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([2a04:ee41:82:7577:80f9:d6dd:93b5:e2ef]) by smtp.googlemail.com with ESMTPSA id 4fb4d7f45d1cf-6507bf65ca0sm2474912a12.24.2026.01.06.08.03.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 Jan 2026 08:03:58 -0800 (PST) From: Vasileios Amoiridis To: robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, linux@roeck-us.net Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-doc@vger.kernel.org, Vasileios Amoiridis Subject: [PATCH v1 2/2] hwmon: Add support for HiTRON HAC300S PSU Date: Tue, 6 Jan 2026 17:03:53 +0100 Message-ID: <20260106160353.14023-3-vassilisamir@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260106160353.14023-1-vassilisamir@gmail.com> References: <20260106160353.14023-1-vassilisamir@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Vasileios Amoiridis Add Support for HiTRON HAC300S PSU. This is a AC/DC hot-swappable CompactPCI Serial Dual output active current sharing switching power supply with a 312W rating. Signed-off-by: Vasileios Amoiridis --- Documentation/hwmon/hac300s.rst | 37 ++++++++ MAINTAINERS | 7 ++ drivers/hwmon/pmbus/Kconfig | 9 ++ drivers/hwmon/pmbus/Makefile | 1 + drivers/hwmon/pmbus/hac300s.c | 152 ++++++++++++++++++++++++++++++++ 5 files changed, 206 insertions(+) create mode 100644 Documentation/hwmon/hac300s.rst create mode 100644 drivers/hwmon/pmbus/hac300s.c diff --git a/Documentation/hwmon/hac300s.rst b/Documentation/hwmon/hac300s.= rst new file mode 100644 index 000000000000..573269fc81f8 --- /dev/null +++ b/Documentation/hwmon/hac300s.rst @@ -0,0 +1,37 @@ +.. SPDX-License-Identifier: GPL-2.0 + +Kernel driver hac300s +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D + +Supported chips: + + * HiTRON HAC300S + + Prefix: 'hac300s' + + Datasheet: Publicly available at HiTRON website. + +Author: + + - Vasileios Amoiridis + +Description +----------- + +This driver implements support for the HiTRON HAC300S PSU. It is a Univers= al +AC input harmonic correction AC-DC hot-swappable CompactPCI Serial Dual ou= tput +(with 5V standby) 312 Watts active current sharing switching power supply. + +The device has an input of 90-264VAC and 2 nominal output voltaged at 12V = and +5V which they can supplu up to 25A and 2.5A respectively. + +Sysfs entries +------------- + +=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D +curr1 Output current +in1 Output voltage +power1 Output power +temp1 Ambient temperature inside the module +temp2 Internal secondary component's temperature +=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D diff --git a/MAINTAINERS b/MAINTAINERS index a0dd762f5648..feb8ec4d9b17 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11254,6 +11254,13 @@ F: kernel/time/timer_list.c F: kernel/time/timer_migration.* F: tools/testing/selftests/timers/ =20 +HITRON HAC300S PSU DRIVER +M: Vasileios Amoiridis +L: linux-hwmon@vger.kernel.org +S: Maintained +F: Documentation/hwmon/hac300s.rst +F: drivers/hwmon/pmbus/hac300s.c + DELAY, SLEEP, TIMEKEEPING, TIMERS [RUST] M: Andreas Hindborg R: Boqun Feng diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig index f3fb94cebf1a..4c2cb51dbe3f 100644 --- a/drivers/hwmon/pmbus/Kconfig +++ b/drivers/hwmon/pmbus/Kconfig @@ -124,6 +124,15 @@ config SENSORS_FSP_3Y This driver can also be built as a module. If so, the module will be called fsp-3y. =20 +config SENSORS_HAC300S + tristate "Hitron HAC300S-D120E PSU" + help + If you say yes here you get hardware monitoring support for the + Hitron HAC300S-D120E Power Supply. + + This driver can also be built as a module. If so, the module will + be called hac300s. + config SENSORS_IBM_CFFPS tristate "IBM Common Form Factor Power Supply" depends on LEDS_CLASS diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile index 349a89b6d92e..b92309019d35 100644 --- a/drivers/hwmon/pmbus/Makefile +++ b/drivers/hwmon/pmbus/Makefile @@ -13,6 +13,7 @@ obj-$(CONFIG_SENSORS_BEL_PFE) +=3D bel-pfe.o obj-$(CONFIG_SENSORS_BPA_RS600) +=3D bpa-rs600.o obj-$(CONFIG_SENSORS_DELTA_AHE50DC_FAN) +=3D delta-ahe50dc-fan.o obj-$(CONFIG_SENSORS_FSP_3Y) +=3D fsp-3y.o +obj-$(CONFIG_SENSORS_HAC300S) +=3D hac300s.o obj-$(CONFIG_SENSORS_IBM_CFFPS) +=3D ibm-cffps.o obj-$(CONFIG_SENSORS_DPS920AB) +=3D dps920ab.o obj-$(CONFIG_SENSORS_INA233) +=3D ina233.o diff --git a/drivers/hwmon/pmbus/hac300s.c b/drivers/hwmon/pmbus/hac300s.c new file mode 100644 index 000000000000..a1640449e5f5 --- /dev/null +++ b/drivers/hwmon/pmbus/hac300s.c @@ -0,0 +1,152 @@ +// SPDX-License-Identifier: GPL-2.0-only +// SPDX-FileCopyrightText: 2024 CERN (home.cern) +/* + * Hardware monitoring driver for Hi-Tron HAC300S PSU. + * + * NOTE: The HAC300S device does not support the PMBUS_VOUT_MODE register. + * On top of that, it returns the Voltage output values in Linear11 which = is + * not adhering to the PMBus specifications. (PMBus Specification Part II, + * Section 7.1-7.3). For that reason the PMBUS_VOUT_MODE register is being= faked + * and returns the exponent value of the READ_VOUT register. The exponent = part + * of the VOUT_* registers is being cleared in order to return the mantiss= a to + * the pmbus core. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "pmbus.h" + +#define LINEAR11_EXPONENT_MASK GENMASK(15, 11) +#define LINEAR11_MANTISSA_MASK GENMASK(10, 0) + +#define to_hac300s_data(x) container_of(x, struct hac300s_data, info) + +struct hac300s_data { + struct pmbus_driver_info info; + bool vout_linear11; + s8 exponent; +}; + +static int hac300s_read_byte_data(struct i2c_client *client, int page, int= reg) +{ + const struct pmbus_driver_info *info =3D pmbus_get_driver_info(client); + struct hac300s_data *data =3D to_hac300s_data(info); + + if (reg =3D=3D PMBUS_VOUT_MODE && data->vout_linear11) + return data->exponent; + + return pmbus_read_byte_data(client, page, reg); +} + +static int hac300s_read_word_data(struct i2c_client *client, int page, + int phase, int reg) +{ + const struct pmbus_driver_info *info =3D pmbus_get_driver_info(client); + struct hac300s_data *data =3D to_hac300s_data(info); + int rv; + + rv =3D pmbus_read_word_data(client, page, phase, reg); + if (rv < 0) + return rv; + + switch (reg) { + case PMBUS_VIRT_READ_IOUT_AVG: + case PMBUS_VIRT_READ_POUT_AVG: + case PMBUS_VIRT_READ_TEMP_AVG: + return -ENXIO; + case PMBUS_VOUT_OV_WARN_LIMIT: + case PMBUS_VOUT_UV_WARN_LIMIT: + case PMBUS_VOUT_OV_FAULT_LIMIT: + case PMBUS_VOUT_UV_FAULT_LIMIT: + case PMBUS_MFR_VOUT_MAX: + case PMBUS_MFR_VOUT_MIN: + case PMBUS_READ_VOUT: + if (data->vout_linear11) + return FIELD_GET(LINEAR11_MANTISSA_MASK, rv); + fallthrough; + default: + return rv; + } +} + +#define HAC300S_SW_FUNC (PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 | \ + PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT | \ + PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | \ + PMBUS_HAVE_POUT | PMBUS_HAVE_STATUS_TEMP) + +static struct pmbus_driver_info hac300s_info =3D { + .pages =3D 1, + .func[0] =3D HAC300S_SW_FUNC, + .read_byte_data =3D hac300s_read_byte_data, + .read_word_data =3D hac300s_read_word_data, + .format[PSC_VOLTAGE_OUT] =3D linear, +}; + +static struct pmbus_platform_data hac300s_pdata =3D { + .flags =3D PMBUS_NO_CAPABILITY, +}; + +static int hac300s_probe(struct i2c_client *client) +{ + struct hac300s_data *data; + int rv; + + data =3D devm_kzalloc(&client->dev, sizeof(struct hac300s_data), GFP_KERN= EL); + if (!data) + return -ENOMEM; + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_READ_BYTE_DATA | + I2C_FUNC_SMBUS_READ_WORD_DATA)) + return -ENODEV; + + rv =3D i2c_smbus_read_byte_data(client, PMBUS_VOUT_MODE); + if (rv < 0) { + data->vout_linear11 =3D true; + /* LINEAR11 format, use exponent from READ_VOUT register */ + rv =3D i2c_smbus_read_word_data(client, PMBUS_READ_VOUT); + if (rv < 0) + return dev_err_probe(&client->dev, rv, "Failed to read vout_mode\n"); + + data->exponent =3D FIELD_GET(LINEAR11_EXPONENT_MASK, rv); + } + + data->info =3D hac300s_info; + client->dev.platform_data =3D &hac300s_pdata; + return pmbus_do_probe(client, &data->info); +} + +static const struct of_device_id hac300s_of_match[] =3D { + { .compatible =3D "hitron,hac300s" }, + {} +}; +MODULE_DEVICE_TABLE(of, hac300s_of_match); + +static const struct i2c_device_id hac300s_id[] =3D { + {"hac300s", 0}, + {} +}; +MODULE_DEVICE_TABLE(i2c, hac300s_id); + +static struct i2c_driver hac300s_driver =3D { + .driver =3D { + .name =3D "hac300s", + .of_match_table =3D hac300s_of_match, + }, + .probe =3D hac300s_probe, + .id_table =3D hac300s_id, + +}; +module_i2c_driver(hac300s_driver); + +MODULE_AUTHOR("Vasileios Amoiridis"); +MODULE_DESCRIPTION("PMBus driver for Hi-Tron HAC300S PSU"); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS("PMBUS"); --=20 2.47.3