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Sun, 11 Aug 2019 21:21:08 -0700 (PDT) Subject: Re: [PATCH v3 2/2] hwmon: pmbus: Add Inspur Power System power supply driver To: John Wang , jdelvare@suse.com, corbet@lwn.net, linux-hwmon@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, miltonm@us.ibm.com, mine260309@gmail.com, duanzhijia01@inspur.com, joel@jms.id.au, openbmc@lists.ozlabs.org References: <20190812025309.15702-1-wangzqbj@inspur.com> From: Guenter Roeck Message-ID: <6cf699d9-6efb-f701-d5ab-6f624e515ab8@roeck-us.net> Date: Sun, 11 Aug 2019 21:21:06 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20190812025309.15702-1-wangzqbj@inspur.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-hwmon-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-hwmon@vger.kernel.org On 8/11/19 7:53 PM, John Wang wrote: > Add the driver to monitor Inspur Power System power supplies > with hwmon over pmbus. > > This driver adds sysfs attributes for additional power supply data, > including vendor, model, part_number, serial number, > firmware revision, hardware revision, and psu mode(active/standby). > > Signed-off-by: John Wang > --- > v3: > - Sort kconfig/makefile entries alphabetically > - Remove unnecessary initialization > - Use ATTRIBUTE_GROUPS instead of expanding directly > - Use memscan to avoid reimplementation > v2: > - Fix typos in commit message > - Invert Christmas tree > - Configure device with sysfs attrs, not debugfs entries > - Fix errno in fw_version_read, ENODATA to EPROTO > - Change the print format of fw-version > - Use sysfs_streq instead of strcmp("xxx" "\n", "xxx") > - Document sysfs attributes > --- > Documentation/hwmon/inspur-ipsps1.rst | 79 +++++++++ > drivers/hwmon/pmbus/Kconfig | 9 + > drivers/hwmon/pmbus/Makefile | 41 ++--- > drivers/hwmon/pmbus/inspur-ipsps.c | 226 ++++++++++++++++++++++++++ > 4 files changed, 335 insertions(+), 20 deletions(-) > create mode 100644 Documentation/hwmon/inspur-ipsps1.rst > create mode 100644 drivers/hwmon/pmbus/inspur-ipsps.c > > diff --git a/Documentation/hwmon/inspur-ipsps1.rst b/Documentation/hwmon/inspur-ipsps1.rst > new file mode 100644 > index 000000000000..aa19f0ccc8b0 > --- /dev/null > +++ b/Documentation/hwmon/inspur-ipsps1.rst > @@ -0,0 +1,79 @@ > +Kernel driver inspur-ipsps1 > +======================= > + > +Supported chips: > + > + * Inspur Power System power supply unit > + > +Author: John Wang > + > +Description > +----------- > + > +This driver supports Inspur Power System power supplies. This driver > +is a client to the core PMBus driver. > + > +Usage Notes > +----------- > + > +This driver does not auto-detect devices. You will have to instantiate the > +devices explicitly. Please see Documentation/i2c/instantiating-devices for > +details. > + > +Sysfs entries > +------------- > + > +The following attributes are supported: > + > +======================= ====================================================== > +curr1_input Measured input current > +curr1_label "iin" > +curr1_max Maximum current > +curr1_max_alarm Current high alarm > +curr2_input Measured output current in mA. > +curr2_label "iout1" > +curr2_crit Critical maximum current > +curr2_crit_alarm Current critical high alarm > +curr2_max Maximum current > +curr2_max_alarm Current high alarm > + > +fan1_alarm Fan 1 warning. > +fan1_fault Fan 1 fault. > +fan1_input Fan 1 speed in RPM. > + > +in1_alarm Input voltage under-voltage alarm. > +in1_input Measured input voltage in mV. > +in1_label "vin" > +in2_input Measured output voltage in mV. > +in2_label "vout1" > +in2_lcrit Critical minimum output voltage > +in2_lcrit_alarm Output voltage critical low alarm > +in2_max Maximum output voltage > +in2_max_alarm Output voltage high alarm > +in2_min Minimum output voltage > +in2_min_alarm Output voltage low alarm > + > +power1_alarm Input fault or alarm. > +power1_input Measured input power in uW. > +power1_label "pin" > +power1_max Input power limit > +power2_max_alarm Output power high alarm > +power2_max Output power limit > +power2_input Measured output power in uW. > +power2_label "pout" > + > +temp[1-3]_input Measured temperature > +temp[1-2]_max Maximum temperature > +temp[1-3]_max_alarm Temperature high alarm > + > +vendor Manufacturer name > +model Product model > +part_number Product part number > +serial_number Product serial number > +fw_version Firmware version > +hw_version Hardware version > +mode Work mode. Can be set to active or > + standby, when set to standby, PSU will > + automatically switch between standby > + and redundancy mode. > +======================= ====================================================== > diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig > index 30751eb9550a..2370fce6e816 100644 > --- a/drivers/hwmon/pmbus/Kconfig > +++ b/drivers/hwmon/pmbus/Kconfig > @@ -46,6 +46,15 @@ config SENSORS_IBM_CFFPS > This driver can also be built as a module. If so, the module will > be called ibm-cffps. > > +config SENSORS_INSPUR_IPSPS > + tristate "INSPUR Power System Power Supply" > + help > + If you say yes here you get hardware monitoring support for the INSPUR > + Power System power supply. > + > + This driver can also be built as a module. If so, the module will > + be called inspur-ipsps. > + > config SENSORS_IR35221 > tristate "Infineon IR35221" > help > diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile > index 2219b9300316..c4f82f65f2ad 100644 > --- a/drivers/hwmon/pmbus/Makefile > +++ b/drivers/hwmon/pmbus/Makefile > @@ -3,23 +3,24 @@ > # Makefile for PMBus chip drivers. > # > > -obj-$(CONFIG_PMBUS) += pmbus_core.o > -obj-$(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_IR38064) += ir38064.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 > -obj-$(CONFIG_SENSORS_MAX16064) += max16064.o > -obj-$(CONFIG_SENSORS_MAX20751) += max20751.o > -obj-$(CONFIG_SENSORS_MAX31785) += max31785.o > -obj-$(CONFIG_SENSORS_MAX34440) += max34440.o > -obj-$(CONFIG_SENSORS_MAX8688) += max8688.o > -obj-$(CONFIG_SENSORS_TPS40422) += tps40422.o > -obj-$(CONFIG_SENSORS_TPS53679) += tps53679.o > -obj-$(CONFIG_SENSORS_UCD9000) += ucd9000.o > -obj-$(CONFIG_SENSORS_UCD9200) += ucd9200.o > -obj-$(CONFIG_SENSORS_ZL6100) += zl6100.o > +obj-$(CONFIG_PMBUS) += pmbus_core.o > +obj-$(CONFIG_SENSORS_PMBUS) += pmbus.o > +obj-$(CONFIG_SENSORS_ADM1275) += adm1275.o > +obj-$(CONFIG_SENSORS_IBM_CFFPS) += ibm-cffps.o > +obj-$(CONFIG_SENSORS_INSPUR_IPSPS) += inspur-ipsps.o > +obj-$(CONFIG_SENSORS_IR35221) += ir35221.o > +obj-$(CONFIG_SENSORS_IR38064) += ir38064.o > +obj-$(CONFIG_SENSORS_ISL68137) += isl68137.o > +obj-$(CONFIG_SENSORS_LM25066) += lm25066.o > +obj-$(CONFIG_SENSORS_LTC2978) += ltc2978.o > +obj-$(CONFIG_SENSORS_LTC3815) += ltc3815.o > +obj-$(CONFIG_SENSORS_MAX16064) += max16064.o > +obj-$(CONFIG_SENSORS_MAX20751) += max20751.o > +obj-$(CONFIG_SENSORS_MAX31785) += max31785.o > +obj-$(CONFIG_SENSORS_MAX34440) += max34440.o > +obj-$(CONFIG_SENSORS_MAX8688) += max8688.o > +obj-$(CONFIG_SENSORS_TPS40422) += tps40422.o > +obj-$(CONFIG_SENSORS_TPS53679) += tps53679.o > +obj-$(CONFIG_SENSORS_UCD9000) += ucd9000.o > +obj-$(CONFIG_SENSORS_UCD9200) += ucd9200.o > +obj-$(CONFIG_SENSORS_ZL6100) += zl6100.o Are you serious ? I am not going to accept this. Guenter > diff --git a/drivers/hwmon/pmbus/inspur-ipsps.c b/drivers/hwmon/pmbus/inspur-ipsps.c > new file mode 100644 > index 000000000000..fa981b881a60 > --- /dev/null > +++ b/drivers/hwmon/pmbus/inspur-ipsps.c > @@ -0,0 +1,226 @@ > +// SPDX-License-Identifier: GPL-2.0-or-later > +/* > + * Copyright 2019 Inspur Corp. > + */ > + > +#include > +#include > +#include > +#include > +#include > +#include > +#include > + > +#include "pmbus.h" > + > +#define IPSPS_REG_VENDOR_ID 0x99 > +#define IPSPS_REG_MODEL 0x9A > +#define IPSPS_REG_FW_VERSION 0x9B > +#define IPSPS_REG_PN 0x9C > +#define IPSPS_REG_SN 0x9E > +#define IPSPS_REG_HW_VERSION 0xB0 > +#define IPSPS_REG_MODE 0xFC > + > +#define MODE_ACTIVE 0x55 > +#define MODE_STANDBY 0x0E > +#define MODE_REDUNDANCY 0x00 > + > +#define MODE_ACTIVE_STRING "active" > +#define MODE_STANDBY_STRING "standby" > +#define MODE_REDUNDANCY_STRING "redundancy" > + > +enum ipsps_index { > + vendor, > + model, > + fw_version, > + part_number, > + serial_number, > + hw_version, > + mode, > + num_regs, > +}; > + > +static const u8 ipsps_regs[num_regs] = { > + [vendor] = IPSPS_REG_VENDOR_ID, > + [model] = IPSPS_REG_MODEL, > + [fw_version] = IPSPS_REG_FW_VERSION, > + [part_number] = IPSPS_REG_PN, > + [serial_number] = IPSPS_REG_SN, > + [hw_version] = IPSPS_REG_HW_VERSION, > + [mode] = IPSPS_REG_MODE, > +}; > + > +static ssize_t ipsps_string_show(struct device *dev, > + struct device_attribute *devattr, > + char *buf) > +{ > + u8 reg; > + int rc; > + char *p; > + char data[I2C_SMBUS_BLOCK_MAX + 1]; > + struct i2c_client *client = to_i2c_client(dev->parent); > + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); > + > + reg = ipsps_regs[attr->index]; > + rc = i2c_smbus_read_block_data(client, reg, data); > + if (rc < 0) > + return rc; > + > + /* filled with printable characters, ending with # */ > + p = memscan(data, '#', rc); > + *p = '\0'; > + > + return snprintf(buf, PAGE_SIZE, "%s\n", data); > +} > + > +static ssize_t ipsps_fw_version_show(struct device *dev, > + struct device_attribute *devattr, > + char *buf) > +{ > + u8 reg; > + int rc; > + u8 data[I2C_SMBUS_BLOCK_MAX] = { 0 }; > + struct i2c_client *client = to_i2c_client(dev->parent); > + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); > + > + reg = ipsps_regs[attr->index]; > + rc = i2c_smbus_read_block_data(client, reg, data); > + if (rc < 0) > + return rc; > + > + if (rc != 6) > + return -EPROTO; > + > + return snprintf(buf, PAGE_SIZE, "%u.%02u%u-%u.%02u\n", > + data[1], data[2]/* < 100 */, data[3]/*< 10*/, > + data[4], data[5]/* < 100 */); > +} > + > +static ssize_t ipsps_mode_show(struct device *dev, > + struct device_attribute *devattr, char *buf) > +{ > + u8 reg; > + int rc; > + struct i2c_client *client = to_i2c_client(dev->parent); > + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); > + > + reg = ipsps_regs[attr->index]; > + rc = i2c_smbus_read_byte_data(client, reg); > + if (rc < 0) > + return rc; > + > + switch (rc) { > + case MODE_ACTIVE: > + return snprintf(buf, PAGE_SIZE, "[%s] %s %s\n", > + MODE_ACTIVE_STRING, > + MODE_STANDBY_STRING, MODE_REDUNDANCY_STRING); > + case MODE_STANDBY: > + return snprintf(buf, PAGE_SIZE, "%s [%s] %s\n", > + MODE_ACTIVE_STRING, > + MODE_STANDBY_STRING, MODE_REDUNDANCY_STRING); > + case MODE_REDUNDANCY: > + return snprintf(buf, PAGE_SIZE, "%s %s [%s]\n", > + MODE_ACTIVE_STRING, > + MODE_STANDBY_STRING, MODE_REDUNDANCY_STRING); > + default: > + return snprintf(buf, PAGE_SIZE, "unspecified\n"); > + } > +} > + > +static ssize_t ipsps_mode_store(struct device *dev, > + struct device_attribute *devattr, > + const char *buf, size_t count) > +{ > + u8 reg; > + int rc; > + struct i2c_client *client = to_i2c_client(dev->parent); > + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); > + > + reg = ipsps_regs[attr->index]; > + if (sysfs_streq(MODE_STANDBY_STRING, buf)) { > + rc = i2c_smbus_write_byte_data(client, reg, > + MODE_STANDBY); > + if (rc < 0) > + return rc; > + return count; > + } else if (sysfs_streq(MODE_ACTIVE_STRING, buf)) { > + rc = i2c_smbus_write_byte_data(client, reg, > + MODE_ACTIVE); > + if (rc < 0) > + return rc; > + return count; > + } > + > + return -EINVAL; > +} > + > +static SENSOR_DEVICE_ATTR_RO(vendor, ipsps_string, vendor); > +static SENSOR_DEVICE_ATTR_RO(model, ipsps_string, model); > +static SENSOR_DEVICE_ATTR_RO(part_number, ipsps_string, part_number); > +static SENSOR_DEVICE_ATTR_RO(serial_number, ipsps_string, serial_number); > +static SENSOR_DEVICE_ATTR_RO(hw_version, ipsps_string, hw_version); > +static SENSOR_DEVICE_ATTR_RO(fw_version, ipsps_fw_version, fw_version); > +static SENSOR_DEVICE_ATTR_RW(mode, ipsps_mode, mode); > + > +static struct attribute *ipsps_attrs[] = { > + &sensor_dev_attr_vendor.dev_attr.attr, > + &sensor_dev_attr_model.dev_attr.attr, > + &sensor_dev_attr_part_number.dev_attr.attr, > + &sensor_dev_attr_serial_number.dev_attr.attr, > + &sensor_dev_attr_hw_version.dev_attr.attr, > + &sensor_dev_attr_fw_version.dev_attr.attr, > + &sensor_dev_attr_mode.dev_attr.attr, > + NULL, > +}; > + > +ATTRIBUTE_GROUPS(ipsps); > + > +static struct pmbus_driver_info ipsps_info = { > + .pages = 1, > + .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT | > + PMBUS_HAVE_IIN | PMBUS_HAVE_POUT | PMBUS_HAVE_PIN | > + PMBUS_HAVE_FAN12 | PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 | > + PMBUS_HAVE_TEMP3 | PMBUS_HAVE_STATUS_VOUT | > + PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_INPUT | > + PMBUS_HAVE_STATUS_TEMP | PMBUS_HAVE_STATUS_FAN12, > + .groups = ipsps_groups, > +}; > + > +static struct pmbus_platform_data ipsps_pdata = { > + .flags = PMBUS_SKIP_STATUS_CHECK, > +}; > + > +static int ipsps_probe(struct i2c_client *client, > + const struct i2c_device_id *id) > +{ > + client->dev.platform_data = &ipsps_pdata; > + return pmbus_do_probe(client, id, &ipsps_info); > +} > + > +static const struct i2c_device_id ipsps_id[] = { > + { "inspur_ipsps1", 0 }, > + {} > +}; > +MODULE_DEVICE_TABLE(i2c, ipsps_id); > + > +static const struct of_device_id ipsps_of_match[] = { > + { .compatible = "inspur,ipsps1" }, > + {} > +}; > +MODULE_DEVICE_TABLE(of, ipsps_of_match); > + > +static struct i2c_driver ipsps_driver = { > + .driver = { > + .name = "inspur-ipsps", > + .of_match_table = ipsps_of_match, > + }, > + .probe = ipsps_probe, > + .remove = pmbus_do_remove, > + .id_table = ipsps_id, > +}; > + > +module_i2c_driver(ipsps_driver); > + > +MODULE_AUTHOR("John Wang"); > +MODULE_DESCRIPTION("PMBus driver for Inspur Power System power supplies"); > +MODULE_LICENSE("GPL"); >