diff options
Diffstat (limited to '')
| -rw-r--r-- | Documentation/hwmon/lm95245 | 14 | ||||
| -rw-r--r-- | drivers/hwmon/Kconfig | 5 | ||||
| -rw-r--r-- | drivers/hwmon/lm95245.c | 41 |
3 files changed, 39 insertions, 21 deletions
diff --git a/Documentation/hwmon/lm95245 b/Documentation/hwmon/lm95245 index 77eaf2812d25..d755901f58c4 100644 --- a/Documentation/hwmon/lm95245 +++ b/Documentation/hwmon/lm95245 @@ -2,10 +2,14 @@ Kernel driver lm95245 ================== Supported chips: - * National Semiconductor LM95245 + * TI LM95235 + Addresses scanned: I2C 0x18, 0x29, 0x4c + Datasheet: Publicly available at the TI website + http://www.ti.com/lit/ds/symlink/lm95235.pdf + * TI / National Semiconductor LM95245 Addresses scanned: I2C 0x18, 0x19, 0x29, 0x4c, 0x4d - Datasheet: Publicly available at the National Semiconductor website - http://www.national.com/mpf/LM/LM95245.html + Datasheet: Publicly available at the TI website + http://www.ti.com/lit/ds/symlink/lm95245.pdf Author: Alexander Stein <alexander.stein@systec-electronic.com> @@ -13,10 +17,10 @@ Author: Alexander Stein <alexander.stein@systec-electronic.com> Description ----------- -The LM95245 is an 11-bit digital temperature sensor with a 2-wire System +LM95235 and LM95245 are 11-bit digital temperature sensors with a 2-wire System Management Bus (SMBus) interface and TruTherm technology that can monitor the temperature of a remote diode as well as its own temperature. -The LM95245 can be used to very accurately monitor the temperature of +The chips can be used to very accurately monitor the temperature of external devices such as microprocessors. All temperature values are given in millidegrees Celsius. Local temperature diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index fcca19b53bd2..085f5a853618 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -1048,10 +1048,11 @@ config SENSORS_LM95241 will be called lm95241. config SENSORS_LM95245 - tristate "National Semiconductor LM95245 sensor chip" + tristate "National Semiconductor LM95245 and compatibles" depends on I2C help - If you say yes here you get support for LM95245 sensor chip. + If you say yes here you get support for LM95235 and LM95245 + temperature sensor chips. This driver can also be built as a module. If so, the module will be called lm95245. diff --git a/drivers/hwmon/lm95245.c b/drivers/hwmon/lm95245.c index 0ae0dfdafdff..e7aef4561c83 100644 --- a/drivers/hwmon/lm95245.c +++ b/drivers/hwmon/lm95245.c @@ -1,10 +1,8 @@ /* * Copyright (C) 2011 Alexander Stein <alexander.stein@systec-electronic.com> * - * The LM95245 is a sensor chip made by National Semiconductors. + * The LM95245 is a sensor chip made by TI / National Semiconductor. * It reports up to two temperatures (its own plus an external one). - * Complete datasheet can be obtained from National's website at: - * http://www.national.com/ds.cgi/LM/LM95245.pdf * * This driver is based on lm95241.c * @@ -34,8 +32,6 @@ #include <linux/mutex.h> #include <linux/sysfs.h> -#define DEVNAME "lm95245" - static const unsigned short normal_i2c[] = { 0x18, 0x19, 0x29, 0x4c, 0x4d, I2C_CLIENT_END }; @@ -98,7 +94,8 @@ static const unsigned short normal_i2c[] = { #define STATUS1_LOC 0x01 #define MANUFACTURER_ID 0x01 -#define DEFAULT_REVISION 0xB3 +#define LM95235_REVISION 0xB1 +#define LM95245_REVISION 0xB3 static const u8 lm95245_reg_address[] = { LM95245_REG_R_LOCAL_TEMPH_S, @@ -427,17 +424,32 @@ static int lm95245_detect(struct i2c_client *new_client, struct i2c_board_info *info) { struct i2c_adapter *adapter = new_client->adapter; + int address = new_client->addr; + const char *name; + int rev, id; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) return -ENODEV; - if (i2c_smbus_read_byte_data(new_client, LM95245_REG_R_MAN_ID) - != MANUFACTURER_ID - || i2c_smbus_read_byte_data(new_client, LM95245_REG_R_CHIP_ID) - != DEFAULT_REVISION) + id = i2c_smbus_read_byte_data(new_client, LM95245_REG_R_MAN_ID); + if (id != MANUFACTURER_ID) return -ENODEV; - strlcpy(info->type, DEVNAME, I2C_NAME_SIZE); + rev = i2c_smbus_read_byte_data(new_client, LM95245_REG_R_CHIP_ID); + switch (rev) { + case LM95235_REVISION: + if (address != 0x18 && address != 0x29 && address != 0x4c) + return -ENODEV; + name = "lm95235"; + break; + case LM95245_REVISION: + name = "lm95245"; + break; + default: + return -ENODEV; + } + + strlcpy(info->type, name, I2C_NAME_SIZE); return 0; } @@ -484,7 +496,8 @@ static int lm95245_probe(struct i2c_client *client, /* Driver data (common to all clients) */ static const struct i2c_device_id lm95245_id[] = { - { DEVNAME, 0 }, + { "lm95235", 0 }, + { "lm95245", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, lm95245_id); @@ -492,7 +505,7 @@ MODULE_DEVICE_TABLE(i2c, lm95245_id); static struct i2c_driver lm95245_driver = { .class = I2C_CLASS_HWMON, .driver = { - .name = DEVNAME, + .name = "lm95245", }, .probe = lm95245_probe, .id_table = lm95245_id, @@ -503,5 +516,5 @@ static struct i2c_driver lm95245_driver = { module_i2c_driver(lm95245_driver); MODULE_AUTHOR("Alexander Stein <alexander.stein@systec-electronic.com>"); -MODULE_DESCRIPTION("LM95245 sensor driver"); +MODULE_DESCRIPTION("LM95235/LM95245 sensor driver"); MODULE_LICENSE("GPL"); |