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Commit 10f2ed31 authored by Matthew Garrett's avatar Matthew Garrett Committed by Jean Delvare
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hwmon: (lm63) Add basic support for LM64 



The LM64 appears to be an LM63 with added GPIO lines. Add support for the
hwmon functionality - GPIO can be added at some later stage if someone
has a need for them.

Signed-off-by: default avatarMatthew Garrett <mjg@redhat.com>
Signed-off-by: default avatarJean Delvare <khali@linux-fr.org>
parent 70dd6bea

Documentation/hwmon/lm63

+7 −0
Original line number Diff line number Diff line
@@ -7,6 +7,11 @@ Supported chips: 
    Addresses scanned: I2C 0x4c

    Datasheet: Publicly available at the National Semiconductor website

               http://www.national.com/pf/LM/LM63.html

  * National Semiconductor LM64

    Prefix: 'lm64'

    Addresses scanned: I2C 0x18 and 0x4e

    Datasheet: Publicly available at the National Semiconductor website

               http://www.national.com/pf/LM/LM64.html



Author: Jean Delvare <khali@linux-fr.org>
@@ -55,3 +60,5 @@ The lm63 driver will not update its values more frequently than every 
second; reading them more often will do no harm, but will return 'old'

values.



The LM64 is effectively an LM63 with GPIO lines. The driver does not

support these GPIO lines at present.

drivers/hwmon/Kconfig

+6 −5
Original line number Diff line number Diff line
@@ -447,13 +447,14 @@ config SENSORS_IT87 
	  will be called it87.



config SENSORS_LM63

	tristate "National Semiconductor LM63"

	tristate "National Semiconductor LM63 and LM64"

	depends on I2C

	help

	  If you say yes here you get support for the National Semiconductor

	  LM63 remote diode digital temperature sensor with integrated fan

	  control.  Such chips are found on the Tyan S4882 (Thunder K8QS Pro)

	  motherboard, among others.

	  If you say yes here you get support for the National

	  Semiconductor LM63 and LM64 remote diode digital temperature

	  sensors with integrated fan control.  Such chips are found

	  on the Tyan S4882 (Thunder K8QS Pro) motherboard, among

	  others.



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

	  will be called lm63.

drivers/hwmon/lm63.c

+12 −4
Original line number Diff line number Diff line
@@ -53,7 +53,7 @@ 
 * Address is fully defined internally and cannot be changed.

 */



static const unsigned short normal_i2c[] = { 0x4c, I2C_CLIENT_END };

static const unsigned short normal_i2c[] = { 0x18, 0x4c, 0x4e, I2C_CLIENT_END };



/*

 * The LM63 registers
@@ -131,12 +131,15 @@ static struct lm63_data *lm63_update_device(struct device *dev); 
static int lm63_detect(struct i2c_client *client, struct i2c_board_info *info);

static void lm63_init_client(struct i2c_client *client);



enum chips { lm63, lm64 };



/*

 * Driver data (common to all clients)

 */



static const struct i2c_device_id lm63_id[] = {

	{ "lm63", 0 },

	{ "lm63", lm63 },

	{ "lm64", lm64 },

	{ }

};

MODULE_DEVICE_TABLE(i2c, lm63_id);
@@ -422,6 +425,7 @@ static int lm63_detect(struct i2c_client *new_client, 
	struct i2c_adapter *adapter = new_client->adapter;

	u8 man_id, chip_id, reg_config1, reg_config2;

	u8 reg_alert_status, reg_alert_mask;

	int address = new_client->addr;



	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))

		return -ENODEV;
@@ -439,7 +443,6 @@ static int lm63_detect(struct i2c_client *new_client, 
			 LM63_REG_ALERT_MASK);



	if (man_id != 0x01 /* National Semiconductor */

	 || chip_id != 0x41 /* LM63 */

	 || (reg_config1 & 0x18) != 0x00

	 || (reg_config2 & 0xF8) != 0x00

	 || (reg_alert_status & 0x20) != 0x00
@@ -450,7 +453,12 @@ static int lm63_detect(struct i2c_client *new_client, 
		return -ENODEV;

	}



	if (chip_id == 0x41 && address == 0x4c)

		strlcpy(info->type, "lm63", I2C_NAME_SIZE);

	else if (chip_id == 0x51 && (address == 0x18 || address == 0x4e))

		strlcpy(info->type, "lm64", I2C_NAME_SIZE);

	else

		return -ENODEV;



	return 0;

}