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Diffstat (limited to 'drivers/hwmon/lm78.c')
-rw-r--r--drivers/hwmon/lm78.c268
1 files changed, 158 insertions, 110 deletions
diff --git a/drivers/hwmon/lm78.c b/drivers/hwmon/lm78.c
index 6df0b468171..9efadfc851b 100644
--- a/drivers/hwmon/lm78.c
+++ b/drivers/hwmon/lm78.c
@@ -1,23 +1,23 @@
/*
- lm78.c - Part of lm_sensors, Linux kernel modules for hardware
- monitoring
- Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
- Copyright (c) 2007, 2011 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.
-*/
+ * lm78.c - Part of lm_sensors, Linux kernel modules for hardware
+ * monitoring
+ * Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
+ * Copyright (c) 2007, 2011 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
@@ -74,14 +74,18 @@ enum chips { lm78, lm79 };
#define LM78_REG_I2C_ADDR 0x48
-/* Conversions. Rounding and limit checking is only done on the TO_REG
- variants. */
+/*
+ * Conversions. Rounding and limit checking is only done on the TO_REG
+ * variants.
+ */
-/* IN: mV, (0V to 4.08V)
- REG: 16mV/bit */
+/*
+ * IN: mV (0V to 4.08V)
+ * REG: 16mV/bit
+ */
static inline u8 IN_TO_REG(unsigned long val)
{
- unsigned long nval = SENSORS_LIMIT(val, 0, 4080);
+ unsigned long nval = clamp_val(val, 0, 4080);
return (nval + 8) / 16;
}
#define IN_FROM_REG(val) ((val) * 16)
@@ -90,20 +94,24 @@ static inline u8 FAN_TO_REG(long rpm, int div)
{
if (rpm <= 0)
return 255;
- return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
+ if (rpm > 1350000)
+ return 1;
+ return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
}
static inline int FAN_FROM_REG(u8 val, int div)
{
- return val==0 ? -1 : val==255 ? 0 : 1350000/(val*div);
+ return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div);
}
-/* TEMP: mC (-128C to +127C)
- REG: 1C/bit, two's complement */
+/*
+ * TEMP: mC (-128C to +127C)
+ * REG: 1C/bit, two's complement
+ */
static inline s8 TEMP_TO_REG(int val)
{
- int nval = SENSORS_LIMIT(val, -128000, 127000) ;
- return nval<0 ? (nval-500)/1000 : (nval+500)/1000;
+ int nval = clamp_val(val, -128000, 127000) ;
+ return nval < 0 ? (nval - 500) / 1000 : (nval + 500) / 1000;
}
static inline int TEMP_FROM_REG(s8 val)
@@ -177,8 +185,13 @@ static ssize_t set_in_min(struct device *dev, struct device_attribute *da,
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
struct lm78_data *data = dev_get_drvdata(dev);
- unsigned long val = simple_strtoul(buf, NULL, 10);
int nr = attr->index;
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
mutex_lock(&data->update_lock);
data->in_min[nr] = IN_TO_REG(val);
@@ -192,8 +205,13 @@ static ssize_t set_in_max(struct device *dev, struct device_attribute *da,
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
struct lm78_data *data = dev_get_drvdata(dev);
- unsigned long val = simple_strtoul(buf, NULL, 10);
int nr = attr->index;
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
mutex_lock(&data->update_lock);
data->in_max[nr] = IN_TO_REG(val);
@@ -201,7 +219,7 @@ static ssize_t set_in_max(struct device *dev, struct device_attribute *da,
mutex_unlock(&data->update_lock);
return count;
}
-
+
#define show_in_offset(offset) \
static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
show_in, NULL, offset); \
@@ -237,7 +255,12 @@ static ssize_t set_temp_over(struct device *dev, struct device_attribute *da,
const char *buf, size_t count)
{
struct lm78_data *data = dev_get_drvdata(dev);
- long val = simple_strtol(buf, NULL, 10);
+ long val;
+ int err;
+
+ err = kstrtol(buf, 10, &val);
+ if (err)
+ return err;
mutex_lock(&data->update_lock);
data->temp_over = TEMP_TO_REG(val);
@@ -257,7 +280,12 @@ static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *da,
const char *buf, size_t count)
{
struct lm78_data *data = dev_get_drvdata(dev);
- long val = simple_strtol(buf, NULL, 10);
+ long val;
+ int err;
+
+ err = kstrtol(buf, 10, &val);
+ if (err)
+ return err;
mutex_lock(&data->update_lock);
data->temp_hyst = TEMP_TO_REG(val);
@@ -280,7 +308,7 @@ static ssize_t show_fan(struct device *dev, struct device_attribute *da,
struct lm78_data *data = lm78_update_device(dev);
int nr = attr->index;
return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
- DIV_FROM_REG(data->fan_div[nr])) );
+ DIV_FROM_REG(data->fan_div[nr])));
}
static ssize_t show_fan_min(struct device *dev, struct device_attribute *da,
@@ -289,8 +317,8 @@ static ssize_t show_fan_min(struct device *dev, struct device_attribute *da,
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
struct lm78_data *data = lm78_update_device(dev);
int nr = attr->index;
- return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan_min[nr],
- DIV_FROM_REG(data->fan_div[nr])) );
+ return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
+ DIV_FROM_REG(data->fan_div[nr])));
}
static ssize_t set_fan_min(struct device *dev, struct device_attribute *da,
@@ -299,7 +327,12 @@ static ssize_t set_fan_min(struct device *dev, struct device_attribute *da,
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
struct lm78_data *data = dev_get_drvdata(dev);
int nr = attr->index;
- unsigned long val = simple_strtoul(buf, NULL, 10);
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
mutex_lock(&data->update_lock);
data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
@@ -316,32 +349,48 @@ static ssize_t show_fan_div(struct device *dev, struct device_attribute *da,
return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index]));
}
-/* Note: we save and restore the fan minimum here, because its value is
- determined in part by the fan divisor. This follows the principle of
- least surprise; the user doesn't expect the fan minimum to change just
- because the divisor changed. */
+/*
+ * Note: we save and restore the fan minimum here, because its value is
+ * determined in part by the fan divisor. This follows the principle of
+ * least surprise; the user doesn't expect the fan minimum to change just
+ * because the divisor changed.
+ */
static ssize_t set_fan_div(struct device *dev, struct device_attribute *da,
const char *buf, size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
struct lm78_data *data = dev_get_drvdata(dev);
int nr = attr->index;
- unsigned long val = simple_strtoul(buf, NULL, 10);
unsigned long min;
u8 reg;
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
mutex_lock(&data->update_lock);
min = FAN_FROM_REG(data->fan_min[nr],
DIV_FROM_REG(data->fan_div[nr]));
switch (val) {
- case 1: data->fan_div[nr] = 0; break;
- case 2: data->fan_div[nr] = 1; break;
- case 4: data->fan_div[nr] = 2; break;
- case 8: data->fan_div[nr] = 3; break;
+ case 1:
+ data->fan_div[nr] = 0;
+ break;
+ case 2:
+ data->fan_div[nr] = 1;
+ break;
+ case 4:
+ data->fan_div[nr] = 2;
+ break;
+ case 8:
+ data->fan_div[nr] = 3;
+ break;
default:
- dev_err(dev, "fan_div value %ld not "
- "supported. Choose one of 1, 2, 4 or 8!\n", val);
+ dev_err(dev,
+ "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
+ val);
mutex_unlock(&data->update_lock);
return -EINVAL;
}
@@ -484,8 +533,10 @@ static struct platform_device *pdev;
static unsigned short isa_address = 0x290;
-/* I2C devices get this name attribute automatically, but for ISA devices
- we must create it by ourselves. */
+/*
+ * I2C devices get this name attribute automatically, but for ISA devices
+ * we must create it by ourselves.
+ */
static ssize_t show_name(struct device *dev, struct device_attribute
*devattr, char *buf)
{
@@ -515,8 +566,10 @@ static int lm78_alias_detect(struct i2c_client *client, u8 chipid)
if ((lm78_read_value(isa, LM78_REG_CHIPID) & 0xfe) != (chipid & 0xfe))
return 0; /* Chip type doesn't match */
- /* We compare all the limit registers, the config register and the
- * interrupt mask registers */
+ /*
+ * We compare all the limit registers, the config register and the
+ * interrupt mask registers
+ */
for (i = 0x2b; i <= 0x3d; i++) {
if (lm78_read_value(isa, i) !=
i2c_smbus_read_byte_data(client, i))
@@ -558,9 +611,11 @@ static int lm78_i2c_detect(struct i2c_client *client,
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
- /* We block updates of the ISA device to minimize the risk of
- concurrent access to the same LM78 chip through different
- interfaces. */
+ /*
+ * We block updates of the ISA device to minimize the risk of
+ * concurrent access to the same LM78 chip through different
+ * interfaces.
+ */
if (isa)
mutex_lock(&isa->update_lock);
@@ -584,8 +639,9 @@ static int lm78_i2c_detect(struct i2c_client *client,
goto err_nodev;
if (lm78_alias_detect(client, i)) {
- dev_dbg(&adapter->dev, "Device at 0x%02x appears to "
- "be the same as ISA device\n", address);
+ dev_dbg(&adapter->dev,
+ "Device at 0x%02x appears to be the same as ISA device\n",
+ address);
goto err_nodev;
}
@@ -608,7 +664,7 @@ static int lm78_i2c_probe(struct i2c_client *client,
struct lm78_data *data;
int err;
- data = kzalloc(sizeof(struct lm78_data), GFP_KERNEL);
+ data = devm_kzalloc(&client->dev, sizeof(struct lm78_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
@@ -622,20 +678,18 @@ static int lm78_i2c_probe(struct i2c_client *client,
/* Register sysfs hooks */
err = sysfs_create_group(&client->dev.kobj, &lm78_group);
if (err)
- goto ERROR3;
+ return err;
data->hwmon_dev = hwmon_device_register(&client->dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
- goto ERROR4;
+ goto error;
}
return 0;
-ERROR4:
+error:
sysfs_remove_group(&client->dev.kobj, &lm78_group);
-ERROR3:
- kfree(data);
return err;
}
@@ -645,7 +699,6 @@ static int lm78_i2c_remove(struct i2c_client *client)
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &lm78_group);
- kfree(data);
return 0;
}
@@ -669,11 +722,13 @@ static struct i2c_driver lm78_driver = {
.address_list = normal_i2c,
};
-/* The SMBus locks itself, but ISA access must be locked explicitly!
- We don't want to lock the whole ISA bus, so we lock each client
- separately.
- We ignore the LM78 BUSY flag at this moment - it could lead to deadlocks,
- would slow down the LM78 access and should not be necessary. */
+/*
+ * The SMBus locks itself, but ISA access must be locked explicitly!
+ * We don't want to lock the whole ISA bus, so we lock each client
+ * separately.
+ * We ignore the LM78 BUSY flag at this moment - it could lead to deadlocks,
+ * would slow down the LM78 access and should not be necessary.
+ */
static int lm78_read_value(struct lm78_data *data, u8 reg)
{
struct i2c_client *client = data->client;
@@ -691,13 +746,6 @@ static int lm78_read_value(struct lm78_data *data, u8 reg)
return i2c_smbus_read_byte_data(client, reg);
}
-/* The SMBus locks itself, but ISA access muse be locked explicitly!
- We don't want to lock the whole ISA bus, so we lock each client
- separately.
- We ignore the LM78 BUSY flag at this moment - it could lead to deadlocks,
- would slow down the LM78 access and should not be necessary.
- There are some ugly typecasts here, but the good new is - they should
- nowhere else be necessary! */
static int lm78_write_value(struct lm78_data *data, u8 reg, u8 value)
{
struct i2c_client *client = data->client;
@@ -789,7 +837,7 @@ static struct lm78_data *lm78_update_device(struct device *dev)
}
#ifdef CONFIG_ISA
-static int __devinit lm78_isa_probe(struct platform_device *pdev)
+static int lm78_isa_probe(struct platform_device *pdev)
{
int err;
struct lm78_data *data;
@@ -797,16 +845,14 @@ static int __devinit lm78_isa_probe(struct platform_device *pdev)
/* Reserve the ISA region */
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
- if (!request_region(res->start + LM78_ADDR_REG_OFFSET, 2, "lm78")) {
- err = -EBUSY;
- goto exit;
- }
+ if (!devm_request_region(&pdev->dev, res->start + LM78_ADDR_REG_OFFSET,
+ 2, "lm78"))
+ return -EBUSY;
+
+ data = devm_kzalloc(&pdev->dev, sizeof(struct lm78_data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
- data = kzalloc(sizeof(struct lm78_data), GFP_KERNEL);
- if (!data) {
- err = -ENOMEM;
- goto exit_release_region;
- }
mutex_init(&data->lock);
data->isa_addr = res->start;
platform_set_drvdata(pdev, data);
@@ -823,8 +869,11 @@ static int __devinit lm78_isa_probe(struct platform_device *pdev)
lm78_init_device(data);
/* Register sysfs hooks */
- if ((err = sysfs_create_group(&pdev->dev.kobj, &lm78_group))
- || (err = device_create_file(&pdev->dev, &dev_attr_name)))
+ err = sysfs_create_group(&pdev->dev.kobj, &lm78_group);
+ if (err)
+ goto exit_remove_files;
+ err = device_create_file(&pdev->dev, &dev_attr_name);
+ if (err)
goto exit_remove_files;
data->hwmon_dev = hwmon_device_register(&pdev->dev);
@@ -838,25 +887,16 @@ static int __devinit lm78_isa_probe(struct platform_device *pdev)
exit_remove_files:
sysfs_remove_group(&pdev->dev.kobj, &lm78_group);
device_remove_file(&pdev->dev, &dev_attr_name);
- kfree(data);
- exit_release_region:
- release_region(res->start + LM78_ADDR_REG_OFFSET, 2);
- exit:
return err;
}
-static int __devexit lm78_isa_remove(struct platform_device *pdev)
+static int lm78_isa_remove(struct platform_device *pdev)
{
struct lm78_data *data = platform_get_drvdata(pdev);
- struct resource *res;
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&pdev->dev.kobj, &lm78_group);
device_remove_file(&pdev->dev, &dev_attr_name);
- kfree(data);
-
- res = platform_get_resource(pdev, IORESOURCE_IO, 0);
- release_region(res->start + LM78_ADDR_REG_OFFSET, 2);
return 0;
}
@@ -867,7 +907,7 @@ static struct platform_driver lm78_isa_driver = {
.name = "lm78",
},
.probe = lm78_isa_probe,
- .remove = __devexit_p(lm78_isa_remove),
+ .remove = lm78_isa_remove,
};
/* return 1 if a supported chip is found, 0 otherwise */
@@ -876,9 +916,11 @@ static int __init lm78_isa_found(unsigned short address)
int val, save, found = 0;
int port;
- /* Some boards declare base+0 to base+7 as a PNP device, some base+4
+ /*
+ * Some boards declare base+0 to base+7 as a PNP device, some base+4
* to base+7 and some base+5 to base+6. So we better request each port
- * individually for the probing phase. */
+ * individually for the probing phase.
+ */
for (port = address; port < address + LM78_EXTENT; port++) {
if (!request_region(port, 1, "lm78")) {
pr_debug("Failed to request port 0x%x\n", port);
@@ -887,8 +929,10 @@ static int __init lm78_isa_found(unsigned short address)
}
#define REALLY_SLOW_IO
- /* We need the timeouts for at least some LM78-like
- chips. But only if we read 'undefined' registers. */
+ /*
+ * We need the timeouts for at least some LM78-like
+ * chips. But only if we read 'undefined' registers.
+ */
val = inb_p(address + 1);
if (inb_p(address + 2) != val
|| inb_p(address + 3) != val
@@ -896,8 +940,10 @@ static int __init lm78_isa_found(unsigned short address)
goto release;
#undef REALLY_SLOW_IO
- /* We should be able to change the 7 LSB of the address port. The
- MSB (busy flag) should be clear initially, set after the write. */
+ /*
+ * We should be able to change the 7 LSB of the address port. The
+ * MSB (busy flag) should be clear initially, set after the write.
+ */
save = inb_p(address + LM78_ADDR_REG_OFFSET);
if (save & 0x80)
goto release;
@@ -1036,8 +1082,10 @@ static int __init sm_lm78_init(void)
{
int res;
- /* We register the ISA device first, so that we can skip the
- * registration of an I2C interface to the same device. */
+ /*
+ * We register the ISA device first, so that we can skip the
+ * registration of an I2C interface to the same device.
+ */
res = lm78_isa_register();
if (res)
goto exit;
@@ -1060,7 +1108,7 @@ static void __exit sm_lm78_exit(void)
i2c_del_driver(&lm78_driver);
}
-MODULE_AUTHOR("Frodo Looijaard, Jean Delvare <khali@linux-fr.org>");
+MODULE_AUTHOR("Frodo Looijaard, Jean Delvare <jdelvare@suse.de>");
MODULE_DESCRIPTION("LM78/LM79 driver");
MODULE_LICENSE("GPL");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-06 03:14:57 +0000