From f20b4a931130cb574c40563cfda0fc2cb944b4df Mon Sep 17 00:00:00 2001 From: Charles Hsu Date: Wed, 31 Jan 2024 15:48:22 +0800 Subject: hwmon: Add driver for MPS MPQ8785 Synchronous Step-Down Converter Add support for mpq8785 device from Monolithic Power Systems, Inc. (MPS) vendor. This is synchronous step-down controller. Signed-off-by: Charles Hsu Link: https://lore.kernel.org/r/20240131074822.2962078-2-ythsu0511@gmail.com [groeck: probe_new --> probe; add MODULE_IMPORT_NS(PMBUS)] Signed-off-by: Guenter Roeck --- drivers/hwmon/pmbus/Kconfig | 9 +++++ drivers/hwmon/pmbus/Makefile | 1 + drivers/hwmon/pmbus/mpq8785.c | 90 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 100 insertions(+) create mode 100644 drivers/hwmon/pmbus/mpq8785.c (limited to 'drivers/hwmon') diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig index 294808f5240a..557ae0c414b0 100644 --- a/drivers/hwmon/pmbus/Kconfig +++ b/drivers/hwmon/pmbus/Kconfig @@ -377,6 +377,15 @@ config SENSORS_MPQ7932 This driver can also be built as a module. If so, the module will be called mpq7932. +config SENSORS_MPQ8785 + tristate "MPS MPQ8785" + help + If you say yes here you get hardware monitoring functionality support + for power management IC MPS MPQ8785. + + This driver can also be built as a module. If so, the module will + be called mpq8785. + config SENSORS_PIM4328 tristate "Flex PIM4328 and compatibles" help diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile index cf8a76744545..f14ecf03ad77 100644 --- a/drivers/hwmon/pmbus/Makefile +++ b/drivers/hwmon/pmbus/Makefile @@ -39,6 +39,7 @@ obj-$(CONFIG_SENSORS_MP2975) += mp2975.o obj-$(CONFIG_SENSORS_MP5023) += mp5023.o obj-$(CONFIG_SENSORS_MP5990) += mp5990.o obj-$(CONFIG_SENSORS_MPQ7932) += mpq7932.o +obj-$(CONFIG_SENSORS_MPQ8785) += mpq8785.o obj-$(CONFIG_SENSORS_PLI1209BC) += pli1209bc.o obj-$(CONFIG_SENSORS_PM6764TR) += pm6764tr.o obj-$(CONFIG_SENSORS_PXE1610) += pxe1610.o diff --git a/drivers/hwmon/pmbus/mpq8785.c b/drivers/hwmon/pmbus/mpq8785.c new file mode 100644 index 000000000000..4e2549cc8120 --- /dev/null +++ b/drivers/hwmon/pmbus/mpq8785.c @@ -0,0 +1,90 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Driver for MPS MPQ8785 Step-Down Converter + */ + +#include +#include +#include +#include "pmbus.h" + +static int mpq8785_identify(struct i2c_client *client, + struct pmbus_driver_info *info) +{ + int vout_mode; + + vout_mode = pmbus_read_byte_data(client, 0, PMBUS_VOUT_MODE); + if (vout_mode < 0 || vout_mode == 0xff) + return vout_mode < 0 ? vout_mode : -ENODEV; + switch (vout_mode >> 5) { + case 0: + info->format[PSC_VOLTAGE_OUT] = linear; + break; + case 1: + case 2: + info->format[PSC_VOLTAGE_OUT] = direct, + info->m[PSC_VOLTAGE_OUT] = 64; + info->b[PSC_VOLTAGE_OUT] = 0; + info->R[PSC_VOLTAGE_OUT] = 1; + break; + default: + return -ENODEV; + } + + return 0; +}; + +static struct pmbus_driver_info mpq8785_info = { + .pages = 1, + .format[PSC_VOLTAGE_IN] = direct, + .format[PSC_CURRENT_OUT] = direct, + .format[PSC_TEMPERATURE] = direct, + .m[PSC_VOLTAGE_IN] = 4, + .b[PSC_VOLTAGE_IN] = 0, + .R[PSC_VOLTAGE_IN] = 1, + .m[PSC_CURRENT_OUT] = 16, + .b[PSC_CURRENT_OUT] = 0, + .R[PSC_CURRENT_OUT] = 0, + .m[PSC_TEMPERATURE] = 1, + .b[PSC_TEMPERATURE] = 0, + .R[PSC_TEMPERATURE] = 0, + .func[0] = + PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT | + PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT | + PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | + PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, + .identify = mpq8785_identify, +}; + +static int mpq8785_probe(struct i2c_client *client) +{ + return pmbus_do_probe(client, &mpq8785_info); +}; + +static const struct i2c_device_id mpq8785_id[] = { + { "mpq8785", 0 }, + { }, +}; +MODULE_DEVICE_TABLE(i2c, mpq8785_id); + +static const struct of_device_id __maybe_unused mpq8785_of_match[] = { + { .compatible = "mps,mpq8785" }, + {} +}; +MODULE_DEVICE_TABLE(of, mpq8785_of_match); + +static struct i2c_driver mpq8785_driver = { + .driver = { + .name = "mpq8785", + .of_match_table = of_match_ptr(mpq8785_of_match), + }, + .probe = mpq8785_probe, + .id_table = mpq8785_id, +}; + +module_i2c_driver(mpq8785_driver); + +MODULE_AUTHOR("Charles Hsu "); +MODULE_DESCRIPTION("PMBus driver for MPS MPQ8785"); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS(PMBUS); -- cgit v1.2.3