Commit 03e9bd8d authored by Guenter Roeck's avatar Guenter Roeck
Browse files

hwmon: (pmbus) Add client driver for LM25066, LM5064, and LM5066 



PMBus client driver supporting National Semiconductor LM25066, LM5064, and LM5066.

Signed-off-by: default avatarGuenter Roeck <guenter.roeck@ericsson.com>
Reviewed-by: default avatarRobert Coulson <robert.coulson@ericsson.com>
parent 98591dbe

Documentation/hwmon/lm25066

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Kernel driver max8688

=====================



Supported chips:

  * National Semiconductor LM25066

    Prefix: 'lm25066'

    Addresses scanned: -

    Datasheets:

	http://www.national.com/pf/LM/LM25066.html

	http://www.national.com/pf/LM/LM25066A.html

  * National Semiconductor LM5064

    Prefix: 'lm5064'

    Addresses scanned: -

    Datasheet:

	http://www.national.com/pf/LM/LM5064.html

  * National Semiconductor LM5066

    Prefix: 'lm5066'

    Addresses scanned: -

    Datasheet:

	http://www.national.com/pf/LM/LM5066.html



Author: Guenter Roeck <guenter.roeck@ericsson.com>





Description

-----------



This driver supports hardware montoring for National Semiconductor LM25066,

LM5064, and LM5064 Power Management, Monitoring, Control, and Protection ICs.



The driver is a client driver to the core PMBus driver. Please see

Documentation/hwmon/pmbus for details on PMBus client drivers.





Usage Notes

-----------



This driver does not auto-detect devices. You will have to instantiate the

devices explicitly. Please see Documentation/i2c/instantiating-devices for

details.





Platform data support

---------------------



The driver supports standard PMBus driver platform data.





Sysfs entries

-------------



The following attributes are supported. Limits are read-write; all other

attributes are read-only.



in1_label		"vin"

in1_input		Measured input voltage.

in1_average		Average measured input voltage.

in1_min			Minimum input voltage.

in1_max			Maximum input voltage.

in1_min_alarm		Input voltage low alarm.

in1_max_alarm		Input voltage high alarm.



in2_label		"vout1"

in2_input		Measured output voltage.

in2_average		Average measured output voltage.

in2_min			Minimum output voltage.

in2_min_alarm		Output voltage low alarm.



in3_label		"vout2"

in3_input		Measured voltage on vaux pin



curr1_label		"iin"

curr1_input		Measured input current.

curr1_average		Average measured input current.

curr1_max		Maximum input current.

curr1_max_alarm		Input current high alarm.



power1_label		"pin"

power1_input		Measured input power.

power1_average		Average measured input power.

power1_max		Maximum input power limit.

power1_alarm		Input power alarm

power1_input_highest	Historical maximum power.

power1_reset_history	Write any value to reset maximum power history.



temp1_input		Measured temperature.

temp1_max		Maximum temperature.

temp1_crit		Critical high temperature.

temp1_max_alarm		Chip temperature high alarm.

temp1_crit_alarm	Chip temperature critical high alarm.

drivers/hwmon/pmbus/Kconfig

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@@ -35,6 +35,16 @@ config SENSORS_ADM1275 
	  This driver can also be built as a module. If so, the module will

	  be called adm1275.



config SENSORS_LM25066

	tristate "National Semiconductor LM25066 and compatibles"

	default n

	help

	  If you say yes here you get hardware monitoring support for National

	  Semiconductor LM25066, LM5064, and LM5066.



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

	  be called lm25066.



config SENSORS_MAX16064

	tristate "Maxim MAX16064"

	default n

drivers/hwmon/pmbus/Makefile

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Original line number Diff line number Diff line
@@ -5,6 +5,7 @@ 
obj-$(CONFIG_PMBUS)		+= pmbus_core.o

obj-$(CONFIG_SENSORS_PMBUS)	+= pmbus.o

obj-$(CONFIG_SENSORS_ADM1275)	+= adm1275.o

obj-$(CONFIG_SENSORS_LM25066)	+= lm25066.o

obj-$(CONFIG_SENSORS_MAX16064)	+= max16064.o

obj-$(CONFIG_SENSORS_MAX34440)	+= max34440.o

obj-$(CONFIG_SENSORS_MAX8688)	+= max8688.o

drivers/hwmon/pmbus/lm25066.c

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/*

 * Hardware monitoring driver for LM25066 / LM5064 / LM5066

 *

 * Copyright (c) 2011 Ericsson AB.

 *

 * 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.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 */



#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/err.h>

#include <linux/slab.h>

#include <linux/i2c.h>

#include "pmbus.h"



enum chips { lm25066, lm5064, lm5066 };



#define LM25066_READ_VAUX		0xd0

#define LM25066_MFR_READ_IIN		0xd1

#define LM25066_MFR_READ_PIN		0xd2

#define LM25066_MFR_IIN_OC_WARN_LIMIT	0xd3

#define LM25066_MFR_PIN_OP_WARN_LIMIT	0xd4

#define LM25066_READ_PIN_PEAK		0xd5

#define LM25066_CLEAR_PIN_PEAK		0xd6

#define LM25066_DEVICE_SETUP		0xd9

#define LM25066_READ_AVG_VIN		0xdc

#define LM25066_READ_AVG_VOUT		0xdd

#define LM25066_READ_AVG_IIN		0xde

#define LM25066_READ_AVG_PIN		0xdf



#define LM25066_DEV_SETUP_CL		(1 << 4)	/* Current limit */



struct lm25066_data {

	int id;

	struct pmbus_driver_info info;

};



#define to_lm25066_data(x)  container_of(x, struct lm25066_data, info)



static int lm25066_read_word_data(struct i2c_client *client, int page, int reg)

{

	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);

	const struct lm25066_data *data = to_lm25066_data(info);

	int ret;



	if (page > 1)

		return -EINVAL;



	/* Map READ_VAUX into READ_VOUT register on page 1 */

	if (page == 1) {

		switch (reg) {

		case PMBUS_READ_VOUT:

			ret = pmbus_read_word_data(client, 0,

						   LM25066_READ_VAUX);

			if (ret < 0)

				break;

			/* Adjust returned value to match VOUT coefficients */

			switch (data->id) {

			case lm25066:

				/* VOUT: 4.54 mV VAUX: 283.2 uV LSB */

				ret = DIV_ROUND_CLOSEST(ret * 2832, 45400);

				break;

			case lm5064:

				/* VOUT: 4.53 mV VAUX: 700 uV LSB */

				ret = DIV_ROUND_CLOSEST(ret * 70, 453);

				break;

			case lm5066:

				/* VOUT: 2.18 mV VAUX: 725 uV LSB */

				ret = DIV_ROUND_CLOSEST(ret * 725, 2180);

				break;

			}

			break;

		default:

			/* No other valid registers on page 1 */

			ret = -EINVAL;

			break;

		}

		goto done;

	}



	switch (reg) {

	case PMBUS_READ_IIN:

		ret = pmbus_read_word_data(client, 0, LM25066_MFR_READ_IIN);

		break;

	case PMBUS_READ_PIN:

		ret = pmbus_read_word_data(client, 0, LM25066_MFR_READ_PIN);

		break;

	case PMBUS_IIN_OC_WARN_LIMIT:

		ret = pmbus_read_word_data(client, 0,

					   LM25066_MFR_IIN_OC_WARN_LIMIT);

		break;

	case PMBUS_PIN_OP_WARN_LIMIT:

		ret = pmbus_read_word_data(client, 0,

					   LM25066_MFR_PIN_OP_WARN_LIMIT);

		break;

	case PMBUS_VIRT_READ_VIN_AVG:

		ret = pmbus_read_word_data(client, 0, LM25066_READ_AVG_VIN);

		break;

	case PMBUS_VIRT_READ_VOUT_AVG:

		ret = pmbus_read_word_data(client, 0, LM25066_READ_AVG_VOUT);

		break;

	case PMBUS_VIRT_READ_IIN_AVG:

		ret = pmbus_read_word_data(client, 0, LM25066_READ_AVG_IIN);

		break;

	case PMBUS_VIRT_READ_PIN_AVG:

		ret = pmbus_read_word_data(client, 0, LM25066_READ_AVG_PIN);

		break;

	case PMBUS_VIRT_READ_PIN_MAX:

		ret = pmbus_read_word_data(client, 0, LM25066_READ_PIN_PEAK);

		break;

	case PMBUS_VIRT_RESET_PIN_HISTORY:

		ret = 0;

		break;

	default:

		ret = -ENODATA;

		break;

	}

done:

	return ret;

}



static int lm25066_write_word_data(struct i2c_client *client, int page, int reg,

				   u16 word)

{

	int ret;



	if (page > 1)

		return -EINVAL;



	switch (reg) {

	case PMBUS_IIN_OC_WARN_LIMIT:

		ret = pmbus_write_word_data(client, 0,

					    LM25066_MFR_IIN_OC_WARN_LIMIT,

					    word);

		break;

	case PMBUS_PIN_OP_WARN_LIMIT:

		ret = pmbus_write_word_data(client, 0,

					    LM25066_MFR_PIN_OP_WARN_LIMIT,

					    word);

		break;

	case PMBUS_VIRT_RESET_PIN_HISTORY:

		ret = pmbus_write_byte(client, 0, LM25066_CLEAR_PIN_PEAK);

		break;

	default:

		ret = -ENODATA;

		break;

	}

	return ret;

}



static int lm25066_probe(struct i2c_client *client,

			  const struct i2c_device_id *id)

{

	int config;

	int ret;

	struct lm25066_data *data;

	struct pmbus_driver_info *info;



	if (!i2c_check_functionality(client->adapter,

				     I2C_FUNC_SMBUS_READ_BYTE_DATA))

		return -ENODEV;



	data = kzalloc(sizeof(struct lm25066_data), GFP_KERNEL);

	if (!data)

		return -ENOMEM;



	config = i2c_smbus_read_byte_data(client, LM25066_DEVICE_SETUP);

	if (config < 0) {

		ret = config;

		goto err_mem;

	}



	data->id = id->driver_data;

	info = &data->info;



	info->pages = 2;

	info->format[PSC_VOLTAGE_IN] = direct;

	info->format[PSC_VOLTAGE_OUT] = direct;

	info->format[PSC_CURRENT_IN] = direct;

	info->format[PSC_TEMPERATURE] = direct;

	info->format[PSC_POWER] = direct;



	info->m[PSC_TEMPERATURE] = 16;

	info->b[PSC_TEMPERATURE] = 0;

	info->R[PSC_TEMPERATURE] = 0;



	info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT

	  | PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_PIN | PMBUS_HAVE_IIN

	  | PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;

	info->func[1] = PMBUS_HAVE_VOUT;



	info->read_word_data = lm25066_read_word_data;

	info->write_word_data = lm25066_write_word_data;



	switch (id->driver_data) {

	case lm25066:

		info->m[PSC_VOLTAGE_IN] = 22070;

		info->b[PSC_VOLTAGE_IN] = 0;

		info->R[PSC_VOLTAGE_IN] = -2;

		info->m[PSC_VOLTAGE_OUT] = 22070;

		info->b[PSC_VOLTAGE_OUT] = 0;

		info->R[PSC_VOLTAGE_OUT] = -2;



		if (config & LM25066_DEV_SETUP_CL) {

			info->m[PSC_CURRENT_IN] = 6852;

			info->b[PSC_CURRENT_IN] = 0;

			info->R[PSC_CURRENT_IN] = -2;

			info->m[PSC_POWER] = 369;

			info->b[PSC_POWER] = 0;

			info->R[PSC_POWER] = -2;

		} else {

			info->m[PSC_CURRENT_IN] = 13661;

			info->b[PSC_CURRENT_IN] = 0;

			info->R[PSC_CURRENT_IN] = -2;

			info->m[PSC_POWER] = 736;

			info->b[PSC_POWER] = 0;

			info->R[PSC_POWER] = -2;

		}

		break;

	case lm5064:

		info->m[PSC_VOLTAGE_IN] = 22075;

		info->b[PSC_VOLTAGE_IN] = 0;

		info->R[PSC_VOLTAGE_IN] = -2;

		info->m[PSC_VOLTAGE_OUT] = 22075;

		info->b[PSC_VOLTAGE_OUT] = 0;

		info->R[PSC_VOLTAGE_OUT] = -2;



		if (config & LM25066_DEV_SETUP_CL) {

			info->m[PSC_CURRENT_IN] = 6713;

			info->b[PSC_CURRENT_IN] = 0;

			info->R[PSC_CURRENT_IN] = -2;

			info->m[PSC_POWER] = 3619;

			info->b[PSC_POWER] = 0;

			info->R[PSC_POWER] = -3;

		} else {

			info->m[PSC_CURRENT_IN] = 13426;

			info->b[PSC_CURRENT_IN] = 0;

			info->R[PSC_CURRENT_IN] = -2;

			info->m[PSC_POWER] = 7238;

			info->b[PSC_POWER] = 0;

			info->R[PSC_POWER] = -3;

		}

		break;

	case lm5066:

		info->m[PSC_VOLTAGE_IN] = 4587;

		info->b[PSC_VOLTAGE_IN] = 0;

		info->R[PSC_VOLTAGE_IN] = -2;

		info->m[PSC_VOLTAGE_OUT] = 4587;

		info->b[PSC_VOLTAGE_OUT] = 0;

		info->R[PSC_VOLTAGE_OUT] = -2;



		if (config & LM25066_DEV_SETUP_CL) {

			info->m[PSC_CURRENT_IN] = 10753;

			info->b[PSC_CURRENT_IN] = 0;

			info->R[PSC_CURRENT_IN] = -2;

			info->m[PSC_POWER] = 1204;

			info->b[PSC_POWER] = 0;

			info->R[PSC_POWER] = -3;

		} else {

			info->m[PSC_CURRENT_IN] = 5405;

			info->b[PSC_CURRENT_IN] = 0;

			info->R[PSC_CURRENT_IN] = -2;

			info->m[PSC_POWER] = 605;

			info->b[PSC_POWER] = 0;

			info->R[PSC_POWER] = -3;

		}

		break;

	default:

		ret = -ENODEV;

		goto err_mem;

	}



	ret = pmbus_do_probe(client, id, info);

	if (ret)

		goto err_mem;

	return 0;



err_mem:

	kfree(data);

	return ret;

}



static int lm25066_remove(struct i2c_client *client)

{

	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);

	const struct lm25066_data *data = to_lm25066_data(info);

	int ret;



	ret = pmbus_do_remove(client);

	kfree(data);

	return ret;

}



static const struct i2c_device_id lm25066_id[] = {

	{"lm25066", lm25066},

	{"lm5064", lm5064},

	{"lm5066", lm5066},

	{ }

};



MODULE_DEVICE_TABLE(i2c, lm25066_id);



/* This is the driver that will be inserted */

static struct i2c_driver lm25066_driver = {

	.driver = {

		   .name = "lm25066",

		   },

	.probe = lm25066_probe,

	.remove = lm25066_remove,

	.id_table = lm25066_id,

};



static int __init lm25066_init(void)

{

	return i2c_add_driver(&lm25066_driver);

}



static void __exit lm25066_exit(void)

{

	i2c_del_driver(&lm25066_driver);

}



MODULE_AUTHOR("Guenter Roeck");

MODULE_DESCRIPTION("PMBus driver for LM25066/LM5064/LM5066");

MODULE_LICENSE("GPL");

module_init(lm25066_init);

module_exit(lm25066_exit);

drivers/hwmon/pmbus/pmbus.h

+1 −0
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@@ -340,6 +340,7 @@ int pmbus_set_page(struct i2c_client *client, u8 page); 
int pmbus_read_word_data(struct i2c_client *client, u8 page, u8 reg);

int pmbus_write_word_data(struct i2c_client *client, u8 page, u8 reg, u16 word);

int pmbus_read_byte_data(struct i2c_client *client, int page, u8 reg);

int pmbus_write_byte(struct i2c_client *client, int page, u8 value);

void pmbus_clear_faults(struct i2c_client *client);

bool pmbus_check_byte_register(struct i2c_client *client, int page, int reg);

bool pmbus_check_word_register(struct i2c_client *client, int page, int reg);

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