From nobody Wed Apr 1 10:28:59 2026 Received: from gate2.alliedtelesis.co.nz (gate2.alliedtelesis.co.nz [202.36.163.20]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C054736EA9F for ; Wed, 1 Apr 2026 02:43:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=202.36.163.20 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775011401; cv=none; b=bfJIcTU04+m85xDCSY01R9AZLPpAGsLgXdUxP/IxJkjHRaAZLfiZJ8d3Hrc3xtDOXsIBG8+lRcj4Uc790hD1x+lBJlEq0wgIe5KeYsxpA1syp7gOhKat/INztctEHy5tW7L7GZY+/CZauHHgyBh4peZzDFIub2zFLH6x+sMZSAU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775011401; c=relaxed/simple; bh=WtgnsxpQ+dy5c3W5T0HgdobslTnRm5MhqesDGk9W5i8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=r9oD9Vt9plomW4FFKr1akHLYX+kJOsqiGqwN8X3cqplOxazYuPygbFFU1gZ7gcm9Ubjtmi885DA/EDWGXb1au5/jNPDI+M5keXMzzQlyeBYOKctIFLxNLHSp6gZdyB2g3YE+ID+NEYqHCzs8Jad8zNc0/ysB/kvkYP/MtF2HWXA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=alliedtelesis.co.nz; spf=pass smtp.mailfrom=alliedtelesis.co.nz; dkim=pass (2048-bit key) header.d=alliedtelesis.co.nz header.i=@alliedtelesis.co.nz header.b=RR0+BBQ9; arc=none smtp.client-ip=202.36.163.20 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=alliedtelesis.co.nz Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=alliedtelesis.co.nz Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=alliedtelesis.co.nz header.i=@alliedtelesis.co.nz header.b="RR0+BBQ9" Received: from svr-chch-seg1.atlnz.lc (mmarshal3.atlnz.lc [10.32.18.43]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by gate2.alliedtelesis.co.nz (Postfix) with ESMTPS id 4F42B2C04CF; Wed, 1 Apr 2026 15:42:58 +1300 (NZDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alliedtelesis.co.nz; s=mail181024; t=1775011378; bh=V3kzs6CbM/I0qSollU73aU8k/gAMn8zq+BS9wg1Y4jc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RR0+BBQ9lAXy/Dhpo82rAkZMdxLwF342iEUYLKJdzjKN9aJ2gJ0Hdx7ulePGrPpg3 n8nzT7LYyDGmycH+Ubb0xTSl6r9UaLW/hpGdfMkfLTqz3OgAEGBsanQu5fBS6fRjpo W3VEPnR3qkCU4rkAkKVNGz9Sze0PNj3+I8oLB3K218gNZWIAgNzjDY3XJ8yPAFM5Bc 10WtkGvCrRIyNbV2m5yjJFvpZVIweYig1mWLFdk+/3CfcI0Yj9AjDy+VBBormM7xNb ixzMzvpGuubygA8H0/jvd7Z561qlxaLyGegCD6mddFxHgkeMCObGLSU3hE79MgSE1D w+oqnsJfgSIqQ== Received: from pat.atlnz.lc (Not Verified[10.32.16.33]) by svr-chch-seg1.atlnz.lc with Trustwave SEG (v8,2,6,11305) id ; Wed, 01 Apr 2026 15:42:58 +1300 Received: from chrisp-dl.ws.atlnz.lc (chrisp-dl.ws.atlnz.lc [10.33.22.12]) by pat.atlnz.lc (Postfix) with ESMTP id 148F613EE36; Wed, 1 Apr 2026 15:42:58 +1300 (NZDT) Received: by chrisp-dl.ws.atlnz.lc (Postfix, from userid 1030) id 1209D28153E; Wed, 1 Apr 2026 15:42:58 +1300 (NZDT) From: Chris Packham To: robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, linux@roeck-us.net Cc: devicetree@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-kernel@vger.kernel.org, Chris Packham Subject: [PATCH v2 2/2] hwmon: pmbus: Add support for Sony APS-379 Date: Wed, 1 Apr 2026 15:42:12 +1300 Message-ID: <20260401024214.804237-3-chris.packham@alliedtelesis.co.nz> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260401024214.804237-1-chris.packham@alliedtelesis.co.nz> References: <20260401024214.804237-1-chris.packham@alliedtelesis.co.nz> 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 X-SEG-SpamProfiler-Analysis: v=2.4 cv=EcprQ+mC c=1 sm=1 tr=0 ts=69cc8632 a=KLBiSEs5mFS1a/PbTCJxuA==:117 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=tjzJJQR1ccDbc0m55AAA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 X-SEG-SpamProfiler-Score: 0 x-atlnz-ls: pat Content-Type: text/plain; charset="utf-8" Add pmbus support for Sony APS-379 power supplies. There are a few PMBUS commands that return data that is undocumented/invalid so these need to be rejected with -ENXIO. The READ_VOUT command returns data in linear11 format instead of linear16 so we need to workaround this. Signed-off-by: Chris Packham --- Notes: Changes in v2: - Simplify code per recommendations from Guenter - Add driver documentation Documentation/hwmon/aps-379.rst | 58 +++++++++++ Documentation/hwmon/index.rst | 1 + drivers/hwmon/pmbus/Kconfig | 6 ++ drivers/hwmon/pmbus/Makefile | 1 + drivers/hwmon/pmbus/aps-379.c | 168 ++++++++++++++++++++++++++++++++ 5 files changed, 234 insertions(+) create mode 100644 Documentation/hwmon/aps-379.rst create mode 100644 drivers/hwmon/pmbus/aps-379.c diff --git a/Documentation/hwmon/aps-379.rst b/Documentation/hwmon/aps-379.= rst new file mode 100644 index 000000000000..468ec5a98fd6 --- /dev/null +++ b/Documentation/hwmon/aps-379.rst @@ -0,0 +1,58 @@ +Kernel driver aps-379 +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D + +Supported chips: + + * Sony APS-379 + + Prefix: 'aps-379' + + Addresses scanned: - + + Authors: + - Chris Packham + +Description +----------- + +This driver implements support for the PMBus monitor on the Sony APS-379 +modular power supply. The APS-379 deviates from the PMBus standard for the +READ_VOUT command by using the linear11 format instead of linear16. + +The known supported PMBus commands are: + +=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=3D=3D=3D=3D +Cmd Function Protocol Scaling Bytes +=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=3D=3D=3D=3D +01 On / Off Command (OPERATION) Byte R/W -- 1 +10 WRITE_PROTECT Byte R/W -- 1 +3B FAN_COMMAND_1 Word R/W -- 2 +46 Current Limit (in percent) Word R/W 2^0 2 +47 Current Limit Fault Response Byte R/W -- 1 +79 Alarm Data Bits (STATUS_WORD) Word Rd -- 2 +8B Output Voltage (READ_VOUT) Word Rd 2^-4 2 +8C Output Current (READ_IOUT) Word Rd 2^-2 2 +8D Power Supply Ambient Temp Word Rd 2^0 2 +90 READ_FAN_SPEED_1 Word Rd 2^6 2 +91 READ_FAN_SPEED_2 Word Rd 2^6 2 +96 Output Wattage (READ_POUT) Word Rd 2^1 2 +97 Input Wattage (READ_PIN) Word Rd 2^1 2 +9A Unit Model Number (MFR_MODEL) Block R/W -- 10 +9B Unit Revision Number Block R/W -- 10 +9E Unit Serial Number Block R/W -- 8 +99 Unit Manufacturer ID (MFR_ID) Block R/W -- 8 +D0 Unit Run Time Information Block Rd -- 4 +D5 Firmware Version Rd cust -- 8 +B0 User Data 1 (USER_DATA_00) Block R/W -- 4 +B1 User Data 2 (USER_DATA_01) Block R/W -- 4 +B2 User Data 3 (USER_DATA_02) Block R/W -- 4 +B3 User Data 4 (USER_DATA_03) Block R/W -- 4 +B4 User Data 5 (USER_DATA_04) Block R/W -- 4 +B5 User Data 6 (USER_DATA_05) Block R/W -- 4 +B6 User Data 7 (USER_DATA_06) Block R/W -- 4 +B7 User Data 8 (USER_DATA_07) Block R/W -- 4 +F0 Calibration command Byte R/W -- 1 +F1 Calibration data Word Wr 2^9 2 +F2 Unlock Calibration Byte Wr -- 1 +=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=3D=3D=3D=3D + diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst index b2ca8513cfcd..2bc8d88b5724 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -41,6 +41,7 @@ Hardware Monitoring Kernel Drivers adt7475 aht10 amc6821 + aps-379 aquacomputer_d5next asb100 asc7621 diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig index fc1273abe357..29076921e330 100644 --- a/drivers/hwmon/pmbus/Kconfig +++ b/drivers/hwmon/pmbus/Kconfig @@ -77,6 +77,12 @@ config SENSORS_ADP1050_REGULATOR =C2=B5Module regulators that can provide microprocessor power from 54V power distribution architecture. =20 +config SENSORS_APS_379 + tristate "Sony APS-379 Power Supplies" + help + If you say yes here you get hardware monitoring support for Sony + APS-379 Power Supplies. + config SENSORS_BEL_PFE tristate "Bel PFE Compatible Power Supplies" help diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile index d6c86924f887..94f36c7069ec 100644 --- a/drivers/hwmon/pmbus/Makefile +++ b/drivers/hwmon/pmbus/Makefile @@ -9,6 +9,7 @@ obj-$(CONFIG_SENSORS_ACBEL_FSG032) +=3D acbel-fsg032.o obj-$(CONFIG_SENSORS_ADM1266) +=3D adm1266.o obj-$(CONFIG_SENSORS_ADM1275) +=3D adm1275.o obj-$(CONFIG_SENSORS_ADP1050) +=3D adp1050.o +obj-$(CONFIG_SENSORS_APS_379) +=3D aps-379.o obj-$(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 diff --git a/drivers/hwmon/pmbus/aps-379.c b/drivers/hwmon/pmbus/aps-379.c new file mode 100644 index 000000000000..edc489558437 --- /dev/null +++ b/drivers/hwmon/pmbus/aps-379.c @@ -0,0 +1,168 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Hardware monitoring driver for Sony APS-379 Power Supplies + * + * Copyright 2026 Allied Telesis Labs + */ + +#include +#include +#include +#include +#include +#include "pmbus.h" + +struct aps_379_data { + struct pmbus_driver_info info; + u8 vout_linear_exponent; +}; + +#define to_aps_379_data(x) container_of(x, struct aps_379_data, info) + +static const struct i2c_device_id aps_379_id[] =3D { + { "aps-379", 0 }, + {}, +}; + +static int aps_379_read_byte_data(struct i2c_client *client, int page, int= reg) +{ + const struct pmbus_driver_info *info =3D pmbus_get_driver_info(client); + struct aps_379_data *data =3D to_aps_379_data(info); + + switch (reg) { + case PMBUS_VOUT_MODE: + /* + * The VOUT format used by the chip is linear11, + * not linear16. Report that VOUT is in linear mode + * and return exponent value extracted while probing + * the chip. + */ + return data->vout_linear_exponent; + default: + return -ENODATA; + } +} + +/* + * The APS-379 uses linear11 format instead of linear16. We've reported th= e exponent + * via the PMBUS_VOUT_MODE so we just return the mantissa here. + */ +static int aps_379_read_vout(struct i2c_client *client) +{ + int ret; + + ret =3D pmbus_read_word_data(client, 0, 0xff, PMBUS_READ_VOUT); + if (ret < 0) + return ret; + + return sign_extend32(ret & 0x7ff, 11); +} + +static int aps_379_read_word_data(struct i2c_client *client, int page, int= phase, int reg) +{ + switch (reg) { + case PMBUS_VOUT_UV_WARN_LIMIT: + case PMBUS_VOUT_OV_WARN_LIMIT: + case PMBUS_VOUT_UV_FAULT_LIMIT: + case PMBUS_VOUT_OV_FAULT_LIMIT: + case PMBUS_PIN_OP_WARN_LIMIT: + case PMBUS_POUT_OP_WARN_LIMIT: + case PMBUS_MFR_IIN_MAX: + case PMBUS_MFR_PIN_MAX: + case PMBUS_MFR_VOUT_MIN: + case PMBUS_MFR_VOUT_MAX: + case PMBUS_MFR_IOUT_MAX: + case PMBUS_MFR_POUT_MAX: + case PMBUS_MFR_MAX_TEMP_1: + /* These commands return data but it is invalid/un-documented */ + return -ENXIO; + case PMBUS_READ_VOUT: + return aps_379_read_vout(client); + default: + if (reg >=3D PMBUS_VIRT_BASE) + return -ENXIO; + else + return -ENODATA; + } +} + +static struct pmbus_driver_info aps_379_info =3D { + .pages =3D 1, + .format[PSC_VOLTAGE_OUT] =3D linear, + .format[PSC_CURRENT_OUT] =3D linear, + .format[PSC_POWER] =3D linear, + .format[PSC_TEMPERATURE] =3D linear, + .format[PSC_FAN] =3D linear, + .func[0] =3D PMBUS_HAVE_VOUT | + PMBUS_HAVE_IOUT | + PMBUS_HAVE_PIN | PMBUS_HAVE_POUT | + PMBUS_HAVE_TEMP | + PMBUS_HAVE_FAN12, + .read_byte_data =3D aps_379_read_byte_data, + .read_word_data =3D aps_379_read_word_data, +}; + +static int aps_379_probe(struct i2c_client *client) +{ + struct device *dev =3D &client->dev; + struct pmbus_driver_info *info; + struct aps_379_data *data; + u8 buf[I2C_SMBUS_BLOCK_MAX + 1]; + int ret; + + data =3D devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + memcpy(&data->info, &aps_379_info, sizeof(*info)); + info =3D &data->info; + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_READ_BYTE_DATA + | I2C_FUNC_SMBUS_READ_WORD_DATA + | I2C_FUNC_SMBUS_READ_BLOCK_DATA)) + return -ENODEV; + + ret =3D i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, buf); + if (ret < 0) { + dev_err(dev, "Failed to read Manufacturer Model\n"); + return ret; + } + + if (strncasecmp(buf, aps_379_id[0].name, strlen(aps_379_id[0].name)) !=3D= 0) { + buf[ret] =3D '\0'; + dev_err(dev, "Unsupported Manufacturer Model '%s'\n", buf); + return -ENODEV; + } + + ret =3D i2c_smbus_read_word_data(client, PMBUS_READ_VOUT); + if (ret < 0) { + dev_err(dev, "Can't get vout exponent.\n"); + return ret; + } + data->vout_linear_exponent =3D (u8)((ret >> 11) & 0x1f); + + return pmbus_do_probe(client, info); +} + +static const struct of_device_id __maybe_unused aps_379_of_match[] =3D { + { .compatible =3D "sony,aps-379" }, + {}, +}; +MODULE_DEVICE_TABLE(of, aps_379_of_match); + +static struct i2c_driver aps_379_driver =3D { + .driver =3D { + .name =3D "aps-379", + .of_match_table =3D of_match_ptr(aps_379_of_match), + }, + .probe =3D aps_379_probe, + .id_table =3D aps_379_id, +}; + +module_i2c_driver(aps_379_driver); + +MODULE_AUTHOR("Chris Packham"); +MODULE_DESCRIPTION("PMBus driver for Sony APS-379"); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS("PMBUS"); --=20 2.53.0