[mirror_ubuntu-bionic-kernel.git] / drivers / hwmon / pmbus / adm1275.c

/*
 * Hardware monitoring driver for Analog Devices ADM1275 Hot-Swap Controller
 * and Digital Power Monitor
 *
 * 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.
 */

#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 <linux/bitops.h>
#include "pmbus.h"

enum chips { adm1075, adm1275, adm1276, adm1278, adm1293, adm1294 };

#define ADM1275_MFR_STATUS_IOUT_WARN2	BIT(0)
#define ADM1293_MFR_STATUS_VAUX_UV_WARN	BIT(5)
#define ADM1293_MFR_STATUS_VAUX_OV_WARN	BIT(6)

#define ADM1275_PEAK_IOUT		0xd0
#define ADM1275_PEAK_VIN		0xd1
#define ADM1275_PEAK_VOUT		0xd2
#define ADM1275_PMON_CONFIG		0xd4

#define ADM1275_VIN_VOUT_SELECT		BIT(6)
#define ADM1275_VRANGE			BIT(5)
#define ADM1075_IRANGE_50		BIT(4)
#define ADM1075_IRANGE_25		BIT(3)
#define ADM1075_IRANGE_MASK		(BIT(3) | BIT(4))

#define ADM1278_TEMP1_EN		BIT(3)
#define ADM1278_VIN_EN			BIT(2)
#define ADM1278_VOUT_EN			BIT(1)

#define ADM1293_IRANGE_25		0
#define ADM1293_IRANGE_50		BIT(6)
#define ADM1293_IRANGE_100		BIT(7)
#define ADM1293_IRANGE_200		(BIT(6) | BIT(7))
#define ADM1293_IRANGE_MASK		(BIT(6) | BIT(7))

#define ADM1293_VIN_SEL_012		BIT(2)
#define ADM1293_VIN_SEL_074		BIT(3)
#define ADM1293_VIN_SEL_210		(BIT(2) | BIT(3))
#define ADM1293_VIN_SEL_MASK		(BIT(2) | BIT(3))

#define ADM1293_VAUX_EN			BIT(1)

#define ADM1278_PEAK_TEMP		0xd7
#define ADM1275_IOUT_WARN2_LIMIT	0xd7
#define ADM1275_DEVICE_CONFIG		0xd8

#define ADM1275_IOUT_WARN2_SELECT	BIT(4)

#define ADM1276_PEAK_PIN		0xda
#define ADM1075_READ_VAUX		0xdd
#define ADM1075_VAUX_OV_WARN_LIMIT	0xde
#define ADM1075_VAUX_UV_WARN_LIMIT	0xdf
#define ADM1293_IOUT_MIN		0xe3
#define ADM1293_PIN_MIN			0xe4
#define ADM1075_VAUX_STATUS		0xf6

#define ADM1075_VAUX_OV_WARN		BIT(7)
#define ADM1075_VAUX_UV_WARN		BIT(6)

struct adm1275_data {
	int id;
	bool have_oc_fault;
	bool have_uc_fault;
	bool have_vout;
	bool have_vaux_status;
	bool have_mfr_vaux_status;
	bool have_iout_min;
	bool have_pin_min;
	bool have_pin_max;
	bool have_temp_max;
	struct pmbus_driver_info info;
};

#define to_adm1275_data(x)  container_of(x, struct adm1275_data, info)

struct coefficients {
	s16 m;
	s16 b;
	s16 R;
};

static const struct coefficients adm1075_coefficients[] = {
	[0] = { 27169, 0, -1 },		/* voltage */
	[1] = { 806, 20475, -1 },	/* current, irange25 */
	[2] = { 404, 20475, -1 },	/* current, irange50 */
	[3] = { 8549, 0, -1 },		/* power, irange25 */
	[4] = { 4279, 0, -1 },		/* power, irange50 */
};

static const struct coefficients adm1275_coefficients[] = {
	[0] = { 19199, 0, -2 },		/* voltage, vrange set */
	[1] = { 6720, 0, -1 },		/* voltage, vrange not set */
	[2] = { 807, 20475, -1 },	/* current */
};

static const struct coefficients adm1276_coefficients[] = {
	[0] = { 19199, 0, -2 },		/* voltage, vrange set */
	[1] = { 6720, 0, -1 },		/* voltage, vrange not set */
	[2] = { 807, 20475, -1 },	/* current */
	[3] = { 6043, 0, -2 },		/* power, vrange set */
	[4] = { 2115, 0, -1 },		/* power, vrange not set */
};

static const struct coefficients adm1278_coefficients[] = {
	[0] = { 19599, 0, -2 },		/* voltage */
	[1] = { 800, 20475, -1 },	/* current */
	[2] = { 6123, 0, -2 },		/* power */
	[3] = { 42, 31880, -1 },	/* temperature */
};

static const struct coefficients adm1293_coefficients[] = {
	[0] = { 3333, -1, 0 },		/* voltage, vrange 1.2V */
	[1] = { 5552, -5, -1 },		/* voltage, vrange 7.4V */
	[2] = { 19604, -50, -2 },	/* voltage, vrange 21V */
	[3] = { 8000, -100, -2 },	/* current, irange25 */
	[4] = { 4000, -100, -2 },	/* current, irange50 */
	[5] = { 20000, -1000, -3 },	/* current, irange100 */
	[6] = { 10000, -1000, -3 },	/* current, irange200 */
	[7] = { 10417, 0, -1 },		/* power, 1.2V, irange25 */
	[8] = { 5208, 0, -1 },		/* power, 1.2V, irange50 */
	[9] = { 26042, 0, -2 },		/* power, 1.2V, irange100 */
	[10] = { 13021, 0, -2 },	/* power, 1.2V, irange200 */
	[11] = { 17351, 0, -2 },	/* power, 7.4V, irange25 */
	[12] = { 8676, 0, -2 },		/* power, 7.4V, irange50 */
	[13] = { 4338, 0, -2 },		/* power, 7.4V, irange100 */
	[14] = { 21689, 0, -3 },	/* power, 7.4V, irange200 */
	[15] = { 6126, 0, -2 },		/* power, 21V, irange25 */
	[16] = { 30631, 0, -3 },	/* power, 21V, irange50 */
	[17] = { 15316, 0, -3 },	/* power, 21V, irange100 */
	[18] = { 7658, 0, -3 },		/* power, 21V, irange200 */
};

static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
{
	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
	const struct adm1275_data *data = to_adm1275_data(info);
	int ret = 0;

	if (page > 0)
		return -ENXIO;

	switch (reg) {
	case PMBUS_IOUT_UC_FAULT_LIMIT:
		if (!data->have_uc_fault)
			return -ENXIO;
		ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT);
		break;
	case PMBUS_IOUT_OC_FAULT_LIMIT:
		if (!data->have_oc_fault)
			return -ENXIO;
		ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT);
		break;
	case PMBUS_VOUT_OV_WARN_LIMIT:
		if (data->have_vout)
			return -ENODATA;
		ret = pmbus_read_word_data(client, 0,
					   ADM1075_VAUX_OV_WARN_LIMIT);
		break;
	case PMBUS_VOUT_UV_WARN_LIMIT:
		if (data->have_vout)
			return -ENODATA;
		ret = pmbus_read_word_data(client, 0,
					   ADM1075_VAUX_UV_WARN_LIMIT);
		break;
	case PMBUS_READ_VOUT:
		if (data->have_vout)
			return -ENODATA;
		ret = pmbus_read_word_data(client, 0, ADM1075_READ_VAUX);
		break;
	case PMBUS_VIRT_READ_IOUT_MIN:
		if (!data->have_iout_min)
			return -ENXIO;
		ret = pmbus_read_word_data(client, 0, ADM1293_IOUT_MIN);
		break;
	case PMBUS_VIRT_READ_IOUT_MAX:
		ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_IOUT);
		break;
	case PMBUS_VIRT_READ_VOUT_MAX:
		ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VOUT);
		break;
	case PMBUS_VIRT_READ_VIN_MAX:
		ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VIN);
		break;
	case PMBUS_VIRT_READ_PIN_MIN:
		if (!data->have_pin_min)
			return -ENXIO;
		ret = pmbus_read_word_data(client, 0, ADM1293_PIN_MIN);
		break;
	case PMBUS_VIRT_READ_PIN_MAX:
		if (!data->have_pin_max)
			return -ENXIO;
		ret = pmbus_read_word_data(client, 0, ADM1276_PEAK_PIN);
		break;
	case PMBUS_VIRT_READ_TEMP_MAX:
		if (!data->have_temp_max)
			return -ENXIO;
		ret = pmbus_read_word_data(client, 0, ADM1278_PEAK_TEMP);
		break;
	case PMBUS_VIRT_RESET_IOUT_HISTORY:
	case PMBUS_VIRT_RESET_VOUT_HISTORY:
	case PMBUS_VIRT_RESET_VIN_HISTORY:
		break;
	case PMBUS_VIRT_RESET_PIN_HISTORY:
		if (!data->have_pin_max)
			return -ENXIO;
		break;
	case PMBUS_VIRT_RESET_TEMP_HISTORY:
		if (!data->have_temp_max)
			return -ENXIO;
		break;
	default:
		ret = -ENODATA;
		break;
	}
	return ret;
}

static int adm1275_write_word_data(struct i2c_client *client, int page, int reg,
				   u16 word)
{
	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
	const struct adm1275_data *data = to_adm1275_data(info);
	int ret;

	if (page > 0)
		return -ENXIO;

	switch (reg) {
	case PMBUS_IOUT_UC_FAULT_LIMIT:
	case PMBUS_IOUT_OC_FAULT_LIMIT:
		ret = pmbus_write_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT,
					    word);
		break;
	case PMBUS_VIRT_RESET_IOUT_HISTORY:
		ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_IOUT, 0);
		if (!ret && data->have_iout_min)
			ret = pmbus_write_word_data(client, 0,
						    ADM1293_IOUT_MIN, 0);
		break;
	case PMBUS_VIRT_RESET_VOUT_HISTORY:
		ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VOUT, 0);
		break;
	case PMBUS_VIRT_RESET_VIN_HISTORY:
		ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VIN, 0);
		break;
	case PMBUS_VIRT_RESET_PIN_HISTORY:
		ret = pmbus_write_word_data(client, 0, ADM1276_PEAK_PIN, 0);
		if (!ret && data->have_pin_min)
			ret = pmbus_write_word_data(client, 0,
						    ADM1293_PIN_MIN, 0);
		break;
	case PMBUS_VIRT_RESET_TEMP_HISTORY:
		ret = pmbus_write_word_data(client, 0, ADM1278_PEAK_TEMP, 0);
		break;
	default:
		ret = -ENODATA;
		break;
	}
	return ret;
}

static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg)
{
	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
	const struct adm1275_data *data = to_adm1275_data(info);
	int mfr_status, ret;

	if (page > 0)
		return -ENXIO;

	switch (reg) {
	case PMBUS_STATUS_IOUT:
		ret = pmbus_read_byte_data(client, page, PMBUS_STATUS_IOUT);
		if (ret < 0)
			break;
		if (!data->have_oc_fault && !data->have_uc_fault)
			break;
		mfr_status = pmbus_read_byte_data(client, page,
						  PMBUS_STATUS_MFR_SPECIFIC);
		if (mfr_status < 0)
			return mfr_status;
		if (mfr_status & ADM1275_MFR_STATUS_IOUT_WARN2) {
			ret |= data->have_oc_fault ?
			  PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT;
		}
		break;
	case PMBUS_STATUS_VOUT:
		if (data->have_vout)
			return -ENODATA;
		ret = 0;
		if (data->have_vaux_status) {
			mfr_status = pmbus_read_byte_data(client, 0,
							  ADM1075_VAUX_STATUS);
			if (mfr_status < 0)
				return mfr_status;
			if (mfr_status & ADM1075_VAUX_OV_WARN)
				ret |= PB_VOLTAGE_OV_WARNING;
			if (mfr_status & ADM1075_VAUX_UV_WARN)
				ret |= PB_VOLTAGE_UV_WARNING;
		} else if (data->have_mfr_vaux_status) {
			mfr_status = pmbus_read_byte_data(client, page,
						PMBUS_STATUS_MFR_SPECIFIC);
			if (mfr_status < 0)
				return mfr_status;
			if (mfr_status & ADM1293_MFR_STATUS_VAUX_OV_WARN)
				ret |= PB_VOLTAGE_OV_WARNING;
			if (mfr_status & ADM1293_MFR_STATUS_VAUX_UV_WARN)
				ret |= PB_VOLTAGE_UV_WARNING;
		}
		break;
	default:
		ret = -ENODATA;
		break;
	}
	return ret;
}

static const struct i2c_device_id adm1275_id[] = {
	{ "adm1075", adm1075 },
	{ "adm1275", adm1275 },
	{ "adm1276", adm1276 },
	{ "adm1278", adm1278 },
	{ "adm1293", adm1293 },
	{ "adm1294", adm1294 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, adm1275_id);

static int adm1275_probe(struct i2c_client *client,
			 const struct i2c_device_id *id)
{
	u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1];
	int config, device_config;
	int ret;
	struct pmbus_driver_info *info;
	struct adm1275_data *data;
	const struct i2c_device_id *mid;
	const struct coefficients *coefficients;
	int vindex = -1, voindex = -1, cindex = -1, pindex = -1;
	int tindex = -1;

	if (!i2c_check_functionality(client->adapter,
				     I2C_FUNC_SMBUS_READ_BYTE_DATA
				     | I2C_FUNC_SMBUS_BLOCK_DATA))
		return -ENODEV;

	ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, block_buffer);
	if (ret < 0) {
		dev_err(&client->dev, "Failed to read Manufacturer ID\n");
		return ret;
	}
	if (ret != 3 || strncmp(block_buffer, "ADI", 3)) {
		dev_err(&client->dev, "Unsupported Manufacturer ID\n");
		return -ENODEV;
	}

	ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, block_buffer);
	if (ret < 0) {
		dev_err(&client->dev, "Failed to read Manufacturer Model\n");
		return ret;
	}
	for (mid = adm1275_id; mid->name[0]; mid++) {
		if (!strncasecmp(mid->name, block_buffer, strlen(mid->name)))
			break;
	}
	if (!mid->name[0]) {
		dev_err(&client->dev, "Unsupported device\n");
		return -ENODEV;
	}

	if (id->driver_data != mid->driver_data)
		dev_notice(&client->dev,
			   "Device mismatch: Configured %s, detected %s\n",
			   id->name, mid->name);

	config = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
	if (config < 0)
		return config;

	device_config = i2c_smbus_read_byte_data(client, ADM1275_DEVICE_CONFIG);
	if (device_config < 0)
		return device_config;

	data = devm_kzalloc(&client->dev, sizeof(struct adm1275_data),
			    GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	data->id = mid->driver_data;

	info = &data->info;

	info->pages = 1;
	info->format[PSC_VOLTAGE_IN] = direct;
	info->format[PSC_VOLTAGE_OUT] = direct;
	info->format[PSC_CURRENT_OUT] = direct;
	info->format[PSC_POWER] = direct;
	info->format[PSC_TEMPERATURE] = direct;
	info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT;

	info->read_word_data = adm1275_read_word_data;
	info->read_byte_data = adm1275_read_byte_data;
	info->write_word_data = adm1275_write_word_data;

	switch (data->id) {
	case adm1075:
		if (device_config & ADM1275_IOUT_WARN2_SELECT)
			data->have_oc_fault = true;
		else
			data->have_uc_fault = true;
		data->have_pin_max = true;
		data->have_vaux_status = true;

		coefficients = adm1075_coefficients;
		vindex = 0;
		switch (config & ADM1075_IRANGE_MASK) {
		case ADM1075_IRANGE_25:
			cindex = 1;
			pindex = 3;
			break;
		case ADM1075_IRANGE_50:
			cindex = 2;
			pindex = 4;
			break;
		default:
			dev_err(&client->dev, "Invalid input current range");
			break;
		}

		info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
		  | PMBUS_HAVE_STATUS_INPUT;
		if (config & ADM1275_VIN_VOUT_SELECT)
			info->func[0] |=
			  PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
		break;
	case adm1275:
		if (device_config & ADM1275_IOUT_WARN2_SELECT)
			data->have_oc_fault = true;
		else
			data->have_uc_fault = true;
		data->have_vout = true;

		coefficients = adm1275_coefficients;
		vindex = (config & ADM1275_VRANGE) ? 0 : 1;
		cindex = 2;

		if (config & ADM1275_VIN_VOUT_SELECT)
			info->func[0] |=
			  PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
		else
			info->func[0] |=
			  PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
		break;
	case adm1276:
		if (device_config & ADM1275_IOUT_WARN2_SELECT)
			data->have_oc_fault = true;
		else
			data->have_uc_fault = true;
		data->have_vout = true;
		data->have_pin_max = true;

		coefficients = adm1276_coefficients;
		vindex = (config & ADM1275_VRANGE) ? 0 : 1;
		cindex = 2;
		pindex = (config & ADM1275_VRANGE) ? 3 : 4;

		info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
		  | PMBUS_HAVE_STATUS_INPUT;
		if (config & ADM1275_VIN_VOUT_SELECT)
			info->func[0] |=
			  PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
		break;
	case adm1278:
		data->have_vout = true;
		data->have_pin_max = true;
		data->have_temp_max = true;

		coefficients = adm1278_coefficients;
		vindex = 0;
		cindex = 1;
		pindex = 2;
		tindex = 3;

		info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
			PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;

		/* Enable VOUT if not enabled (it is disabled by default) */
		if (!(config & ADM1278_VOUT_EN)) {
			config |= ADM1278_VOUT_EN;
			ret = i2c_smbus_write_byte_data(client,
							ADM1275_PMON_CONFIG,
							config);
			if (ret < 0) {
				dev_err(&client->dev,
					"Failed to enable VOUT monitoring\n");
				return -ENODEV;
			}
		}

		if (config & ADM1278_TEMP1_EN)
			info->func[0] |=
				PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
		if (config & ADM1278_VIN_EN)
			info->func[0] |= PMBUS_HAVE_VIN;
		break;
	case adm1293:
	case adm1294:
		data->have_iout_min = true;
		data->have_pin_min = true;
		data->have_pin_max = true;
		data->have_mfr_vaux_status = true;

		coefficients = adm1293_coefficients;

		voindex = 0;
		switch (config & ADM1293_VIN_SEL_MASK) {
		case ADM1293_VIN_SEL_012:	/* 1.2V */
			vindex = 0;
			break;
		case ADM1293_VIN_SEL_074:	/* 7.4V */
			vindex = 1;
			break;
		case ADM1293_VIN_SEL_210:	/* 21V */
			vindex = 2;
			break;
		default:			/* disabled */
			break;
		}

		switch (config & ADM1293_IRANGE_MASK) {
		case ADM1293_IRANGE_25:
			cindex = 3;
			break;
		case ADM1293_IRANGE_50:
			cindex = 4;
			break;
		case ADM1293_IRANGE_100:
			cindex = 5;
			break;
		case ADM1293_IRANGE_200:
			cindex = 6;
			break;
		}

		if (vindex >= 0)
			pindex = 7 + vindex * 4 + (cindex - 3);

		if (config & ADM1293_VAUX_EN)
			info->func[0] |=
				PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;

		info->func[0] |= PMBUS_HAVE_PIN |
			PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;

		break;
	default:
		dev_err(&client->dev, "Unsupported device\n");
		return -ENODEV;
	}

	if (voindex < 0)
		voindex = vindex;
	if (vindex >= 0) {
		info->m[PSC_VOLTAGE_IN] = coefficients[vindex].m;
		info->b[PSC_VOLTAGE_IN] = coefficients[vindex].b;
		info->R[PSC_VOLTAGE_IN] = coefficients[vindex].R;
	}
	if (voindex >= 0) {
		info->m[PSC_VOLTAGE_OUT] = coefficients[voindex].m;
		info->b[PSC_VOLTAGE_OUT] = coefficients[voindex].b;
		info->R[PSC_VOLTAGE_OUT] = coefficients[voindex].R;
	}
	if (cindex >= 0) {
		info->m[PSC_CURRENT_OUT] = coefficients[cindex].m;
		info->b[PSC_CURRENT_OUT] = coefficients[cindex].b;
		info->R[PSC_CURRENT_OUT] = coefficients[cindex].R;
	}
	if (pindex >= 0) {
		info->m[PSC_POWER] = coefficients[pindex].m;
		info->b[PSC_POWER] = coefficients[pindex].b;
		info->R[PSC_POWER] = coefficients[pindex].R;
	}
	if (tindex >= 0) {
		info->m[PSC_TEMPERATURE] = coefficients[tindex].m;
		info->b[PSC_TEMPERATURE] = coefficients[tindex].b;
		info->R[PSC_TEMPERATURE] = coefficients[tindex].R;
	}

	return pmbus_do_probe(client, id, info);
}

static struct i2c_driver adm1275_driver = {
	.driver = {
		   .name = "adm1275",
		   },
	.probe = adm1275_probe,
	.remove = pmbus_do_remove,
	.id_table = adm1275_id,
};

module_i2c_driver(adm1275_driver);

MODULE_AUTHOR("Guenter Roeck");
MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275 and compatibles");
MODULE_LICENSE("GPL");
Commit	Line	Data
83f7649c GR	1	/*
	2	* Hardware monitoring driver for Analog Devices ADM1275 Hot-Swap Controller
	3	* and Digital Power Monitor
	4	*
	5	* Copyright (c) 2011 Ericsson AB.
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*/
	17
	18	#include <linux/kernel.h>
	19	#include <linux/module.h>
	20	#include <linux/init.h>
	21	#include <linux/err.h>
	22	#include <linux/slab.h>
	23	#include <linux/i2c.h>
99b41608	24	#include <linux/bitops.h>
83f7649c GR	25	#include "pmbus.h"
83f7649c GR	26
709066ac	27	enum chips { adm1075, adm1275, adm1276, adm1278, adm1293, adm1294 };
68a40382 GR	28
	29	#define ADM1275_MFR_STATUS_IOUT_WARN2 BIT(0)
	30	#define ADM1293_MFR_STATUS_VAUX_UV_WARN BIT(5)
	31	#define ADM1293_MFR_STATUS_VAUX_OV_WARN BIT(6)
5cf231a3	32
c576e30c GR	33	#define ADM1275_PEAK_IOUT 0xd0
	34	#define ADM1275_PEAK_VIN 0xd1
	35	#define ADM1275_PEAK_VOUT 0xd2
83f7649c GR	36	#define ADM1275_PMON_CONFIG 0xd4
83f7649c GR	37
99b41608 GR	38	#define ADM1275_VIN_VOUT_SELECT BIT(6)
	39	#define ADM1275_VRANGE BIT(5)
	40	#define ADM1075_IRANGE_50 BIT(4)
	41	#define ADM1075_IRANGE_25 BIT(3)
	42	#define ADM1075_IRANGE_MASK (BIT(3) \| BIT(4))
83f7649c	43
709066ac GR	44	#define ADM1278_TEMP1_EN BIT(3)
	45	#define ADM1278_VIN_EN BIT(2)
	46	#define ADM1278_VOUT_EN BIT(1)
	47
68a40382 GR	48	#define ADM1293_IRANGE_25 0
	49	#define ADM1293_IRANGE_50 BIT(6)
	50	#define ADM1293_IRANGE_100 BIT(7)
	51	#define ADM1293_IRANGE_200 (BIT(6) \| BIT(7))
	52	#define ADM1293_IRANGE_MASK (BIT(6) \| BIT(7))
	53
	54	#define ADM1293_VIN_SEL_012 BIT(2)
	55	#define ADM1293_VIN_SEL_074 BIT(3)
	56	#define ADM1293_VIN_SEL_210 (BIT(2) \| BIT(3))
	57	#define ADM1293_VIN_SEL_MASK (BIT(2) \| BIT(3))
	58
	59	#define ADM1293_VAUX_EN BIT(1)
	60
709066ac	61	#define ADM1278_PEAK_TEMP 0xd7
c5e67636 GR	62	#define ADM1275_IOUT_WARN2_LIMIT 0xd7
	63	#define ADM1275_DEVICE_CONFIG 0xd8
	64
99b41608	65	#define ADM1275_IOUT_WARN2_SELECT BIT(4)
c5e67636	66
5cf231a3	67	#define ADM1276_PEAK_PIN 0xda
92711269 GR	68	#define ADM1075_READ_VAUX 0xdd
	69	#define ADM1075_VAUX_OV_WARN_LIMIT 0xde
	70	#define ADM1075_VAUX_UV_WARN_LIMIT 0xdf
68a40382 GR	71	#define ADM1293_IOUT_MIN 0xe3
68a40382 GR	72	#define ADM1293_PIN_MIN 0xe4
92711269 GR	73	#define ADM1075_VAUX_STATUS 0xf6
92711269 GR	74
99b41608 GR	75	#define ADM1075_VAUX_OV_WARN BIT(7)
99b41608 GR	76	#define ADM1075_VAUX_UV_WARN BIT(6)
92711269	77
c5e67636	78	struct adm1275_data {
5cf231a3	79	int id;
c5e67636	80	bool have_oc_fault;
9048539b GR	81	bool have_uc_fault;
	82	bool have_vout;
	83	bool have_vaux_status;
68a40382 GR	84	bool have_mfr_vaux_status;
	85	bool have_iout_min;
	86	bool have_pin_min;
9048539b	87	bool have_pin_max;
709066ac	88	bool have_temp_max;
c5e67636 GR	89	struct pmbus_driver_info info;
	90	};
	91
	92	#define to_adm1275_data(x) container_of(x, struct adm1275_data, info)
	93
904b296f GR	94	struct coefficients {
	95	s16 m;
	96	s16 b;
	97	s16 R;
	98	};
	99
	100	static const struct coefficients adm1075_coefficients[] = {
	101	[0] = { 27169, 0, -1 }, /* voltage */
	102	[1] = { 806, 20475, -1 }, /* current, irange25 */
	103	[2] = { 404, 20475, -1 }, /* current, irange50 */
6faecba0 SD	104	[3] = { 8549, 0, -1 }, /* power, irange25 */
6faecba0 SD	105	[4] = { 4279, 0, -1 }, /* power, irange50 */
904b296f GR	106	};
	107
	108	static const struct coefficients adm1275_coefficients[] = {
	109	[0] = { 19199, 0, -2 }, /* voltage, vrange set */
	110	[1] = { 6720, 0, -1 }, /* voltage, vrange not set */
	111	[2] = { 807, 20475, -1 }, /* current */
	112	};
	113
	114	static const struct coefficients adm1276_coefficients[] = {
	115	[0] = { 19199, 0, -2 }, /* voltage, vrange set */
	116	[1] = { 6720, 0, -1 }, /* voltage, vrange not set */
	117	[2] = { 807, 20475, -1 }, /* current */
	118	[3] = { 6043, 0, -2 }, /* power, vrange set */
	119	[4] = { 2115, 0, -1 }, /* power, vrange not set */
	120	};
	121
709066ac GR	122	static const struct coefficients adm1278_coefficients[] = {
	123	[0] = { 19599, 0, -2 }, /* voltage */
	124	[1] = { 800, 20475, -1 }, /* current */
	125	[2] = { 6123, 0, -2 }, /* power */
	126	[3] = { 42, 31880, -1 }, /* temperature */
	127	};
	128
68a40382 GR	129	static const struct coefficients adm1293_coefficients[] = {
	130	[0] = { 3333, -1, 0 }, /* voltage, vrange 1.2V */
	131	[1] = { 5552, -5, -1 }, /* voltage, vrange 7.4V */
	132	[2] = { 19604, -50, -2 }, /* voltage, vrange 21V */
	133	[3] = { 8000, -100, -2 }, /* current, irange25 */
	134	[4] = { 4000, -100, -2 }, /* current, irange50 */
	135	[5] = { 20000, -1000, -3 }, /* current, irange100 */
	136	[6] = { 10000, -1000, -3 }, /* current, irange200 */
	137	[7] = { 10417, 0, -1 }, /* power, 1.2V, irange25 */
	138	[8] = { 5208, 0, -1 }, /* power, 1.2V, irange50 */
	139	[9] = { 26042, 0, -2 }, /* power, 1.2V, irange100 */
	140	[10] = { 13021, 0, -2 }, /* power, 1.2V, irange200 */
	141	[11] = { 17351, 0, -2 }, /* power, 7.4V, irange25 */
	142	[12] = { 8676, 0, -2 }, /* power, 7.4V, irange50 */
	143	[13] = { 4338, 0, -2 }, /* power, 7.4V, irange100 */
	144	[14] = { 21689, 0, -3 }, /* power, 7.4V, irange200 */
	145	[15] = { 6126, 0, -2 }, /* power, 21V, irange25 */
	146	[16] = { 30631, 0, -3 }, /* power, 21V, irange50 */
	147	[17] = { 15316, 0, -3 }, /* power, 21V, irange100 */
	148	[18] = { 7658, 0, -3 }, /* power, 21V, irange200 */
	149	};
	150
c576e30c GR	151	static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
c576e30c GR	152	{
c5e67636 GR	153	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
c5e67636 GR	154	const struct adm1275_data *data = to_adm1275_data(info);
5cf231a3	155	int ret = 0;
c576e30c	156
63bf5ad0	157	if (page > 0)
c5e67636	158	return -ENXIO;
c576e30c GR	159
c576e30c GR	160	switch (reg) {
c5e67636	161	case PMBUS_IOUT_UC_FAULT_LIMIT:
9048539b GR	162	if (!data->have_uc_fault)
9048539b GR	163	return -ENXIO;
c5e67636 GR	164	ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT);
	165	break;
	166	case PMBUS_IOUT_OC_FAULT_LIMIT:
9048539b GR	167	if (!data->have_oc_fault)
9048539b GR	168	return -ENXIO;
c5e67636 GR	169	ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT);
c5e67636 GR	170	break;
92711269	171	case PMBUS_VOUT_OV_WARN_LIMIT:
9048539b GR	172	if (data->have_vout)
9048539b GR	173	return -ENODATA;
92711269 GR	174	ret = pmbus_read_word_data(client, 0,
	175	ADM1075_VAUX_OV_WARN_LIMIT);
	176	break;
	177	case PMBUS_VOUT_UV_WARN_LIMIT:
9048539b GR	178	if (data->have_vout)
9048539b GR	179	return -ENODATA;
92711269 GR	180	ret = pmbus_read_word_data(client, 0,
	181	ADM1075_VAUX_UV_WARN_LIMIT);
	182	break;
	183	case PMBUS_READ_VOUT:
9048539b GR	184	if (data->have_vout)
9048539b GR	185	return -ENODATA;
92711269 GR	186	ret = pmbus_read_word_data(client, 0, ADM1075_READ_VAUX);
92711269 GR	187	break;
68a40382 GR	188	case PMBUS_VIRT_READ_IOUT_MIN:
	189	if (!data->have_iout_min)
	190	return -ENXIO;
	191	ret = pmbus_read_word_data(client, 0, ADM1293_IOUT_MIN);
	192	break;
c576e30c GR	193	case PMBUS_VIRT_READ_IOUT_MAX:
	194	ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_IOUT);
	195	break;
	196	case PMBUS_VIRT_READ_VOUT_MAX:
	197	ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VOUT);
	198	break;
	199	case PMBUS_VIRT_READ_VIN_MAX:
	200	ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VIN);
	201	break;
68a40382 GR	202	case PMBUS_VIRT_READ_PIN_MIN:
	203	if (!data->have_pin_min)
	204	return -ENXIO;
	205	ret = pmbus_read_word_data(client, 0, ADM1293_PIN_MIN);
	206	break;
5cf231a3	207	case PMBUS_VIRT_READ_PIN_MAX:
9048539b GR	208	if (!data->have_pin_max)
9048539b GR	209	return -ENXIO;
5cf231a3 GR	210	ret = pmbus_read_word_data(client, 0, ADM1276_PEAK_PIN);
5cf231a3 GR	211	break;
709066ac GR	212	case PMBUS_VIRT_READ_TEMP_MAX:
	213	if (!data->have_temp_max)
	214	return -ENXIO;
	215	ret = pmbus_read_word_data(client, 0, ADM1278_PEAK_TEMP);
	216	break;
c576e30c GR	217	case PMBUS_VIRT_RESET_IOUT_HISTORY:
	218	case PMBUS_VIRT_RESET_VOUT_HISTORY:
	219	case PMBUS_VIRT_RESET_VIN_HISTORY:
5cf231a3 GR	220	break;
5cf231a3 GR	221	case PMBUS_VIRT_RESET_PIN_HISTORY:
9048539b GR	222	if (!data->have_pin_max)
9048539b GR	223	return -ENXIO;
c576e30c	224	break;
709066ac GR	225	case PMBUS_VIRT_RESET_TEMP_HISTORY:
	226	if (!data->have_temp_max)
	227	return -ENXIO;
	228	break;
c576e30c GR	229	default:
	230	ret = -ENODATA;
	231	break;
	232	}
	233	return ret;
	234	}
	235
	236	static int adm1275_write_word_data(struct i2c_client *client, int page, int reg,
	237	u16 word)
	238	{
68a40382 GR	239	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
68a40382 GR	240	const struct adm1275_data *data = to_adm1275_data(info);
c576e30c GR	241	int ret;
c576e30c GR	242
63bf5ad0	243	if (page > 0)
c5e67636	244	return -ENXIO;
c576e30c GR	245
c576e30c GR	246	switch (reg) {
c5e67636 GR	247	case PMBUS_IOUT_UC_FAULT_LIMIT:
	248	case PMBUS_IOUT_OC_FAULT_LIMIT:
	249	ret = pmbus_write_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT,
	250	word);
	251	break;
c576e30c GR	252	case PMBUS_VIRT_RESET_IOUT_HISTORY:
c576e30c GR	253	ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_IOUT, 0);
68a40382 GR	254	if (!ret && data->have_iout_min)
	255	ret = pmbus_write_word_data(client, 0,
	256	ADM1293_IOUT_MIN, 0);
c576e30c GR	257	break;
	258	case PMBUS_VIRT_RESET_VOUT_HISTORY:
	259	ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VOUT, 0);
	260	break;
	261	case PMBUS_VIRT_RESET_VIN_HISTORY:
	262	ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VIN, 0);
	263	break;
5cf231a3 GR	264	case PMBUS_VIRT_RESET_PIN_HISTORY:
5cf231a3 GR	265	ret = pmbus_write_word_data(client, 0, ADM1276_PEAK_PIN, 0);
68a40382 GR	266	if (!ret && data->have_pin_min)
	267	ret = pmbus_write_word_data(client, 0,
	268	ADM1293_PIN_MIN, 0);
5cf231a3	269	break;
709066ac GR	270	case PMBUS_VIRT_RESET_TEMP_HISTORY:
	271	ret = pmbus_write_word_data(client, 0, ADM1278_PEAK_TEMP, 0);
	272	break;
c576e30c GR	273	default:
	274	ret = -ENODATA;
	275	break;
	276	}
	277	return ret;
	278	}
	279
c5e67636 GR	280	static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg)
	281	{
	282	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
	283	const struct adm1275_data *data = to_adm1275_data(info);
	284	int mfr_status, ret;
	285
da8e48ab	286	if (page > 0)
c5e67636 GR	287	return -ENXIO;
	288
	289	switch (reg) {
	290	case PMBUS_STATUS_IOUT:
	291	ret = pmbus_read_byte_data(client, page, PMBUS_STATUS_IOUT);
	292	if (ret < 0)
	293	break;
9048539b GR	294	if (!data->have_oc_fault && !data->have_uc_fault)
9048539b GR	295	break;
c5e67636 GR	296	mfr_status = pmbus_read_byte_data(client, page,
c5e67636 GR	297	PMBUS_STATUS_MFR_SPECIFIC);
9048539b GR	298	if (mfr_status < 0)
9048539b GR	299	return mfr_status;
c5e67636 GR	300	if (mfr_status & ADM1275_MFR_STATUS_IOUT_WARN2) {
	301	ret \|= data->have_oc_fault ?
	302	PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT;
	303	}
	304	break;
92711269	305	case PMBUS_STATUS_VOUT:
9048539b GR	306	if (data->have_vout)
9048539b GR	307	return -ENODATA;
92711269	308	ret = 0;
9048539b GR	309	if (data->have_vaux_status) {
	310	mfr_status = pmbus_read_byte_data(client, 0,
	311	ADM1075_VAUX_STATUS);
	312	if (mfr_status < 0)
	313	return mfr_status;
	314	if (mfr_status & ADM1075_VAUX_OV_WARN)
	315	ret \|= PB_VOLTAGE_OV_WARNING;
	316	if (mfr_status & ADM1075_VAUX_UV_WARN)
	317	ret \|= PB_VOLTAGE_UV_WARNING;
68a40382 GR	318	} else if (data->have_mfr_vaux_status) {
	319	mfr_status = pmbus_read_byte_data(client, page,
	320	PMBUS_STATUS_MFR_SPECIFIC);
	321	if (mfr_status < 0)
	322	return mfr_status;
	323	if (mfr_status & ADM1293_MFR_STATUS_VAUX_OV_WARN)
	324	ret \|= PB_VOLTAGE_OV_WARNING;
	325	if (mfr_status & ADM1293_MFR_STATUS_VAUX_UV_WARN)
	326	ret \|= PB_VOLTAGE_UV_WARNING;
9048539b	327	}
92711269	328	break;
c5e67636 GR	329	default:
	330	ret = -ENODATA;
	331	break;
	332	}
	333	return ret;
	334	}
	335
87102808	336	static const struct i2c_device_id adm1275_id[] = {
92711269	337	{ "adm1075", adm1075 },
87102808 GR	338	{ "adm1275", adm1275 },
87102808 GR	339	{ "adm1276", adm1276 },
709066ac	340	{ "adm1278", adm1278 },
68a40382 GR	341	{ "adm1293", adm1293 },
68a40382 GR	342	{ "adm1294", adm1294 },
87102808 GR	343	{ }
	344	};
	345	MODULE_DEVICE_TABLE(i2c, adm1275_id);
	346
83f7649c GR	347	static int adm1275_probe(struct i2c_client *client,
	348	const struct i2c_device_id *id)
	349	{
87102808	350	u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1];
c5e67636	351	int config, device_config;
3b33ca41	352	int ret;
83f7649c	353	struct pmbus_driver_info *info;
c5e67636	354	struct adm1275_data *data;
87102808	355	const struct i2c_device_id *mid;
904b296f	356	const struct coefficients *coefficients;
68a40382	357	int vindex = -1, voindex = -1, cindex = -1, pindex = -1;
709066ac	358	int tindex = -1;
83f7649c GR	359
83f7649c GR	360	if (!i2c_check_functionality(client->adapter,
87102808 GR	361	I2C_FUNC_SMBUS_READ_BYTE_DATA
87102808 GR	362	\| I2C_FUNC_SMBUS_BLOCK_DATA))
83f7649c GR	363	return -ENODEV;
83f7649c GR	364
87102808 GR	365	ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, block_buffer);
	366	if (ret < 0) {
	367	dev_err(&client->dev, "Failed to read Manufacturer ID\n");
	368	return ret;
	369	}
	370	if (ret != 3 \|\| strncmp(block_buffer, "ADI", 3)) {
	371	dev_err(&client->dev, "Unsupported Manufacturer ID\n");
	372	return -ENODEV;
	373	}
83f7649c	374
87102808 GR	375	ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, block_buffer);
	376	if (ret < 0) {
	377	dev_err(&client->dev, "Failed to read Manufacturer Model\n");
	378	return ret;
	379	}
	380	for (mid = adm1275_id; mid->name[0]; mid++) {
	381	if (!strncasecmp(mid->name, block_buffer, strlen(mid->name)))
	382	break;
	383	}
	384	if (!mid->name[0]) {
	385	dev_err(&client->dev, "Unsupported device\n");
	386	return -ENODEV;
3b33ca41	387	}
83f7649c	388
87102808 GR	389	if (id->driver_data != mid->driver_data)
	390	dev_notice(&client->dev,
	391	"Device mismatch: Configured %s, detected %s\n",
	392	id->name, mid->name);
	393
	394	config = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
	395	if (config < 0)
	396	return config;
	397
c5e67636	398	device_config = i2c_smbus_read_byte_data(client, ADM1275_DEVICE_CONFIG);
87102808 GR	399	if (device_config < 0)
	400	return device_config;
	401
8b313ca7 GR	402	data = devm_kzalloc(&client->dev, sizeof(struct adm1275_data),
8b313ca7 GR	403	GFP_KERNEL);
87102808 GR	404	if (!data)
	405	return -ENOMEM;
	406
	407	data->id = mid->driver_data;
c5e67636 GR	408
	409	info = &data->info;
	410
83f7649c	411	info->pages = 1;
1061d851 GR	412	info->format[PSC_VOLTAGE_IN] = direct;
	413	info->format[PSC_VOLTAGE_OUT] = direct;
	414	info->format[PSC_CURRENT_OUT] = direct;
904b296f	415	info->format[PSC_POWER] = direct;
709066ac	416	info->format[PSC_TEMPERATURE] = direct;
83f7649c GR	417	info->func[0] = PMBUS_HAVE_IOUT \| PMBUS_HAVE_STATUS_IOUT;
83f7649c GR	418
c576e30c	419	info->read_word_data = adm1275_read_word_data;
c5e67636	420	info->read_byte_data = adm1275_read_byte_data;
c576e30c GR	421	info->write_word_data = adm1275_write_word_data;
c576e30c GR	422
87102808	423	switch (data->id) {
92711269	424	case adm1075:
9048539b GR	425	if (device_config & ADM1275_IOUT_WARN2_SELECT)
	426	data->have_oc_fault = true;
	427	else
	428	data->have_uc_fault = true;
	429	data->have_pin_max = true;
	430	data->have_vaux_status = true;
	431
904b296f GR	432	coefficients = adm1075_coefficients;
904b296f GR	433	vindex = 0;
92711269 GR	434	switch (config & ADM1075_IRANGE_MASK) {
92711269 GR	435	case ADM1075_IRANGE_25:
904b296f GR	436	cindex = 1;
904b296f GR	437	pindex = 3;
92711269 GR	438	break;
92711269 GR	439	case ADM1075_IRANGE_50:
904b296f GR	440	cindex = 2;
904b296f GR	441	pindex = 4;
92711269 GR	442	break;
	443	default:
	444	dev_err(&client->dev, "Invalid input current range");
92711269 GR	445	break;
92711269 GR	446	}
904b296f	447
92711269 GR	448	info->func[0] \|= PMBUS_HAVE_VIN \| PMBUS_HAVE_PIN
	449	\| PMBUS_HAVE_STATUS_INPUT;
	450	if (config & ADM1275_VIN_VOUT_SELECT)
	451	info->func[0] \|=
	452	PMBUS_HAVE_VOUT \| PMBUS_HAVE_STATUS_VOUT;
	453	break;
5cf231a3	454	case adm1275:
9048539b GR	455	if (device_config & ADM1275_IOUT_WARN2_SELECT)
	456	data->have_oc_fault = true;
	457	else
	458	data->have_uc_fault = true;
	459	data->have_vout = true;
	460
904b296f GR	461	coefficients = adm1275_coefficients;
	462	vindex = (config & ADM1275_VRANGE) ? 0 : 1;
	463	cindex = 2;
	464
5cf231a3 GR	465	if (config & ADM1275_VIN_VOUT_SELECT)
	466	info->func[0] \|=
	467	PMBUS_HAVE_VOUT \| PMBUS_HAVE_STATUS_VOUT;
	468	else
	469	info->func[0] \|=
	470	PMBUS_HAVE_VIN \| PMBUS_HAVE_STATUS_INPUT;
	471	break;
	472	case adm1276:
9048539b GR	473	if (device_config & ADM1275_IOUT_WARN2_SELECT)
	474	data->have_oc_fault = true;
	475	else
	476	data->have_uc_fault = true;
	477	data->have_vout = true;
	478	data->have_pin_max = true;
	479
904b296f GR	480	coefficients = adm1276_coefficients;
	481	vindex = (config & ADM1275_VRANGE) ? 0 : 1;
	482	cindex = 2;
	483	pindex = (config & ADM1275_VRANGE) ? 3 : 4;
	484
5cf231a3 GR	485	info->func[0] \|= PMBUS_HAVE_VIN \| PMBUS_HAVE_PIN
	486	\| PMBUS_HAVE_STATUS_INPUT;
	487	if (config & ADM1275_VIN_VOUT_SELECT)
	488	info->func[0] \|=
	489	PMBUS_HAVE_VOUT \| PMBUS_HAVE_STATUS_VOUT;
5cf231a3	490	break;
709066ac GR	491	case adm1278:
	492	data->have_vout = true;
	493	data->have_pin_max = true;
	494	data->have_temp_max = true;
	495
	496	coefficients = adm1278_coefficients;
	497	vindex = 0;
	498	cindex = 1;
	499	pindex = 2;
	500	tindex = 3;
	501
2b3d0c19 YL	502	info->func[0] \|= PMBUS_HAVE_PIN \| PMBUS_HAVE_STATUS_INPUT \|
	503	PMBUS_HAVE_VOUT \| PMBUS_HAVE_STATUS_VOUT;
	504
	505	/* Enable VOUT if not enabled (it is disabled by default) */
	506	if (!(config & ADM1278_VOUT_EN)) {
	507	config \|= ADM1278_VOUT_EN;
	508	ret = i2c_smbus_write_byte_data(client,
	509	ADM1275_PMON_CONFIG,
	510	config);
	511	if (ret < 0) {
	512	dev_err(&client->dev,
	513	"Failed to enable VOUT monitoring\n");
	514	return -ENODEV;
	515	}
	516	}
	517
709066ac GR	518	if (config & ADM1278_TEMP1_EN)
	519	info->func[0] \|=
	520	PMBUS_HAVE_TEMP \| PMBUS_HAVE_STATUS_TEMP;
	521	if (config & ADM1278_VIN_EN)
	522	info->func[0] \|= PMBUS_HAVE_VIN;
709066ac	523	break;
68a40382 GR	524	case adm1293:
	525	case adm1294:
	526	data->have_iout_min = true;
	527	data->have_pin_min = true;
	528	data->have_pin_max = true;
	529	data->have_mfr_vaux_status = true;
	530
	531	coefficients = adm1293_coefficients;
	532
	533	voindex = 0;
	534	switch (config & ADM1293_VIN_SEL_MASK) {
	535	case ADM1293_VIN_SEL_012: /* 1.2V */
	536	vindex = 0;
	537	break;
	538	case ADM1293_VIN_SEL_074: /* 7.4V */
	539	vindex = 1;
	540	break;
	541	case ADM1293_VIN_SEL_210: /* 21V */
	542	vindex = 2;
	543	break;
	544	default: /* disabled */
	545	break;
	546	}
	547
	548	switch (config & ADM1293_IRANGE_MASK) {
	549	case ADM1293_IRANGE_25:
	550	cindex = 3;
	551	break;
	552	case ADM1293_IRANGE_50:
	553	cindex = 4;
	554	break;
	555	case ADM1293_IRANGE_100:
	556	cindex = 5;
	557	break;
	558	case ADM1293_IRANGE_200:
	559	cindex = 6;
	560	break;
	561	}
	562
	563	if (vindex >= 0)
	564	pindex = 7 + vindex * 4 + (cindex - 3);
	565
	566	if (config & ADM1293_VAUX_EN)
	567	info->func[0] \|=
	568	PMBUS_HAVE_VOUT \| PMBUS_HAVE_STATUS_VOUT;
	569
	570	info->func[0] \|= PMBUS_HAVE_PIN \|
	571	PMBUS_HAVE_VIN \| PMBUS_HAVE_STATUS_INPUT;
	572
	573	break;
904b296f GR	574	default:
	575	dev_err(&client->dev, "Unsupported device\n");
	576	return -ENODEV;
	577	}
68a40382 GR	578
	579	if (voindex < 0)
	580	voindex = vindex;
904b296f GR	581	if (vindex >= 0) {
	582	info->m[PSC_VOLTAGE_IN] = coefficients[vindex].m;
	583	info->b[PSC_VOLTAGE_IN] = coefficients[vindex].b;
	584	info->R[PSC_VOLTAGE_IN] = coefficients[vindex].R;
68a40382 GR	585	}
	586	if (voindex >= 0) {
	587	info->m[PSC_VOLTAGE_OUT] = coefficients[voindex].m;
	588	info->b[PSC_VOLTAGE_OUT] = coefficients[voindex].b;
	589	info->R[PSC_VOLTAGE_OUT] = coefficients[voindex].R;
904b296f GR	590	}
	591	if (cindex >= 0) {
	592	info->m[PSC_CURRENT_OUT] = coefficients[cindex].m;
	593	info->b[PSC_CURRENT_OUT] = coefficients[cindex].b;
	594	info->R[PSC_CURRENT_OUT] = coefficients[cindex].R;
	595	}
	596	if (pindex >= 0) {
	597	info->m[PSC_POWER] = coefficients[pindex].m;
	598	info->b[PSC_POWER] = coefficients[pindex].b;
	599	info->R[PSC_POWER] = coefficients[pindex].R;
5cf231a3	600	}
709066ac GR	601	if (tindex >= 0) {
	602	info->m[PSC_TEMPERATURE] = coefficients[tindex].m;
	603	info->b[PSC_TEMPERATURE] = coefficients[tindex].b;
	604	info->R[PSC_TEMPERATURE] = coefficients[tindex].R;
	605	}
83f7649c	606
8b313ca7	607	return pmbus_do_probe(client, id, info);
83f7649c GR	608	}
83f7649c GR	609
83f7649c GR	610	static struct i2c_driver adm1275_driver = {
	611	.driver = {
	612	.name = "adm1275",
	613	},
	614	.probe = adm1275_probe,
dd285ad7	615	.remove = pmbus_do_remove,
83f7649c GR	616	.id_table = adm1275_id,
	617	};
	618
f0967eea	619	module_i2c_driver(adm1275_driver);
83f7649c GR	620
83f7649c GR	621	MODULE_AUTHOR("Guenter Roeck");
5cf231a3	622	MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275 and compatibles");
83f7649c	623	MODULE_LICENSE("GPL");