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hwmon: (lm95245) Use new hwmon registration API

Browse source 
Simplify code and reduce code size by using the new hwmon
registration API.

Other changes:

- Convert to use regmap, and drop local caching. This avoids reading
  registers unnecessarily, and uses regmap for caching of non-volatile
  registers.
- Add support for temp2_max, temp2_max_alarm, temp2_max_hyst, and
  temp2_offset.
- Order include files alphabetically
- Drop FSF address
- Check errors from register read and write functions and report
  to userspace.
- Accept negative hysteresis values. While unlikely, a maximum limit
  _can_ be set to a value smaller than 31 degrees C, which makes negative
  hysteresis values possible.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2016-07-05 19:10:52 -07:00
parent 3e9046281b
commit c0a4b9ec1b
1 changed files with 375 additions and 255 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

630
drivers/hwmon/lm95245.c
View file

@ -15,22 +15,16 @@
* but WITHOUT ANY WARRANTY; without even the implied warranty of * but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details. * 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.
*/ */
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h> #include <linux/err.h>
#include <linux/init.h>
#include <linux/hwmon.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/mutex.h> #include <linux/mutex.h>
#include <linux/sysfs.h> #include <linux/regmap.h>
#include <linux/slab.h>
static const unsigned short normal_i2c[] = { static const unsigned short normal_i2c[] = {
0x18, 0x19, 0x29, 0x4c, 0x4d, I2C_CLIENT_END }; 0x18, 0x19, 0x29, 0x4c, 0x4d, I2C_CLIENT_END };
@ -89,6 +83,7 @@ static const unsigned short normal_i2c[] = {
#define RATE_CR1000 0x02 #define RATE_CR1000 0x02
#define RATE_CR2500 0x03 #define RATE_CR2500 0x03
#define STATUS1_ROS 0x10
#define STATUS1_DIODE_FAULT 0x04 #define STATUS1_DIODE_FAULT 0x04
#define STATUS1_RTCRIT 0x02 #define STATUS1_RTCRIT 0x02
#define STATUS1_LOC 0x01 #define STATUS1_LOC 0x01
@ -112,14 +107,9 @@ static const u8 lm95245_reg_address[] = {
/* Client data (each client gets its own) */ /* Client data (each client gets its own) */
struct lm95245_data { struct lm95245_data {
struct i2c_client *client; struct regmap *regmap;
struct mutex update_lock; struct mutex update_lock;
unsigned long last_updated; /* in jiffies */ int interval; /* in msecs */
unsigned long interval; /* in msecs */
bool valid; /* zero until following fields are valid */
/* registers values */
u8 regs[ARRAY_SIZE(lm95245_reg_address)];
u8 config1, config2;
}; };
/* Conversions */ /* Conversions */
@ -135,60 +125,36 @@ static int temp_from_reg_signed(u8 val_h, u8 val_l)
return temp_from_reg_unsigned(val_h, val_l); return temp_from_reg_unsigned(val_h, val_l);
} }
static struct lm95245_data *lm95245_update_device(struct device *dev) static int lm95245_read_conversion_rate(struct lm95245_data *data)
{ {
struct lm95245_data *data = dev_get_drvdata(dev); unsigned int rate;
struct i2c_client *client = data->client; int ret;
mutex_lock(&data->update_lock); ret = regmap_read(data->regmap, LM95245_REG_RW_CONVERS_RATE, &rate);
if (ret < 0)
if (time_after(jiffies, data->last_updated return ret;
+ msecs_to_jiffies(data->interval)) || !data->valid) {
int i;
for (i = 0; i < ARRAY_SIZE(lm95245_reg_address); i++)
data->regs[i]
= i2c_smbus_read_byte_data(client,
lm95245_reg_address[i]);
data->last_updated = jiffies;
data->valid = 1;
}
mutex_unlock(&data->update_lock);
return data;
}
static unsigned long lm95245_read_conversion_rate(struct i2c_client *client)
{
int rate;
unsigned long interval;
rate = i2c_smbus_read_byte_data(client, LM95245_REG_RW_CONVERS_RATE);
switch (rate) { switch (rate) {
case RATE_CR0063: case RATE_CR0063:
interval = 63; data->interval = 63;
break; break;
case RATE_CR0364: case RATE_CR0364:
interval = 364; data->interval = 364;
break; break;
case RATE_CR1000: case RATE_CR1000:
interval = 1000; data->interval = 1000;
break; break;
case RATE_CR2500: case RATE_CR2500:
default: default:
interval = 2500; data->interval = 2500;
break; break;
} }
return 0;
return interval;
} }
static unsigned long lm95245_set_conversion_rate(struct i2c_client *client, static int lm95245_set_conversion_rate(struct lm95245_data *data, long interval)
unsigned long interval)
{ {
int rate; int ret, rate;
if (interval <= 63) { if (interval <= 63) {
interval = 63; interval = 63;
@ -204,220 +170,288 @@ static unsigned long lm95245_set_conversion_rate(struct i2c_client *client,
rate = RATE_CR2500; rate = RATE_CR2500;
} }
i2c_smbus_write_byte_data(client, LM95245_REG_RW_CONVERS_RATE, rate); ret = regmap_write(data->regmap, LM95245_REG_RW_CONVERS_RATE, rate);
if (ret < 0)
return ret;
return interval; data->interval = interval;
return 0;
} }
/* Sysfs stuff */ static int lm95245_read_temp(struct device *dev, u32 attr, int channel,
static ssize_t show_input(struct device *dev, struct device_attribute *attr, long *val)
char *buf)
{
struct lm95245_data *data = lm95245_update_device(dev);
int temp;
int index = to_sensor_dev_attr(attr)->index;
/*
* Index 0 (Local temp) is always signed
* Index 2 (Remote temp) has both signed and unsigned data
* use signed calculation for remote if signed bit is set
*/
if (index == 0 || data->regs[index] & 0x80)
temp = temp_from_reg_signed(data->regs[index],
data->regs[index + 1]);
else
temp = temp_from_reg_unsigned(data->regs[index + 2],
data->regs[index + 3]);
return snprintf(buf, PAGE_SIZE - 1, "%d\n", temp);
}
static ssize_t show_limit(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct lm95245_data *data = lm95245_update_device(dev);
int index = to_sensor_dev_attr(attr)->index;
return snprintf(buf, PAGE_SIZE - 1, "%d\n",
data->regs[index] * 1000);
}
static ssize_t set_limit(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{ {
struct lm95245_data *data = dev_get_drvdata(dev); struct lm95245_data *data = dev_get_drvdata(dev);
int index = to_sensor_dev_attr(attr)->index; struct regmap *regmap = data->regmap;
struct i2c_client *client = data->client; int ret, regl, regh, regvall, regvalh;
unsigned long val;
if (kstrtoul(buf, 10, &val) < 0) switch (attr) {
return -EINVAL; case hwmon_temp_input:
regl = channel ? LM95245_REG_R_REMOTE_TEMPL_S :
val /= 1000; LM95245_REG_R_LOCAL_TEMPL_S;
regh = channel ? LM95245_REG_R_REMOTE_TEMPH_S :
val = clamp_val(val, 0, (index == 6 ? 127 : 255)); LM95245_REG_R_LOCAL_TEMPH_S;
ret = regmap_read(regmap, regl, &regvall);
mutex_lock(&data->update_lock); if (ret < 0)
return ret;
data->valid = 0; ret = regmap_read(regmap, regh, &regvalh);
if (ret < 0)
i2c_smbus_write_byte_data(client, lm95245_reg_address[index], val); return ret;
/*
mutex_unlock(&data->update_lock); * Local temp is always signed.
* Remote temp has both signed and unsigned data.
return count; * Use signed calculation for remote if signed bit is set
* or if reported temperature is below signed limit.
*/
if (!channel || (regvalh & 0x80) || regvalh < 0x7f) {
*val = temp_from_reg_signed(regvalh, regvall);
return 0;
}
ret = regmap_read(regmap, LM95245_REG_R_REMOTE_TEMPL_U,
&regvall);
if (ret < 0)
return ret;
ret = regmap_read(regmap, LM95245_REG_R_REMOTE_TEMPH_U,
&regvalh);
if (ret < 0)
return ret;
*val = temp_from_reg_unsigned(regvalh, regvall);
return 0;
case hwmon_temp_max:
ret = regmap_read(regmap, LM95245_REG_RW_REMOTE_OS_LIMIT,
&regvalh);
if (ret < 0)
return ret;
*val = regvalh * 1000;
return 0;
case hwmon_temp_crit:
regh = channel ? LM95245_REG_RW_REMOTE_TCRIT_LIMIT :
LM95245_REG_RW_LOCAL_OS_TCRIT_LIMIT;
ret = regmap_read(regmap, regh, &regvalh);
if (ret < 0)
return ret;
*val = regvalh * 1000;
return 0;
case hwmon_temp_max_hyst:
ret = regmap_read(regmap, LM95245_REG_RW_REMOTE_OS_LIMIT,
&regvalh);
if (ret < 0)
return ret;
ret = regmap_read(regmap, LM95245_REG_RW_COMMON_HYSTERESIS,
&regvall);
if (ret < 0)
return ret;
*val = (regvalh - regvall) * 1000;
return 0;
case hwmon_temp_crit_hyst:
regh = channel ? LM95245_REG_RW_REMOTE_TCRIT_LIMIT :
LM95245_REG_RW_LOCAL_OS_TCRIT_LIMIT;
ret = regmap_read(regmap, regh, &regvalh);
if (ret < 0)
return ret;
ret = regmap_read(regmap, LM95245_REG_RW_COMMON_HYSTERESIS,
&regvall);
if (ret < 0)
return ret;
*val = (regvalh - regvall) * 1000;
return 0;
case hwmon_temp_type:
ret = regmap_read(regmap, LM95245_REG_RW_CONFIG2, &regvalh);
if (ret < 0)
return ret;
*val = (regvalh & CFG2_REMOTE_TT) ? 1 : 2;
return 0;
case hwmon_temp_offset:
ret = regmap_read(regmap, LM95245_REG_RW_REMOTE_OFFL,
&regvall);
if (ret < 0)
return ret;
ret = regmap_read(regmap, LM95245_REG_RW_REMOTE_OFFH,
&regvalh);
if (ret < 0)
return ret;
*val = temp_from_reg_signed(regvalh, regvall);
return 0;
case hwmon_temp_max_alarm:
ret = regmap_read(regmap, LM95245_REG_R_STATUS1, &regvalh);
if (ret < 0)
return ret;
*val = !!(regvalh & STATUS1_ROS);
return 0;
case hwmon_temp_crit_alarm:
ret = regmap_read(regmap, LM95245_REG_R_STATUS1, &regvalh);
if (ret < 0)
return ret;
*val = !!(regvalh & (channel ? STATUS1_RTCRIT : STATUS1_LOC));
return 0;
case hwmon_temp_fault:
ret = regmap_read(regmap, LM95245_REG_R_STATUS1, &regvalh);
if (ret < 0)
return ret;
*val = !!(regvalh & STATUS1_DIODE_FAULT);
return 0;
default:
return -EOPNOTSUPP;
}
} }
static ssize_t show_crit_hyst(struct device *dev, struct device_attribute *attr, static int lm95245_write_temp(struct device *dev, u32 attr, int channel,
char *buf) long val)
{
struct lm95245_data *data = lm95245_update_device(dev);
int index = to_sensor_dev_attr(attr)->index;
int hyst = data->regs[index] - data->regs[8];
return snprintf(buf, PAGE_SIZE - 1, "%d\n", hyst * 1000);
}
static ssize_t set_crit_hyst(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{ {
struct lm95245_data *data = dev_get_drvdata(dev); struct lm95245_data *data = dev_get_drvdata(dev);
int index = to_sensor_dev_attr(attr)->index; struct regmap *regmap = data->regmap;
struct i2c_client *client = data->client; unsigned int regval;
unsigned long val; int ret, reg;
int hyst, limit;
if (kstrtoul(buf, 10, &val) < 0) switch (attr) {
return -EINVAL; case hwmon_temp_max:
val = clamp_val(val / 1000, 0, 255);
mutex_lock(&data->update_lock); ret = regmap_write(regmap, LM95245_REG_RW_REMOTE_OS_LIMIT, val);
return ret;
limit = i2c_smbus_read_byte_data(client, lm95245_reg_address[index]); case hwmon_temp_crit:
hyst = limit - val / 1000; reg = channel ? LM95245_REG_RW_REMOTE_TCRIT_LIMIT :
hyst = clamp_val(hyst, 0, 31); LM95245_REG_RW_LOCAL_OS_TCRIT_LIMIT;
data->regs[8] = hyst; val = clamp_val(val / 1000, 0, channel ? 255 : 127);
ret = regmap_write(regmap, reg, val);
/* shared crit hysteresis */ return ret;
i2c_smbus_write_byte_data(client, LM95245_REG_RW_COMMON_HYSTERESIS, case hwmon_temp_crit_hyst:
hyst); mutex_lock(&data->update_lock);
ret = regmap_read(regmap, LM95245_REG_RW_LOCAL_OS_TCRIT_LIMIT,
mutex_unlock(&data->update_lock); &regval);
if (ret < 0) {
return count; mutex_unlock(&data->update_lock);
return ret;
}
/* Clamp to reasonable range to prevent overflow */
val = clamp_val(val, -1000000, 1000000);
val = regval - val / 1000;
val = clamp_val(val, 0, 31);
ret = regmap_write(regmap, LM95245_REG_RW_COMMON_HYSTERESIS,
val);
mutex_unlock(&data->update_lock);
return ret;
case hwmon_temp_offset:
val = clamp_val(val, -128000, 127875);
val = val * 256 / 1000;
mutex_lock(&data->update_lock);
ret = regmap_write(regmap, LM95245_REG_RW_REMOTE_OFFL,
val & 0xe0);
if (ret < 0) {
mutex_unlock(&data->update_lock);
return ret;
}
ret = regmap_write(regmap, LM95245_REG_RW_REMOTE_OFFH,
(val >> 8) & 0xff);
mutex_unlock(&data->update_lock);
return ret;
case hwmon_temp_type:
if (val != 1 && val != 2)
return -EINVAL;
ret = regmap_update_bits(regmap, LM95245_REG_RW_CONFIG2,
CFG2_REMOTE_TT,
val == 1 ? CFG2_REMOTE_TT : 0);
return ret;
default:
return -EOPNOTSUPP;
}
} }
static ssize_t show_type(struct device *dev, struct device_attribute *attr, static int lm95245_read_chip(struct device *dev, u32 attr, int channel,
char *buf) long *val)
{ {
struct lm95245_data *data = dev_get_drvdata(dev); struct lm95245_data *data = dev_get_drvdata(dev);
return snprintf(buf, PAGE_SIZE - 1, switch (attr) {
data->config2 & CFG2_REMOTE_TT ? "1\n" : "2\n"); case hwmon_chip_update_interval:
*val = data->interval;
return 0;
default:
return -EOPNOTSUPP;
}
} }
static ssize_t set_type(struct device *dev, struct device_attribute *attr, static int lm95245_write_chip(struct device *dev, u32 attr, int channel,
const char *buf, size_t count) long val)
{ {
struct lm95245_data *data = dev_get_drvdata(dev); struct lm95245_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client; int ret;
unsigned long val;
if (kstrtoul(buf, 10, &val) < 0) switch (attr) {
return -EINVAL; case hwmon_chip_update_interval:
if (val != 1 && val != 2) mutex_lock(&data->update_lock);
return -EINVAL; ret = lm95245_set_conversion_rate(data, val);
mutex_unlock(&data->update_lock);
mutex_lock(&data->update_lock); return ret;
default:
if (val == 1) return -EOPNOTSUPP;
data->config2 |= CFG2_REMOTE_TT; }
else
data->config2 &= ~CFG2_REMOTE_TT;
data->valid = 0;
i2c_smbus_write_byte_data(client, LM95245_REG_RW_CONFIG2,
data->config2);
mutex_unlock(&data->update_lock);
return count;
} }
static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, static int lm95245_read(struct device *dev, enum hwmon_sensor_types type,
char *buf) u32 attr, int channel, long *val)
{ {
struct lm95245_data *data = lm95245_update_device(dev); switch (type) {
int index = to_sensor_dev_attr(attr)->index; case hwmon_chip:
return lm95245_read_chip(dev, attr, channel, val);
return snprintf(buf, PAGE_SIZE - 1, "%d\n", case hwmon_temp:
!!(data->regs[9] & index)); return lm95245_read_temp(dev, attr, channel, val);
default:
return -EOPNOTSUPP;
}
} }
static ssize_t show_interval(struct device *dev, struct device_attribute *attr, static int lm95245_write(struct device *dev, enum hwmon_sensor_types type,
char *buf) u32 attr, int channel, long val)
{ {
struct lm95245_data *data = lm95245_update_device(dev); switch (type) {
case hwmon_chip:
return snprintf(buf, PAGE_SIZE - 1, "%lu\n", data->interval); return lm95245_write_chip(dev, attr, channel, val);
case hwmon_temp:
return lm95245_write_temp(dev, attr, channel, val);
default:
return -EOPNOTSUPP;
}
} }
static ssize_t set_interval(struct device *dev, struct device_attribute *attr, static umode_t lm95245_temp_is_visible(const void *data, u32 attr, int channel)
const char *buf, size_t count)
{ {
struct lm95245_data *data = dev_get_drvdata(dev); switch (attr) {
struct i2c_client *client = data->client; case hwmon_temp_input:
unsigned long val; case hwmon_temp_max_alarm:
case hwmon_temp_max_hyst:
if (kstrtoul(buf, 10, &val) < 0) case hwmon_temp_crit_alarm:
return -EINVAL; case hwmon_temp_fault:
return S_IRUGO;
mutex_lock(&data->update_lock); case hwmon_temp_type:
case hwmon_temp_max:
data->interval = lm95245_set_conversion_rate(client, val); case hwmon_temp_crit:
case hwmon_temp_offset:
mutex_unlock(&data->update_lock); return S_IRUGO | S_IWUSR;
case hwmon_temp_crit_hyst:
return count; return (channel == 0) ? S_IRUGO | S_IWUSR : S_IRUGO;
default:
return 0;
}
} }
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_input, NULL, 0); static umode_t lm95245_is_visible(const void *data,
static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_limit, enum hwmon_sensor_types type,
set_limit, 6); u32 attr, int channel)
static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_crit_hyst, {
set_crit_hyst, 6); switch (type) {
static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, case hwmon_chip:
STATUS1_LOC); switch (attr) {
case hwmon_chip_update_interval:
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_input, NULL, 2); return S_IRUGO | S_IWUSR;
static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_limit, default:
set_limit, 7); return 0;
static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_crit_hyst, NULL, 7); }
static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, case hwmon_temp:
STATUS1_RTCRIT); return lm95245_temp_is_visible(data, attr, channel);
static SENSOR_DEVICE_ATTR(temp2_type, S_IWUSR | S_IRUGO, show_type, default:
set_type, 0); return 0;
static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, }
STATUS1_DIODE_FAULT); }
static DEVICE_ATTR(update_interval, S_IWUSR | S_IRUGO, show_interval,
set_interval);
static struct attribute *lm95245_attrs[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp1_crit.dev_attr.attr,
&sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_input.dev_attr.attr,
&sensor_dev_attr_temp2_crit.dev_attr.attr,
&sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
&sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_type.dev_attr.attr,
&sensor_dev_attr_temp2_fault.dev_attr.attr,
&dev_attr_update_interval.attr,
NULL
};
ATTRIBUTE_GROUPS(lm95245);
/* Return 0 if detection is successful, -ENODEV otherwise */ /* Return 0 if detection is successful, -ENODEV otherwise */
static int lm95245_detect(struct i2c_client *new_client, static int lm95245_detect(struct i2c_client *new_client,
@ -453,44 +487,130 @@ static int lm95245_detect(struct i2c_client *new_client,
return 0; return 0;
} }
static void lm95245_init_client(struct i2c_client *client, static int lm95245_init_client(struct lm95245_data *data)
struct lm95245_data *data)
{ {
data->interval = lm95245_read_conversion_rate(client); int ret;
data->config1 = i2c_smbus_read_byte_data(client, ret = lm95245_read_conversion_rate(data);
LM95245_REG_RW_CONFIG1); if (ret < 0)
data->config2 = i2c_smbus_read_byte_data(client, return ret;
LM95245_REG_RW_CONFIG2);
if (data->config1 & CFG_STOP) { return regmap_update_bits(data->regmap, LM95245_REG_RW_CONFIG1,
/* Clear the standby bit */ CFG_STOP, 0);
data->config1 &= ~CFG_STOP; }
i2c_smbus_write_byte_data(client, LM95245_REG_RW_CONFIG1,
data->config1); static bool lm95245_is_writeable_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case LM95245_REG_RW_CONFIG1:
case LM95245_REG_RW_CONVERS_RATE:
case LM95245_REG_W_ONE_SHOT:
case LM95245_REG_RW_CONFIG2:
case LM95245_REG_RW_REMOTE_OFFH:
case LM95245_REG_RW_REMOTE_OFFL:
case LM95245_REG_RW_REMOTE_OS_LIMIT:
case LM95245_REG_RW_LOCAL_OS_TCRIT_LIMIT:
case LM95245_REG_RW_REMOTE_TCRIT_LIMIT:
case LM95245_REG_RW_COMMON_HYSTERESIS:
return true;
default:
return false;
} }
} }
static bool lm95245_is_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case LM95245_REG_R_STATUS1:
case LM95245_REG_R_STATUS2:
case LM95245_REG_R_LOCAL_TEMPH_S:
case LM95245_REG_R_LOCAL_TEMPL_S:
case LM95245_REG_R_REMOTE_TEMPH_S:
case LM95245_REG_R_REMOTE_TEMPL_S:
case LM95245_REG_R_REMOTE_TEMPH_U:
case LM95245_REG_R_REMOTE_TEMPL_U:
return true;
default:
return false;
}
}
static const struct regmap_config lm95245_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.writeable_reg = lm95245_is_writeable_reg,
.volatile_reg = lm95245_is_volatile_reg,
.cache_type = REGCACHE_RBTREE,
.use_single_rw = true,
};
static const u32 lm95245_chip_config[] = {
HWMON_C_UPDATE_INTERVAL,
0
};
static const struct hwmon_channel_info lm95245_chip = {
.type = hwmon_chip,
.config = lm95245_chip_config,
};
static const u32 lm95245_temp_config[] = {
HWMON_T_INPUT | HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_CRIT_ALARM,
HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST | HWMON_T_CRIT |
HWMON_T_CRIT_HYST | HWMON_T_FAULT | HWMON_T_MAX_ALARM |
HWMON_T_CRIT_ALARM | HWMON_T_TYPE | HWMON_T_OFFSET,
0
};
static const struct hwmon_channel_info lm95245_temp = {
.type = hwmon_temp,
.config = lm95245_temp_config,
};
static const struct hwmon_channel_info *lm95245_info[] = {
&lm95245_chip,
&lm95245_temp,
NULL
};
static const struct hwmon_ops lm95245_hwmon_ops = {
.is_visible = lm95245_is_visible,
.read = lm95245_read,
.write = lm95245_write,
};
static const struct hwmon_chip_info lm95245_chip_info = {
.ops = &lm95245_hwmon_ops,
.info = lm95245_info,
};
static int lm95245_probe(struct i2c_client *client, static int lm95245_probe(struct i2c_client *client,
const struct i2c_device_id *id) const struct i2c_device_id *id)
{ {
struct device *dev = &client->dev; struct device *dev = &client->dev;
struct lm95245_data *data; struct lm95245_data *data;
struct device *hwmon_dev; struct device *hwmon_dev;
int ret;
data = devm_kzalloc(dev, sizeof(struct lm95245_data), GFP_KERNEL); data = devm_kzalloc(dev, sizeof(struct lm95245_data), GFP_KERNEL);
if (!data) if (!data)
return -ENOMEM; return -ENOMEM;
data->client = client; data->regmap = devm_regmap_init_i2c(client, &lm95245_regmap_config);
if (IS_ERR(data->regmap))
return PTR_ERR(data->regmap);
mutex_init(&data->update_lock); mutex_init(&data->update_lock);
/* Initialize the LM95245 chip */ /* Initialize the LM95245 chip */
lm95245_init_client(client, data); ret = lm95245_init_client(data);
if (ret < 0)
return ret;
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name,
data, data,
lm95245_groups); &lm95245_chip_info,
NULL);
return PTR_ERR_OR_ZERO(hwmon_dev); return PTR_ERR_OR_ZERO(hwmon_dev);
} }