From dfb231214687bb2089372dba38685a16c186edd6 Mon Sep 17 00:00:00 2001 From: Maxim Sloyko Date: Wed, 10 Apr 2019 08:31:58 -0700 Subject: hwmon: (pmbus/isl68137): Add driver for Intersil ISL68137 PWM Controller Adds the pmbus driver for the Intersil ISL68137 PWM Controller. OpenBMC-Staging-Count: 1 Signed-off-by: Maxim Sloyko Signed-off-by: Robert Lippert Signed-off-by: Patrick Venture Signed-off-by: Joel Stanley --- drivers/hwmon/pmbus/Kconfig | 10 ++ drivers/hwmon/pmbus/Makefile | 1 + drivers/hwmon/pmbus/isl68137.c | 203 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 214 insertions(+) create mode 100644 drivers/hwmon/pmbus/isl68137.c diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig index 629cb45f8557..15c197f1c4c4 100644 --- a/drivers/hwmon/pmbus/Kconfig +++ b/drivers/hwmon/pmbus/Kconfig @@ -54,6 +54,16 @@ config SENSORS_IR35221 This driver can also be built as a module. If so, the module will be called ir35521. +config SENSORS_ISL68137 + tristate "Intersil ISL68137" + default y + help + If you say yes here you get hardware monitoring support for Intersil + ISL68137. + + This driver can also be built as a module. If so, the module will + be called isl68137. + config SENSORS_LM25066 tristate "National Semiconductor LM25066 and compatibles" help diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile index ea0e39518c21..0684b35216da 100644 --- a/drivers/hwmon/pmbus/Makefile +++ b/drivers/hwmon/pmbus/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_SENSORS_PMBUS) += pmbus.o obj-$(CONFIG_SENSORS_ADM1275) += adm1275.o obj-$(CONFIG_SENSORS_IBM_CFFPS) += ibm-cffps.o obj-$(CONFIG_SENSORS_IR35221) += ir35221.o +obj-$(CONFIG_SENSORS_ISL68137) += isl68137.o obj-$(CONFIG_SENSORS_LM25066) += lm25066.o obj-$(CONFIG_SENSORS_LTC2978) += ltc2978.o obj-$(CONFIG_SENSORS_LTC3815) += ltc3815.o diff --git a/drivers/hwmon/pmbus/isl68137.c b/drivers/hwmon/pmbus/isl68137.c new file mode 100644 index 000000000000..ccac14bdb985 --- /dev/null +++ b/drivers/hwmon/pmbus/isl68137.c @@ -0,0 +1,203 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Hardware monitoring driver for Intersil ISL68137 + * + * Copyright (c) 2017 Google Inc + * + * 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 +#include +#include +#include +#include +#include +#include "pmbus.h" + +#define ISL68137_VOUT_AVS 0x30 + +static struct pmbus_driver_info isl68137_info = { + .pages = 2, + .format[PSC_VOLTAGE_IN] = direct, + .format[PSC_VOLTAGE_OUT] = direct, + .format[PSC_CURRENT_IN] = direct, + .format[PSC_CURRENT_OUT] = direct, + .format[PSC_POWER] = direct, + .format[PSC_TEMPERATURE] = direct, + .m[PSC_VOLTAGE_IN] = 1, + .b[PSC_VOLTAGE_IN] = 0, + .R[PSC_VOLTAGE_IN] = 3, + .m[PSC_VOLTAGE_OUT] = 1, + .b[PSC_VOLTAGE_OUT] = 0, + .R[PSC_VOLTAGE_OUT] = 3, + .m[PSC_CURRENT_IN] = 1, + .b[PSC_CURRENT_IN] = 0, + .R[PSC_CURRENT_IN] = 2, + .m[PSC_CURRENT_OUT] = 1, + .b[PSC_CURRENT_OUT] = 0, + .R[PSC_CURRENT_OUT] = 1, + .m[PSC_POWER] = 1, + .b[PSC_POWER] = 0, + .R[PSC_POWER] = 0, + .m[PSC_TEMPERATURE] = 1, + .b[PSC_TEMPERATURE] = 0, + .R[PSC_TEMPERATURE] = 0, + .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN | PMBUS_HAVE_PIN + | PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 + | PMBUS_HAVE_TEMP3 | PMBUS_HAVE_STATUS_TEMP + | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT + | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_POUT, + .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT + | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_POUT, +}; + +static ssize_t isl68137_avs_enable_show_page(struct i2c_client *client, + int page, + char *buf) +{ + int val = pmbus_read_byte_data(client, page, PMBUS_OPERATION); + + return sprintf(buf, "%d\n", + (val & ISL68137_VOUT_AVS) == ISL68137_VOUT_AVS ? 1 : 0); +} + +static ssize_t isl68137_avs_enable_store_page(struct i2c_client *client, + int page, + const char *buf, size_t count) +{ + int rc, op_val; + + if (count < 1) { + rc = -EINVAL; + goto out; + } + + switch (buf[0]) { + case '0': + op_val = 0; + break; + case '1': + op_val = ISL68137_VOUT_AVS; + break; + default: + rc = -EINVAL; + goto out; + } + + /* + * Writes to VOUT setpoint over AVSBus will persist after the VRM is + * switched to PMBus control. Switching back to AVSBus control + * restores this persisted setpoint rather than re-initializing to + * PMBus VOUT_COMMAND. Writing VOUT_COMMAND first over PMBus before + * enabling AVS control is the workaround. + */ + if (op_val == ISL68137_VOUT_AVS) { + int vout_command = pmbus_read_word_data(client, page, + PMBUS_VOUT_COMMAND); + rc = pmbus_write_word_data(client, page, PMBUS_VOUT_COMMAND, + vout_command); + if (rc) + goto out; + } + + rc = pmbus_update_byte_data(client, page, PMBUS_OPERATION, + ISL68137_VOUT_AVS, op_val); + +out: + return rc < 0 ? rc : count; +} + +static ssize_t isl68137_avs_enable_show(struct device *dev, + struct device_attribute *devattr, + char *buf) +{ + struct i2c_client *client = kobj_to_i2c_client(&dev->kobj); + struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); + + return isl68137_avs_enable_show_page(client, attr->index, buf); +} + +static ssize_t isl68137_avs_enable_store(struct device *dev, + struct device_attribute *devattr, + const char *buf, size_t count) +{ + struct i2c_client *client = kobj_to_i2c_client(&dev->kobj); + struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); + + return isl68137_avs_enable_store_page(client, attr->index, buf, count); +} + +static SENSOR_DEVICE_ATTR_2(avs0_enabled, 0644, + isl68137_avs_enable_show, isl68137_avs_enable_store, + 0, 0); +static SENSOR_DEVICE_ATTR_2(avs1_enabled, 0644, + isl68137_avs_enable_show, isl68137_avs_enable_store, + 0, 1); + +static int isl68137_remove(struct i2c_client *client); + +static int isl68137_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int rc; + + rc = pmbus_do_probe(client, id, &isl68137_info); + if (rc) + return rc; + + rc = device_create_file(&client->dev, + &sensor_dev_attr_avs0_enabled.dev_attr); + if (rc) + goto out_fail; + rc = device_create_file(&client->dev, + &sensor_dev_attr_avs1_enabled.dev_attr); + if (rc) + goto out_fail; + + return rc; + +out_fail: + isl68137_remove(client); + return rc; +} + +static int isl68137_remove(struct i2c_client *client) +{ + device_remove_file(&client->dev, + &sensor_dev_attr_avs1_enabled.dev_attr); + device_remove_file(&client->dev, + &sensor_dev_attr_avs0_enabled.dev_attr); + return pmbus_do_remove(client); +} + +static const struct i2c_device_id isl68137_id[] = { + {"isl68137", 0}, + {} +}; + +MODULE_DEVICE_TABLE(i2c, isl68137_id); + +/* This is the driver that will be inserted */ +static struct i2c_driver isl68137_driver = { + .driver = { + .name = "isl68137", + }, + .probe = isl68137_probe, + .remove = isl68137_remove, + .id_table = isl68137_id, +}; + +module_i2c_driver(isl68137_driver); + +MODULE_AUTHOR("Maxim Sloyko "); +MODULE_DESCRIPTION("PMBus driver for Intersil ISL68137"); +MODULE_LICENSE("GPL"); -- cgit v1.2.1