sysfs_emit(buf, "%d\n", val);
}
static ssize_t fan_alarm_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5636_data *data = sch5636_update_device(dev);
int val;
if (IS_ERR(data))
return PTR_ERR(data);
val = (data->fan_ctrl[attr->index] & SCH5636_FAN_ALARM) ? 1 : 0;
return sysfs_emit(buf, "%d\n", val);
}
static struct sensor_device_attribute sch5636_attr[] = {
SENSOR_ATTR_RO(name, name, 0),
SENSOR_ATTR_RO(in0_input, in_value, 0),
SENSOR_ATTR_RO(in0_label, in_label, 0),
SENSOR_ATTR_RO(in1_input, in_value, 1),
SENSOR_ATTR_RO(in1_label, in_label, 1),
SENSOR_ATTR_RO(in2_input, in_value, 2),
SENSOR_ATTR_RO(in2_label, in_label, 2),
SENSOR_ATTR_RO(in3_input, in_value, 3),
SENSOR_ATTR_RO(in3_label, in_label, 3),
SENSOR_ATTR_RO(in4_input, in_value, 4),
SENSOR_ATTR_RO(in4_label, in_label, 4),
};
static struct sensor_device_attribute sch5636_temp_attr[] = {
SENSOR_ATTR_RO(temp1_input, temp_value, 0),
SENSOR_ATTR_RO(temp1_fault, temp_fault, 0),
SENSOR_ATTR_RO(temp1_alarm, temp_alarm, 0),
SENSOR_ATTR_RO(temp2_input, temp_value, 1),
SENSOR_ATTR_RO(temp2_fault, temp_fault, 1),
SENSOR_ATTR_RO(temp2_alarm, temp_alarm, 1),
SENSOR_ATTR_RO(temp3_input, temp_value, 2),
SENSOR_ATTR_RO(temp3_fault, temp_fault, 2),
SENSOR_ATTR_RO(temp3_alarm, temp_alarm, 2),
SENSOR_ATTR_RO(temp4_input, temp_value, 3),
SENSOR_ATTR_RO(temp4_fault, temp_fault, 3),
SENSOR_ATTR_RO(temp4_alarm, temp_alarm, 3),
SENSOR_ATTR_RO(temp5_input, temp_value, 4),
SENSOR_ATTR_RO(temp5_fault, temp_fault, 4),
SENSOR_ATTR_RO(temp5_alarm, temp_alarm, 4),
SENSOR_ATTR_RO(temp6_input, temp_value, 5),
SENSOR_ATTR_RO(temp6_fault, temp_fault, 5),
SENSOR_ATTR_RO(temp6_alarm, temp_alarm, 5),
SENSOR_ATTR_RO(temp7_input, temp_value, 6),
SENSOR_ATTR_RO(temp7_fault, temp_fault, 6),
SENSOR_ATTR_RO(temp7_alarm, temp_alarm, 6),
SENSOR_ATTR_RO(temp8_input, temp_value, 7),
SENSOR_ATTR_RO(temp8_fault, temp_fault, 7),
SENSOR_ATTR_RO(temp8_alarm, temp_alarm, 7),
SENSOR_ATTR_RO(temp9_input, temp_value, 8),
SENSOR_ATTR_RO(temp9_fault, temp_fault, 8),
SENSOR_ATTR_RO(temp9_alarm, temp_alarm, 8),
SENSOR_ATTR_RO(temp10_input, temp_value, 9),
SENSOR_ATTR_RO(temp10_fault, temp_fault, 9),
SENSOR_ATTR_RO(temp10_alarm, temp_alarm, 9),
SENSOR_ATTR_RO(temp11_input, temp_value, 10),
SENSOR_ATTR_RO(temp11_fault, temp_fault, 10),
SENSOR_ATTR_RO(temp11_alarm, temp_alarm, 10),
SENSOR_ATTR_RO(temp12_input, temp_value, 11),
SENSOR_ATTR_RO(temp12_fault, temp_fault, 11),
SENSOR_ATTR_RO(temp12_alarm, temp_alarm, 11),
SENSOR_ATTR_RO(temp13_input, temp_value, 12),
SENSOR_ATTR_RO(temp13_fault, temp_fault, 12),
SENSOR_ATTR_RO(temp13_alarm, temp_alarm, 12),
SENSOR_ATTR_RO(temp14_input, temp_value, 13),
SENSOR_ATTR_RO(temp14_fault, temp_fault, 13),
SENSOR_ATTR_RO(temp14_alarm, temp_alarm, 13),
SENSOR_ATTR_RO(temp15_input, temp_value, 14),
SENSOR_ATTR_RO(temp15_fault, temp_fault, 14),
SENSOR_ATTR_RO(temp15_alarm, temp_alarm, 14),
SENSOR_ATTR_RO(temp16_input, temp_value, 15),
SENSOR_ATTR_RO(temp16_fault, temp_fault, 15),
SENSOR_ATTR_RO(temp16_alarm, temp_alarm, 15),
};
static struct sensor_device_attribute sch5636_fan_attr[] = {
SENSOR_ATTR_RO(fan1_input, fan_value, 0),
SENSOR_ATTR_RO(fan1_fault, fan_fault, 0),
SENSOR_ATTR_RO(fan1_alarm, fan_alarm, 0),
SENSOR_ATTR_RO(fan2_input, fan_value, 1),
SENSOR_ATTR_RO(fan2_fault, fan_fault, 1),
SENSOR_ATTR_RO(fan2_alarm, fan_alarm, 1),
SENSOR_ATTR_RO(fan3_input, fan_value, 2),
SENSOR_ATTR_RO(fan3_fault, fan_fault, 2),
SENSOR_ATTR_RO(fan3_alarm, fan_alarm, 2),
SENSOR_ATTR_RO(fan4_input, fan_value, 3),
SENSOR_ATTR_RO(fan4_fault, fan_fault, 3),
SENSOR_ATTR_RO(fan4_alarm, fan_alarm, 3),
SENSOR_ATTR_RO(fan5_input, fan_value, 4),
SENSOR_ATTR_RO(fan5_fault, fan_fault, 4),
SENSOR_ATTR_RO(fan5_alarm, fan_alarm, 4),
SENSOR_ATTR_RO(fan6_input, fan_value, 5),
SENSOR_ATTR_RO(fan6_fault, fan_fault, 5),
SENSOR_ATTR_RO(fan6_alarm, fan_alarm, 5),
SENSOR_ATTR_RO(fan7_input, fan_value, 6),
SENSOR_ATTR_RO(fan7_fault, fan_fault, 6),
SENSOR_ATTR_RO(fan7_alarm, fan_alarm, 6),
SENSOR_ATTR_RO(fan8_input, fan_value, 7),
SENSOR_ATTR_RO(fan8_fault, fan_fault, 7),
SENSOR_ATTR_RO(fan8_alarm, fan_alarm, 7),
};
static int sch5636_remove(struct platform_device *pdev)
{
struct sch5636_data *data = platform_get_drvdata(pdev);
int i;
if (data->hwmon_dev)
hwmon_device_unregister(data->hwmon_dev);
for (i = 0; i < ARRAY_SIZE(sch5636_attr); i++)
device_remove_file(&pdev->dev, &sch5636_attr[i].dev_attr);
for (i = 0; i < SCH5636_NO_TEMPS * 3; i++)
device_remove_file(&pdev->dev,
&sch5636_temp_attr[i].dev_attr);
for (i = 0; i < SCH5636_NO_FANS * 3; i++)
device_remove_file(&pdev->dev,
&sch5636_fan_attr[i].dev_attr);
return 0;
}
static int sch5636_probe(struct platform_device *pdev)
{
struct sch5636_data *data;
int i, err, val, revision[2];
char id[4];
data = devm_kzalloc(&pdev->dev, sizeof(struct sch5636_data),
GFP_KERNEL);
if (!data)
return -ENOMEM;
data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
mutex_init(&data->update_lock);
platform_set_drvdata(pdev, data);
for (i = 0; i < 3; i++) {
val = sch56xx_read_virtual_reg(data->addr,
SCH5636_REG_FUJITSU_ID + i);
if (val < 0) {
pr_err("Could not read Fujitsu id byte at %#x\n",
SCH5636_REG_FUJITSU_ID + i);
err = val;
goto error;
}
id[i] = val;
}
id[i] = '\0';
if (strcmp(id, "THS")) {
pr_err("Unknown Fujitsu id: %02x%02x%02x\n",
id[0], id[1], id[2]);
err = -ENODEV;
goto error;
}
for (i = 0; i < 2; i++) {
val = sch56xx_read_virtual_reg(data->addr,
SCH5636_REG_FUJITSU_REV + i);
if (val < 0) {
err = val;
goto error;
}
revision[i] = val;
}
pr_info("Found %s chip at %#hx, revision: %d.%02d\n", DEVNAME,
data->addr, revision[0], revision[1]);
/* Read all temp + fan ctrl registers to determine which are active */
for (i = 0; i < SCH5636_NO_TEMPS; i++) {
val = sch56xx_read_virtual_reg(data->addr,
SCH5636_REG_TEMP_CTRL(i));
if (unlikely(val < 0)) {
err = val;
goto error;
}
data->temp_ctrl[i] = val;
}
for (i = 0; i < SCH5636_NO_FANS; i++) {
val = sch56xx_read_virtual_reg(data->addr,
SCH5636_REG_FAN_CTRL(i));
if (unlikely(val < 0)) {
err = val;
goto error;
}
data->fan_ctrl[i] = val;
}
for (i = 0; i < ARRAY_SIZE(sch5636_attr); i++) {
err = device_create_file(&pdev->dev,
&sch5636_attr[i].dev_attr);
if (err)
goto error;
}
for (i = 0; i < (SCH5636_NO_TEMPS * 3); i++) {
if (data->temp_ctrl[i/3] & SCH5636_TEMP_DEACTIVATED)
continue;
err = device_create_file(&pdev->dev,
&sch5636_temp_attr[i].dev_attr);
if (err)
goto error;
}
for (i = 0; i < (SCH5636_NO_FANS * 3); i++) {
if (data->fan_ctrl[i/3] & SCH5636_FAN_DEACTIVATED)
continue;
err = device_create_file(&pdev->dev,
&sch5636_fan_attr[i].dev_attr);
if (err)
goto error;
}
data->hwmon_dev = hwmon_device_register(&pdev->dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
data->hwmon_dev = NULL;
goto error;
}
/* Note failing to register the watchdog is not a fatal error */
sch56xx_watchdog_register(&pdev->dev, data->addr, (revision[0] << 8) | revision[1],
&data->update_lock, 0);
return 0;
error:
sch5636_remove(pdev);
return err;
}
static struct platform_driver sch5636_driver = {
.driver = {
.name = DRVNAME,
},
.probe = sch5636_probe,
.remove = sch5636_remove,
};
module_platform_driver(sch5636_driver);
MODULE_DESCRIPTION("SMSC SCH5636 Hardware Monitoring Driver");
MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
MODULE_LICENSE("GPL");
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