drivers/hwmon/pmbus/lm25066.c - android_kernel_htc_msm8960 - Gitiles

 /*
  * 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 -ENXIO;

 	/* 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 = -ENXIO;
 			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 -ENXIO;

 	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_write_byte(struct i2c_client *client, int page, u8 value)
 {
 	if (page > 1)
 		return -ENXIO;

 	if (page <= 0)
 		return pmbus_write_byte(client, page, value);

 	return 0;
 }

 static int lm25066_probe(struct i2c_client *client,
 			  const struct i2c_device_id *id)
 {
 	int config;
 	struct lm25066_data *data;
 	struct pmbus_driver_info *info;

 	if (!i2c_check_functionality(client->adapter,
 				     I2C_FUNC_SMBUS_READ_BYTE_DATA))
 		return -ENODEV;

 	data = devm_kzalloc(&client->dev, sizeof(struct lm25066_data),
 			    GFP_KERNEL);
 	if (!data)
 		return -ENOMEM;

 	config = i2c_smbus_read_byte_data(client, LM25066_DEVICE_SETUP);
 	if (config < 0)
 		return config;

 	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;
 	info->write_byte = lm25066_write_byte;

 	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:
 		return -ENODEV;
 	}

 	return pmbus_do_probe(client, id, info);
 }

 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 = pmbus_do_remove,
 	.id_table = lm25066_id,
 };

 module_i2c_driver(lm25066_driver);

 MODULE_AUTHOR("Guenter Roeck");
 MODULE_DESCRIPTION("PMBus driver for LM25066/LM5064/LM5066");
 MODULE_LICENSE("GPL");
	/*
	* 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 -ENXIO;

	/* 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 = -ENXIO;
	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 -ENXIO;

	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_write_byte(struct i2c_client *client, int page, u8 value)
	{
	if (page > 1)
	return -ENXIO;

	if (page <= 0)
	return pmbus_write_byte(client, page, value);

	return 0;
	}

	static int lm25066_probe(struct i2c_client *client,
	const struct i2c_device_id *id)
	{
	int config;
	struct lm25066_data *data;
	struct pmbus_driver_info *info;

	if (!i2c_check_functionality(client->adapter,
	I2C_FUNC_SMBUS_READ_BYTE_DATA))
	return -ENODEV;

	data = devm_kzalloc(&client->dev, sizeof(struct lm25066_data),
	GFP_KERNEL);
	if (!data)
	return -ENOMEM;

	config = i2c_smbus_read_byte_data(client, LM25066_DEVICE_SETUP);
	if (config < 0)
	return config;

	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;
	info->write_byte = lm25066_write_byte;

	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:
	return -ENODEV;
	}

	return pmbus_do_probe(client, id, info);
	}

	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 = pmbus_do_remove,
	.id_table = lm25066_id,
	};

	module_i2c_driver(lm25066_driver);

	MODULE_AUTHOR("Guenter Roeck");
	MODULE_DESCRIPTION("PMBus driver for LM25066/LM5064/LM5066");
	MODULE_LICENSE("GPL");