lm25066.rar_LM25056_LM25066_LM5066

/* * 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/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 }; #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 (1 << 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 (1 << 1) #define LM25056_MFR_STS_VAUX_UV_WARN (1 << 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[5][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, }, }, }; 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: /* 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;