| Message ID | 20210317040231.21490-3-chris.packham@alliedtelesis.co.nz (mailing list archive) |
|---|---|
| State | Accepted |
| Headers | show |
| Series | [v3,1/3] dt-bindings: Add vendor prefix and trivial device for BluTek BPA-RS600 | expand |
On Wed, Mar 17, 2021 at 05:02:31PM +1300, Chris Packham wrote: > The BPA-RS600 is a compact 600W AC to DC removable power supply module. > > Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> For my reference (aiting for bindings approval): Reviewed-by: Guenter Roeck <linux@roeck-us.net> Guenter > --- > > Notes: > Changes in v3: > - Fix typo BPD -> BPA > - Allow for NUL terminator in buf > Changes in v2: > - Whitespace and line length cleanup > - Add comments about commands that return data but shouldn't be used > > Documentation/hwmon/bpa-rs600.rst | 74 +++++++++++++ > drivers/hwmon/pmbus/Kconfig | 9 ++ > drivers/hwmon/pmbus/Makefile | 1 + > drivers/hwmon/pmbus/bpa-rs600.c | 172 ++++++++++++++++++++++++++++++ > 4 files changed, 256 insertions(+) > create mode 100644 Documentation/hwmon/bpa-rs600.rst > create mode 100644 drivers/hwmon/pmbus/bpa-rs600.c > > diff --git a/Documentation/hwmon/bpa-rs600.rst b/Documentation/hwmon/bpa-rs600.rst > new file mode 100644 > index 000000000000..28313995d4ae > --- /dev/null > +++ b/Documentation/hwmon/bpa-rs600.rst > @@ -0,0 +1,74 @@ > +.. SPDX-License-Identifier: GPL-2.0 > + > +Kernel driver bpa-rs600 > +======================= > + > +Supported chips: > + > + * BPA-RS600-120 > + > + Datasheet: Publicly available at the BluTek website > + http://blutekpower.com/wp-content/uploads/2019/01/BPA-RS600-120-07-19-2018.pdf > + > +Authors: > + - Chris Packham <chris.packham@alliedtelesis.co.nz> > + > +Description > +----------- > + > +The BPA-RS600 is a compact 600W removable power supply module. > + > +Usage Notes > +----------- > + > +This driver does not probe for PMBus devices. You will have to instantiate > +devices explicitly. > + > +Sysfs attributes > +---------------- > + > +======================= ============================================ > +curr1_label "iin" > +curr1_input Measured input current > +curr1_max Maximum input current > +curr1_max_alarm Input current high alarm > + > +curr2_label "iout1" > +curr2_input Measured output current > +curr2_max Maximum output current > +curr2_max_alarm Output current high alarm > + > +fan1_input Measured fan speed > +fan1_alarm Fan warning > +fan1_fault Fan fault > + > +in1_label "vin" > +in1_input Measured input voltage > +in1_max Maximum input voltage > +in1_max_alarm Input voltage high alarm > +in1_min Minimum input voltage > +in1_min_alarm Input voltage low alarm > + > +in2_label "vout1" > +in2_input Measured output voltage > +in2_max Maximum output voltage > +in2_max_alarm Output voltage high alarm > +in2_min Maximum output voltage > +in2_min_alarm Output voltage low alarm > + > +power1_label "pin" > +power1_input Measured input power > +power1_alarm Input power alarm > +power1_max Maximum input power > + > +power2_label "pout1" > +power2_input Measured output power > +power2_max Maximum output power > +power2_max_alarm Output power high alarm > + > +temp1_input Measured temperature around input connector > +temp1_alarm Temperature alarm > + > +temp2_input Measured temperature around output connector > +temp2_alarm Temperature alarm > +======================= ============================================ > diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig > index 32d2fc850621..512d6f656dca 100644 > --- a/drivers/hwmon/pmbus/Kconfig > +++ b/drivers/hwmon/pmbus/Kconfig > @@ -56,6 +56,15 @@ config SENSORS_BEL_PFE > This driver can also be built as a module. If so, the module will > be called bel-pfe. > > +config SENSORS_BPA_RS600 > + tristate "BluTek BPA-RS600 Power Supplies" > + help > + If you say yes here you get hardware monitoring support for BluTek > + BPA-RS600 Power Supplies. > + > + This driver can also be built as a module. If so, the module will > + be called bpa-rs600. > + > 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 6a4ba0fdc1db..80a437060dc4 100644 > --- a/drivers/hwmon/pmbus/Makefile > +++ b/drivers/hwmon/pmbus/Makefile > @@ -8,6 +8,7 @@ obj-$(CONFIG_SENSORS_PMBUS) += pmbus.o > obj-$(CONFIG_SENSORS_ADM1266) += adm1266.o > obj-$(CONFIG_SENSORS_ADM1275) += adm1275.o > obj-$(CONFIG_SENSORS_BEL_PFE) += bel-pfe.o > +obj-$(CONFIG_SENSORS_BPA_RS600) += bpa-rs600.o > obj-$(CONFIG_SENSORS_IBM_CFFPS) += ibm-cffps.o > obj-$(CONFIG_SENSORS_INSPUR_IPSPS) += inspur-ipsps.o > obj-$(CONFIG_SENSORS_IR35221) += ir35221.o > diff --git a/drivers/hwmon/pmbus/bpa-rs600.c b/drivers/hwmon/pmbus/bpa-rs600.c > new file mode 100644 > index 000000000000..c4ede68b3e26 > --- /dev/null > +++ b/drivers/hwmon/pmbus/bpa-rs600.c > @@ -0,0 +1,172 @@ > +// SPDX-License-Identifier: GPL-2.0-or-later > +/* > + * Hardware monitoring driver for BluTek BPA-RS600 Power Supplies > + * > + * Copyright 2021 Allied Telesis Labs > + */ > + > +#include <linux/i2c.h> > +#include <linux/init.h> > +#include <linux/kernel.h> > +#include <linux/module.h> > +#include <linux/pmbus.h> > +#include "pmbus.h" > + > +#define BPARS600_MFR_VIN_MIN 0xa0 > +#define BPARS600_MFR_VIN_MAX 0xa1 > +#define BPARS600_MFR_IIN_MAX 0xa2 > +#define BPARS600_MFR_PIN_MAX 0xa3 > +#define BPARS600_MFR_VOUT_MIN 0xa4 > +#define BPARS600_MFR_VOUT_MAX 0xa5 > +#define BPARS600_MFR_IOUT_MAX 0xa6 > +#define BPARS600_MFR_POUT_MAX 0xa7 > + > +static int bpa_rs600_read_byte_data(struct i2c_client *client, int page, int reg) > +{ > + int ret; > + > + if (page > 0) > + return -ENXIO; > + > + switch (reg) { > + case PMBUS_FAN_CONFIG_12: > + /* > + * Two fans are reported in PMBUS_FAN_CONFIG_12 but there is > + * only one fan in the module. Mask out the FAN2 bits. > + */ > + ret = pmbus_read_byte_data(client, 0, PMBUS_FAN_CONFIG_12); > + if (ret >= 0) > + ret &= ~(PB_FAN_2_INSTALLED | PB_FAN_2_PULSE_MASK); > + break; > + default: > + ret = -ENODATA; > + break; > + } > + > + return ret; > +} > + > +static int bpa_rs600_read_word_data(struct i2c_client *client, int page, int phase, int reg) > +{ > + int ret; > + > + if (page > 0) > + return -ENXIO; > + > + switch (reg) { > + case PMBUS_VIN_UV_WARN_LIMIT: > + ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_VIN_MIN); > + break; > + case PMBUS_VIN_OV_WARN_LIMIT: > + ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_VIN_MAX); > + break; > + case PMBUS_VOUT_UV_WARN_LIMIT: > + ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_VOUT_MIN); > + break; > + case PMBUS_VOUT_OV_WARN_LIMIT: > + ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_VOUT_MAX); > + break; > + case PMBUS_IIN_OC_WARN_LIMIT: > + ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_IIN_MAX); > + break; > + case PMBUS_IOUT_OC_WARN_LIMIT: > + ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_IOUT_MAX); > + break; > + case PMBUS_PIN_OP_WARN_LIMIT: > + ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_PIN_MAX); > + break; > + case PMBUS_POUT_OP_WARN_LIMIT: > + ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_POUT_MAX); > + break; > + case PMBUS_VIN_UV_FAULT_LIMIT: > + case PMBUS_VIN_OV_FAULT_LIMIT: > + case PMBUS_VOUT_UV_FAULT_LIMIT: > + case PMBUS_VOUT_OV_FAULT_LIMIT: > + /* These commands return data but it is invalid/un-documented */ > + ret = -ENXIO; > + break; > + default: > + if (reg >= PMBUS_VIRT_BASE) > + ret = -ENXIO; > + else > + ret = -ENODATA; > + break; > + } > + > + return ret; > +} > + > +static struct pmbus_driver_info bpa_rs600_info = { > + .pages = 1, > + .format[PSC_VOLTAGE_IN] = linear, > + .format[PSC_VOLTAGE_OUT] = linear, > + .format[PSC_CURRENT_IN] = linear, > + .format[PSC_CURRENT_OUT] = linear, > + .format[PSC_POWER] = linear, > + .format[PSC_TEMPERATURE] = linear, > + .format[PSC_FAN] = linear, > + .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | > + PMBUS_HAVE_IIN | PMBUS_HAVE_IOUT | > + PMBUS_HAVE_PIN | PMBUS_HAVE_POUT | > + PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 | > + PMBUS_HAVE_FAN12 | > + PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT | > + PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP | > + PMBUS_HAVE_STATUS_FAN12, > + .read_byte_data = bpa_rs600_read_byte_data, > + .read_word_data = bpa_rs600_read_word_data, > +}; > + > +static int bpa_rs600_probe(struct i2c_client *client) > +{ > + struct device *dev = &client->dev; > + u8 buf[I2C_SMBUS_BLOCK_MAX + 1]; > + int ret; > + > + 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 = 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 (strncmp(buf, "BPA-RS600", 8)) { > + buf[ret] = '\0'; > + dev_err(dev, "Unsupported Manufacturer Model '%s'\n", buf); > + return -ENODEV; > + } > + > + return pmbus_do_probe(client, &bpa_rs600_info); > +} > + > +static const struct i2c_device_id bpa_rs600_id[] = { > + { "bpars600", 0 }, > + {}, > +}; > +MODULE_DEVICE_TABLE(i2c, bpa_rs600_id); > + > +static const struct of_device_id __maybe_unused bpa_rs600_of_match[] = { > + { .compatible = "blutek,bpa-rs600" }, > + {}, > +}; > +MODULE_DEVICE_TABLE(of, bpa_rs600_of_match); > + > +static struct i2c_driver bpa_rs600_driver = { > + .driver = { > + .name = "bpa-rs600", > + .of_match_table = of_match_ptr(bpa_rs600_of_match), > + }, > + .probe_new = bpa_rs600_probe, > + .id_table = bpa_rs600_id, > +}; > + > +module_i2c_driver(bpa_rs600_driver); > + > +MODULE_AUTHOR("Chris Packham"); > +MODULE_DESCRIPTION("PMBus driver for BluTek BPA-RS600"); > +MODULE_LICENSE("GPL");
On Wed, Mar 17, 2021 at 05:02:31PM +1300, Chris Packham wrote: > The BPA-RS600 is a compact 600W AC to DC removable power supply module. > > Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> > Reviewed-by: Guenter Roeck <linux@roeck-us.net> Applied to hwmon-next. Thanks, Guenter
diff --git a/Documentation/hwmon/bpa-rs600.rst b/Documentation/hwmon/bpa-rs600.rst new file mode 100644 index 000000000000..28313995d4ae --- /dev/null +++ b/Documentation/hwmon/bpa-rs600.rst @@ -0,0 +1,74 @@ +.. SPDX-License-Identifier: GPL-2.0 + +Kernel driver bpa-rs600 +======================= + +Supported chips: + + * BPA-RS600-120 + + Datasheet: Publicly available at the BluTek website + http://blutekpower.com/wp-content/uploads/2019/01/BPA-RS600-120-07-19-2018.pdf + +Authors: + - Chris Packham <chris.packham@alliedtelesis.co.nz> + +Description +----------- + +The BPA-RS600 is a compact 600W removable power supply module. + +Usage Notes +----------- + +This driver does not probe for PMBus devices. You will have to instantiate +devices explicitly. + +Sysfs attributes +---------------- + +======================= ============================================ +curr1_label "iin" +curr1_input Measured input current +curr1_max Maximum input current +curr1_max_alarm Input current high alarm + +curr2_label "iout1" +curr2_input Measured output current +curr2_max Maximum output current +curr2_max_alarm Output current high alarm + +fan1_input Measured fan speed +fan1_alarm Fan warning +fan1_fault Fan fault + +in1_label "vin" +in1_input Measured input voltage +in1_max Maximum input voltage +in1_max_alarm Input voltage high alarm +in1_min Minimum input voltage +in1_min_alarm Input voltage low alarm + +in2_label "vout1" +in2_input Measured output voltage +in2_max Maximum output voltage +in2_max_alarm Output voltage high alarm +in2_min Maximum output voltage +in2_min_alarm Output voltage low alarm + +power1_label "pin" +power1_input Measured input power +power1_alarm Input power alarm +power1_max Maximum input power + +power2_label "pout1" +power2_input Measured output power +power2_max Maximum output power +power2_max_alarm Output power high alarm + +temp1_input Measured temperature around input connector +temp1_alarm Temperature alarm + +temp2_input Measured temperature around output connector +temp2_alarm Temperature alarm +======================= ============================================ diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig index 32d2fc850621..512d6f656dca 100644 --- a/drivers/hwmon/pmbus/Kconfig +++ b/drivers/hwmon/pmbus/Kconfig @@ -56,6 +56,15 @@ config SENSORS_BEL_PFE This driver can also be built as a module. If so, the module will be called bel-pfe. +config SENSORS_BPA_RS600 + tristate "BluTek BPA-RS600 Power Supplies" + help + If you say yes here you get hardware monitoring support for BluTek + BPA-RS600 Power Supplies. + + This driver can also be built as a module. If so, the module will + be called bpa-rs600. + 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 6a4ba0fdc1db..80a437060dc4 100644 --- a/drivers/hwmon/pmbus/Makefile +++ b/drivers/hwmon/pmbus/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_SENSORS_PMBUS) += pmbus.o obj-$(CONFIG_SENSORS_ADM1266) += adm1266.o obj-$(CONFIG_SENSORS_ADM1275) += adm1275.o obj-$(CONFIG_SENSORS_BEL_PFE) += bel-pfe.o +obj-$(CONFIG_SENSORS_BPA_RS600) += bpa-rs600.o obj-$(CONFIG_SENSORS_IBM_CFFPS) += ibm-cffps.o obj-$(CONFIG_SENSORS_INSPUR_IPSPS) += inspur-ipsps.o obj-$(CONFIG_SENSORS_IR35221) += ir35221.o diff --git a/drivers/hwmon/pmbus/bpa-rs600.c b/drivers/hwmon/pmbus/bpa-rs600.c new file mode 100644 index 000000000000..c4ede68b3e26 --- /dev/null +++ b/drivers/hwmon/pmbus/bpa-rs600.c @@ -0,0 +1,172 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Hardware monitoring driver for BluTek BPA-RS600 Power Supplies + * + * Copyright 2021 Allied Telesis Labs + */ + +#include <linux/i2c.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/pmbus.h> +#include "pmbus.h" + +#define BPARS600_MFR_VIN_MIN 0xa0 +#define BPARS600_MFR_VIN_MAX 0xa1 +#define BPARS600_MFR_IIN_MAX 0xa2 +#define BPARS600_MFR_PIN_MAX 0xa3 +#define BPARS600_MFR_VOUT_MIN 0xa4 +#define BPARS600_MFR_VOUT_MAX 0xa5 +#define BPARS600_MFR_IOUT_MAX 0xa6 +#define BPARS600_MFR_POUT_MAX 0xa7 + +static int bpa_rs600_read_byte_data(struct i2c_client *client, int page, int reg) +{ + int ret; + + if (page > 0) + return -ENXIO; + + switch (reg) { + case PMBUS_FAN_CONFIG_12: + /* + * Two fans are reported in PMBUS_FAN_CONFIG_12 but there is + * only one fan in the module. Mask out the FAN2 bits. + */ + ret = pmbus_read_byte_data(client, 0, PMBUS_FAN_CONFIG_12); + if (ret >= 0) + ret &= ~(PB_FAN_2_INSTALLED | PB_FAN_2_PULSE_MASK); + break; + default: + ret = -ENODATA; + break; + } + + return ret; +} + +static int bpa_rs600_read_word_data(struct i2c_client *client, int page, int phase, int reg) +{ + int ret; + + if (page > 0) + return -ENXIO; + + switch (reg) { + case PMBUS_VIN_UV_WARN_LIMIT: + ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_VIN_MIN); + break; + case PMBUS_VIN_OV_WARN_LIMIT: + ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_VIN_MAX); + break; + case PMBUS_VOUT_UV_WARN_LIMIT: + ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_VOUT_MIN); + break; + case PMBUS_VOUT_OV_WARN_LIMIT: + ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_VOUT_MAX); + break; + case PMBUS_IIN_OC_WARN_LIMIT: + ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_IIN_MAX); + break; + case PMBUS_IOUT_OC_WARN_LIMIT: + ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_IOUT_MAX); + break; + case PMBUS_PIN_OP_WARN_LIMIT: + ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_PIN_MAX); + break; + case PMBUS_POUT_OP_WARN_LIMIT: + ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_POUT_MAX); + break; + case PMBUS_VIN_UV_FAULT_LIMIT: + case PMBUS_VIN_OV_FAULT_LIMIT: + case PMBUS_VOUT_UV_FAULT_LIMIT: + case PMBUS_VOUT_OV_FAULT_LIMIT: + /* These commands return data but it is invalid/un-documented */ + ret = -ENXIO; + break; + default: + if (reg >= PMBUS_VIRT_BASE) + ret = -ENXIO; + else + ret = -ENODATA; + break; + } + + return ret; +} + +static struct pmbus_driver_info bpa_rs600_info = { + .pages = 1, + .format[PSC_VOLTAGE_IN] = linear, + .format[PSC_VOLTAGE_OUT] = linear, + .format[PSC_CURRENT_IN] = linear, + .format[PSC_CURRENT_OUT] = linear, + .format[PSC_POWER] = linear, + .format[PSC_TEMPERATURE] = linear, + .format[PSC_FAN] = linear, + .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | + PMBUS_HAVE_IIN | PMBUS_HAVE_IOUT | + PMBUS_HAVE_PIN | PMBUS_HAVE_POUT | + PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 | + PMBUS_HAVE_FAN12 | + PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT | + PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP | + PMBUS_HAVE_STATUS_FAN12, + .read_byte_data = bpa_rs600_read_byte_data, + .read_word_data = bpa_rs600_read_word_data, +}; + +static int bpa_rs600_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + u8 buf[I2C_SMBUS_BLOCK_MAX + 1]; + int ret; + + 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 = 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 (strncmp(buf, "BPA-RS600", 8)) { + buf[ret] = '\0'; + dev_err(dev, "Unsupported Manufacturer Model '%s'\n", buf); + return -ENODEV; + } + + return pmbus_do_probe(client, &bpa_rs600_info); +} + +static const struct i2c_device_id bpa_rs600_id[] = { + { "bpars600", 0 }, + {}, +}; +MODULE_DEVICE_TABLE(i2c, bpa_rs600_id); + +static const struct of_device_id __maybe_unused bpa_rs600_of_match[] = { + { .compatible = "blutek,bpa-rs600" }, + {}, +}; +MODULE_DEVICE_TABLE(of, bpa_rs600_of_match); + +static struct i2c_driver bpa_rs600_driver = { + .driver = { + .name = "bpa-rs600", + .of_match_table = of_match_ptr(bpa_rs600_of_match), + }, + .probe_new = bpa_rs600_probe, + .id_table = bpa_rs600_id, +}; + +module_i2c_driver(bpa_rs600_driver); + +MODULE_AUTHOR("Chris Packham"); +MODULE_DESCRIPTION("PMBus driver for BluTek BPA-RS600"); +MODULE_LICENSE("GPL");
The BPA-RS600 is a compact 600W AC to DC removable power supply module. Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> --- Notes: Changes in v3: - Fix typo BPD -> BPA - Allow for NUL terminator in buf Changes in v2: - Whitespace and line length cleanup - Add comments about commands that return data but shouldn't be used Documentation/hwmon/bpa-rs600.rst | 74 +++++++++++++ drivers/hwmon/pmbus/Kconfig | 9 ++ drivers/hwmon/pmbus/Makefile | 1 + drivers/hwmon/pmbus/bpa-rs600.c | 172 ++++++++++++++++++++++++++++++ 4 files changed, 256 insertions(+) create mode 100644 Documentation/hwmon/bpa-rs600.rst create mode 100644 drivers/hwmon/pmbus/bpa-rs600.c