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Commit 8c1d0419 authored by Guenter Roeck's avatar Guenter Roeck
Browse files

hwmon: (lm95241) Add support for LM95231 



LM95231 is fully compatible to LM95241; only necessary change is to add
chip detection.

Signed-off-by: default avatarGuenter Roeck <guenter.roeck@ericsson.com>
Acked-by: default avatarJean Delvare <khali@linux-fr.org>
parent fffd80cc

drivers/hwmon/Kconfig

+3 −2
Original line number Diff line number Diff line
@@ -694,10 +694,11 @@ config SENSORS_LTC4261 
	  be called ltc4261.



config SENSORS_LM95241

	tristate "National Semiconductor LM95241 sensor chip"

	tristate "National Semiconductor LM95241 and compatibles"

	depends on I2C

	help

	  If you say yes here you get support for LM95241 sensor chip.

	  If you say yes here you get support for LM95231 and LM95241 sensor

	  chips.



	  This driver can also be built as a module.  If so, the module

	  will be called lm95241.

drivers/hwmon/lm95241.c

+19 −12
Original line number Diff line number Diff line
@@ -74,8 +74,9 @@ static const unsigned short normal_i2c[] = { 
#define TT_OFF 0

#define TT_ON 1

#define TT_MASK 7

#define MANUFACTURER_ID 0x01

#define DEFAULT_REVISION 0xA4

#define NATSEMI_MAN_ID	0x01

#define LM95231_CHIP_ID	0xA1

#define LM95241_CHIP_ID	0xA4



static const u8 lm95241_reg_address[] = {

	LM95241_REG_R_LOCAL_TEMPH,
@@ -338,20 +339,25 @@ static int lm95241_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 mfg_id, chip_id;



	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))

		return -ENODEV;



	if ((i2c_smbus_read_byte_data(new_client, LM95241_REG_R_MAN_ID)

	     == MANUFACTURER_ID)

	    && (i2c_smbus_read_byte_data(new_client, LM95241_REG_R_CHIP_ID)

		== DEFAULT_REVISION)) {

		name = DEVNAME;

	} else {

		dev_dbg(&adapter->dev, "LM95241 detection failed at 0x%02x\n",

			address);

	mfg_id = i2c_smbus_read_byte_data(new_client, LM95241_REG_R_MAN_ID);

	if (mfg_id != NATSEMI_MAN_ID)

		return -ENODEV;



	chip_id = i2c_smbus_read_byte_data(new_client, LM95241_REG_R_CHIP_ID);

	switch (chip_id) {

	case LM95231_CHIP_ID:

		name = "lm95231";

		break;

	case LM95241_CHIP_ID:

		name = "lm95241";

		break;

	default:

		return -ENODEV;

	}
@@ -431,7 +437,8 @@ static int lm95241_remove(struct i2c_client *client) 


/* Driver data (common to all clients) */

static const struct i2c_device_id lm95241_id[] = {

	{ DEVNAME, 0 },

	{ "lm95231", 0 },

	{ "lm95241", 0 },

	{ }

};

MODULE_DEVICE_TABLE(i2c, lm95241_id);