New driver for Sensirion SHTC1 humidity / temperature sensor

Convert ltc4151 and vexpress drivers to use devm functions
 Drop generic chip detection from lm85 driver
 Avoid forward declarations in atxp1 driver
 Fix sign extensions in ina2xx driver
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Merge tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull hwmon updates from Guenter Roeck:
 - new driver for Sensirion SHTC1 humidity / temperature sensor
 - convert ltc4151 and vexpress drivers to use devm functions
 - drop generic chip detection from lm85 driver
 - avoid forward declarations in atxp1 driver
 - fix sign extensions in ina2xx driver

* tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: vexpress: Use devm helper for hwmon device registration
  hwmon: (atxp1) Avoid forward declaration
  hwmon: add support for Sensirion SHTC1 sensor
  hwmon: (ltc4151) Convert to devm_hwmon_device_register_with_groups
  hwmon: (lm85) Drop generic detection
  hwmon: (ina2xx) Cast to s16 on shunt and current regs
This commit is contained in:
Linus Torvalds 2014-06-14 14:43:23 -07:00
commit 503698e12d
10 changed files with 401 additions and 142 deletions

43
Documentation/hwmon/shtc1 Normal file
View File

@ -0,0 +1,43 @@
Kernel driver shtc1
===================
Supported chips:
* Sensirion SHTC1
Prefix: 'shtc1'
Addresses scanned: none
Datasheet: http://www.sensirion.com/file/datasheet_shtc1
* Sensirion SHTW1
Prefix: 'shtw1'
Addresses scanned: none
Datasheet: Not publicly available
Author:
Johannes Winkelmann <johannes.winkelmann@sensirion.com>
Description
-----------
This driver implements support for the Sensirion SHTC1 chip, a humidity and
temperature sensor. Temperature is measured in degrees celsius, relative
humidity is expressed as a percentage. Driver can be used as well for SHTW1
chip, which has the same electrical interface.
The device communicates with the I2C protocol. All sensors are set to I2C
address 0x70. See Documentation/i2c/instantiating-devices for methods to
instantiate the device.
There are two options configurable by means of shtc1_platform_data:
1. blocking (pull the I2C clock line down while performing the measurement) or
non-blocking mode. Blocking mode will guarantee the fastest result but
the I2C bus will be busy during that time. By default, non-blocking mode
is used. Make sure clock-stretching works properly on your device if you
want to use blocking mode.
2. high or low accuracy. High accuracy is used by default and using it is
strongly recommended.
sysfs-Interface
---------------
temp1_input - temperature input
humidity1_input - humidity input

View File

@ -1124,6 +1124,16 @@ config SENSORS_SHT21
This driver can also be built as a module. If so, the module
will be called sht21.
config SENSORS_SHTC1
tristate "Sensiron humidity and temperature sensors. SHTC1 and compat."
depends on I2C
help
If you say yes here you get support for the Sensiron SHTC1 and SHTW1
humidity and temperature sensors.
This driver can also be built as a module. If so, the module
will be called shtc1.
config SENSORS_S3C
tristate "Samsung built-in ADC"
depends on S3C_ADC

View File

@ -126,6 +126,7 @@ obj-$(CONFIG_SENSORS_SCH5627) += sch5627.o
obj-$(CONFIG_SENSORS_SCH5636) += sch5636.o
obj-$(CONFIG_SENSORS_SHT15) += sht15.o
obj-$(CONFIG_SENSORS_SHT21) += sht21.o
obj-$(CONFIG_SENSORS_SHTC1) += shtc1.o
obj-$(CONFIG_SENSORS_SIS5595) += sis5595.o
obj-$(CONFIG_SENSORS_SMM665) += smm665.o
obj-$(CONFIG_SENSORS_SMSC47B397)+= smsc47b397.o

View File

@ -45,30 +45,6 @@ MODULE_AUTHOR("Sebastian Witt <se.witt@gmx.net>");
static const unsigned short normal_i2c[] = { 0x37, 0x4e, I2C_CLIENT_END };
static int atxp1_probe(struct i2c_client *client,
const struct i2c_device_id *id);
static int atxp1_remove(struct i2c_client *client);
static struct atxp1_data *atxp1_update_device(struct device *dev);
static int atxp1_detect(struct i2c_client *client, struct i2c_board_info *info);
static const struct i2c_device_id atxp1_id[] = {
{ "atxp1", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, atxp1_id);
static struct i2c_driver atxp1_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "atxp1",
},
.probe = atxp1_probe,
.remove = atxp1_remove,
.id_table = atxp1_id,
.detect = atxp1_detect,
.address_list = normal_i2c,
};
struct atxp1_data {
struct device *hwmon_dev;
struct mutex update_lock;
@ -386,4 +362,22 @@ static int atxp1_remove(struct i2c_client *client)
return 0;
};
static const struct i2c_device_id atxp1_id[] = {
{ "atxp1", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, atxp1_id);
static struct i2c_driver atxp1_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "atxp1",
},
.probe = atxp1_probe,
.remove = atxp1_remove,
.id_table = atxp1_id,
.detect = atxp1_detect,
.address_list = normal_i2c,
};
module_i2c_driver(atxp1_driver);

View File

@ -148,7 +148,8 @@ static int ina2xx_get_value(struct ina2xx_data *data, u8 reg)
switch (reg) {
case INA2XX_SHUNT_VOLTAGE:
val = DIV_ROUND_CLOSEST(data->regs[reg],
/* signed register */
val = DIV_ROUND_CLOSEST((s16)data->regs[reg],
data->config->shunt_div);
break;
case INA2XX_BUS_VOLTAGE:
@ -160,8 +161,8 @@ static int ina2xx_get_value(struct ina2xx_data *data, u8 reg)
val = data->regs[reg] * data->config->power_lsb;
break;
case INA2XX_CURRENT:
/* LSB=1mA (selected). Is in mA */
val = data->regs[reg];
/* signed register, LSB=1mA (selected), in mA */
val = (s16)data->regs[reg];
break;
default:
/* programmer goofed */

View File

@ -5,7 +5,7 @@
* Copyright (c) 2002, 2003 Philip Pokorny <ppokorny@penguincomputing.com>
* Copyright (c) 2003 Margit Schubert-While <margitsw@t-online.de>
* Copyright (c) 2004 Justin Thiessen <jthiessen@penguincomputing.com>
* Copyright (C) 2007--2009 Jean Delvare <jdelvare@suse.de>
* Copyright (C) 2007--2014 Jean Delvare <jdelvare@suse.de>
*
* Chip details at <http://www.national.com/ds/LM/LM85.pdf>
*
@ -39,7 +39,7 @@
static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
enum chips {
any_chip, lm85b, lm85c,
lm85,
adm1027, adt7463, adt7468,
emc6d100, emc6d102, emc6d103, emc6d103s
};
@ -75,9 +75,6 @@ enum chips {
#define LM85_COMPANY_NATIONAL 0x01
#define LM85_COMPANY_ANALOG_DEV 0x41
#define LM85_COMPANY_SMSC 0x5c
#define LM85_VERSTEP_VMASK 0xf0
#define LM85_VERSTEP_GENERIC 0x60
#define LM85_VERSTEP_GENERIC2 0x70
#define LM85_VERSTEP_LM85C 0x60
#define LM85_VERSTEP_LM85B 0x62
#define LM85_VERSTEP_LM96000_1 0x68
@ -351,9 +348,9 @@ static const struct i2c_device_id lm85_id[] = {
{ "adm1027", adm1027 },
{ "adt7463", adt7463 },
{ "adt7468", adt7468 },
{ "lm85", any_chip },
{ "lm85b", lm85b },
{ "lm85c", lm85c },
{ "lm85", lm85 },
{ "lm85b", lm85 },
{ "lm85c", lm85 },
{ "emc6d100", emc6d100 },
{ "emc6d101", emc6d100 },
{ "emc6d102", emc6d102 },
@ -1281,7 +1278,7 @@ static int lm85_detect(struct i2c_client *client, struct i2c_board_info *info)
{
struct i2c_adapter *adapter = client->adapter;
int address = client->addr;
const char *type_name;
const char *type_name = NULL;
int company, verstep;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
@ -1297,16 +1294,6 @@ static int lm85_detect(struct i2c_client *client, struct i2c_board_info *info)
"Detecting device at 0x%02x with COMPANY: 0x%02x and VERSTEP: 0x%02x\n",
address, company, verstep);
/* All supported chips have the version in common */
if ((verstep & LM85_VERSTEP_VMASK) != LM85_VERSTEP_GENERIC &&
(verstep & LM85_VERSTEP_VMASK) != LM85_VERSTEP_GENERIC2) {
dev_dbg(&adapter->dev,
"Autodetection failed: unsupported version\n");
return -ENODEV;
}
type_name = "lm85";
/* Now, refine the detection */
if (company == LM85_COMPANY_NATIONAL) {
switch (verstep) {
case LM85_VERSTEP_LM85C:
@ -1323,6 +1310,7 @@ static int lm85_detect(struct i2c_client *client, struct i2c_board_info *info)
"Found Winbond WPCD377I, ignoring\n");
return -ENODEV;
}
type_name = "lm85";
break;
}
} else if (company == LM85_COMPANY_ANALOG_DEV) {
@ -1357,12 +1345,11 @@ static int lm85_detect(struct i2c_client *client, struct i2c_board_info *info)
type_name = "emc6d103s";
break;
}
} else {
dev_dbg(&adapter->dev,
"Autodetection failed: unknown vendor\n");
return -ENODEV;
}
if (!type_name)
return -ENODEV;
strlcpy(info->type, type_name, I2C_NAME_SIZE);
return 0;

View File

@ -47,7 +47,7 @@
#define LTC4151_ADIN_L 0x05
struct ltc4151_data {
struct device *hwmon_dev;
struct i2c_client *client;
struct mutex update_lock;
bool valid;
@ -59,8 +59,8 @@ struct ltc4151_data {
static struct ltc4151_data *ltc4151_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct ltc4151_data *data = i2c_get_clientdata(client);
struct ltc4151_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
struct ltc4151_data *ret = data;
mutex_lock(&data->update_lock);
@ -159,7 +159,7 @@ static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, ltc4151_show_value, NULL,
* Finally, construct an array of pointers to members of the above objects,
* as required for sysfs_create_group()
*/
static struct attribute *ltc4151_attributes[] = {
static struct attribute *ltc4151_attrs[] = {
&sensor_dev_attr_in1_input.dev_attr.attr,
&sensor_dev_attr_in2_input.dev_attr.attr,
@ -167,54 +167,30 @@ static struct attribute *ltc4151_attributes[] = {
NULL,
};
static const struct attribute_group ltc4151_group = {
.attrs = ltc4151_attributes,
};
ATTRIBUTE_GROUPS(ltc4151);
static int ltc4151_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct i2c_adapter *adapter = client->adapter;
struct device *dev = &client->dev;
struct ltc4151_data *data;
int ret;
struct device *hwmon_dev;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
i2c_set_clientdata(client, data);
data->client = client;
mutex_init(&data->update_lock);
/* Register sysfs hooks */
ret = sysfs_create_group(&client->dev.kobj, &ltc4151_group);
if (ret)
return ret;
data->hwmon_dev = hwmon_device_register(&client->dev);
if (IS_ERR(data->hwmon_dev)) {
ret = PTR_ERR(data->hwmon_dev);
goto out_hwmon_device_register;
}
return 0;
out_hwmon_device_register:
sysfs_remove_group(&client->dev.kobj, &ltc4151_group);
return ret;
}
static int ltc4151_remove(struct i2c_client *client)
{
struct ltc4151_data *data = i2c_get_clientdata(client);
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &ltc4151_group);
return 0;
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
data,
ltc4151_groups);
return PTR_ERR_OR_ZERO(hwmon_dev);
}
static const struct i2c_device_id ltc4151_id[] = {
@ -229,7 +205,6 @@ static struct i2c_driver ltc4151_driver = {
.name = "ltc4151",
},
.probe = ltc4151_probe,
.remove = ltc4151_remove,
.id_table = ltc4151_id,
};

251
drivers/hwmon/shtc1.c Normal file
View File

@ -0,0 +1,251 @@
/* Sensirion SHTC1 humidity and temperature sensor driver
*
* Copyright (C) 2014 Sensirion AG, Switzerland
* Author: Johannes Winkelmann <johannes.winkelmann@sensirion.com>
*
* 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.
*
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/delay.h>
#include <linux/platform_data/shtc1.h>
/* commands (high precision mode) */
static const unsigned char shtc1_cmd_measure_blocking_hpm[] = { 0x7C, 0xA2 };
static const unsigned char shtc1_cmd_measure_nonblocking_hpm[] = { 0x78, 0x66 };
/* commands (low precision mode) */
static const unsigned char shtc1_cmd_measure_blocking_lpm[] = { 0x64, 0x58 };
static const unsigned char shtc1_cmd_measure_nonblocking_lpm[] = { 0x60, 0x9c };
/* command for reading the ID register */
static const unsigned char shtc1_cmd_read_id_reg[] = { 0xef, 0xc8 };
/* constants for reading the ID register */
#define SHTC1_ID 0x07
#define SHTC1_ID_REG_MASK 0x1f
/* delays for non-blocking i2c commands, both in us */
#define SHTC1_NONBLOCKING_WAIT_TIME_HPM 14400
#define SHTC1_NONBLOCKING_WAIT_TIME_LPM 1000
#define SHTC1_CMD_LENGTH 2
#define SHTC1_RESPONSE_LENGTH 6
struct shtc1_data {
struct i2c_client *client;
struct mutex update_lock;
bool valid;
unsigned long last_updated; /* in jiffies */
const unsigned char *command;
unsigned int nonblocking_wait_time; /* in us */
struct shtc1_platform_data setup;
int temperature; /* 1000 * temperature in dgr C */
int humidity; /* 1000 * relative humidity in %RH */
};
static int shtc1_update_values(struct i2c_client *client,
struct shtc1_data *data,
char *buf, int bufsize)
{
int ret = i2c_master_send(client, data->command, SHTC1_CMD_LENGTH);
if (ret != SHTC1_CMD_LENGTH) {
dev_err(&client->dev, "failed to send command: %d\n", ret);
return ret < 0 ? ret : -EIO;
}
/*
* In blocking mode (clock stretching mode) the I2C bus
* is blocked for other traffic, thus the call to i2c_master_recv()
* will wait until the data is ready. For non blocking mode, we
* have to wait ourselves.
*/
if (!data->setup.blocking_io)
usleep_range(data->nonblocking_wait_time,
data->nonblocking_wait_time + 1000);
ret = i2c_master_recv(client, buf, bufsize);
if (ret != bufsize) {
dev_err(&client->dev, "failed to read values: %d\n", ret);
return ret < 0 ? ret : -EIO;
}
return 0;
}
/* sysfs attributes */
static struct shtc1_data *shtc1_update_client(struct device *dev)
{
struct shtc1_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
unsigned char buf[SHTC1_RESPONSE_LENGTH];
int val;
int ret = 0;
mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + HZ / 10) || !data->valid) {
ret = shtc1_update_values(client, data, buf, sizeof(buf));
if (ret)
goto out;
/*
* From datasheet:
* T = -45 + 175 * ST / 2^16
* RH = 100 * SRH / 2^16
*
* Adapted for integer fixed point (3 digit) arithmetic.
*/
val = be16_to_cpup((__be16 *)buf);
data->temperature = ((21875 * val) >> 13) - 45000;
val = be16_to_cpup((__be16 *)(buf + 3));
data->humidity = ((12500 * val) >> 13);
data->last_updated = jiffies;
data->valid = true;
}
out:
mutex_unlock(&data->update_lock);
return ret == 0 ? data : ERR_PTR(ret);
}
static ssize_t temp1_input_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct shtc1_data *data = shtc1_update_client(dev);
if (IS_ERR(data))
return PTR_ERR(data);
return sprintf(buf, "%d\n", data->temperature);
}
static ssize_t humidity1_input_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct shtc1_data *data = shtc1_update_client(dev);
if (IS_ERR(data))
return PTR_ERR(data);
return sprintf(buf, "%d\n", data->humidity);
}
static DEVICE_ATTR_RO(temp1_input);
static DEVICE_ATTR_RO(humidity1_input);
static struct attribute *shtc1_attrs[] = {
&dev_attr_temp1_input.attr,
&dev_attr_humidity1_input.attr,
NULL
};
ATTRIBUTE_GROUPS(shtc1);
static void shtc1_select_command(struct shtc1_data *data)
{
if (data->setup.high_precision) {
data->command = data->setup.blocking_io ?
shtc1_cmd_measure_blocking_hpm :
shtc1_cmd_measure_nonblocking_hpm;
data->nonblocking_wait_time = SHTC1_NONBLOCKING_WAIT_TIME_HPM;
} else {
data->command = data->setup.blocking_io ?
shtc1_cmd_measure_blocking_lpm :
shtc1_cmd_measure_nonblocking_lpm;
data->nonblocking_wait_time = SHTC1_NONBLOCKING_WAIT_TIME_LPM;
}
}
static int shtc1_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int ret;
char id_reg[2];
struct shtc1_data *data;
struct device *hwmon_dev;
struct i2c_adapter *adap = client->adapter;
struct device *dev = &client->dev;
if (!i2c_check_functionality(adap, I2C_FUNC_I2C)) {
dev_err(dev, "plain i2c transactions not supported\n");
return -ENODEV;
}
ret = i2c_master_send(client, shtc1_cmd_read_id_reg, SHTC1_CMD_LENGTH);
if (ret != SHTC1_CMD_LENGTH) {
dev_err(dev, "could not send read_id_reg command: %d\n", ret);
return ret < 0 ? ret : -ENODEV;
}
ret = i2c_master_recv(client, id_reg, sizeof(id_reg));
if (ret != sizeof(id_reg)) {
dev_err(dev, "could not read ID register: %d\n", ret);
return -ENODEV;
}
if ((id_reg[1] & SHTC1_ID_REG_MASK) != SHTC1_ID) {
dev_err(dev, "ID register doesn't match\n");
return -ENODEV;
}
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->setup.blocking_io = false;
data->setup.high_precision = true;
data->client = client;
if (client->dev.platform_data)
data->setup = *(struct shtc1_platform_data *)dev->platform_data;
shtc1_select_command(data);
mutex_init(&data->update_lock);
hwmon_dev = devm_hwmon_device_register_with_groups(dev,
client->name,
data,
shtc1_groups);
if (IS_ERR(hwmon_dev))
dev_dbg(dev, "unable to register hwmon device\n");
return PTR_ERR_OR_ZERO(hwmon_dev);
}
/* device ID table */
static const struct i2c_device_id shtc1_id[] = {
{ "shtc1", 0 },
{ "shtw1", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, shtc1_id);
static struct i2c_driver shtc1_i2c_driver = {
.driver.name = "shtc1",
.probe = shtc1_probe,
.id_table = shtc1_id,
};
module_i2c_driver(shtc1_i2c_driver);
MODULE_AUTHOR("Johannes Winkelmann <johannes.winkelmann@sensirion.com>");
MODULE_DESCRIPTION("Sensirion SHTC1 humidity and temperature sensor driver");
MODULE_LICENSE("GPL");

View File

@ -27,17 +27,8 @@
struct vexpress_hwmon_data {
struct device *hwmon_dev;
struct regmap *reg;
const char *name;
};
static ssize_t vexpress_hwmon_name_show(struct device *dev,
struct device_attribute *dev_attr, char *buffer)
{
struct vexpress_hwmon_data *data = dev_get_drvdata(dev);
return sprintf(buffer, "%s\n", data->name);
}
static ssize_t vexpress_hwmon_label_show(struct device *dev,
struct device_attribute *dev_attr, char *buffer)
{
@ -95,16 +86,6 @@ static umode_t vexpress_hwmon_attr_is_visible(struct kobject *kobj,
return attr->mode;
}
static DEVICE_ATTR(name, S_IRUGO, vexpress_hwmon_name_show, NULL);
#define VEXPRESS_HWMON_ATTRS(_name, _label_attr, _input_attr) \
struct attribute *vexpress_hwmon_attrs_##_name[] = { \
&dev_attr_name.attr, \
&dev_attr_##_label_attr.attr, \
&sensor_dev_attr_##_input_attr.dev_attr.attr, \
NULL \
}
struct vexpress_hwmon_type {
const char *name;
const struct attribute_group **attr_groups;
@ -114,7 +95,11 @@ struct vexpress_hwmon_type {
static DEVICE_ATTR(in1_label, S_IRUGO, vexpress_hwmon_label_show, NULL);
static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, vexpress_hwmon_u32_show,
NULL, 1000);
static VEXPRESS_HWMON_ATTRS(volt, in1_label, in1_input);
static struct attribute *vexpress_hwmon_attrs_volt[] = {
&dev_attr_in1_label.attr,
&sensor_dev_attr_in1_input.dev_attr.attr,
NULL
};
static struct attribute_group vexpress_hwmon_group_volt = {
.is_visible = vexpress_hwmon_attr_is_visible,
.attrs = vexpress_hwmon_attrs_volt,
@ -131,7 +116,11 @@ static struct vexpress_hwmon_type vexpress_hwmon_volt = {
static DEVICE_ATTR(curr1_label, S_IRUGO, vexpress_hwmon_label_show, NULL);
static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, vexpress_hwmon_u32_show,
NULL, 1000);
static VEXPRESS_HWMON_ATTRS(amp, curr1_label, curr1_input);
static struct attribute *vexpress_hwmon_attrs_amp[] = {
&dev_attr_curr1_label.attr,
&sensor_dev_attr_curr1_input.dev_attr.attr,
NULL
};
static struct attribute_group vexpress_hwmon_group_amp = {
.is_visible = vexpress_hwmon_attr_is_visible,
.attrs = vexpress_hwmon_attrs_amp,
@ -147,7 +136,11 @@ static struct vexpress_hwmon_type vexpress_hwmon_amp = {
static DEVICE_ATTR(temp1_label, S_IRUGO, vexpress_hwmon_label_show, NULL);
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, vexpress_hwmon_u32_show,
NULL, 1000);
static VEXPRESS_HWMON_ATTRS(temp, temp1_label, temp1_input);
static struct attribute *vexpress_hwmon_attrs_temp[] = {
&dev_attr_temp1_label.attr,
&sensor_dev_attr_temp1_input.dev_attr.attr,
NULL
};
static struct attribute_group vexpress_hwmon_group_temp = {
.is_visible = vexpress_hwmon_attr_is_visible,
.attrs = vexpress_hwmon_attrs_temp,
@ -163,7 +156,11 @@ static struct vexpress_hwmon_type vexpress_hwmon_temp = {
static DEVICE_ATTR(power1_label, S_IRUGO, vexpress_hwmon_label_show, NULL);
static SENSOR_DEVICE_ATTR(power1_input, S_IRUGO, vexpress_hwmon_u32_show,
NULL, 1);
static VEXPRESS_HWMON_ATTRS(power, power1_label, power1_input);
static struct attribute *vexpress_hwmon_attrs_power[] = {
&dev_attr_power1_label.attr,
&sensor_dev_attr_power1_input.dev_attr.attr,
NULL
};
static struct attribute_group vexpress_hwmon_group_power = {
.is_visible = vexpress_hwmon_attr_is_visible,
.attrs = vexpress_hwmon_attrs_power,
@ -179,7 +176,11 @@ static struct vexpress_hwmon_type vexpress_hwmon_power = {
static DEVICE_ATTR(energy1_label, S_IRUGO, vexpress_hwmon_label_show, NULL);
static SENSOR_DEVICE_ATTR(energy1_input, S_IRUGO, vexpress_hwmon_u64_show,
NULL, 1);
static VEXPRESS_HWMON_ATTRS(energy, energy1_label, energy1_input);
static struct attribute *vexpress_hwmon_attrs_energy[] = {
&dev_attr_energy1_label.attr,
&sensor_dev_attr_energy1_input.dev_attr.attr,
NULL
};
static struct attribute_group vexpress_hwmon_group_energy = {
.is_visible = vexpress_hwmon_attr_is_visible,
.attrs = vexpress_hwmon_attrs_energy,
@ -218,7 +219,6 @@ MODULE_DEVICE_TABLE(of, vexpress_hwmon_of_match);
static int vexpress_hwmon_probe(struct platform_device *pdev)
{
int err;
const struct of_device_id *match;
struct vexpress_hwmon_data *data;
const struct vexpress_hwmon_type *type;
@ -232,45 +232,19 @@ static int vexpress_hwmon_probe(struct platform_device *pdev)
if (!match)
return -ENODEV;
type = match->data;
data->name = type->name;
data->reg = devm_regmap_init_vexpress_config(&pdev->dev);
if (IS_ERR(data->reg))
return PTR_ERR(data->reg);
err = sysfs_create_groups(&pdev->dev.kobj, type->attr_groups);
if (err)
goto error;
data->hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev,
type->name, data, type->attr_groups);
data->hwmon_dev = hwmon_device_register(&pdev->dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
goto error;
}
return 0;
error:
sysfs_remove_group(&pdev->dev.kobj, match->data);
return err;
}
static int vexpress_hwmon_remove(struct platform_device *pdev)
{
struct vexpress_hwmon_data *data = platform_get_drvdata(pdev);
const struct of_device_id *match;
hwmon_device_unregister(data->hwmon_dev);
match = of_match_device(vexpress_hwmon_of_match, &pdev->dev);
sysfs_remove_group(&pdev->dev.kobj, match->data);
return 0;
return PTR_ERR_OR_ZERO(data->hwmon_dev);
}
static struct platform_driver vexpress_hwmon_driver = {
.probe = vexpress_hwmon_probe,
.remove = vexpress_hwmon_remove,
.driver = {
.name = DRVNAME,
.owner = THIS_MODULE,

View File

@ -0,0 +1,23 @@
/*
* Copyright (C) 2014 Sensirion AG, Switzerland
* Author: Johannes Winkelmann <johannes.winkelmann@sensirion.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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.
*
*/
#ifndef __SHTC1_H_
#define __SHTC1_H_
struct shtc1_platform_data {
bool blocking_io;
bool high_precision;
};
#endif /* __SHTC1_H_ */