mirror of https://gitee.com/openkylin/linux.git
132 lines
3.2 KiB
C
132 lines
3.2 KiB
C
/*
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* Hardware monitoring driver for Analog Devices ADM1275 Hot-Swap Controller
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* and Digital Power Monitor
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*
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* Copyright (c) 2011 Ericsson AB.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include "pmbus.h"
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#define ADM1275_PMON_CONFIG 0xd4
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#define ADM1275_VIN_VOUT_SELECT (1 << 6)
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#define ADM1275_VRANGE (1 << 5)
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static int adm1275_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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int config;
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int ret;
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struct pmbus_driver_info *info;
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if (!i2c_check_functionality(client->adapter,
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I2C_FUNC_SMBUS_READ_BYTE_DATA))
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return -ENODEV;
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info = kzalloc(sizeof(struct pmbus_driver_info), GFP_KERNEL);
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if (!info)
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return -ENOMEM;
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config = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
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if (config < 0) {
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ret = config;
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goto err_mem;
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}
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info->pages = 1;
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info->direct[PSC_VOLTAGE_IN] = true;
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info->direct[PSC_VOLTAGE_OUT] = true;
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info->direct[PSC_CURRENT_OUT] = true;
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info->m[PSC_CURRENT_OUT] = 807;
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info->b[PSC_CURRENT_OUT] = 20475;
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info->R[PSC_CURRENT_OUT] = -1;
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info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT;
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if (config & ADM1275_VRANGE) {
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info->m[PSC_VOLTAGE_IN] = 19199;
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info->b[PSC_VOLTAGE_IN] = 0;
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info->R[PSC_VOLTAGE_IN] = -2;
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info->m[PSC_VOLTAGE_OUT] = 19199;
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info->b[PSC_VOLTAGE_OUT] = 0;
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info->R[PSC_VOLTAGE_OUT] = -2;
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} else {
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info->m[PSC_VOLTAGE_IN] = 6720;
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info->b[PSC_VOLTAGE_IN] = 0;
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info->R[PSC_VOLTAGE_IN] = -1;
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info->m[PSC_VOLTAGE_OUT] = 6720;
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info->b[PSC_VOLTAGE_OUT] = 0;
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info->R[PSC_VOLTAGE_OUT] = -1;
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}
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if (config & ADM1275_VIN_VOUT_SELECT)
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info->func[0] |= PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
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else
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info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
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ret = pmbus_do_probe(client, id, info);
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if (ret)
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goto err_mem;
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return 0;
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err_mem:
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kfree(info);
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return ret;
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}
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static int adm1275_remove(struct i2c_client *client)
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{
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const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
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int ret;
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ret = pmbus_do_remove(client);
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kfree(info);
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return ret;
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}
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static const struct i2c_device_id adm1275_id[] = {
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{"adm1275", 0},
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, adm1275_id);
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static struct i2c_driver adm1275_driver = {
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.driver = {
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.name = "adm1275",
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},
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.probe = adm1275_probe,
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.remove = adm1275_remove,
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.id_table = adm1275_id,
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};
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static int __init adm1275_init(void)
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{
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return i2c_add_driver(&adm1275_driver);
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}
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static void __exit adm1275_exit(void)
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{
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i2c_del_driver(&adm1275_driver);
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}
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MODULE_AUTHOR("Guenter Roeck");
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MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275");
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MODULE_LICENSE("GPL");
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module_init(adm1275_init);
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module_exit(adm1275_exit);
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