diff options
Diffstat (limited to 'drivers/hwmon/pmbus/ir36021.c')
-rw-r--r-- | drivers/hwmon/pmbus/ir36021.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/drivers/hwmon/pmbus/ir36021.c b/drivers/hwmon/pmbus/ir36021.c new file mode 100644 index 000000000..4dca4767f --- /dev/null +++ b/drivers/hwmon/pmbus/ir36021.c @@ -0,0 +1,80 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Hardware monitoring driver for Infineon IR36021 + * + * Copyright (c) 2021 Allied Telesis + */ +#include <linux/err.h> +#include <linux/i2c.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include "pmbus.h" + +static struct pmbus_driver_info ir36021_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, + .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_STATUS_TEMP, +}; + +static int ir36021_probe(struct i2c_client *client) +{ + u8 buf[I2C_SMBUS_BLOCK_MAX]; + 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_i2c_block_data(client, PMBUS_MFR_MODEL, 2, buf); + if (ret < 0) { + dev_err(&client->dev, "Failed to read PMBUS_MFR_MODEL\n"); + return ret; + } + if (ret != 2 || buf[0] != 0x01 || buf[1] != 0x2d) { + dev_err(&client->dev, "MFR_MODEL unrecognised\n"); + return -ENODEV; + } + + return pmbus_do_probe(client, &ir36021_info); +} + +static const struct i2c_device_id ir36021_id[] = { + { "ir36021", 0 }, + {}, +}; +MODULE_DEVICE_TABLE(i2c, ir36021_id); + +static const struct of_device_id __maybe_unused ir36021_of_id[] = { + { .compatible = "infineon,ir36021" }, + {}, +}; +MODULE_DEVICE_TABLE(of, ir36021_of_id); + +static struct i2c_driver ir36021_driver = { + .class = I2C_CLASS_HWMON, + .driver = { + .name = "ir36021", + .of_match_table = of_match_ptr(ir36021_of_id), + }, + .probe_new = ir36021_probe, + .id_table = ir36021_id, +}; + +module_i2c_driver(ir36021_driver); + +MODULE_AUTHOR("Chris Packham <chris.packham@alliedtelesis.co.nz>"); +MODULE_DESCRIPTION("PMBus driver for Infineon IR36021"); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS(PMBUS); |