[mirror_ubuntu-bionic-kernel.git] / drivers / hwmon / pmbus / lm25066.c

/*
 * Hardware monitoring driver for LM25056 / LM25063 / LM25066 / LM5064 / LM5066
 *
 * Copyright (c) 2011 Ericsson AB.
 * Copyright (c) 2013 Guenter Roeck
 *
 * 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/bitops.h>
#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 { lm25056, lm25063, lm25066, lm5064, lm5066, lm5066i };

#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		BIT(4)	/* Current limit */

/* LM25056 only */

#define LM25056_VAUX_OV_WARN_LIMIT	0xe3
#define LM25056_VAUX_UV_WARN_LIMIT	0xe4

#define LM25056_MFR_STS_VAUX_OV_WARN	BIT(1)
#define LM25056_MFR_STS_VAUX_UV_WARN	BIT(0)

/* LM25063 only */

#define LM25063_READ_VOUT_MAX		0xe5
#define LM25063_READ_VOUT_MIN		0xe6

struct __coeff {
	short m, b, R;
};

#define PSC_CURRENT_IN_L	(PSC_NUM_CLASSES)
#define PSC_POWER_L		(PSC_NUM_CLASSES + 1)

static struct __coeff lm25066_coeff[6][PSC_NUM_CLASSES + 2] = {
	[lm25056] = {
		[PSC_VOLTAGE_IN] = {
			.m = 16296,
			.R = -2,
		},
		[PSC_CURRENT_IN] = {
			.m = 13797,
			.R = -2,
		},
		[PSC_CURRENT_IN_L] = {
			.m = 6726,
			.R = -2,
		},
		[PSC_POWER] = {
			.m = 5501,
			.R = -3,
		},
		[PSC_POWER_L] = {
			.m = 26882,
			.R = -4,
		},
		[PSC_TEMPERATURE] = {
			.m = 1580,
			.b = -14500,
			.R = -2,
		},
	},
	[lm25066] = {
		[PSC_VOLTAGE_IN] = {
			.m = 22070,
			.R = -2,
		},
		[PSC_VOLTAGE_OUT] = {
			.m = 22070,
			.R = -2,
		},
		[PSC_CURRENT_IN] = {
			.m = 13661,
			.R = -2,
		},
		[PSC_CURRENT_IN_L] = {
			.m = 6852,
			.R = -2,
		},
		[PSC_POWER] = {
			.m = 736,
			.R = -2,
		},
		[PSC_POWER_L] = {
			.m = 369,
			.R = -2,
		},
		[PSC_TEMPERATURE] = {
			.m = 16,
		},
	},
	[lm25063] = {
		[PSC_VOLTAGE_IN] = {
			.m = 16000,
			.R = -2,
		},
		[PSC_VOLTAGE_OUT] = {
			.m = 16000,
			.R = -2,
		},
		[PSC_CURRENT_IN] = {
			.m = 10000,
			.R = -2,
		},
		[PSC_CURRENT_IN_L] = {
			.m = 10000,
			.R = -2,
		},
		[PSC_POWER] = {
			.m = 5000,
			.R = -3,
		},
		[PSC_POWER_L] = {
			.m = 5000,
			.R = -3,
		},
		[PSC_TEMPERATURE] = {
			.m = 15596,
			.R = -3,
		},
	},
	[lm5064] = {
		[PSC_VOLTAGE_IN] = {
			.m = 4611,
			.R = -2,
		},
		[PSC_VOLTAGE_OUT] = {
			.m = 4621,
			.R = -2,
		},
		[PSC_CURRENT_IN] = {
			.m = 10742,
			.R = -2,
		},
		[PSC_CURRENT_IN_L] = {
			.m = 5456,
			.R = -2,
		},
		[PSC_POWER] = {
			.m = 1204,
			.R = -3,
		},
		[PSC_POWER_L] = {
			.m = 612,
			.R = -3,
		},
		[PSC_TEMPERATURE] = {
			.m = 16,
		},
	},
	[lm5066] = {
		[PSC_VOLTAGE_IN] = {
			.m = 4587,
			.R = -2,
		},
		[PSC_VOLTAGE_OUT] = {
			.m = 4587,
			.R = -2,
		},
		[PSC_CURRENT_IN] = {
			.m = 10753,
			.R = -2,
		},
		[PSC_CURRENT_IN_L] = {
			.m = 5405,
			.R = -2,
		},
		[PSC_POWER] = {
			.m = 1204,
			.R = -3,
		},
		[PSC_POWER_L] = {
			.m = 605,
			.R = -3,
		},
		[PSC_TEMPERATURE] = {
			.m = 16,
		},
	},
	[lm5066i] = {
		[PSC_VOLTAGE_IN] = {
			.m = 4617,
			.b = -140,
			.R = -2,
		},
		[PSC_VOLTAGE_OUT] = {
			.m = 4602,
			.b = 500,
			.R = -2,
		},
		[PSC_CURRENT_IN] = {
			.m = 15076,
			.b = -504,
			.R = -2,
		},
		[PSC_CURRENT_IN_L] = {
			.m = 7645,
			.b = 100,
			.R = -2,
		},
		[PSC_POWER] = {
			.m = 1701,
			.b = -4000,
			.R = -3,
		},
		[PSC_POWER_L] = {
			.m = 861,
			.b = -965,
			.R = -3,
		},
		[PSC_TEMPERATURE] = {
			.m = 16,
		},
	},
};

struct lm25066_data {
	int id;
	u16 rlimit;			/* Maximum register value */
	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;

	switch (reg) {
	case PMBUS_VIRT_READ_VMON:
		ret = pmbus_read_word_data(client, 0, LM25066_READ_VAUX);
		if (ret < 0)
			break;
		/* Adjust returned value to match VIN coefficients */
		switch (data->id) {
		case lm25056:
			/* VIN: 6.14 mV VAUX: 293 uV LSB */
			ret = DIV_ROUND_CLOSEST(ret * 293, 6140);
			break;
		case lm25063:
			/* VIN: 6.25 mV VAUX: 200.0 uV LSB */
			ret = DIV_ROUND_CLOSEST(ret * 20, 625);
			break;
		case lm25066:
			/* VIN: 4.54 mV VAUX: 283.2 uV LSB */
			ret = DIV_ROUND_CLOSEST(ret * 2832, 45400);
			break;
		case lm5064:
			/* VIN: 4.53 mV VAUX: 700 uV LSB */
			ret = DIV_ROUND_CLOSEST(ret * 70, 453);
			break;
		case lm5066:
		case lm5066i:
			/* VIN: 2.18 mV VAUX: 725 uV LSB */
			ret = DIV_ROUND_CLOSEST(ret * 725, 2180);
			break;
		}
		break;
	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;
	}
	return ret;
}

static int lm25063_read_word_data(struct i2c_client *client, int page, int reg)
{
	int ret;

	switch (reg) {
	case PMBUS_VIRT_READ_VOUT_MAX:
		ret = pmbus_read_word_data(client, 0, LM25063_READ_VOUT_MAX);
		break;
	case PMBUS_VIRT_READ_VOUT_MIN:
		ret = pmbus_read_word_data(client, 0, LM25063_READ_VOUT_MIN);
		break;
	default:
		ret = lm25066_read_word_data(client, page, reg);
		break;
	}
	return ret;
}

static int lm25056_read_word_data(struct i2c_client *client, int page, int reg)
{
	int ret;

	switch (reg) {
	case PMBUS_VIRT_VMON_UV_WARN_LIMIT:
		ret = pmbus_read_word_data(client, 0,
					   LM25056_VAUX_UV_WARN_LIMIT);
		if (ret < 0)
			break;
		/* Adjust returned value to match VIN coefficients */
		ret = DIV_ROUND_CLOSEST(ret * 293, 6140);
		break;
	case PMBUS_VIRT_VMON_OV_WARN_LIMIT:
		ret = pmbus_read_word_data(client, 0,
					   LM25056_VAUX_OV_WARN_LIMIT);
		if (ret < 0)
			break;
		/* Adjust returned value to match VIN coefficients */
		ret = DIV_ROUND_CLOSEST(ret * 293, 6140);
		break;
	default:
		ret = lm25066_read_word_data(client, page, reg);
		break;
	}
	return ret;
}

static int lm25056_read_byte_data(struct i2c_client *client, int page, int reg)
{
	int ret, s;

	switch (reg) {
	case PMBUS_VIRT_STATUS_VMON:
		ret = pmbus_read_byte_data(client, 0,
					   PMBUS_STATUS_MFR_SPECIFIC);
		if (ret < 0)
			break;
		s = 0;
		if (ret & LM25056_MFR_STS_VAUX_UV_WARN)
			s |= PB_VOLTAGE_UV_WARNING;
		if (ret & LM25056_MFR_STS_VAUX_OV_WARN)
			s |= PB_VOLTAGE_OV_WARNING;
		ret = s;
		break;
	default:
		ret = -ENODATA;
		break;
	}
	return ret;
}

static int lm25066_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 lm25066_data *data = to_lm25066_data(info);
	int ret;

	switch (reg) {
	case PMBUS_POUT_OP_FAULT_LIMIT:
	case PMBUS_POUT_OP_WARN_LIMIT:
	case PMBUS_VOUT_UV_WARN_LIMIT:
	case PMBUS_OT_FAULT_LIMIT:
	case PMBUS_OT_WARN_LIMIT:
	case PMBUS_IIN_OC_FAULT_LIMIT:
	case PMBUS_VIN_UV_WARN_LIMIT:
	case PMBUS_VIN_UV_FAULT_LIMIT:
	case PMBUS_VIN_OV_FAULT_LIMIT:
	case PMBUS_VIN_OV_WARN_LIMIT:
		word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit);
		ret = pmbus_write_word_data(client, 0, reg, word);
		pmbus_clear_cache(client);
		break;
	case PMBUS_IIN_OC_WARN_LIMIT:
		word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit);
		ret = pmbus_write_word_data(client, 0,
					    LM25066_MFR_IIN_OC_WARN_LIMIT,
					    word);
		pmbus_clear_cache(client);
		break;
	case PMBUS_PIN_OP_WARN_LIMIT:
		word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit);
		ret = pmbus_write_word_data(client, 0,
					    LM25066_MFR_PIN_OP_WARN_LIMIT,
					    word);
		pmbus_clear_cache(client);
		break;
	case PMBUS_VIRT_VMON_UV_WARN_LIMIT:
		/* Adjust from VIN coefficients (for LM25056) */
		word = DIV_ROUND_CLOSEST((int)word * 6140, 293);
		word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit);
		ret = pmbus_write_word_data(client, 0,
					    LM25056_VAUX_UV_WARN_LIMIT, word);
		pmbus_clear_cache(client);
		break;
	case PMBUS_VIRT_VMON_OV_WARN_LIMIT:
		/* Adjust from VIN coefficients (for LM25056) */
		word = DIV_ROUND_CLOSEST((int)word * 6140, 293);
		word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit);
		ret = pmbus_write_word_data(client, 0,
					    LM25056_VAUX_OV_WARN_LIMIT, word);
		pmbus_clear_cache(client);
		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;
	struct lm25066_data *data;
	struct pmbus_driver_info *info;
	struct __coeff *coeff;

	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 = 1;
	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->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VMON
	  | PMBUS_HAVE_PIN | PMBUS_HAVE_IIN | PMBUS_HAVE_STATUS_INPUT
	  | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;

	if (data->id == lm25056) {
		info->func[0] |= PMBUS_HAVE_STATUS_VMON;
		info->read_word_data = lm25056_read_word_data;
		info->read_byte_data = lm25056_read_byte_data;
		data->rlimit = 0x0fff;
	} else if (data->id == lm25063) {
		info->func[0] |= PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
		  | PMBUS_HAVE_POUT;
		info->read_word_data = lm25063_read_word_data;
		data->rlimit = 0xffff;
	} else {
		info->func[0] |= PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
		info->read_word_data = lm25066_read_word_data;
		data->rlimit = 0x0fff;
	}
	info->write_word_data = lm25066_write_word_data;

	coeff = &lm25066_coeff[data->id][0];
	info->m[PSC_TEMPERATURE] = coeff[PSC_TEMPERATURE].m;
	info->b[PSC_TEMPERATURE] = coeff[PSC_TEMPERATURE].b;
	info->R[PSC_TEMPERATURE] = coeff[PSC_TEMPERATURE].R;
	info->m[PSC_VOLTAGE_IN] = coeff[PSC_VOLTAGE_IN].m;
	info->b[PSC_VOLTAGE_IN] = coeff[PSC_VOLTAGE_IN].b;
	info->R[PSC_VOLTAGE_IN] = coeff[PSC_VOLTAGE_IN].R;
	info->m[PSC_VOLTAGE_OUT] = coeff[PSC_VOLTAGE_OUT].m;
	info->b[PSC_VOLTAGE_OUT] = coeff[PSC_VOLTAGE_OUT].b;
	info->R[PSC_VOLTAGE_OUT] = coeff[PSC_VOLTAGE_OUT].R;
	info->R[PSC_CURRENT_IN] = coeff[PSC_CURRENT_IN].R;
	info->R[PSC_POWER] = coeff[PSC_POWER].R;
	if (config & LM25066_DEV_SETUP_CL) {
		info->m[PSC_CURRENT_IN] = coeff[PSC_CURRENT_IN_L].m;
		info->b[PSC_CURRENT_IN] = coeff[PSC_CURRENT_IN_L].b;
		info->m[PSC_POWER] = coeff[PSC_POWER_L].m;
		info->b[PSC_POWER] = coeff[PSC_POWER_L].b;
	} else {
		info->m[PSC_CURRENT_IN] = coeff[PSC_CURRENT_IN].m;
		info->b[PSC_CURRENT_IN] = coeff[PSC_CURRENT_IN].b;
		info->m[PSC_POWER] = coeff[PSC_POWER].m;
		info->b[PSC_POWER] = coeff[PSC_POWER].b;
	}

	return pmbus_do_probe(client, id, info);
}

static const struct i2c_device_id lm25066_id[] = {
	{"lm25056", lm25056},
	{"lm25063", lm25063},
	{"lm25066", lm25066},
	{"lm5064", lm5064},
	{"lm5066", lm5066},
	{"lm5066i", lm5066i},
	{ }
};

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 and compatible chips");
MODULE_LICENSE("GPL");
Commit	Line	Data
03e9bd8d	1	/*
c8ccab7a	2	* Hardware monitoring driver for LM25056 / LM25063 / LM25066 / LM5064 / LM5066
03e9bd8d GR	3	*
03e9bd8d GR	4	* Copyright (c) 2011 Ericsson AB.
a7c69118	5	* Copyright (c) 2013 Guenter Roeck
03e9bd8d GR	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	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	20	*/
	21
2c052d42	22	#include <linux/bitops.h>
03e9bd8d GR	23	#include <linux/kernel.h>
	24	#include <linux/module.h>
	25	#include <linux/init.h>
	26	#include <linux/err.h>
	27	#include <linux/slab.h>
	28	#include <linux/i2c.h>
	29	#include "pmbus.h"
	30
5783ec2e	31	enum chips { lm25056, lm25063, lm25066, lm5064, lm5066, lm5066i };
03e9bd8d GR	32
	33	#define LM25066_READ_VAUX 0xd0
	34	#define LM25066_MFR_READ_IIN 0xd1
	35	#define LM25066_MFR_READ_PIN 0xd2
	36	#define LM25066_MFR_IIN_OC_WARN_LIMIT 0xd3
	37	#define LM25066_MFR_PIN_OP_WARN_LIMIT 0xd4
	38	#define LM25066_READ_PIN_PEAK 0xd5
	39	#define LM25066_CLEAR_PIN_PEAK 0xd6
	40	#define LM25066_DEVICE_SETUP 0xd9
	41	#define LM25066_READ_AVG_VIN 0xdc
	42	#define LM25066_READ_AVG_VOUT 0xdd
	43	#define LM25066_READ_AVG_IIN 0xde
	44	#define LM25066_READ_AVG_PIN 0xdf
	45
2c052d42	46	#define LM25066_DEV_SETUP_CL BIT(4) /* Current limit */
03e9bd8d	47
58615a94 GR	48	/* LM25056 only */
	49
	50	#define LM25056_VAUX_OV_WARN_LIMIT 0xe3
	51	#define LM25056_VAUX_UV_WARN_LIMIT 0xe4
	52
2c052d42 GR	53	#define LM25056_MFR_STS_VAUX_OV_WARN BIT(1)
2c052d42 GR	54	#define LM25056_MFR_STS_VAUX_UV_WARN BIT(0)
58615a94	55
c8ccab7a GR	56	/* LM25063 only */
	57
	58	#define LM25063_READ_VOUT_MAX 0xe5
	59	#define LM25063_READ_VOUT_MIN 0xe6
	60
e53e6497 GR	61	struct __coeff {
	62	short m, b, R;
	63	};
	64
	65	#define PSC_CURRENT_IN_L (PSC_NUM_CLASSES)
	66	#define PSC_POWER_L (PSC_NUM_CLASSES + 1)
	67
5783ec2e	68	static struct __coeff lm25066_coeff[6][PSC_NUM_CLASSES + 2] = {
58615a94 GR	69	[lm25056] = {
	70	[PSC_VOLTAGE_IN] = {
	71	.m = 16296,
	72	.R = -2,
	73	},
	74	[PSC_CURRENT_IN] = {
	75	.m = 13797,
	76	.R = -2,
	77	},
	78	[PSC_CURRENT_IN_L] = {
	79	.m = 6726,
	80	.R = -2,
	81	},
	82	[PSC_POWER] = {
	83	.m = 5501,
	84	.R = -3,
	85	},
	86	[PSC_POWER_L] = {
	87	.m = 26882,
	88	.R = -4,
	89	},
	90	[PSC_TEMPERATURE] = {
	91	.m = 1580,
	92	.b = -14500,
	93	.R = -2,
	94	},
	95	},
e53e6497 GR	96	[lm25066] = {
	97	[PSC_VOLTAGE_IN] = {
	98	.m = 22070,
	99	.R = -2,
	100	},
	101	[PSC_VOLTAGE_OUT] = {
	102	.m = 22070,
	103	.R = -2,
	104	},
	105	[PSC_CURRENT_IN] = {
	106	.m = 13661,
	107	.R = -2,
	108	},
	109	[PSC_CURRENT_IN_L] = {
	110	.m = 6852,
	111	.R = -2,
	112	},
	113	[PSC_POWER] = {
	114	.m = 736,
	115	.R = -2,
	116	},
	117	[PSC_POWER_L] = {
	118	.m = 369,
	119	.R = -2,
	120	},
	121	[PSC_TEMPERATURE] = {
	122	.m = 16,
	123	},
	124	},
c8ccab7a GR	125	[lm25063] = {
	126	[PSC_VOLTAGE_IN] = {
	127	.m = 16000,
	128	.R = -2,
	129	},
	130	[PSC_VOLTAGE_OUT] = {
	131	.m = 16000,
	132	.R = -2,
	133	},
	134	[PSC_CURRENT_IN] = {
	135	.m = 10000,
	136	.R = -2,
	137	},
	138	[PSC_CURRENT_IN_L] = {
	139	.m = 10000,
	140	.R = -2,
	141	},
	142	[PSC_POWER] = {
	143	.m = 5000,
	144	.R = -3,
	145	},
	146	[PSC_POWER_L] = {
	147	.m = 5000,
	148	.R = -3,
	149	},
	150	[PSC_TEMPERATURE] = {
	151	.m = 15596,
	152	.R = -3,
	153	},
	154	},
e53e6497 GR	155	[lm5064] = {
	156	[PSC_VOLTAGE_IN] = {
	157	.m = 4611,
	158	.R = -2,
	159	},
	160	[PSC_VOLTAGE_OUT] = {
	161	.m = 4621,
	162	.R = -2,
	163	},
	164	[PSC_CURRENT_IN] = {
	165	.m = 10742,
	166	.R = -2,
	167	},
	168	[PSC_CURRENT_IN_L] = {
	169	.m = 5456,
	170	.R = -2,
	171	},
	172	[PSC_POWER] = {
	173	.m = 1204,
	174	.R = -3,
	175	},
	176	[PSC_POWER_L] = {
	177	.m = 612,
	178	.R = -3,
	179	},
	180	[PSC_TEMPERATURE] = {
	181	.m = 16,
	182	},
	183	},
	184	[lm5066] = {
	185	[PSC_VOLTAGE_IN] = {
	186	.m = 4587,
	187	.R = -2,
	188	},
	189	[PSC_VOLTAGE_OUT] = {
	190	.m = 4587,
	191	.R = -2,
	192	},
	193	[PSC_CURRENT_IN] = {
	194	.m = 10753,
	195	.R = -2,
	196	},
	197	[PSC_CURRENT_IN_L] = {
	198	.m = 5405,
	199	.R = -2,
	200	},
	201	[PSC_POWER] = {
	202	.m = 1204,
	203	.R = -3,
	204	},
	205	[PSC_POWER_L] = {
	206	.m = 605,
	207	.R = -3,
	208	},
	209	[PSC_TEMPERATURE] = {
	210	.m = 16,
	211	},
	212	},
5783ec2e XW	213	[lm5066i] = {
	214	[PSC_VOLTAGE_IN] = {
	215	.m = 4617,
	216	.b = -140,
	217	.R = -2,
	218	},
	219	[PSC_VOLTAGE_OUT] = {
	220	.m = 4602,
	221	.b = 500,
	222	.R = -2,
	223	},
	224	[PSC_CURRENT_IN] = {
	225	.m = 15076,
	226	.b = -504,
	227	.R = -2,
	228	},
	229	[PSC_CURRENT_IN_L] = {
	230	.m = 7645,
	231	.b = 100,
	232	.R = -2,
	233	},
	234	[PSC_POWER] = {
	235	.m = 1701,
	236	.b = -4000,
	237	.R = -3,
	238	},
	239	[PSC_POWER_L] = {
	240	.m = 861,
	241	.b = -965,
	242	.R = -3,
	243	},
	244	[PSC_TEMPERATURE] = {
	245	.m = 16,
	246	},
	247	},
e53e6497 GR	248	};
e53e6497 GR	249
03e9bd8d GR	250	struct lm25066_data {
03e9bd8d GR	251	int id;
c8ccab7a	252	u16 rlimit; /* Maximum register value */
03e9bd8d GR	253	struct pmbus_driver_info info;
	254	};
	255
	256	#define to_lm25066_data(x) container_of(x, struct lm25066_data, info)
	257
	258	static int lm25066_read_word_data(struct i2c_client *client, int page, int reg)
	259	{
	260	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
	261	const struct lm25066_data *data = to_lm25066_data(info);
	262	int ret;
	263
a7c69118 GR	264	switch (reg) {
	265	case PMBUS_VIRT_READ_VMON:
	266	ret = pmbus_read_word_data(client, 0, LM25066_READ_VAUX);
	267	if (ret < 0)
	268	break;
	269	/* Adjust returned value to match VIN coefficients */
	270	switch (data->id) {
58615a94 GR	271	case lm25056:
	272	/* VIN: 6.14 mV VAUX: 293 uV LSB */
	273	ret = DIV_ROUND_CLOSEST(ret * 293, 6140);
	274	break;
c8ccab7a GR	275	case lm25063:
	276	/* VIN: 6.25 mV VAUX: 200.0 uV LSB */
	277	ret = DIV_ROUND_CLOSEST(ret * 20, 625);
	278	break;
a7c69118 GR	279	case lm25066:
	280	/* VIN: 4.54 mV VAUX: 283.2 uV LSB */
	281	ret = DIV_ROUND_CLOSEST(ret * 2832, 45400);
03e9bd8d	282	break;
a7c69118 GR	283	case lm5064:
	284	/* VIN: 4.53 mV VAUX: 700 uV LSB */
	285	ret = DIV_ROUND_CLOSEST(ret * 70, 453);
	286	break;
	287	case lm5066:
5783ec2e	288	case lm5066i:
a7c69118 GR	289	/* VIN: 2.18 mV VAUX: 725 uV LSB */
a7c69118 GR	290	ret = DIV_ROUND_CLOSEST(ret * 725, 2180);
03e9bd8d GR	291	break;
03e9bd8d GR	292	}
a7c69118	293	break;
03e9bd8d GR	294	case PMBUS_READ_IIN:
	295	ret = pmbus_read_word_data(client, 0, LM25066_MFR_READ_IIN);
	296	break;
	297	case PMBUS_READ_PIN:
	298	ret = pmbus_read_word_data(client, 0, LM25066_MFR_READ_PIN);
	299	break;
	300	case PMBUS_IIN_OC_WARN_LIMIT:
	301	ret = pmbus_read_word_data(client, 0,
	302	LM25066_MFR_IIN_OC_WARN_LIMIT);
	303	break;
	304	case PMBUS_PIN_OP_WARN_LIMIT:
	305	ret = pmbus_read_word_data(client, 0,
	306	LM25066_MFR_PIN_OP_WARN_LIMIT);
	307	break;
	308	case PMBUS_VIRT_READ_VIN_AVG:
	309	ret = pmbus_read_word_data(client, 0, LM25066_READ_AVG_VIN);
	310	break;
	311	case PMBUS_VIRT_READ_VOUT_AVG:
	312	ret = pmbus_read_word_data(client, 0, LM25066_READ_AVG_VOUT);
	313	break;
	314	case PMBUS_VIRT_READ_IIN_AVG:
	315	ret = pmbus_read_word_data(client, 0, LM25066_READ_AVG_IIN);
	316	break;
	317	case PMBUS_VIRT_READ_PIN_AVG:
	318	ret = pmbus_read_word_data(client, 0, LM25066_READ_AVG_PIN);
	319	break;
	320	case PMBUS_VIRT_READ_PIN_MAX:
	321	ret = pmbus_read_word_data(client, 0, LM25066_READ_PIN_PEAK);
	322	break;
	323	case PMBUS_VIRT_RESET_PIN_HISTORY:
	324	ret = 0;
	325	break;
	326	default:
	327	ret = -ENODATA;
	328	break;
	329	}
03e9bd8d GR	330	return ret;
	331	}
	332
c8ccab7a GR	333	static int lm25063_read_word_data(struct i2c_client *client, int page, int reg)
	334	{
	335	int ret;
	336
	337	switch (reg) {
	338	case PMBUS_VIRT_READ_VOUT_MAX:
	339	ret = pmbus_read_word_data(client, 0, LM25063_READ_VOUT_MAX);
	340	break;
	341	case PMBUS_VIRT_READ_VOUT_MIN:
	342	ret = pmbus_read_word_data(client, 0, LM25063_READ_VOUT_MIN);
	343	break;
	344	default:
	345	ret = lm25066_read_word_data(client, page, reg);
	346	break;
	347	}
	348	return ret;
	349	}
	350
58615a94 GR	351	static int lm25056_read_word_data(struct i2c_client *client, int page, int reg)
	352	{
	353	int ret;
	354
	355	switch (reg) {
	356	case PMBUS_VIRT_VMON_UV_WARN_LIMIT:
	357	ret = pmbus_read_word_data(client, 0,
	358	LM25056_VAUX_UV_WARN_LIMIT);
	359	if (ret < 0)
	360	break;
	361	/* Adjust returned value to match VIN coefficients */
	362	ret = DIV_ROUND_CLOSEST(ret * 293, 6140);
	363	break;
	364	case PMBUS_VIRT_VMON_OV_WARN_LIMIT:
	365	ret = pmbus_read_word_data(client, 0,
	366	LM25056_VAUX_OV_WARN_LIMIT);
	367	if (ret < 0)
	368	break;
	369	/* Adjust returned value to match VIN coefficients */
	370	ret = DIV_ROUND_CLOSEST(ret * 293, 6140);
	371	break;
	372	default:
	373	ret = lm25066_read_word_data(client, page, reg);
	374	break;
	375	}
	376	return ret;
	377	}
	378
	379	static int lm25056_read_byte_data(struct i2c_client *client, int page, int reg)
	380	{
	381	int ret, s;
	382
	383	switch (reg) {
	384	case PMBUS_VIRT_STATUS_VMON:
	385	ret = pmbus_read_byte_data(client, 0,
	386	PMBUS_STATUS_MFR_SPECIFIC);
	387	if (ret < 0)
	388	break;
	389	s = 0;
	390	if (ret & LM25056_MFR_STS_VAUX_UV_WARN)
	391	s \|= PB_VOLTAGE_UV_WARNING;
	392	if (ret & LM25056_MFR_STS_VAUX_OV_WARN)
	393	s \|= PB_VOLTAGE_OV_WARNING;
	394	ret = s;
	395	break;
	396	default:
	397	ret = -ENODATA;
	398	break;
	399	}
	400	return ret;
	401	}
	402
03e9bd8d GR	403	static int lm25066_write_word_data(struct i2c_client *client, int page, int reg,
	404	u16 word)
	405	{
c8ccab7a GR	406	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
c8ccab7a GR	407	const struct lm25066_data *data = to_lm25066_data(info);
03e9bd8d GR	408	int ret;
03e9bd8d GR	409
03e9bd8d	410	switch (reg) {
c8ccab7a GR	411	case PMBUS_POUT_OP_FAULT_LIMIT:
c8ccab7a GR	412	case PMBUS_POUT_OP_WARN_LIMIT:
2507abb3 GR	413	case PMBUS_VOUT_UV_WARN_LIMIT:
	414	case PMBUS_OT_FAULT_LIMIT:
	415	case PMBUS_OT_WARN_LIMIT:
c8ccab7a	416	case PMBUS_IIN_OC_FAULT_LIMIT:
2507abb3	417	case PMBUS_VIN_UV_WARN_LIMIT:
c8ccab7a GR	418	case PMBUS_VIN_UV_FAULT_LIMIT:
c8ccab7a GR	419	case PMBUS_VIN_OV_FAULT_LIMIT:
2507abb3	420	case PMBUS_VIN_OV_WARN_LIMIT:
c8ccab7a	421	word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit);
2507abb3 GR	422	ret = pmbus_write_word_data(client, 0, reg, word);
	423	pmbus_clear_cache(client);
	424	break;
03e9bd8d	425	case PMBUS_IIN_OC_WARN_LIMIT:
c8ccab7a	426	word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit);
03e9bd8d GR	427	ret = pmbus_write_word_data(client, 0,
	428	LM25066_MFR_IIN_OC_WARN_LIMIT,
	429	word);
2507abb3	430	pmbus_clear_cache(client);
03e9bd8d GR	431	break;
03e9bd8d GR	432	case PMBUS_PIN_OP_WARN_LIMIT:
c8ccab7a	433	word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit);
03e9bd8d GR	434	ret = pmbus_write_word_data(client, 0,
	435	LM25066_MFR_PIN_OP_WARN_LIMIT,
	436	word);
2507abb3	437	pmbus_clear_cache(client);
03e9bd8d	438	break;
58615a94 GR	439	case PMBUS_VIRT_VMON_UV_WARN_LIMIT:
	440	/* Adjust from VIN coefficients (for LM25056) */
	441	word = DIV_ROUND_CLOSEST((int)word * 6140, 293);
c8ccab7a	442	word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit);
58615a94 GR	443	ret = pmbus_write_word_data(client, 0,
	444	LM25056_VAUX_UV_WARN_LIMIT, word);
	445	pmbus_clear_cache(client);
	446	break;
	447	case PMBUS_VIRT_VMON_OV_WARN_LIMIT:
	448	/* Adjust from VIN coefficients (for LM25056) */
	449	word = DIV_ROUND_CLOSEST((int)word * 6140, 293);
c8ccab7a	450	word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit);
58615a94 GR	451	ret = pmbus_write_word_data(client, 0,
	452	LM25056_VAUX_OV_WARN_LIMIT, word);
	453	pmbus_clear_cache(client);
	454	break;
03e9bd8d GR	455	case PMBUS_VIRT_RESET_PIN_HISTORY:
	456	ret = pmbus_write_byte(client, 0, LM25066_CLEAR_PIN_PEAK);
	457	break;
	458	default:
	459	ret = -ENODATA;
	460	break;
	461	}
	462	return ret;
	463	}
	464
	465	static int lm25066_probe(struct i2c_client *client,
	466	const struct i2c_device_id *id)
	467	{
	468	int config;
03e9bd8d GR	469	struct lm25066_data *data;
03e9bd8d GR	470	struct pmbus_driver_info *info;
e53e6497	471	struct __coeff *coeff;
03e9bd8d GR	472
	473	if (!i2c_check_functionality(client->adapter,
	474	I2C_FUNC_SMBUS_READ_BYTE_DATA))
	475	return -ENODEV;
	476
8b313ca7 GR	477	data = devm_kzalloc(&client->dev, sizeof(struct lm25066_data),
8b313ca7 GR	478	GFP_KERNEL);
03e9bd8d GR	479	if (!data)
	480	return -ENOMEM;
	481
	482	config = i2c_smbus_read_byte_data(client, LM25066_DEVICE_SETUP);
8b313ca7 GR	483	if (config < 0)
8b313ca7 GR	484	return config;
03e9bd8d GR	485
	486	data->id = id->driver_data;
	487	info = &data->info;
	488
a7c69118	489	info->pages = 1;
03e9bd8d GR	490	info->format[PSC_VOLTAGE_IN] = direct;
	491	info->format[PSC_VOLTAGE_OUT] = direct;
	492	info->format[PSC_CURRENT_IN] = direct;
	493	info->format[PSC_TEMPERATURE] = direct;
	494	info->format[PSC_POWER] = direct;
	495
58615a94 GR	496	info->func[0] = PMBUS_HAVE_VIN \| PMBUS_HAVE_VMON
	497	\| PMBUS_HAVE_PIN \| PMBUS_HAVE_IIN \| PMBUS_HAVE_STATUS_INPUT
	498	\| PMBUS_HAVE_TEMP \| PMBUS_HAVE_STATUS_TEMP;
03e9bd8d	499
58615a94 GR	500	if (data->id == lm25056) {
	501	info->func[0] \|= PMBUS_HAVE_STATUS_VMON;
	502	info->read_word_data = lm25056_read_word_data;
	503	info->read_byte_data = lm25056_read_byte_data;
c8ccab7a GR	504	data->rlimit = 0x0fff;
	505	} else if (data->id == lm25063) {
	506	info->func[0] \|= PMBUS_HAVE_VOUT \| PMBUS_HAVE_STATUS_VOUT
	507	\| PMBUS_HAVE_POUT;
	508	info->read_word_data = lm25063_read_word_data;
	509	data->rlimit = 0xffff;
58615a94 GR	510	} else {
	511	info->func[0] \|= PMBUS_HAVE_VOUT \| PMBUS_HAVE_STATUS_VOUT;
	512	info->read_word_data = lm25066_read_word_data;
c8ccab7a	513	data->rlimit = 0x0fff;
58615a94	514	}
03e9bd8d GR	515	info->write_word_data = lm25066_write_word_data;
03e9bd8d GR	516
e53e6497 GR	517	coeff = &lm25066_coeff[data->id][0];
	518	info->m[PSC_TEMPERATURE] = coeff[PSC_TEMPERATURE].m;
	519	info->b[PSC_TEMPERATURE] = coeff[PSC_TEMPERATURE].b;
	520	info->R[PSC_TEMPERATURE] = coeff[PSC_TEMPERATURE].R;
	521	info->m[PSC_VOLTAGE_IN] = coeff[PSC_VOLTAGE_IN].m;
	522	info->b[PSC_VOLTAGE_IN] = coeff[PSC_VOLTAGE_IN].b;
	523	info->R[PSC_VOLTAGE_IN] = coeff[PSC_VOLTAGE_IN].R;
	524	info->m[PSC_VOLTAGE_OUT] = coeff[PSC_VOLTAGE_OUT].m;
	525	info->b[PSC_VOLTAGE_OUT] = coeff[PSC_VOLTAGE_OUT].b;
	526	info->R[PSC_VOLTAGE_OUT] = coeff[PSC_VOLTAGE_OUT].R;
e53e6497	527	info->R[PSC_CURRENT_IN] = coeff[PSC_CURRENT_IN].R;
e53e6497 GR	528	info->R[PSC_POWER] = coeff[PSC_POWER].R;
	529	if (config & LM25066_DEV_SETUP_CL) {
	530	info->m[PSC_CURRENT_IN] = coeff[PSC_CURRENT_IN_L].m;
ee983171	531	info->b[PSC_CURRENT_IN] = coeff[PSC_CURRENT_IN_L].b;
e53e6497	532	info->m[PSC_POWER] = coeff[PSC_POWER_L].m;
ee983171	533	info->b[PSC_POWER] = coeff[PSC_POWER_L].b;
e53e6497 GR	534	} else {
e53e6497 GR	535	info->m[PSC_CURRENT_IN] = coeff[PSC_CURRENT_IN].m;
ee983171	536	info->b[PSC_CURRENT_IN] = coeff[PSC_CURRENT_IN].b;
e53e6497	537	info->m[PSC_POWER] = coeff[PSC_POWER].m;
ee983171	538	info->b[PSC_POWER] = coeff[PSC_POWER].b;
03e9bd8d GR	539	}
03e9bd8d GR	540
8b313ca7	541	return pmbus_do_probe(client, id, info);
03e9bd8d GR	542	}
03e9bd8d GR	543
03e9bd8d	544	static const struct i2c_device_id lm25066_id[] = {
58615a94	545	{"lm25056", lm25056},
c8ccab7a	546	{"lm25063", lm25063},
03e9bd8d GR	547	{"lm25066", lm25066},
	548	{"lm5064", lm5064},
	549	{"lm5066", lm5066},
5783ec2e	550	{"lm5066i", lm5066i},
03e9bd8d GR	551	{ }
	552	};
	553
	554	MODULE_DEVICE_TABLE(i2c, lm25066_id);
	555
	556	/* This is the driver that will be inserted */
	557	static struct i2c_driver lm25066_driver = {
	558	.driver = {
	559	.name = "lm25066",
	560	},
	561	.probe = lm25066_probe,
dd285ad7	562	.remove = pmbus_do_remove,
03e9bd8d GR	563	.id_table = lm25066_id,
	564	};
	565
f0967eea	566	module_i2c_driver(lm25066_driver);
03e9bd8d GR	567
03e9bd8d GR	568	MODULE_AUTHOR("Guenter Roeck");
c8ccab7a	569	MODULE_DESCRIPTION("PMBus driver for LM25066 and compatible chips");
03e9bd8d	570	MODULE_LICENSE("GPL");