Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Robert Marko | 815 | 99.76% | 1 | 33.33% |
Rob Herring | 1 | 0.12% | 1 | 33.33% |
Uwe Kleine-König | 1 | 0.12% | 1 | 33.33% |
Total | 817 | 3 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * Driver for Delta DPS920AB PSU * * Copyright (C) 2021 Delta Networks, Inc. * Copyright (C) 2021 Sartura Ltd. */ #include <linux/debugfs.h> #include <linux/i2c.h> #include <linux/module.h> #include <linux/of.h> #include "pmbus.h" struct dps920ab_data { char *mfr_model; char *mfr_id; }; static int dps920ab_read_word_data(struct i2c_client *client, int page, int phase, int reg) { /* * This masks commands which are not supported. * PSU advertises that all features are supported, * in reality that unfortunately is not true. * So enable only those that the datasheet confirms. */ switch (reg) { case PMBUS_FAN_COMMAND_1: case PMBUS_IOUT_OC_WARN_LIMIT: case PMBUS_STATUS_WORD: case PMBUS_READ_VIN: case PMBUS_READ_IIN: case PMBUS_READ_VOUT: case PMBUS_READ_IOUT: case PMBUS_READ_TEMPERATURE_1: case PMBUS_READ_TEMPERATURE_2: case PMBUS_READ_TEMPERATURE_3: case PMBUS_READ_FAN_SPEED_1: case PMBUS_READ_POUT: case PMBUS_READ_PIN: case PMBUS_MFR_VOUT_MIN: case PMBUS_MFR_VOUT_MAX: case PMBUS_MFR_IOUT_MAX: case PMBUS_MFR_POUT_MAX: return pmbus_read_word_data(client, page, phase, reg); default: return -ENXIO; } } static int dps920ab_write_word_data(struct i2c_client *client, int page, int reg, u16 word) { /* * This masks commands which are not supported. * PSU only has one R/W register and that is * for the fan. */ switch (reg) { case PMBUS_FAN_COMMAND_1: return pmbus_write_word_data(client, page, reg, word); default: return -EACCES; } } static struct pmbus_driver_info dps920ab_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_FAN] = linear, .format[PSC_TEMPERATURE] = linear, .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN | PMBUS_HAVE_PIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT | PMBUS_HAVE_POUT | PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 | PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12 | PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP, .read_word_data = dps920ab_read_word_data, .write_word_data = dps920ab_write_word_data, }; static int dps920ab_mfr_id_show(struct seq_file *s, void *data) { struct dps920ab_data *priv = s->private; seq_printf(s, "%s\n", priv->mfr_id); return 0; } DEFINE_SHOW_ATTRIBUTE(dps920ab_mfr_id); static int dps920ab_mfr_model_show(struct seq_file *s, void *data) { struct dps920ab_data *priv = s->private; seq_printf(s, "%s\n", priv->mfr_model); return 0; } DEFINE_SHOW_ATTRIBUTE(dps920ab_mfr_model); static void dps920ab_init_debugfs(struct dps920ab_data *data, struct i2c_client *client) { struct dentry *debugfs_dir; struct dentry *root; root = pmbus_get_debugfs_dir(client); if (!root) return; debugfs_dir = debugfs_create_dir(client->name, root); debugfs_create_file("mfr_id", 0400, debugfs_dir, data, &dps920ab_mfr_id_fops); debugfs_create_file("mfr_model", 0400, debugfs_dir, data, &dps920ab_mfr_model_fops); } static int dps920ab_probe(struct i2c_client *client) { u8 buf[I2C_SMBUS_BLOCK_MAX + 1]; struct dps920ab_data *data; int ret; data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); if (!data) return -ENOMEM; ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, buf); if (ret < 0) { dev_err(&client->dev, "Failed to read Manufacturer ID\n"); return ret; } buf[ret] = '\0'; if (ret != 5 || strncmp(buf, "DELTA", 5)) { buf[ret] = '\0'; dev_err(&client->dev, "Unsupported Manufacturer ID '%s'\n", buf); return -ENODEV; } data->mfr_id = devm_kstrdup(&client->dev, buf, GFP_KERNEL); if (!data->mfr_id) return -ENOMEM; ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, buf); if (ret < 0) { dev_err(&client->dev, "Failed to read Manufacturer Model\n"); return ret; } buf[ret] = '\0'; if (ret != 11 || strncmp(buf, "DPS-920AB", 9)) { dev_err(&client->dev, "Unsupported Manufacturer Model '%s'\n", buf); return -ENODEV; } data->mfr_model = devm_kstrdup(&client->dev, buf, GFP_KERNEL); if (!data->mfr_model) return -ENOMEM; ret = pmbus_do_probe(client, &dps920ab_info); if (ret) return ret; dps920ab_init_debugfs(data, client); return 0; } static const struct of_device_id __maybe_unused dps920ab_of_match[] = { { .compatible = "delta,dps920ab", }, {} }; MODULE_DEVICE_TABLE(of, dps920ab_of_match); static struct i2c_driver dps920ab_driver = { .driver = { .name = "dps920ab", .of_match_table = of_match_ptr(dps920ab_of_match), }, .probe = dps920ab_probe, }; module_i2c_driver(dps920ab_driver); MODULE_AUTHOR("Robert Marko <robert.marko@sartura.hr>"); MODULE_DESCRIPTION("PMBus driver for Delta DPS920AB PSU"); MODULE_LICENSE("GPL"); MODULE_IMPORT_NS(PMBUS);
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