diff options
Diffstat (limited to 'drivers/hwmon/pmbus/max34440.c')
| -rw-r--r-- | drivers/hwmon/pmbus/max34440.c | 313 |
1 files changed, 276 insertions, 37 deletions
diff --git a/drivers/hwmon/pmbus/max34440.c b/drivers/hwmon/pmbus/max34440.c index 74a1f6f68fb3..8ea4e68d4e9d 100644 --- a/drivers/hwmon/pmbus/max34440.c +++ b/drivers/hwmon/pmbus/max34440.c @@ -1,22 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Hardware monitoring driver for Maxim MAX34440/MAX34441 * * Copyright (c) 2011 Ericsson AB. * Copyright (c) 2012 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> @@ -25,9 +12,27 @@ #include <linux/init.h> #include <linux/err.h> #include <linux/i2c.h> +#include <linux/delay.h> #include "pmbus.h" -enum chips { max34440, max34441, max34446, max34460, max34461 }; +enum chips { + adpm12160, + adpm12200, + max34440, + max34441, + max34446, + max34451, + max34460, + max34461, +}; + +/* + * Firmware is sometimes not ready if we try and read the + * data from the page immediately after setting. Maxim + * recommends 50us delay due to the chip failing to clock + * stretch long enough here. + */ +#define MAX34440_PAGE_CHANGE_DELAY 50 #define MAX34440_MFR_VOUT_PEAK 0xd4 #define MAX34440_MFR_IOUT_PEAK 0xd5 @@ -44,59 +49,86 @@ enum chips { max34440, max34441, max34446, max34460, max34461 }; #define MAX34440_STATUS_OT_FAULT BIT(5) #define MAX34440_STATUS_OT_WARN BIT(6) +/* + * The whole max344* family have IOUT_OC_WARN_LIMIT and IOUT_OC_FAULT_LIMIT + * swapped from the standard pmbus spec addresses. + * For max34451, version MAX34451ETNA6+ and later has this issue fixed. + */ +#define MAX34440_IOUT_OC_WARN_LIMIT 0x46 +#define MAX34440_IOUT_OC_FAULT_LIMIT 0x4A + +#define MAX34451ETNA6_MFR_REV 0x0012 + +#define MAX34451_MFR_CHANNEL_CONFIG 0xe4 +#define MAX34451_MFR_CHANNEL_CONFIG_SEL_MASK 0x3f + struct max34440_data { int id; struct pmbus_driver_info info; + u8 iout_oc_warn_limit; + u8 iout_oc_fault_limit; }; #define to_max34440_data(x) container_of(x, struct max34440_data, info) -static int max34440_read_word_data(struct i2c_client *client, int page, int reg) +static const struct i2c_device_id max34440_id[]; + +static int max34440_read_word_data(struct i2c_client *client, int page, + int phase, int reg) { int ret; const struct pmbus_driver_info *info = pmbus_get_driver_info(client); const struct max34440_data *data = to_max34440_data(info); switch (reg) { + case PMBUS_IOUT_OC_FAULT_LIMIT: + ret = pmbus_read_word_data(client, page, phase, + data->iout_oc_fault_limit); + break; + case PMBUS_IOUT_OC_WARN_LIMIT: + ret = pmbus_read_word_data(client, page, phase, + data->iout_oc_warn_limit); + break; case PMBUS_VIRT_READ_VOUT_MIN: - ret = pmbus_read_word_data(client, page, + ret = pmbus_read_word_data(client, page, phase, MAX34440_MFR_VOUT_MIN); break; case PMBUS_VIRT_READ_VOUT_MAX: - ret = pmbus_read_word_data(client, page, + ret = pmbus_read_word_data(client, page, phase, MAX34440_MFR_VOUT_PEAK); break; case PMBUS_VIRT_READ_IOUT_AVG: - if (data->id != max34446) + if (data->id != max34446 && data->id != max34451 && + data->id != adpm12160 && data->id != adpm12200) return -ENXIO; - ret = pmbus_read_word_data(client, page, + ret = pmbus_read_word_data(client, page, phase, MAX34446_MFR_IOUT_AVG); break; case PMBUS_VIRT_READ_IOUT_MAX: - ret = pmbus_read_word_data(client, page, + ret = pmbus_read_word_data(client, page, phase, MAX34440_MFR_IOUT_PEAK); break; case PMBUS_VIRT_READ_POUT_AVG: if (data->id != max34446) return -ENXIO; - ret = pmbus_read_word_data(client, page, + ret = pmbus_read_word_data(client, page, phase, MAX34446_MFR_POUT_AVG); break; case PMBUS_VIRT_READ_POUT_MAX: if (data->id != max34446) return -ENXIO; - ret = pmbus_read_word_data(client, page, + ret = pmbus_read_word_data(client, page, phase, MAX34446_MFR_POUT_PEAK); break; case PMBUS_VIRT_READ_TEMP_AVG: if (data->id != max34446 && data->id != max34460 && data->id != max34461) return -ENXIO; - ret = pmbus_read_word_data(client, page, + ret = pmbus_read_word_data(client, page, phase, MAX34446_MFR_TEMPERATURE_AVG); break; case PMBUS_VIRT_READ_TEMP_MAX: - ret = pmbus_read_word_data(client, page, + ret = pmbus_read_word_data(client, page, phase, MAX34440_MFR_TEMPERATURE_PEAK); break; case PMBUS_VIRT_RESET_POUT_HISTORY: @@ -124,6 +156,14 @@ static int max34440_write_word_data(struct i2c_client *client, int page, int ret; switch (reg) { + case PMBUS_IOUT_OC_FAULT_LIMIT: + ret = pmbus_write_word_data(client, page, data->iout_oc_fault_limit, + word); + break; + case PMBUS_IOUT_OC_WARN_LIMIT: + ret = pmbus_write_word_data(client, page, data->iout_oc_warn_limit, + word); + break; case PMBUS_VIRT_RESET_POUT_HISTORY: ret = pmbus_write_word_data(client, page, MAX34446_MFR_POUT_PEAK, 0); @@ -143,7 +183,8 @@ static int max34440_write_word_data(struct i2c_client *client, int page, case PMBUS_VIRT_RESET_IOUT_HISTORY: ret = pmbus_write_word_data(client, page, MAX34440_MFR_IOUT_PEAK, 0); - if (!ret && data->id == max34446) + if (!ret && (data->id == max34446 || data->id == max34451 || + data->id == adpm12160 || data->id == adpm12200)) ret = pmbus_write_word_data(client, page, MAX34446_MFR_IOUT_AVG, 0); @@ -169,14 +210,14 @@ static int max34440_read_byte_data(struct i2c_client *client, int page, int reg) int mfg_status; if (page >= 0) { - ret = pmbus_set_page(client, page); + ret = pmbus_set_page(client, page, 0xff); if (ret < 0) return ret; } switch (reg) { case PMBUS_STATUS_IOUT: - mfg_status = pmbus_read_word_data(client, 0, + mfg_status = pmbus_read_word_data(client, 0, 0xff, PMBUS_STATUS_MFR_SPECIFIC); if (mfg_status < 0) return mfg_status; @@ -186,7 +227,7 @@ static int max34440_read_byte_data(struct i2c_client *client, int page, int reg) ret |= PB_IOUT_OC_FAULT; break; case PMBUS_STATUS_TEMPERATURE: - mfg_status = pmbus_read_word_data(client, 0, + mfg_status = pmbus_read_word_data(client, 0, 0xff, PMBUS_STATUS_MFR_SPECIFIC); if (mfg_status < 0) return mfg_status; @@ -202,7 +243,164 @@ static int max34440_read_byte_data(struct i2c_client *client, int page, int reg) return ret; } +static int max34451_set_supported_funcs(struct i2c_client *client, + struct max34440_data *data) +{ + /* + * Each of the channel 0-15 can be configured to monitor the following + * functions based on MFR_CHANNEL_CONFIG[5:0] + * 0x10: Sequencing + voltage monitoring (only valid for PAGES 0–11) + * 0x20: Voltage monitoring (no sequencing) + * 0x21: Voltage read only + * 0x22: Current monitoring + * 0x23: Current read only + * 0x30: General-purpose input active low + * 0x34: General-purpose input active high + * 0x00: Disabled + */ + + int page, rv; + bool max34451_na6 = false; + + rv = i2c_smbus_read_word_data(client, PMBUS_MFR_REVISION); + if (rv < 0) + return rv; + + if (rv >= MAX34451ETNA6_MFR_REV) { + max34451_na6 = true; + data->info.format[PSC_VOLTAGE_IN] = direct; + data->info.format[PSC_CURRENT_IN] = direct; + data->info.m[PSC_VOLTAGE_IN] = 1; + data->info.b[PSC_VOLTAGE_IN] = 0; + data->info.R[PSC_VOLTAGE_IN] = 3; + data->info.m[PSC_CURRENT_IN] = 1; + data->info.b[PSC_CURRENT_IN] = 0; + data->info.R[PSC_CURRENT_IN] = 2; + data->iout_oc_fault_limit = PMBUS_IOUT_OC_FAULT_LIMIT; + data->iout_oc_warn_limit = PMBUS_IOUT_OC_WARN_LIMIT; + } + + for (page = 0; page < 16; page++) { + rv = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page); + fsleep(MAX34440_PAGE_CHANGE_DELAY); + if (rv < 0) + return rv; + + rv = i2c_smbus_read_word_data(client, + MAX34451_MFR_CHANNEL_CONFIG); + if (rv < 0) + return rv; + + switch (rv & MAX34451_MFR_CHANNEL_CONFIG_SEL_MASK) { + case 0x10: + case 0x20: + data->info.func[page] = PMBUS_HAVE_VOUT | + PMBUS_HAVE_STATUS_VOUT; + + if (max34451_na6) + data->info.func[page] |= PMBUS_HAVE_VIN | + PMBUS_HAVE_STATUS_INPUT; + break; + case 0x21: + data->info.func[page] = PMBUS_HAVE_VOUT; + + if (max34451_na6) + data->info.func[page] |= PMBUS_HAVE_VIN; + break; + case 0x22: + data->info.func[page] = PMBUS_HAVE_IOUT | + PMBUS_HAVE_STATUS_IOUT; + + if (max34451_na6) + data->info.func[page] |= PMBUS_HAVE_IIN | + PMBUS_HAVE_STATUS_INPUT; + break; + case 0x23: + data->info.func[page] = PMBUS_HAVE_IOUT; + + if (max34451_na6) + data->info.func[page] |= PMBUS_HAVE_IIN; + break; + default: + break; + } + } + + return 0; +} + static struct pmbus_driver_info max34440_info[] = { + [adpm12160] = { + .pages = 19, + .format[PSC_VOLTAGE_IN] = direct, + .format[PSC_VOLTAGE_OUT] = direct, + .format[PSC_CURRENT_IN] = direct, + .format[PSC_CURRENT_OUT] = direct, + .format[PSC_TEMPERATURE] = direct, + .m[PSC_VOLTAGE_IN] = 125, + .b[PSC_VOLTAGE_IN] = 0, + .R[PSC_VOLTAGE_IN] = 0, + .m[PSC_VOLTAGE_OUT] = 125, + .b[PSC_VOLTAGE_OUT] = 0, + .R[PSC_VOLTAGE_OUT] = 0, + .m[PSC_CURRENT_IN] = 250, + .b[PSC_CURRENT_IN] = 0, + .R[PSC_CURRENT_IN] = -1, + .m[PSC_CURRENT_OUT] = 250, + .b[PSC_CURRENT_OUT] = 0, + .R[PSC_CURRENT_OUT] = -1, + .m[PSC_TEMPERATURE] = 1, + .b[PSC_TEMPERATURE] = 0, + .R[PSC_TEMPERATURE] = 2, + /* absent func below [18] are not for monitoring */ + .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, + .func[4] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, + .func[5] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, + .func[6] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, + .func[7] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, + .func[8] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, + .func[9] = PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT, + .func[10] = PMBUS_HAVE_IIN | PMBUS_HAVE_STATUS_INPUT, + .func[18] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, + .read_word_data = max34440_read_word_data, + .write_word_data = max34440_write_word_data, + }, + [adpm12200] = { + .pages = 19, + .format[PSC_VOLTAGE_IN] = direct, + .format[PSC_VOLTAGE_OUT] = direct, + .format[PSC_CURRENT_IN] = direct, + .format[PSC_CURRENT_OUT] = direct, + .format[PSC_TEMPERATURE] = direct, + .m[PSC_VOLTAGE_IN] = 125, + .b[PSC_VOLTAGE_IN] = 0, + .R[PSC_VOLTAGE_IN] = 0, + .m[PSC_VOLTAGE_OUT] = 125, + .b[PSC_VOLTAGE_OUT] = 0, + .R[PSC_VOLTAGE_OUT] = 0, + .m[PSC_CURRENT_IN] = 250, + .b[PSC_CURRENT_IN] = 0, + .R[PSC_CURRENT_IN] = -1, + .m[PSC_CURRENT_OUT] = 250, + .b[PSC_CURRENT_OUT] = 0, + .R[PSC_CURRENT_OUT] = -1, + .m[PSC_TEMPERATURE] = 1, + .b[PSC_TEMPERATURE] = 0, + .R[PSC_TEMPERATURE] = 2, + /* absent func below [18] are not for monitoring */ + .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, + .func[4] = PMBUS_HAVE_STATUS_IOUT, + .func[5] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, + .func[6] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, + .func[7] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, + .func[8] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, + .func[9] = PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT, + .func[10] = PMBUS_HAVE_IIN | PMBUS_HAVE_STATUS_INPUT, + .func[14] = PMBUS_HAVE_IOUT, + .func[18] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, + .read_word_data = max34440_read_word_data, + .write_word_data = max34440_write_word_data, + }, [max34440] = { .pages = 14, .format[PSC_VOLTAGE_IN] = direct, @@ -244,6 +442,7 @@ static struct pmbus_driver_info max34440_info[] = { .read_byte_data = max34440_read_byte_data, .read_word_data = max34440_read_word_data, .write_word_data = max34440_write_word_data, + .page_change_delay = MAX34440_PAGE_CHANGE_DELAY, }, [max34441] = { .pages = 12, @@ -287,6 +486,7 @@ static struct pmbus_driver_info max34440_info[] = { .read_byte_data = max34440_read_byte_data, .read_word_data = max34440_read_word_data, .write_word_data = max34440_write_word_data, + .page_change_delay = MAX34440_PAGE_CHANGE_DELAY, }, [max34446] = { .pages = 7, @@ -324,6 +524,31 @@ static struct pmbus_driver_info max34440_info[] = { .read_byte_data = max34440_read_byte_data, .read_word_data = max34440_read_word_data, .write_word_data = max34440_write_word_data, + .page_change_delay = MAX34440_PAGE_CHANGE_DELAY, + }, + [max34451] = { + .pages = 21, + .format[PSC_VOLTAGE_OUT] = direct, + .format[PSC_TEMPERATURE] = direct, + .format[PSC_CURRENT_OUT] = direct, + .m[PSC_VOLTAGE_OUT] = 1, + .b[PSC_VOLTAGE_OUT] = 0, + .R[PSC_VOLTAGE_OUT] = 3, + .m[PSC_CURRENT_OUT] = 1, + .b[PSC_CURRENT_OUT] = 0, + .R[PSC_CURRENT_OUT] = 2, + .m[PSC_TEMPERATURE] = 1, + .b[PSC_TEMPERATURE] = 0, + .R[PSC_TEMPERATURE] = 2, + /* func 0-15 is set dynamically before probing */ + .func[16] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, + .func[17] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, + .func[18] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, + .func[19] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, + .func[20] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, + .read_word_data = max34440_read_word_data, + .write_word_data = max34440_write_word_data, + .page_change_delay = MAX34440_PAGE_CHANGE_DELAY, }, [max34460] = { .pages = 18, @@ -352,9 +577,9 @@ static struct pmbus_driver_info max34440_info[] = { .func[15] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, .func[16] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, .func[17] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, - .read_byte_data = max34440_read_byte_data, .read_word_data = max34440_read_word_data, .write_word_data = max34440_write_word_data, + .page_change_delay = MAX34440_PAGE_CHANGE_DELAY, }, [max34461] = { .pages = 23, @@ -388,31 +613,45 @@ static struct pmbus_driver_info max34440_info[] = { .func[19] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, .func[20] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, .func[21] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, - .read_byte_data = max34440_read_byte_data, .read_word_data = max34440_read_word_data, .write_word_data = max34440_write_word_data, + .page_change_delay = MAX34440_PAGE_CHANGE_DELAY, }, }; -static int max34440_probe(struct i2c_client *client, - const struct i2c_device_id *id) +static int max34440_probe(struct i2c_client *client) { struct max34440_data *data; + int rv; data = devm_kzalloc(&client->dev, sizeof(struct max34440_data), GFP_KERNEL); if (!data) return -ENOMEM; - data->id = id->driver_data; - data->info = max34440_info[id->driver_data]; + data->id = i2c_match_id(max34440_id, client)->driver_data; + data->info = max34440_info[data->id]; + data->iout_oc_fault_limit = MAX34440_IOUT_OC_FAULT_LIMIT; + data->iout_oc_warn_limit = MAX34440_IOUT_OC_WARN_LIMIT; + + if (data->id == max34451) { + rv = max34451_set_supported_funcs(client, data); + if (rv) + return rv; + } else if (data->id == adpm12160 || data->id == adpm12200) { + data->iout_oc_fault_limit = PMBUS_IOUT_OC_FAULT_LIMIT; + data->iout_oc_warn_limit = PMBUS_IOUT_OC_WARN_LIMIT; + } - return pmbus_do_probe(client, id, &data->info); + return pmbus_do_probe(client, &data->info); } static const struct i2c_device_id max34440_id[] = { + {"adpm12160", adpm12160}, + {"adpm12200", adpm12200}, {"max34440", max34440}, {"max34441", max34441}, {"max34446", max34446}, + {"max34451", max34451}, {"max34460", max34460}, {"max34461", max34461}, {} @@ -425,7 +664,6 @@ static struct i2c_driver max34440_driver = { .name = "max34440", }, .probe = max34440_probe, - .remove = pmbus_do_remove, .id_table = max34440_id, }; @@ -434,3 +672,4 @@ module_i2c_driver(max34440_driver); MODULE_AUTHOR("Guenter Roeck"); MODULE_DESCRIPTION("PMBus driver for Maxim MAX34440/MAX34441"); MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS("PMBUS"); |