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Diffstat (limited to 'drivers/hwmon/smsc47b397.c')
-rw-r--r--drivers/hwmon/smsc47b397.c378
1 files changed, 225 insertions, 153 deletions
diff --git a/drivers/hwmon/smsc47b397.c b/drivers/hwmon/smsc47b397.c
index 2a3e21b5b6b..bd89e87bd6a 100644
--- a/drivers/hwmon/smsc47b397.c
+++ b/drivers/hwmon/smsc47b397.c
@@ -1,44 +1,53 @@
/*
- smsc47b397.c - Part of lm_sensors, Linux kernel modules
- for hardware monitoring
-
- Supports the SMSC LPC47B397-NC Super-I/O chip.
-
- Author/Maintainer: Mark M. Hoffman <mhoffman@lightlink.com>
- Copyright (C) 2004 Utilitek Systems, Inc.
-
- derived in part from smsc47m1.c:
- Copyright (C) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com>
- Copyright (C) 2004 Jean Delvare <khali@linux-fr.org>
-
- 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; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
+ * smsc47b397.c - Part of lm_sensors, Linux kernel modules
+ * for hardware monitoring
+ *
+ * Supports the SMSC LPC47B397-NC Super-I/O chip.
+ *
+ * Author/Maintainer: Mark M. Hoffman <mhoffman@lightlink.com>
+ * Copyright (C) 2004 Utilitek Systems, Inc.
+ *
+ * derived in part from smsc47m1.c:
+ * Copyright (C) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com>
+ * Copyright (C) 2004 Jean Delvare <jdelvare@suse.de>
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <linux/jiffies.h>
-#include <linux/i2c.h>
-#include <linux/i2c-isa.h>
+#include <linux/platform_device.h>
#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/init.h>
-#include <asm/io.h>
+#include <linux/mutex.h>
+#include <linux/acpi.h>
+#include <linux/io.h>
-/* Address is autodetected, there is no default value */
-static unsigned short address;
+static unsigned short force_id;
+module_param(force_id, ushort, 0);
+MODULE_PARM_DESC(force_id, "Override the detected device ID");
+
+static struct platform_device *pdev;
+
+#define DRVNAME "smsc47b397"
/* Super-I/0 registers and commands */
@@ -90,11 +99,12 @@ static u8 smsc47b397_reg_temp[] = {0x25, 0x26, 0x27, 0x80};
#define SMSC47B397_REG_FAN_MSB(nr) (0x29 + 2 * (nr))
struct smsc47b397_data {
- struct i2c_client client;
- struct class_device *class_dev;
- struct semaphore lock;
+ unsigned short addr;
+ const char *name;
+ struct device *hwmon_dev;
+ struct mutex lock;
- struct semaphore update_lock;
+ struct mutex update_lock;
unsigned long last_updated; /* in jiffies */
int valid;
@@ -103,202 +113,247 @@ struct smsc47b397_data {
u8 temp[4];
};
-static int smsc47b397_read_value(struct i2c_client *client, u8 reg)
+static int smsc47b397_read_value(struct smsc47b397_data *data, u8 reg)
{
- struct smsc47b397_data *data = i2c_get_clientdata(client);
int res;
- down(&data->lock);
- outb(reg, client->addr);
- res = inb_p(client->addr + 1);
- up(&data->lock);
+ mutex_lock(&data->lock);
+ outb(reg, data->addr);
+ res = inb_p(data->addr + 1);
+ mutex_unlock(&data->lock);
return res;
}
static struct smsc47b397_data *smsc47b397_update_device(struct device *dev)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct smsc47b397_data *data = i2c_get_clientdata(client);
+ struct smsc47b397_data *data = dev_get_drvdata(dev);
int i;
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
- dev_dbg(&client->dev, "starting device update...\n");
+ dev_dbg(dev, "starting device update...\n");
/* 4 temperature inputs, 4 fan inputs */
for (i = 0; i < 4; i++) {
- data->temp[i] = smsc47b397_read_value(client,
+ data->temp[i] = smsc47b397_read_value(data,
SMSC47B397_REG_TEMP(i));
/* must read LSB first */
- data->fan[i] = smsc47b397_read_value(client,
+ data->fan[i] = smsc47b397_read_value(data,
SMSC47B397_REG_FAN_LSB(i));
- data->fan[i] |= smsc47b397_read_value(client,
+ data->fan[i] |= smsc47b397_read_value(data,
SMSC47B397_REG_FAN_MSB(i)) << 8;
}
data->last_updated = jiffies;
data->valid = 1;
- dev_dbg(&client->dev, "... device update complete\n");
+ dev_dbg(dev, "... device update complete\n");
}
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return data;
}
-/* TEMP: 0.001C/bit (-128C to +127C)
- REG: 1C/bit, two's complement */
+/*
+ * TEMP: 0.001C/bit (-128C to +127C)
+ * REG: 1C/bit, two's complement
+ */
static int temp_from_reg(u8 reg)
{
return (s8)reg * 1000;
}
-/* 0 <= nr <= 3 */
-static ssize_t show_temp(struct device *dev, char *buf, int nr)
+static ssize_t show_temp(struct device *dev, struct device_attribute
+ *devattr, char *buf)
{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct smsc47b397_data *data = smsc47b397_update_device(dev);
- return sprintf(buf, "%d\n", temp_from_reg(data->temp[nr]));
+ return sprintf(buf, "%d\n", temp_from_reg(data->temp[attr->index]));
}
-#define sysfs_temp(num) \
-static ssize_t show_temp##num(struct device *dev, struct device_attribute *attr, char *buf) \
-{ \
- return show_temp(dev, buf, num-1); \
-} \
-static DEVICE_ATTR(temp##num##_input, S_IRUGO, show_temp##num, NULL)
-
-sysfs_temp(1);
-sysfs_temp(2);
-sysfs_temp(3);
-sysfs_temp(4);
+static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
+static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
+static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
+static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
-#define device_create_file_temp(client, num) \
- device_create_file(&client->dev, &dev_attr_temp##num##_input)
-
-/* FAN: 1 RPM/bit
- REG: count of 90kHz pulses / revolution */
+/*
+ * FAN: 1 RPM/bit
+ * REG: count of 90kHz pulses / revolution
+ */
static int fan_from_reg(u16 reg)
{
+ if (reg == 0 || reg == 0xffff)
+ return 0;
return 90000 * 60 / reg;
}
-/* 0 <= nr <= 3 */
-static ssize_t show_fan(struct device *dev, char *buf, int nr)
+static ssize_t show_fan(struct device *dev, struct device_attribute
+ *devattr, char *buf)
{
- struct smsc47b397_data *data = smsc47b397_update_device(dev);
- return sprintf(buf, "%d\n", fan_from_reg(data->fan[nr]));
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct smsc47b397_data *data = smsc47b397_update_device(dev);
+ return sprintf(buf, "%d\n", fan_from_reg(data->fan[attr->index]));
}
+static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
+static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
+static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
+static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
-#define sysfs_fan(num) \
-static ssize_t show_fan##num(struct device *dev, struct device_attribute *attr, char *buf) \
-{ \
- return show_fan(dev, buf, num-1); \
-} \
-static DEVICE_ATTR(fan##num##_input, S_IRUGO, show_fan##num, NULL)
-
-sysfs_fan(1);
-sysfs_fan(2);
-sysfs_fan(3);
-sysfs_fan(4);
-
-#define device_create_file_fan(client, num) \
- device_create_file(&client->dev, &dev_attr_fan##num##_input)
-
-static int smsc47b397_detach_client(struct i2c_client *client)
+static ssize_t show_name(struct device *dev, struct device_attribute
+ *devattr, char *buf)
{
- struct smsc47b397_data *data = i2c_get_clientdata(client);
- int err;
+ struct smsc47b397_data *data = dev_get_drvdata(dev);
+ return sprintf(buf, "%s\n", data->name);
+}
+static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
+
+static struct attribute *smsc47b397_attributes[] = {
+ &sensor_dev_attr_temp1_input.dev_attr.attr,
+ &sensor_dev_attr_temp2_input.dev_attr.attr,
+ &sensor_dev_attr_temp3_input.dev_attr.attr,
+ &sensor_dev_attr_temp4_input.dev_attr.attr,
+ &sensor_dev_attr_fan1_input.dev_attr.attr,
+ &sensor_dev_attr_fan2_input.dev_attr.attr,
+ &sensor_dev_attr_fan3_input.dev_attr.attr,
+ &sensor_dev_attr_fan4_input.dev_attr.attr,
+
+ &dev_attr_name.attr,
+ NULL
+};
- hwmon_device_unregister(data->class_dev);
+static const struct attribute_group smsc47b397_group = {
+ .attrs = smsc47b397_attributes,
+};
- if ((err = i2c_detach_client(client)))
- return err;
+static int smsc47b397_remove(struct platform_device *pdev)
+{
+ struct smsc47b397_data *data = platform_get_drvdata(pdev);
- release_region(client->addr, SMSC_EXTENT);
- kfree(data);
+ hwmon_device_unregister(data->hwmon_dev);
+ sysfs_remove_group(&pdev->dev.kobj, &smsc47b397_group);
return 0;
}
-static int smsc47b397_detect(struct i2c_adapter *adapter);
+static int smsc47b397_probe(struct platform_device *pdev);
-static struct i2c_driver smsc47b397_driver = {
- .owner = THIS_MODULE,
- .name = "smsc47b397",
- .attach_adapter = smsc47b397_detect,
- .detach_client = smsc47b397_detach_client,
+static struct platform_driver smsc47b397_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = DRVNAME,
+ },
+ .probe = smsc47b397_probe,
+ .remove = smsc47b397_remove,
};
-static int smsc47b397_detect(struct i2c_adapter *adapter)
+static int smsc47b397_probe(struct platform_device *pdev)
{
- struct i2c_client *new_client;
+ struct device *dev = &pdev->dev;
struct smsc47b397_data *data;
+ struct resource *res;
int err = 0;
- if (!request_region(address, SMSC_EXTENT, smsc47b397_driver.name)) {
- dev_err(&adapter->dev, "Region 0x%x already in use!\n",
- address);
+ res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+ if (!devm_request_region(dev, res->start, SMSC_EXTENT,
+ smsc47b397_driver.driver.name)) {
+ dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
+ (unsigned long)res->start,
+ (unsigned long)res->start + SMSC_EXTENT - 1);
return -EBUSY;
}
- if (!(data = kzalloc(sizeof(struct smsc47b397_data), GFP_KERNEL))) {
- err = -ENOMEM;
- goto error_release;
+ data = devm_kzalloc(dev, sizeof(struct smsc47b397_data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->addr = res->start;
+ data->name = "smsc47b397";
+ mutex_init(&data->lock);
+ mutex_init(&data->update_lock);
+ platform_set_drvdata(pdev, data);
+
+ err = sysfs_create_group(&dev->kobj, &smsc47b397_group);
+ if (err)
+ return err;
+
+ data->hwmon_dev = hwmon_device_register(dev);
+ if (IS_ERR(data->hwmon_dev)) {
+ err = PTR_ERR(data->hwmon_dev);
+ goto error_remove;
}
- new_client = &data->client;
- i2c_set_clientdata(new_client, data);
- new_client->addr = address;
- init_MUTEX(&data->lock);
- new_client->adapter = adapter;
- new_client->driver = &smsc47b397_driver;
- new_client->flags = 0;
+ return 0;
- strlcpy(new_client->name, "smsc47b397", I2C_NAME_SIZE);
+error_remove:
+ sysfs_remove_group(&dev->kobj, &smsc47b397_group);
+ return err;
+}
- init_MUTEX(&data->update_lock);
+static int __init smsc47b397_device_add(unsigned short address)
+{
+ struct resource res = {
+ .start = address,
+ .end = address + SMSC_EXTENT - 1,
+ .name = DRVNAME,
+ .flags = IORESOURCE_IO,
+ };
+ int err;
- if ((err = i2c_attach_client(new_client)))
- goto error_free;
+ err = acpi_check_resource_conflict(&res);
+ if (err)
+ goto exit;
- data->class_dev = hwmon_device_register(&new_client->dev);
- if (IS_ERR(data->class_dev)) {
- err = PTR_ERR(data->class_dev);
- goto error_detach;
+ pdev = platform_device_alloc(DRVNAME, address);
+ if (!pdev) {
+ err = -ENOMEM;
+ pr_err("Device allocation failed\n");
+ goto exit;
}
- device_create_file_temp(new_client, 1);
- device_create_file_temp(new_client, 2);
- device_create_file_temp(new_client, 3);
- device_create_file_temp(new_client, 4);
+ err = platform_device_add_resources(pdev, &res, 1);
+ if (err) {
+ pr_err("Device resource addition failed (%d)\n", err);
+ goto exit_device_put;
+ }
- device_create_file_fan(new_client, 1);
- device_create_file_fan(new_client, 2);
- device_create_file_fan(new_client, 3);
- device_create_file_fan(new_client, 4);
+ err = platform_device_add(pdev);
+ if (err) {
+ pr_err("Device addition failed (%d)\n", err);
+ goto exit_device_put;
+ }
return 0;
-error_detach:
- i2c_detach_client(new_client);
-error_free:
- kfree(data);
-error_release:
- release_region(address, SMSC_EXTENT);
+exit_device_put:
+ platform_device_put(pdev);
+exit:
return err;
}
-static int __init smsc47b397_find(unsigned short *addr)
+static int __init smsc47b397_find(void)
{
u8 id, rev;
+ char *name;
+ unsigned short addr;
superio_enter();
- id = superio_inb(SUPERIO_REG_DEVID);
-
- if ((id != 0x6f) && (id != 0x81)) {
+ id = force_id ? force_id : superio_inb(SUPERIO_REG_DEVID);
+
+ switch (id) {
+ case 0x81:
+ name = "SCH5307-NS";
+ break;
+ case 0x6f:
+ name = "LPC47B397-NC";
+ break;
+ case 0x85:
+ case 0x8c:
+ name = "SCH5317";
+ break;
+ default:
superio_exit();
return -ENODEV;
}
@@ -306,30 +361,47 @@ static int __init smsc47b397_find(unsigned short *addr)
rev = superio_inb(SUPERIO_REG_DEVREV);
superio_select(SUPERIO_REG_LD8);
- *addr = (superio_inb(SUPERIO_REG_BASE_MSB) << 8)
+ addr = (superio_inb(SUPERIO_REG_BASE_MSB) << 8)
| superio_inb(SUPERIO_REG_BASE_LSB);
- printk(KERN_INFO "smsc47b397: found SMSC %s "
- "(base address 0x%04x, revision %u)\n",
- id == 0x81 ? "SCH5307-NS" : "LPC47B397-NC", *addr, rev);
+ pr_info("found SMSC %s (base address 0x%04x, revision %u)\n",
+ name, addr, rev);
superio_exit();
- return 0;
+ return addr;
}
static int __init smsc47b397_init(void)
{
+ unsigned short address;
int ret;
- if ((ret = smsc47b397_find(&address)))
+ ret = smsc47b397_find();
+ if (ret < 0)
return ret;
+ address = ret;
+
+ ret = platform_driver_register(&smsc47b397_driver);
+ if (ret)
+ goto exit;
+
+ /* Sets global pdev as a side effect */
+ ret = smsc47b397_device_add(address);
+ if (ret)
+ goto exit_driver;
+
+ return 0;
- return i2c_isa_add_driver(&smsc47b397_driver);
+exit_driver:
+ platform_driver_unregister(&smsc47b397_driver);
+exit:
+ return ret;
}
static void __exit smsc47b397_exit(void)
{
- i2c_isa_del_driver(&smsc47b397_driver);
+ platform_device_unregister(pdev);
+ platform_driver_unregister(&smsc47b397_driver);
}
MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 17:59:55 +0000