[linux-2.6-block.git] / drivers / hwmon / 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 "pmbus.h"

#define ADM1275_PMON_CONFIG		0xd4

#define ADM1275_VIN_VOUT_SELECT		(1 << 6)
#define ADM1275_VRANGE			(1 << 5)

static int adm1275_probe(struct i2c_client *client,
			 const struct i2c_device_id *id)
{
	int config;
	int ret;
	struct pmbus_driver_info *info;

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

	info = kzalloc(sizeof(struct pmbus_driver_info), GFP_KERNEL);
	if (!info)
		return -ENOMEM;

	config = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
	if (config < 0) {
		ret = config;
		goto err_mem;
	}

	info->pages = 1;
	info->direct[PSC_VOLTAGE_IN] = true;
	info->direct[PSC_VOLTAGE_OUT] = true;
	info->direct[PSC_CURRENT_OUT] = true;
	info->m[PSC_CURRENT_OUT] = 807;
	info->b[PSC_CURRENT_OUT] = 20475;
	info->R[PSC_CURRENT_OUT] = -1;
	info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT;

	if (config & ADM1275_VRANGE) {
		info->m[PSC_VOLTAGE_IN] = 19199;
		info->b[PSC_VOLTAGE_IN] = 0;
		info->R[PSC_VOLTAGE_IN] = -2;
		info->m[PSC_VOLTAGE_OUT] = 19199;
		info->b[PSC_VOLTAGE_OUT] = 0;
		info->R[PSC_VOLTAGE_OUT] = -2;
	} else {
		info->m[PSC_VOLTAGE_IN] = 6720;
		info->b[PSC_VOLTAGE_IN] = 0;
		info->R[PSC_VOLTAGE_IN] = -1;
		info->m[PSC_VOLTAGE_OUT] = 6720;
		info->b[PSC_VOLTAGE_OUT] = 0;
		info->R[PSC_VOLTAGE_OUT] = -1;
	}

	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;

	ret = pmbus_do_probe(client, id, info);
	if (ret)
		goto err_mem;
	return 0;

err_mem:
	kfree(info);
	return ret;
}

static int adm1275_remove(struct i2c_client *client)
{
	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
	int ret;

	ret = pmbus_do_remove(client);
	kfree(info);
	return ret;
}

static const struct i2c_device_id adm1275_id[] = {
	{"adm1275", 0},
	{ }
};
MODULE_DEVICE_TABLE(i2c, adm1275_id);

static struct i2c_driver adm1275_driver = {
	.driver = {
		   .name = "adm1275",
		   },
	.probe = adm1275_probe,
	.remove = adm1275_remove,
	.id_table = adm1275_id,
};

static int __init adm1275_init(void)
{
	return i2c_add_driver(&adm1275_driver);
}

static void __exit adm1275_exit(void)
{
	i2c_del_driver(&adm1275_driver);
}

MODULE_AUTHOR("Guenter Roeck");
MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275");
MODULE_LICENSE("GPL");
module_init(adm1275_init);
module_exit(adm1275_exit);
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>
	24	#include "pmbus.h"
	25
	26	#define ADM1275_PMON_CONFIG 0xd4
	27
	28	#define ADM1275_VIN_VOUT_SELECT (1 << 6)
	29	#define ADM1275_VRANGE (1 << 5)
	30
	31	static int adm1275_probe(struct i2c_client *client,
	32	const struct i2c_device_id *id)
	33	{
	34	int config;
3b33ca41	35	int ret;
83f7649c GR	36	struct pmbus_driver_info *info;
	37
	38	if (!i2c_check_functionality(client->adapter,
	39	I2C_FUNC_SMBUS_READ_BYTE_DATA))
	40	return -ENODEV;
	41
	42	info = kzalloc(sizeof(struct pmbus_driver_info), GFP_KERNEL);
	43	if (!info)
	44	return -ENOMEM;
	45
	46	config = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
3b33ca41 GR	47	if (config < 0) {
	48	ret = config;
	49	goto err_mem;
	50	}
83f7649c GR	51
	52	info->pages = 1;
	53	info->direct[PSC_VOLTAGE_IN] = true;
	54	info->direct[PSC_VOLTAGE_OUT] = true;
	55	info->direct[PSC_CURRENT_OUT] = true;
7e97bbba	56	info->m[PSC_CURRENT_OUT] = 807;
83f7649c GR	57	info->b[PSC_CURRENT_OUT] = 20475;
	58	info->R[PSC_CURRENT_OUT] = -1;
	59	info->func[0] = PMBUS_HAVE_IOUT \| PMBUS_HAVE_STATUS_IOUT;
	60
	61	if (config & ADM1275_VRANGE) {
7e97bbba	62	info->m[PSC_VOLTAGE_IN] = 19199;
83f7649c GR	63	info->b[PSC_VOLTAGE_IN] = 0;
83f7649c GR	64	info->R[PSC_VOLTAGE_IN] = -2;
7e97bbba	65	info->m[PSC_VOLTAGE_OUT] = 19199;
83f7649c GR	66	info->b[PSC_VOLTAGE_OUT] = 0;
	67	info->R[PSC_VOLTAGE_OUT] = -2;
	68	} else {
7e97bbba	69	info->m[PSC_VOLTAGE_IN] = 6720;
83f7649c GR	70	info->b[PSC_VOLTAGE_IN] = 0;
83f7649c GR	71	info->R[PSC_VOLTAGE_IN] = -1;
7e97bbba	72	info->m[PSC_VOLTAGE_OUT] = 6720;
83f7649c GR	73	info->b[PSC_VOLTAGE_OUT] = 0;
	74	info->R[PSC_VOLTAGE_OUT] = -1;
	75	}
	76
	77	if (config & ADM1275_VIN_VOUT_SELECT)
	78	info->func[0] \|= PMBUS_HAVE_VOUT \| PMBUS_HAVE_STATUS_VOUT;
	79	else
	80	info->func[0] \|= PMBUS_HAVE_VIN \| PMBUS_HAVE_STATUS_INPUT;
	81
3b33ca41 GR	82	ret = pmbus_do_probe(client, id, info);
	83	if (ret)
	84	goto err_mem;
	85	return 0;
	86
	87	err_mem:
	88	kfree(info);
	89	return ret;
83f7649c GR	90	}
	91
	92	static int adm1275_remove(struct i2c_client *client)
	93	{
	94	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
	95	int ret;
	96
	97	ret = pmbus_do_remove(client);
	98	kfree(info);
	99	return ret;
	100	}
	101
	102	static const struct i2c_device_id adm1275_id[] = {
	103	{"adm1275", 0},
	104	{ }
	105	};
	106	MODULE_DEVICE_TABLE(i2c, adm1275_id);
	107
	108	static struct i2c_driver adm1275_driver = {
	109	.driver = {
	110	.name = "adm1275",
	111	},
	112	.probe = adm1275_probe,
	113	.remove = adm1275_remove,
	114	.id_table = adm1275_id,
	115	};
	116
	117	static int __init adm1275_init(void)
	118	{
	119	return i2c_add_driver(&adm1275_driver);
	120	}
	121
	122	static void __exit adm1275_exit(void)
	123	{
	124	i2c_del_driver(&adm1275_driver);
	125	}
	126
	127	MODULE_AUTHOR("Guenter Roeck");
	128	MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275");
	129	MODULE_LICENSE("GPL");
	130	module_init(adm1275_init);
	131	module_exit(adm1275_exit);