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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/hwmon/pmbus/pli1209bc.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/hwmon/pmbus/pli1209bc.c')
-rw-r--r-- | drivers/hwmon/pmbus/pli1209bc.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/drivers/hwmon/pmbus/pli1209bc.c b/drivers/hwmon/pmbus/pli1209bc.c new file mode 100644 index 000000000..05b4ee35b --- /dev/null +++ b/drivers/hwmon/pmbus/pli1209bc.c @@ -0,0 +1,146 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Hardware monitoring driver for Vicor PLI1209BC Digital Supervisor + * + * Copyright (c) 2022 9elements GmbH + */ + +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/pmbus.h> +#include <linux/regulator/driver.h> +#include "pmbus.h" + +/* + * The capability command is only supported at page 0. Probing the device while + * the page register is set to 1 will falsely enable PEC support. Disable + * capability probing accordingly, since the PLI1209BC does not have any + * additional capabilities. + */ +static struct pmbus_platform_data pli1209bc_plat_data = { + .flags = PMBUS_NO_CAPABILITY, +}; + +static int pli1209bc_read_word_data(struct i2c_client *client, int page, + int phase, int reg) +{ + int data; + + switch (reg) { + /* PMBUS_READ_POUT uses a direct format with R=0 */ + case PMBUS_READ_POUT: + data = pmbus_read_word_data(client, page, phase, reg); + if (data < 0) + return data; + data = sign_extend32(data, 15) * 10; + return clamp_val(data, -32768, 32767) & 0xffff; + /* + * PMBUS_READ_VOUT and PMBUS_READ_TEMPERATURE_1 return invalid data + * when the BCM is turned off. Since it is not possible to return + * ENODATA error, return zero instead. + */ + case PMBUS_READ_VOUT: + case PMBUS_READ_TEMPERATURE_1: + data = pmbus_read_word_data(client, page, phase, + PMBUS_STATUS_WORD); + if (data < 0) + return data; + if (data & PB_STATUS_POWER_GOOD_N) + return 0; + return pmbus_read_word_data(client, page, phase, reg); + default: + return -ENODATA; + } +} + +#if IS_ENABLED(CONFIG_SENSORS_PLI1209BC_REGULATOR) +static const struct regulator_desc pli1209bc_reg_desc = { + .name = "vout2", + .id = 1, + .of_match = of_match_ptr("vout2"), + .regulators_node = of_match_ptr("regulators"), + .ops = &pmbus_regulator_ops, + .type = REGULATOR_VOLTAGE, + .owner = THIS_MODULE, +}; +#endif + +static struct pmbus_driver_info pli1209bc_info = { + .pages = 2, + .format[PSC_VOLTAGE_IN] = direct, + .format[PSC_VOLTAGE_OUT] = direct, + .format[PSC_CURRENT_IN] = direct, + .format[PSC_CURRENT_OUT] = direct, + .format[PSC_POWER] = direct, + .format[PSC_TEMPERATURE] = direct, + .m[PSC_VOLTAGE_IN] = 1, + .b[PSC_VOLTAGE_IN] = 0, + .R[PSC_VOLTAGE_IN] = 1, + .m[PSC_VOLTAGE_OUT] = 1, + .b[PSC_VOLTAGE_OUT] = 0, + .R[PSC_VOLTAGE_OUT] = 1, + .m[PSC_CURRENT_IN] = 1, + .b[PSC_CURRENT_IN] = 0, + .R[PSC_CURRENT_IN] = 3, + .m[PSC_CURRENT_OUT] = 1, + .b[PSC_CURRENT_OUT] = 0, + .R[PSC_CURRENT_OUT] = 2, + .m[PSC_POWER] = 1, + .b[PSC_POWER] = 0, + .R[PSC_POWER] = 1, + .m[PSC_TEMPERATURE] = 1, + .b[PSC_TEMPERATURE] = 0, + .R[PSC_TEMPERATURE] = 0, + /* + * Page 0 sums up all attributes except voltage readings. + * The pli1209 digital supervisor only contains a single BCM, making + * page 0 redundant. + */ + .func[1] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT + | PMBUS_HAVE_IIN | PMBUS_HAVE_IOUT + | PMBUS_HAVE_PIN | PMBUS_HAVE_POUT + | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP + | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_INPUT, + .read_word_data = pli1209bc_read_word_data, +#if IS_ENABLED(CONFIG_SENSORS_PLI1209BC_REGULATOR) + .num_regulators = 1, + .reg_desc = &pli1209bc_reg_desc, +#endif +}; + +static int pli1209bc_probe(struct i2c_client *client) +{ + client->dev.platform_data = &pli1209bc_plat_data; + return pmbus_do_probe(client, &pli1209bc_info); +} + +static const struct i2c_device_id pli1209bc_id[] = { + {"pli1209bc", 0}, + {} +}; + +MODULE_DEVICE_TABLE(i2c, pli1209bc_id); + +#ifdef CONFIG_OF +static const struct of_device_id pli1209bc_of_match[] = { + { .compatible = "vicor,pli1209bc" }, + { }, +}; +MODULE_DEVICE_TABLE(of, pli1209bc_of_match); +#endif + +static struct i2c_driver pli1209bc_driver = { + .driver = { + .name = "pli1209bc", + .of_match_table = of_match_ptr(pli1209bc_of_match), + }, + .probe_new = pli1209bc_probe, + .id_table = pli1209bc_id, +}; + +module_i2c_driver(pli1209bc_driver); + +MODULE_AUTHOR("Marcello Sylvester Bauer <sylv@sylv.io>"); +MODULE_DESCRIPTION("PMBus driver for Vicor PLI1209BC"); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS(PMBUS); |