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Explicit support for ina231 added to ina2xx driver 

Minor improvements, cleanup and fixes in various drivers
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Merge tag 'hwmon-for-linus-v3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull hwmon updates from Guenter Roeck:
 "Explicit support for ina231 added to ina2xx driver.

  Minor improvements, cleanup and fixes in various drivers"

* tag 'hwmon-for-linus-v3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (tmp102) add hibernation callbacks
  hwmon: (ads2828) Only keep data in device data structure if needed
  hwmon: (ads2828) Convert to use regmap
  hwmon: (jc42) Allow negative hysteresis temperatures
  hwmon: (adc128d818) Do proper sign extension
  hwmon: (ad7314) Do proper sign extension
  hwmon: (abx500) Fix format string warnings
  hwmon: (jc42) Fix integer overflow when writing hysteresis value
  hwmon: (jc42) Fix integer overflow
  hwmon: (jc42) Use sign_extend32 for sign extension
  hwmon: (ina2xx) Add ina231 compatible string
  hwmon: (ina2xx) use DIV_ROUND_CLOSEST() to avoid rounding errors
  hwmon: (ina2xx) remove an unnecessary dev_get_drvdata() result check
  hwmon: (ina2xx) implement update_interval attribute for ina226
  hwmon: (ina2xx) make shunt resistance configurable at run-time
  hwmon: (ina2xx) don't accept shunt values greater than the calibration factor
  hwmon: (ina2xx) remove a stray new line
  hwmon: (ina2xx) reinitialize the chip in case it's been reset
  hwmon: (nct7802) Constify struct regmap_config
This commit is contained in:
Linus Torvalds 2015-02-09 12:34:41 -08:00
parent 19acc77a36 dd378b1bca
commit 5c30c3cc6d
10 changed files with 381 additions and 141 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
Documentation/hwmon/ina2xx
View File

@ -26,6 +26,12 @@ Supported chips:
Datasheet: Publicly available at the Texas Instruments website
http://www.ti.com/
* Texas Instruments INA231
Prefix: 'ina231'
Addresses: I2C 0x40 - 0x4f
Datasheet: Publicly available at the Texas Instruments website
http://www.ti.com/
Author: Lothar Felten <l-felten@ti.com>
Description
@ -41,9 +47,18 @@ interface. The INA220 monitors both shunt drop and supply voltage.
The INA226 is a current shunt and power monitor with an I2C interface.
The INA226 monitors both a shunt voltage drop and bus supply voltage.
The INA230 is a high or low side current shunt and power monitor with an I2C
interface. The INA230 monitors both a shunt voltage drop and bus supply voltage.
INA230 and INA231 are high or low side current shunt and power monitors
with an I2C interface. The chips monitor both a shunt voltage drop and
bus supply voltage.
The shunt value in micro-ohms can be set via platform data or device tree.
Please refer to the Documentation/devicetree/bindings/i2c/ina2xx.txt for bindings
The shunt value in micro-ohms can be set via platform data or device tree at
compile-time or via the shunt_resistor attribute in sysfs at run-time. Please
refer to the Documentation/devicetree/bindings/i2c/ina2xx.txt for bindings
if the device tree is used.
Additionally ina226 supports update_interval attribute as described in
Documentation/hwmon/sysfs-interface. Internally the interval is the sum of
bus and shunt voltage conversion times multiplied by the averaging rate. We
don't touch the conversion times and only modify the number of averages. The
lower limit of the update_interval is 2 ms, the upper limit is 2253 ms.
The actual programmed interval may vary from the desired value.

5
drivers/hwmon/Kconfig
View File

@ -1389,6 +1389,7 @@ config SENSORS_ADS1015
config SENSORS_ADS7828
tristate "Texas Instruments ADS7828 and compatibles"
depends on I2C
select REGMAP_I2C
help
If you say yes here you get support for Texas Instruments ADS7828 and
ADS7830 8-channel A/D converters. ADS7828 resolution is 12-bit, while
@ -1430,8 +1431,8 @@ config SENSORS_INA2XX
tristate "Texas Instruments INA219 and compatibles"
depends on I2C
help
If you say yes here you get support for INA219, INA220, INA226, and
INA230 power monitor chips.
If you say yes here you get support for INA219, INA220, INA226,
INA230, and INA231 power monitor chips.
The INA2xx driver is configured for the default configuration of
the part as described in the datasheet.

6
drivers/hwmon/abx500.c
View File

@ -221,7 +221,7 @@ static ssize_t show_min(struct device *dev,
struct abx500_temp *data = dev_get_drvdata(dev);
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
return sprintf(buf, "%ld\n", data->min[attr->index]);
return sprintf(buf, "%lu\n", data->min[attr->index]);
}
static ssize_t show_max(struct device *dev,
@ -230,7 +230,7 @@ static ssize_t show_max(struct device *dev,
struct abx500_temp *data = dev_get_drvdata(dev);
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
return sprintf(buf, "%ld\n", data->max[attr->index]);
return sprintf(buf, "%lu\n", data->max[attr->index]);
}
static ssize_t show_max_hyst(struct device *dev,
@ -239,7 +239,7 @@ static ssize_t show_max_hyst(struct device *dev,
struct abx500_temp *data = dev_get_drvdata(dev);
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
return sprintf(buf, "%ld\n", data->max_hyst[attr->index]);
return sprintf(buf, "%lu\n", data->max_hyst[attr->index]);
}
static ssize_t show_min_alarm(struct device *dev,

5
drivers/hwmon/ad7314.c
View File

@ -16,6 +16,7 @@
#include <linux/err.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/bitops.h>
/*
* AD7314 temperature masks
@ -67,7 +68,7 @@ static ssize_t ad7314_show_temperature(struct device *dev,
switch (spi_get_device_id(chip->spi_dev)->driver_data) {
case ad7314:
data = (ret & AD7314_TEMP_MASK) >> AD7314_TEMP_SHIFT;
data = (data << 6) >> 6;
data = sign_extend32(data, 9);
return sprintf(buf, "%d\n", 250 * data);
case adt7301:
@ -78,7 +79,7 @@ static ssize_t ad7314_show_temperature(struct device *dev,
* register. 1lsb - 31.25 milli degrees centigrade
*/
data = ret & ADT7301_TEMP_MASK;
data = (data << 2) >> 2;
data = sign_extend32(data, 13);
return sprintf(buf, "%d\n",
DIV_ROUND_CLOSEST(data * 3125, 100));

3
drivers/hwmon/adc128d818.c
View File

@ -27,6 +27,7 @@
#include <linux/err.h>
#include <linux/regulator/consumer.h>
#include <linux/mutex.h>
#include <linux/bitops.h>
/* Addresses to scan
* The chip also supports addresses 0x35..0x37. Don't scan those addresses
@ -189,7 +190,7 @@ static ssize_t adc128_show_temp(struct device *dev,
if (IS_ERR(data))
return PTR_ERR(data);
temp = (data->temp[index] << 7) >> 7; /* sign extend */
temp = sign_extend32(data->temp[index], 8);
return sprintf(buf, "%d\n", temp * 500);/* 0.5 degrees C resolution */
}

102
drivers/hwmon/ads7828.c
View File

@ -30,14 +30,12 @@
#include <linux/hwmon-sysfs.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/jiffies.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/platform_data/ads7828.h>
#include <linux/regmap.h>
#include <linux/slab.h>
/* The ADS7828 registers */
#define ADS7828_NCH 8 /* 8 channels supported */
#define ADS7828_CMD_SD_SE 0x80 /* Single ended inputs */
#define ADS7828_CMD_PD1 0x04 /* Internal vref OFF && A/D ON */
#define ADS7828_CMD_PD3 0x0C /* Internal vref ON && A/D ON */
@ -50,17 +48,9 @@ enum ads7828_chips { ads7828, ads7830 };
/* Client specific data */
struct ads7828_data {
struct i2c_client *client;
struct mutex update_lock; /* Mutex protecting updates */
unsigned long last_updated; /* Last updated time (in jiffies) */
u16 adc_input[ADS7828_NCH]; /* ADS7828_NCH samples */
bool valid; /* Validity flag */
bool diff_input; /* Differential input */
bool ext_vref; /* External voltage reference */
unsigned int vref_mv; /* voltage reference value */
struct regmap *regmap;
u8 cmd_byte; /* Command byte without channel bits */
unsigned int lsb_resol; /* Resolution of the ADC sample LSB */
s32 (*read_channel)(const struct i2c_client *client, u8 command);
};
/* Command byte C2,C1,C0 - see datasheet */
@ -69,42 +59,22 @@ static inline u8 ads7828_cmd_byte(u8 cmd, int ch)
return cmd | (((ch >> 1) | (ch & 0x01) << 2) << 4);
}
/* Update data for the device (all 8 channels) */
static struct ads7828_data *ads7828_update_device(struct device *dev)
{
struct ads7828_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
|| !data->valid) {
unsigned int ch;
dev_dbg(&client->dev, "Starting ads7828 update\n");
for (ch = 0; ch < ADS7828_NCH; ch++) {
u8 cmd = ads7828_cmd_byte(data->cmd_byte, ch);
data->adc_input[ch] = data->read_channel(client, cmd);
}
data->last_updated = jiffies;
data->valid = true;
}
mutex_unlock(&data->update_lock);
return data;
}
/* sysfs callback function */
static ssize_t ads7828_show_in(struct device *dev, struct device_attribute *da,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
struct ads7828_data *data = ads7828_update_device(dev);
unsigned int value = DIV_ROUND_CLOSEST(data->adc_input[attr->index] *
data->lsb_resol, 1000);
struct ads7828_data *data = dev_get_drvdata(dev);
u8 cmd = ads7828_cmd_byte(data->cmd_byte, attr->index);
unsigned int regval;
int err;
return sprintf(buf, "%d\n", value);
err = regmap_read(data->regmap, cmd, &regval);
if (err < 0)
return err;
return sprintf(buf, "%d\n",
DIV_ROUND_CLOSEST(regval * data->lsb_resol, 1000));
}
static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, ads7828_show_in, NULL, 0);
@ -130,6 +100,16 @@ static struct attribute *ads7828_attrs[] = {
ATTRIBUTE_GROUPS(ads7828);
static const struct regmap_config ads2828_regmap_config = {
.reg_bits = 8,
.val_bits = 16,
};
static const struct regmap_config ads2830_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
};
static int ads7828_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@ -137,42 +117,40 @@ static int ads7828_probe(struct i2c_client *client,
struct ads7828_platform_data *pdata = dev_get_platdata(dev);
struct ads7828_data *data;
struct device *hwmon_dev;
unsigned int vref_mv = ADS7828_INT_VREF_MV;
bool diff_input = false;
bool ext_vref = false;
data = devm_kzalloc(dev, sizeof(struct ads7828_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
if (pdata) {
data->diff_input = pdata->diff_input;
data->ext_vref = pdata->ext_vref;
if (data->ext_vref)
data->vref_mv = pdata->vref_mv;
diff_input = pdata->diff_input;
ext_vref = pdata->ext_vref;
if (ext_vref && pdata->vref_mv)
vref_mv = pdata->vref_mv;
}
/* Bound Vref with min/max values if it was provided */
if (data->vref_mv)
data->vref_mv = clamp_val(data->vref_mv,
ADS7828_EXT_VREF_MV_MIN,
ADS7828_EXT_VREF_MV_MAX);
else
data->vref_mv = ADS7828_INT_VREF_MV;
/* Bound Vref with min/max values */
vref_mv = clamp_val(vref_mv, ADS7828_EXT_VREF_MV_MIN,
ADS7828_EXT_VREF_MV_MAX);
/* ADS7828 uses 12-bit samples, while ADS7830 is 8-bit */
if (id->driver_data == ads7828) {
data->lsb_resol = DIV_ROUND_CLOSEST(data->vref_mv * 1000, 4096);
data->read_channel = i2c_smbus_read_word_swapped;
data->lsb_resol = DIV_ROUND_CLOSEST(vref_mv * 1000, 4096);
data->regmap = devm_regmap_init_i2c(client,
&ads2828_regmap_config);
} else {
data->lsb_resol = DIV_ROUND_CLOSEST(data->vref_mv * 1000, 256);
data->read_channel = i2c_smbus_read_byte_data;
data->lsb_resol = DIV_ROUND_CLOSEST(vref_mv * 1000, 256);
data->regmap = devm_regmap_init_i2c(client,
&ads2830_regmap_config);
}
data->cmd_byte = data->ext_vref ? ADS7828_CMD_PD1 : ADS7828_CMD_PD3;
if (!data->diff_input)
data->cmd_byte = ext_vref ? ADS7828_CMD_PD1 : ADS7828_CMD_PD3;
if (!diff_input)
data->cmd_byte |= ADS7828_CMD_SD_SE;
data->client = client;
mutex_init(&data->update_lock);
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
data,
ads7828_groups);

346
drivers/hwmon/ina2xx.c
View File

@ -35,6 +35,7 @@
#include <linux/hwmon-sysfs.h>
#include <linux/jiffies.h>
#include <linux/of.h>
#include <linux/delay.h>
#include <linux/platform_data/ina2xx.h>
@ -51,7 +52,6 @@
#define INA226_ALERT_LIMIT 0x07
#define INA226_DIE_ID 0xFF
/* register count */
#define INA219_REGISTERS 6
#define INA226_REGISTERS 8
@ -64,6 +64,24 @@
/* worst case is 68.10 ms (~14.6Hz, ina219) */
#define INA2XX_CONVERSION_RATE 15
#define INA2XX_MAX_DELAY 69 /* worst case delay in ms */
#define INA2XX_RSHUNT_DEFAULT 10000
/* bit mask for reading the averaging setting in the configuration register */
#define INA226_AVG_RD_MASK 0x0E00
#define INA226_READ_AVG(reg) (((reg) & INA226_AVG_RD_MASK) >> 9)
#define INA226_SHIFT_AVG(val) ((val) << 9)
/* common attrs, ina226 attrs and NULL */
#define INA2XX_MAX_ATTRIBUTE_GROUPS 3
/*
* Both bus voltage and shunt voltage conversion times for ina226 are set
* to 0b0100 on POR, which translates to 2200 microseconds in total.
*/
#define INA226_TOTAL_CONV_TIME_DEFAULT 2200
enum ina2xx_ids { ina219, ina226 };
@ -81,11 +99,16 @@ struct ina2xx_data {
struct i2c_client *client;
const struct ina2xx_config *config;
long rshunt;
u16 curr_config;
struct mutex update_lock;
bool valid;
unsigned long last_updated;
int update_interval; /* in jiffies */
int kind;
const struct attribute_group *groups[INA2XX_MAX_ATTRIBUTE_GROUPS];
u16 regs[INA2XX_MAX_REGISTERS];
};
@ -110,34 +133,156 @@ static const struct ina2xx_config ina2xx_config[] = {
},
};
static struct ina2xx_data *ina2xx_update_device(struct device *dev)
/*
* Available averaging rates for ina226. The indices correspond with
* the bit values expected by the chip (according to the ina226 datasheet,
* table 3 AVG bit settings, found at
* http://www.ti.com/lit/ds/symlink/ina226.pdf.
*/
static const int ina226_avg_tab[] = { 1, 4, 16, 64, 128, 256, 512, 1024 };
static int ina226_avg_bits(int avg)
{
int i;
/* Get the closest average from the tab. */
for (i = 0; i < ARRAY_SIZE(ina226_avg_tab) - 1; i++) {
if (avg <= (ina226_avg_tab[i] + ina226_avg_tab[i + 1]) / 2)
break;
}
return i; /* Return 0b0111 for values greater than 1024. */
}
static int ina226_reg_to_interval(u16 config)
{
int avg = ina226_avg_tab[INA226_READ_AVG(config)];
/*
* Multiply the total conversion time by the number of averages.
* Return the result in milliseconds.
*/
return DIV_ROUND_CLOSEST(avg * INA226_TOTAL_CONV_TIME_DEFAULT, 1000);
}
static u16 ina226_interval_to_reg(int interval, u16 config)
{
int avg, avg_bits;
avg = DIV_ROUND_CLOSEST(interval * 1000,
INA226_TOTAL_CONV_TIME_DEFAULT);
avg_bits = ina226_avg_bits(avg);
return (config & ~INA226_AVG_RD_MASK) | INA226_SHIFT_AVG(avg_bits);
}
static void ina226_set_update_interval(struct ina2xx_data *data)
{
int ms;
ms = ina226_reg_to_interval(data->curr_config);
data->update_interval = msecs_to_jiffies(ms);
}
static int ina2xx_calibrate(struct ina2xx_data *data)
{
u16 val = DIV_ROUND_CLOSEST(data->config->calibration_factor,
data->rshunt);
return i2c_smbus_write_word_swapped(data->client,
INA2XX_CALIBRATION, val);
}
/*
* Initialize the configuration and calibration registers.
*/
static int ina2xx_init(struct ina2xx_data *data)
{
struct i2c_client *client = data->client;
int ret;
/* device configuration */
ret = i2c_smbus_write_word_swapped(client, INA2XX_CONFIG,
data->curr_config);
if (ret < 0)
return ret;
/*
* Set current LSB to 1mA, shunt is in uOhms
* (equation 13 in datasheet).
*/
return ina2xx_calibrate(data);
}
static int ina2xx_do_update(struct device *dev)
{
struct ina2xx_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
int i, rv, retry;
dev_dbg(&client->dev, "Starting ina2xx update\n");
for (retry = 5; retry; retry--) {
/* Read all registers */
for (i = 0; i < data->config->registers; i++) {
rv = i2c_smbus_read_word_swapped(client, i);
if (rv < 0)
return rv;
data->regs[i] = rv;
}
/*
* If the current value in the calibration register is 0, the
* power and current registers will also remain at 0. In case
* the chip has been reset let's check the calibration
* register and reinitialize if needed.
*/
if (data->regs[INA2XX_CALIBRATION] == 0) {
dev_warn(dev, "chip not calibrated, reinitializing\n");
rv = ina2xx_init(data);
if (rv < 0)
return rv;
/*
* Let's make sure the power and current registers
* have been updated before trying again.
*/
msleep(INA2XX_MAX_DELAY);
continue;
}
data->last_updated = jiffies;
data->valid = 1;
return 0;
}
/*
* If we're here then although all write operations succeeded, the
* chip still returns 0 in the calibration register. Nothing more we
* can do here.
*/
dev_err(dev, "unable to reinitialize the chip\n");
return -ENODEV;
}
static struct ina2xx_data *ina2xx_update_device(struct device *dev)
{
struct ina2xx_data *data = dev_get_drvdata(dev);
struct ina2xx_data *ret = data;
unsigned long after;
int rv;
mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated +
HZ / INA2XX_CONVERSION_RATE) || !data->valid) {
int i;
dev_dbg(&client->dev, "Starting ina2xx update\n");
/* Read all registers */
for (i = 0; i < data->config->registers; i++) {
int rv = i2c_smbus_read_word_swapped(client, i);
if (rv < 0) {
ret = ERR_PTR(rv);
goto abort;
}
data->regs[i] = rv;
}
data->last_updated = jiffies;
data->valid = 1;
after = data->last_updated + data->update_interval;
if (time_after(jiffies, after) || !data->valid) {
rv = ina2xx_do_update(dev);
if (rv < 0)
ret = ERR_PTR(rv);
}
abort:
mutex_unlock(&data->update_lock);
return ret;
}
@ -164,6 +309,10 @@ static int ina2xx_get_value(struct ina2xx_data *data, u8 reg)
/* signed register, LSB=1mA (selected), in mA */
val = (s16)data->regs[reg];
break;
case INA2XX_CALIBRATION:
val = DIV_ROUND_CLOSEST(data->config->calibration_factor,
data->regs[reg]);
break;
default:
/* programmer goofed */
WARN_ON_ONCE(1);
@ -187,6 +336,85 @@ static ssize_t ina2xx_show_value(struct device *dev,
ina2xx_get_value(data, attr->index));
}
static ssize_t ina2xx_set_shunt(struct device *dev,
struct device_attribute *da,
const char *buf, size_t count)
{
struct ina2xx_data *data = ina2xx_update_device(dev);
unsigned long val;
int status;
if (IS_ERR(data))
return PTR_ERR(data);
status = kstrtoul(buf, 10, &val);
if (status < 0)
return status;
if (val == 0 ||
/* Values greater than the calibration factor make no sense. */
val > data->config->calibration_factor)
return -EINVAL;
mutex_lock(&data->update_lock);
data->rshunt = val;
status = ina2xx_calibrate(data);
mutex_unlock(&data->update_lock);
if (status < 0)
return status;
return count;
}
static ssize_t ina226_set_interval(struct device *dev,
struct device_attribute *da,
const char *buf, size_t count)
{
struct ina2xx_data *data = dev_get_drvdata(dev);
unsigned long val;
int status;
status = kstrtoul(buf, 10, &val);
if (status < 0)
return status;
if (val > INT_MAX || val == 0)
return -EINVAL;
mutex_lock(&data->update_lock);
data->curr_config = ina226_interval_to_reg(val,
data->regs[INA2XX_CONFIG]);
status = i2c_smbus_write_word_swapped(data->client,
INA2XX_CONFIG,
data->curr_config);
ina226_set_update_interval(data);
/* Make sure the next access re-reads all registers. */
data->valid = 0;
mutex_unlock(&data->update_lock);
if (status < 0)
return status;
return count;
}
static ssize_t ina226_show_interval(struct device *dev,
struct device_attribute *da, char *buf)
{
struct ina2xx_data *data = ina2xx_update_device(dev);
if (IS_ERR(data))
return PTR_ERR(data);
/*
* We don't use data->update_interval here as we want to display
* the actual interval used by the chip and jiffies_to_msecs()
* doesn't seem to be accurate enough.
*/
return snprintf(buf, PAGE_SIZE, "%d\n",
ina226_reg_to_interval(data->regs[INA2XX_CONFIG]));
}
/* shunt voltage */
static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, ina2xx_show_value, NULL,
INA2XX_SHUNT_VOLTAGE);
@ -203,15 +431,37 @@ static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, ina2xx_show_value, NULL,
static SENSOR_DEVICE_ATTR(power1_input, S_IRUGO, ina2xx_show_value, NULL,
INA2XX_POWER);
/* shunt resistance */
static SENSOR_DEVICE_ATTR(shunt_resistor, S_IRUGO | S_IWUSR,
ina2xx_show_value, ina2xx_set_shunt,
INA2XX_CALIBRATION);
/* update interval (ina226 only) */
static SENSOR_DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR,
ina226_show_interval, ina226_set_interval, 0);
/* pointers to created device attributes */
static struct attribute *ina2xx_attrs[] = {
&sensor_dev_attr_in0_input.dev_attr.attr,
&sensor_dev_attr_in1_input.dev_attr.attr,
&sensor_dev_attr_curr1_input.dev_attr.attr,
&sensor_dev_attr_power1_input.dev_attr.attr,
&sensor_dev_attr_shunt_resistor.dev_attr.attr,
NULL,
};
ATTRIBUTE_GROUPS(ina2xx);
static const struct attribute_group ina2xx_group = {
.attrs = ina2xx_attrs,
};
static struct attribute *ina226_attrs[] = {
&sensor_dev_attr_update_interval.dev_attr.attr,
NULL,
};
static const struct attribute_group ina226_group = {
.attrs = ina226_attrs,
};
static int ina2xx_probe(struct i2c_client *client,
const struct i2c_device_id *id)
@ -221,9 +471,8 @@ static int ina2xx_probe(struct i2c_client *client,
struct device *dev = &client->dev;
struct ina2xx_data *data;
struct device *hwmon_dev;
long shunt = 10000; /* default shunt value 10mOhms */
u32 val;
int ret;
int ret, group = 0;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA))
return -ENODEV;
@ -234,50 +483,52 @@ static int ina2xx_probe(struct i2c_client *client,
if (dev_get_platdata(dev)) {
pdata = dev_get_platdata(dev);
shunt = pdata->shunt_uohms;
data->rshunt = pdata->shunt_uohms;
} else if (!of_property_read_u32(dev->of_node,
"shunt-resistor", &val)) {
shunt = val;
data->rshunt = val;
} else {
data->rshunt = INA2XX_RSHUNT_DEFAULT;
}
if (shunt <= 0)
return -ENODEV;
/* set the device type */
data->kind = id->driver_data;
data->config = &ina2xx_config[data->kind];
/* device configuration */
ret = i2c_smbus_write_word_swapped(client, INA2XX_CONFIG,
data->config->config_default);
if (ret < 0) {
dev_err(dev,
"error writing to the config register: %d", ret);
return -ENODEV;
}
data->curr_config = data->config->config_default;
data->client = client;
/*
* Set current LSB to 1mA, shunt is in uOhms
* (equation 13 in datasheet).
* Ina226 has a variable update_interval. For ina219 we
* use a constant value.
*/
ret = i2c_smbus_write_word_swapped(client, INA2XX_CALIBRATION,
data->config->calibration_factor / shunt);
if (data->kind == ina226)
ina226_set_update_interval(data);
else
data->update_interval = HZ / INA2XX_CONVERSION_RATE;
if (data->rshunt <= 0 ||
data->rshunt > data->config->calibration_factor)
return -ENODEV;
ret = ina2xx_init(data);
if (ret < 0) {
dev_err(dev,
"error writing to the calibration register: %d", ret);
dev_err(dev, "error configuring the device: %d\n", ret);
return -ENODEV;
}
data->client = client;
mutex_init(&data->update_lock);
data->groups[group++] = &ina2xx_group;
if (data->kind == ina226)
data->groups[group++] = &ina226_group;
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
data, ina2xx_groups);
data, data->groups);
if (IS_ERR(hwmon_dev))
return PTR_ERR(hwmon_dev);
dev_info(dev, "power monitor %s (Rshunt = %li uOhm)\n",
id->name, shunt);
id->name, data->rshunt);
return 0;
}
@ -287,6 +538,7 @@ static const struct i2c_device_id ina2xx_id[] = {
{ "ina220", ina219 },
{ "ina226", ina226 },
{ "ina230", ina226 },
{ "ina231", ina226 },
{ }
};
MODULE_DEVICE_TABLE(i2c, ina2xx_id);

15
drivers/hwmon/jc42.c
View File

@ -201,7 +201,7 @@ struct jc42_data {
#define JC42_TEMP_MIN 0
#define JC42_TEMP_MAX 125000
static u16 jc42_temp_to_reg(int temp, bool extended)
static u16 jc42_temp_to_reg(long temp, bool extended)
{
int ntemp = clamp_val(temp,
extended ? JC42_TEMP_MIN_EXTENDED :
@ -213,11 +213,7 @@ static u16 jc42_temp_to_reg(int temp, bool extended)
static int jc42_temp_from_reg(s16 reg)
{
reg &= 0x1fff;
/* sign extend register */
if (reg & 0x1000)
reg |= 0xf000;
reg = sign_extend32(reg, 12);
/* convert from 0.0625 to 0.001 resolution */
return reg * 125 / 2;
@ -308,15 +304,18 @@ static ssize_t set_temp_crit_hyst(struct device *dev,
const char *buf, size_t count)
{
struct jc42_data *data = dev_get_drvdata(dev);
unsigned long val;
long val;
int diff, hyst;
int err;
int ret = count;
if (kstrtoul(buf, 10, &val) < 0)
if (kstrtol(buf, 10, &val) < 0)
return -EINVAL;
val = clamp_val(val, (data->extended ? JC42_TEMP_MIN_EXTENDED :
JC42_TEMP_MIN) - 6000, JC42_TEMP_MAX);
diff = jc42_temp_from_reg(data->temp[t_crit]) - val;
hyst = 0;
if (diff > 0) {
if (diff < 2250)

2
drivers/hwmon/nct7802.c
View File

@ -779,7 +779,7 @@ static bool nct7802_regmap_is_volatile(struct device *dev, unsigned int reg)
return reg != REG_BANK && reg <= 0x20;
}
static struct regmap_config nct7802_regmap_config = {
static const struct regmap_config nct7802_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.cache_type = REGCACHE_RBTREE,

15
drivers/hwmon/tmp102.c
View File

@ -253,7 +253,7 @@ static int tmp102_remove(struct i2c_client *client)
return 0;
}
#ifdef CONFIG_PM
#ifdef CONFIG_PM_SLEEP
static int tmp102_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
@ -279,17 +279,10 @@ static int tmp102_resume(struct device *dev)
config &= ~TMP102_CONF_SD;
return i2c_smbus_write_word_swapped(client, TMP102_CONF_REG, config);
}
static const struct dev_pm_ops tmp102_dev_pm_ops = {
.suspend = tmp102_suspend,
.resume = tmp102_resume,
};
#define TMP102_DEV_PM_OPS (&tmp102_dev_pm_ops)
#else
#define TMP102_DEV_PM_OPS NULL
#endif /* CONFIG_PM */
static SIMPLE_DEV_PM_OPS(tmp102_dev_pm_ops, tmp102_suspend, tmp102_resume);
static const struct i2c_device_id tmp102_id[] = {
{ "tmp102", 0 },
{ }
@ -298,7 +291,7 @@ MODULE_DEVICE_TABLE(i2c, tmp102_id);
static struct i2c_driver tmp102_driver = {
.driver.name = DRIVER_NAME,
.driver.pm = TMP102_DEV_PM_OPS,
.driver.pm = &tmp102_dev_pm_ops,
.probe = tmp102_probe,
.remove = tmp102_remove,
.id_table = tmp102_id,