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path: root/drivers/hwmon/lm78.c
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Diffstat (limited to 'drivers/hwmon/lm78.c')
-rw-r--r--drivers/hwmon/lm78.c90
1 files changed, 59 insertions, 31 deletions
diff --git a/drivers/hwmon/lm78.c b/drivers/hwmon/lm78.c
index 29241469dcba..bde0cda9477e 100644
--- a/drivers/hwmon/lm78.c
+++ b/drivers/hwmon/lm78.c
@@ -23,7 +23,10 @@
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
-#include <linux/i2c-sensor.h>
+#include <linux/i2c-isa.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-vid.h>
+#include <linux/err.h>
#include <asm/io.h>
/* Addresses to scan */
@@ -31,10 +34,10 @@ static unsigned short normal_i2c[] = { 0x20, 0x21, 0x22, 0x23, 0x24,
0x25, 0x26, 0x27, 0x28, 0x29,
0x2a, 0x2b, 0x2c, 0x2d, 0x2e,
0x2f, I2C_CLIENT_END };
-static unsigned int normal_isa[] = { 0x0290, I2C_CLIENT_ISA_END };
+static unsigned short isa_address = 0x290;
/* Insmod parameters */
-SENSORS_INSMOD_3(lm78, lm78j, lm79);
+I2C_CLIENT_INSMOD_2(lm78, lm79);
/* Many LM78 constants specified below */
@@ -104,13 +107,6 @@ static inline int TEMP_FROM_REG(s8 val)
return val * 1000;
}
-/* VID: mV
- REG: (see doc/vid) */
-static inline int VID_FROM_REG(u8 val)
-{
- return val==0x1f ? 0 : val>=0x10 ? 5100-val*100 : 2050-val*50;
-}
-
#define DIV_FROM_REG(val) (1 << (val))
/* There are some complications in a module like this. First off, LM78 chips
@@ -134,6 +130,7 @@ static inline int VID_FROM_REG(u8 val)
allocated. */
struct lm78_data {
struct i2c_client client;
+ struct class_device *class_dev;
struct semaphore lock;
enum chips type;
@@ -156,6 +153,7 @@ struct lm78_data {
static int lm78_attach_adapter(struct i2c_adapter *adapter);
+static int lm78_isa_attach_adapter(struct i2c_adapter *adapter);
static int lm78_detect(struct i2c_adapter *adapter, int address, int kind);
static int lm78_detach_client(struct i2c_client *client);
@@ -174,6 +172,14 @@ static struct i2c_driver lm78_driver = {
.detach_client = lm78_detach_client,
};
+static struct i2c_driver lm78_isa_driver = {
+ .owner = THIS_MODULE,
+ .name = "lm78-isa",
+ .attach_adapter = lm78_isa_attach_adapter,
+ .detach_client = lm78_detach_client,
+};
+
+
/* 7 Voltages */
static ssize_t show_in(struct device *dev, char *buf, int nr)
{
@@ -445,7 +451,7 @@ static DEVICE_ATTR(fan3_div, S_IRUGO, show_fan_3_div, NULL);
static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf)
{
struct lm78_data *data = lm78_update_device(dev);
- return sprintf(buf, "%d\n", VID_FROM_REG(data->vid));
+ return sprintf(buf, "%d\n", vid_from_reg(82, data->vid));
}
static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
@@ -465,11 +471,16 @@ static int lm78_attach_adapter(struct i2c_adapter *adapter)
{
if (!(adapter->class & I2C_CLASS_HWMON))
return 0;
- return i2c_detect(adapter, &addr_data, lm78_detect);
+ return i2c_probe(adapter, &addr_data, lm78_detect);
+}
+
+static int lm78_isa_attach_adapter(struct i2c_adapter *adapter)
+{
+ return lm78_detect(adapter, isa_address, -1);
}
-/* This function is called by i2c_detect */
-int lm78_detect(struct i2c_adapter *adapter, int address, int kind)
+/* This function is called by i2c_probe */
+static int lm78_detect(struct i2c_adapter *adapter, int address, int kind)
{
int i, err;
struct i2c_client *new_client;
@@ -485,7 +496,8 @@ int lm78_detect(struct i2c_adapter *adapter, int address, int kind)
/* Reserve the ISA region */
if (is_isa)
- if (!request_region(address, LM78_EXTENT, lm78_driver.name)) {
+ if (!request_region(address, LM78_EXTENT,
+ lm78_isa_driver.name)) {
err = -EBUSY;
goto ERROR0;
}
@@ -528,11 +540,10 @@ int lm78_detect(struct i2c_adapter *adapter, int address, int kind)
client structure, even though we cannot fill it completely yet.
But it allows us to access lm78_{read,write}_value. */
- if (!(data = kmalloc(sizeof(struct lm78_data), GFP_KERNEL))) {
+ if (!(data = kzalloc(sizeof(struct lm78_data), GFP_KERNEL))) {
err = -ENOMEM;
goto ERROR1;
}
- memset(data, 0, sizeof(struct lm78_data));
new_client = &data->client;
if (is_isa)
@@ -540,7 +551,7 @@ int lm78_detect(struct i2c_adapter *adapter, int address, int kind)
i2c_set_clientdata(new_client, data);
new_client->addr = address;
new_client->adapter = adapter;
- new_client->driver = &lm78_driver;
+ new_client->driver = is_isa ? &lm78_isa_driver : &lm78_driver;
new_client->flags = 0;
/* Now, we do the remaining detection. */
@@ -559,10 +570,9 @@ int lm78_detect(struct i2c_adapter *adapter, int address, int kind)
/* Determine the chip type. */
if (kind <= 0) {
i = lm78_read_value(new_client, LM78_REG_CHIPID);
- if (i == 0x00 || i == 0x20)
+ if (i == 0x00 || i == 0x20 /* LM78 */
+ || i == 0x40) /* LM78-J */
kind = lm78;
- else if (i == 0x40)
- kind = lm78j;
else if ((i & 0xfe) == 0xc0)
kind = lm79;
else {
@@ -578,8 +588,6 @@ int lm78_detect(struct i2c_adapter *adapter, int address, int kind)
if (kind == lm78) {
client_name = "lm78";
- } else if (kind == lm78j) {
- client_name = "lm78-j";
} else if (kind == lm79) {
client_name = "lm79";
}
@@ -605,6 +613,12 @@ int lm78_detect(struct i2c_adapter *adapter, int address, int kind)
}
/* Register sysfs hooks */
+ data->class_dev = hwmon_device_register(&new_client->dev);
+ if (IS_ERR(data->class_dev)) {
+ err = PTR_ERR(data->class_dev);
+ goto ERROR3;
+ }
+
device_create_file(&new_client->dev, &dev_attr_in0_input);
device_create_file(&new_client->dev, &dev_attr_in0_min);
device_create_file(&new_client->dev, &dev_attr_in0_max);
@@ -643,6 +657,8 @@ int lm78_detect(struct i2c_adapter *adapter, int address, int kind)
return 0;
+ERROR3:
+ i2c_detach_client(new_client);
ERROR2:
kfree(data);
ERROR1:
@@ -654,18 +670,18 @@ ERROR0:
static int lm78_detach_client(struct i2c_client *client)
{
+ struct lm78_data *data = i2c_get_clientdata(client);
int err;
- if ((err = i2c_detach_client(client))) {
- dev_err(&client->dev,
- "Client deregistration failed, client not detached.\n");
+ hwmon_device_unregister(data->class_dev);
+
+ if ((err = i2c_detach_client(client)))
return err;
- }
if(i2c_is_isa_client(client))
release_region(client->addr, LM78_EXTENT);
- kfree(i2c_get_clientdata(client));
+ kfree(data);
return 0;
}
@@ -709,7 +725,6 @@ static int lm78_write_value(struct i2c_client *client, u8 reg, u8 value)
return i2c_smbus_write_byte_data(client, reg, value);
}
-/* Called when we have found a new LM78. It should set limits, etc. */
static void lm78_init_client(struct i2c_client *client)
{
u8 config = lm78_read_value(client, LM78_REG_CONFIG);
@@ -777,18 +792,31 @@ static struct lm78_data *lm78_update_device(struct device *dev)
static int __init sm_lm78_init(void)
{
- return i2c_add_driver(&lm78_driver);
+ int res;
+
+ res = i2c_add_driver(&lm78_driver);
+ if (res)
+ return res;
+
+ res = i2c_isa_add_driver(&lm78_isa_driver);
+ if (res) {
+ i2c_del_driver(&lm78_driver);
+ return res;
+ }
+
+ return 0;
}
static void __exit sm_lm78_exit(void)
{
+ i2c_isa_del_driver(&lm78_isa_driver);
i2c_del_driver(&lm78_driver);
}
MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>");
-MODULE_DESCRIPTION("LM78, LM78-J and LM79 driver");
+MODULE_DESCRIPTION("LM78/LM79 driver");
MODULE_LICENSE("GPL");
module_init(sm_lm78_init);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.