mirror of https://gitee.com/openkylin/linux.git
352 lines
8.6 KiB
C
352 lines
8.6 KiB
C
/*
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* Hardware monitoring driver for LM25066 / LM5064 / LM5066
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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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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enum chips { lm25066, lm5064, lm5066 };
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#define LM25066_READ_VAUX 0xd0
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#define LM25066_MFR_READ_IIN 0xd1
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#define LM25066_MFR_READ_PIN 0xd2
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#define LM25066_MFR_IIN_OC_WARN_LIMIT 0xd3
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#define LM25066_MFR_PIN_OP_WARN_LIMIT 0xd4
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#define LM25066_READ_PIN_PEAK 0xd5
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#define LM25066_CLEAR_PIN_PEAK 0xd6
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#define LM25066_DEVICE_SETUP 0xd9
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#define LM25066_READ_AVG_VIN 0xdc
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#define LM25066_READ_AVG_VOUT 0xdd
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#define LM25066_READ_AVG_IIN 0xde
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#define LM25066_READ_AVG_PIN 0xdf
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#define LM25066_DEV_SETUP_CL (1 << 4) /* Current limit */
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struct lm25066_data {
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int id;
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struct pmbus_driver_info info;
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};
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#define to_lm25066_data(x) container_of(x, struct lm25066_data, info)
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static int lm25066_read_word_data(struct i2c_client *client, int page, int reg)
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{
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const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
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const struct lm25066_data *data = to_lm25066_data(info);
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int ret;
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if (page > 1)
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return -ENXIO;
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/* Map READ_VAUX into READ_VOUT register on page 1 */
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if (page == 1) {
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switch (reg) {
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case PMBUS_READ_VOUT:
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ret = pmbus_read_word_data(client, 0,
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LM25066_READ_VAUX);
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if (ret < 0)
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break;
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/* Adjust returned value to match VOUT coefficients */
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switch (data->id) {
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case lm25066:
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/* VOUT: 4.54 mV VAUX: 283.2 uV LSB */
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ret = DIV_ROUND_CLOSEST(ret * 2832, 45400);
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break;
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case lm5064:
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/* VOUT: 4.53 mV VAUX: 700 uV LSB */
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ret = DIV_ROUND_CLOSEST(ret * 70, 453);
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break;
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case lm5066:
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/* VOUT: 2.18 mV VAUX: 725 uV LSB */
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ret = DIV_ROUND_CLOSEST(ret * 725, 2180);
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break;
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}
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break;
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default:
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/* No other valid registers on page 1 */
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ret = -ENXIO;
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break;
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}
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goto done;
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}
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switch (reg) {
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case PMBUS_READ_IIN:
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ret = pmbus_read_word_data(client, 0, LM25066_MFR_READ_IIN);
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break;
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case PMBUS_READ_PIN:
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ret = pmbus_read_word_data(client, 0, LM25066_MFR_READ_PIN);
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break;
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case PMBUS_IIN_OC_WARN_LIMIT:
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ret = pmbus_read_word_data(client, 0,
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LM25066_MFR_IIN_OC_WARN_LIMIT);
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break;
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case PMBUS_PIN_OP_WARN_LIMIT:
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ret = pmbus_read_word_data(client, 0,
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LM25066_MFR_PIN_OP_WARN_LIMIT);
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break;
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case PMBUS_VIRT_READ_VIN_AVG:
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ret = pmbus_read_word_data(client, 0, LM25066_READ_AVG_VIN);
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break;
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case PMBUS_VIRT_READ_VOUT_AVG:
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ret = pmbus_read_word_data(client, 0, LM25066_READ_AVG_VOUT);
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break;
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case PMBUS_VIRT_READ_IIN_AVG:
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ret = pmbus_read_word_data(client, 0, LM25066_READ_AVG_IIN);
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break;
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case PMBUS_VIRT_READ_PIN_AVG:
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ret = pmbus_read_word_data(client, 0, LM25066_READ_AVG_PIN);
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break;
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case PMBUS_VIRT_READ_PIN_MAX:
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ret = pmbus_read_word_data(client, 0, LM25066_READ_PIN_PEAK);
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break;
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case PMBUS_VIRT_RESET_PIN_HISTORY:
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ret = 0;
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break;
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default:
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ret = -ENODATA;
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break;
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}
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done:
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return ret;
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}
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static int lm25066_write_word_data(struct i2c_client *client, int page, int reg,
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u16 word)
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{
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int ret;
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if (page > 1)
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return -ENXIO;
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switch (reg) {
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case PMBUS_IIN_OC_WARN_LIMIT:
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ret = pmbus_write_word_data(client, 0,
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LM25066_MFR_IIN_OC_WARN_LIMIT,
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word);
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break;
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case PMBUS_PIN_OP_WARN_LIMIT:
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ret = pmbus_write_word_data(client, 0,
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LM25066_MFR_PIN_OP_WARN_LIMIT,
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word);
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break;
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case PMBUS_VIRT_RESET_PIN_HISTORY:
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ret = pmbus_write_byte(client, 0, LM25066_CLEAR_PIN_PEAK);
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break;
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default:
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ret = -ENODATA;
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break;
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}
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return ret;
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}
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static int lm25066_write_byte(struct i2c_client *client, int page, u8 value)
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{
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if (page > 1)
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return -ENXIO;
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if (page <= 0)
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return pmbus_write_byte(client, page, value);
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return 0;
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}
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static int lm25066_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 lm25066_data *data;
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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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data = kzalloc(sizeof(struct lm25066_data), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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config = i2c_smbus_read_byte_data(client, LM25066_DEVICE_SETUP);
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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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data->id = id->driver_data;
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info = &data->info;
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info->pages = 2;
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info->format[PSC_VOLTAGE_IN] = direct;
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info->format[PSC_VOLTAGE_OUT] = direct;
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info->format[PSC_CURRENT_IN] = direct;
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info->format[PSC_TEMPERATURE] = direct;
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info->format[PSC_POWER] = direct;
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info->m[PSC_TEMPERATURE] = 16;
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info->b[PSC_TEMPERATURE] = 0;
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info->R[PSC_TEMPERATURE] = 0;
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info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT
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| PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_PIN | PMBUS_HAVE_IIN
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| PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
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info->func[1] = PMBUS_HAVE_VOUT;
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info->read_word_data = lm25066_read_word_data;
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info->write_word_data = lm25066_write_word_data;
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info->write_byte = lm25066_write_byte;
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switch (id->driver_data) {
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case lm25066:
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info->m[PSC_VOLTAGE_IN] = 22070;
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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] = 22070;
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info->b[PSC_VOLTAGE_OUT] = 0;
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info->R[PSC_VOLTAGE_OUT] = -2;
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if (config & LM25066_DEV_SETUP_CL) {
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info->m[PSC_CURRENT_IN] = 6852;
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info->b[PSC_CURRENT_IN] = 0;
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info->R[PSC_CURRENT_IN] = -2;
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info->m[PSC_POWER] = 369;
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info->b[PSC_POWER] = 0;
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info->R[PSC_POWER] = -2;
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} else {
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info->m[PSC_CURRENT_IN] = 13661;
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info->b[PSC_CURRENT_IN] = 0;
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info->R[PSC_CURRENT_IN] = -2;
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info->m[PSC_POWER] = 736;
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info->b[PSC_POWER] = 0;
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info->R[PSC_POWER] = -2;
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}
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break;
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case lm5064:
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info->m[PSC_VOLTAGE_IN] = 22075;
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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] = 22075;
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info->b[PSC_VOLTAGE_OUT] = 0;
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info->R[PSC_VOLTAGE_OUT] = -2;
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if (config & LM25066_DEV_SETUP_CL) {
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info->m[PSC_CURRENT_IN] = 6713;
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info->b[PSC_CURRENT_IN] = 0;
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info->R[PSC_CURRENT_IN] = -2;
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info->m[PSC_POWER] = 3619;
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info->b[PSC_POWER] = 0;
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info->R[PSC_POWER] = -3;
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} else {
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info->m[PSC_CURRENT_IN] = 13426;
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info->b[PSC_CURRENT_IN] = 0;
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info->R[PSC_CURRENT_IN] = -2;
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info->m[PSC_POWER] = 7238;
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info->b[PSC_POWER] = 0;
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info->R[PSC_POWER] = -3;
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}
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break;
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case lm5066:
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info->m[PSC_VOLTAGE_IN] = 4587;
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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] = 4587;
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info->b[PSC_VOLTAGE_OUT] = 0;
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info->R[PSC_VOLTAGE_OUT] = -2;
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if (config & LM25066_DEV_SETUP_CL) {
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info->m[PSC_CURRENT_IN] = 10753;
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info->b[PSC_CURRENT_IN] = 0;
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info->R[PSC_CURRENT_IN] = -2;
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info->m[PSC_POWER] = 1204;
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info->b[PSC_POWER] = 0;
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info->R[PSC_POWER] = -3;
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} else {
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info->m[PSC_CURRENT_IN] = 5405;
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info->b[PSC_CURRENT_IN] = 0;
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info->R[PSC_CURRENT_IN] = -2;
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info->m[PSC_POWER] = 605;
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info->b[PSC_POWER] = 0;
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info->R[PSC_POWER] = -3;
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}
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break;
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default:
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ret = -ENODEV;
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goto err_mem;
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}
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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(data);
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return ret;
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}
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static int lm25066_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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const struct lm25066_data *data = to_lm25066_data(info);
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pmbus_do_remove(client);
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kfree(data);
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return 0;
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}
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static const struct i2c_device_id lm25066_id[] = {
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{"lm25066", lm25066},
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{"lm5064", lm5064},
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{"lm5066", lm5066},
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, lm25066_id);
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/* This is the driver that will be inserted */
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static struct i2c_driver lm25066_driver = {
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.driver = {
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.name = "lm25066",
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},
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.probe = lm25066_probe,
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.remove = lm25066_remove,
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.id_table = lm25066_id,
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};
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static int __init lm25066_init(void)
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{
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return i2c_add_driver(&lm25066_driver);
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}
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static void __exit lm25066_exit(void)
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{
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i2c_del_driver(&lm25066_driver);
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}
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MODULE_AUTHOR("Guenter Roeck");
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MODULE_DESCRIPTION("PMBus driver for LM25066/LM5064/LM5066");
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MODULE_LICENSE("GPL");
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module_init(lm25066_init);
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module_exit(lm25066_exit);
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