| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jerome Brunet | 1579 | 99.94% | 1 | 50.00% |
| Guenter Roeck | 1 | 0.06% | 1 | 50.00% |
| Total | 1580 | 2 |
// SPDX-License-Identifier: GPL-2.0 // // Copyright (c) 2024 BayLibre, SAS. // Author: Jerome Brunet <jbrunet@baylibre.com> #include <linux/bitfield.h> #include <linux/debugfs.h> #include <linux/err.h> #include <linux/hwmon-sysfs.h> #include <linux/i2c.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/module.h> #include "pmbus.h" #define TPS25990_READ_VAUX 0xd0 #define TPS25990_READ_VIN_MIN 0xd1 #define TPS25990_READ_VIN_PEAK 0xd2 #define TPS25990_READ_IIN_PEAK 0xd4 #define TPS25990_READ_PIN_PEAK 0xd5 #define TPS25990_READ_TEMP_AVG 0xd6 #define TPS25990_READ_TEMP_PEAK 0xd7 #define TPS25990_READ_VOUT_MIN 0xda #define TPS25990_READ_VIN_AVG 0xdc #define TPS25990_READ_VOUT_AVG 0xdd #define TPS25990_READ_IIN_AVG 0xde #define TPS25990_READ_PIN_AVG 0xdf #define TPS25990_VIREF 0xe0 #define TPS25990_PK_MIN_AVG 0xea #define PK_MIN_AVG_RST_PEAK BIT(7) #define PK_MIN_AVG_RST_AVG BIT(6) #define PK_MIN_AVG_RST_MIN BIT(5) #define PK_MIN_AVG_AVG_CNT GENMASK(2, 0) #define TPS25990_MFR_WRITE_PROTECT 0xf8 #define TPS25990_UNLOCKED BIT(7) #define TPS25990_8B_SHIFT 2 #define TPS25990_VIN_OVF_NUM 525100 #define TPS25990_VIN_OVF_DIV 10163 #define TPS25990_VIN_OVF_OFF 155 #define TPS25990_IIN_OCF_NUM 953800 #define TPS25990_IIN_OCF_DIV 129278 #define TPS25990_IIN_OCF_OFF 157 #define PK_MIN_AVG_RST_MASK (PK_MIN_AVG_RST_PEAK | \ PK_MIN_AVG_RST_AVG | \ PK_MIN_AVG_RST_MIN) /* * Arbitrary default Rimon value: 1kOhm * This correspond to an overcurrent limit of 55A, close to the specified limit * of un-stacked TPS25990 and makes further calculation easier to setup in * sensor.conf, if necessary */ #define TPS25990_DEFAULT_RIMON 1000000000 static void tps25990_set_m(int *m, u32 rimon) { u64 val = ((u64)*m) * rimon; /* Make sure m fits the s32 type */ *m = DIV_ROUND_CLOSEST_ULL(val, 1000000); } static int tps25990_mfr_write_protect_set(struct i2c_client *client, u8 protect) { u8 val; switch (protect) { case 0: val = 0xa2; break; case PB_WP_ALL: val = 0x0; break; default: return -EINVAL; } return pmbus_write_byte_data(client, -1, TPS25990_MFR_WRITE_PROTECT, val); } static int tps25990_mfr_write_protect_get(struct i2c_client *client) { int ret = pmbus_read_byte_data(client, -1, TPS25990_MFR_WRITE_PROTECT); if (ret < 0) return ret; return (ret & TPS25990_UNLOCKED) ? 0 : PB_WP_ALL; } static int tps25990_read_word_data(struct i2c_client *client, int page, int phase, int reg) { int ret; switch (reg) { case PMBUS_VIRT_READ_VIN_MAX: ret = pmbus_read_word_data(client, page, phase, TPS25990_READ_VIN_PEAK); break; case PMBUS_VIRT_READ_VIN_MIN: ret = pmbus_read_word_data(client, page, phase, TPS25990_READ_VIN_MIN); break; case PMBUS_VIRT_READ_VIN_AVG: ret = pmbus_read_word_data(client, page, phase, TPS25990_READ_VIN_AVG); break; case PMBUS_VIRT_READ_VOUT_MIN: ret = pmbus_read_word_data(client, page, phase, TPS25990_READ_VOUT_MIN); break; case PMBUS_VIRT_READ_VOUT_AVG: ret = pmbus_read_word_data(client, page, phase, TPS25990_READ_VOUT_AVG); break; case PMBUS_VIRT_READ_IIN_AVG: ret = pmbus_read_word_data(client, page, phase, TPS25990_READ_IIN_AVG); break; case PMBUS_VIRT_READ_IIN_MAX: ret = pmbus_read_word_data(client, page, phase, TPS25990_READ_IIN_PEAK); break; case PMBUS_VIRT_READ_TEMP_AVG: ret = pmbus_read_word_data(client, page, phase, TPS25990_READ_TEMP_AVG); break; case PMBUS_VIRT_READ_TEMP_MAX: ret = pmbus_read_word_data(client, page, phase, TPS25990_READ_TEMP_PEAK); break; case PMBUS_VIRT_READ_PIN_AVG: ret = pmbus_read_word_data(client, page, phase, TPS25990_READ_PIN_AVG); break; case PMBUS_VIRT_READ_PIN_MAX: ret = pmbus_read_word_data(client, page, phase, TPS25990_READ_PIN_PEAK); break; case PMBUS_VIRT_READ_VMON: ret = pmbus_read_word_data(client, page, phase, TPS25990_READ_VAUX); break; case PMBUS_VIN_UV_WARN_LIMIT: case PMBUS_VIN_UV_FAULT_LIMIT: case PMBUS_VIN_OV_WARN_LIMIT: case PMBUS_VOUT_UV_WARN_LIMIT: case PMBUS_IIN_OC_WARN_LIMIT: case PMBUS_OT_WARN_LIMIT: case PMBUS_OT_FAULT_LIMIT: case PMBUS_PIN_OP_WARN_LIMIT: /* * These registers provide an 8 bits value instead of a * 10bits one. Just shifting twice the register value is * enough to make the sensor type conversion work, even * if the datasheet provides different m, b and R for * those. */ ret = pmbus_read_word_data(client, page, phase, reg); if (ret < 0) break; ret <<= TPS25990_8B_SHIFT; break; case PMBUS_VIN_OV_FAULT_LIMIT: ret = pmbus_read_word_data(client, page, phase, reg); if (ret < 0) break; ret = DIV_ROUND_CLOSEST(ret * TPS25990_VIN_OVF_NUM, TPS25990_VIN_OVF_DIV); ret += TPS25990_VIN_OVF_OFF; break; case PMBUS_IIN_OC_FAULT_LIMIT: /* * VIREF directly sets the over-current limit at which the eFuse * will turn the FET off and trigger a fault. Expose it through * this generic property instead of a manufacturer specific one. */ ret = pmbus_read_byte_data(client, page, TPS25990_VIREF); if (ret < 0) break; ret = DIV_ROUND_CLOSEST(ret * TPS25990_IIN_OCF_NUM, TPS25990_IIN_OCF_DIV); ret += TPS25990_IIN_OCF_OFF; break; case PMBUS_VIRT_SAMPLES: ret = pmbus_read_byte_data(client, page, TPS25990_PK_MIN_AVG); if (ret < 0) break; ret = 1 << FIELD_GET(PK_MIN_AVG_AVG_CNT, ret); break; case PMBUS_VIRT_RESET_TEMP_HISTORY: case PMBUS_VIRT_RESET_VIN_HISTORY: case PMBUS_VIRT_RESET_IIN_HISTORY: case PMBUS_VIRT_RESET_PIN_HISTORY: case PMBUS_VIRT_RESET_VOUT_HISTORY: ret = 0; break; default: ret = -ENODATA; break; } return ret; } static int tps25990_write_word_data(struct i2c_client *client, int page, int reg, u16 value) { int ret; switch (reg) { case PMBUS_VIN_UV_WARN_LIMIT: case PMBUS_VIN_UV_FAULT_LIMIT: case PMBUS_VIN_OV_WARN_LIMIT: case PMBUS_VOUT_UV_WARN_LIMIT: case PMBUS_IIN_OC_WARN_LIMIT: case PMBUS_OT_WARN_LIMIT: case PMBUS_OT_FAULT_LIMIT: case PMBUS_PIN_OP_WARN_LIMIT: value >>= TPS25990_8B_SHIFT; value = clamp_val(value, 0, 0xff); ret = pmbus_write_word_data(client, page, reg, value); break; case PMBUS_VIN_OV_FAULT_LIMIT: value -= TPS25990_VIN_OVF_OFF; value = DIV_ROUND_CLOSEST(((unsigned int)value) * TPS25990_VIN_OVF_DIV, TPS25990_VIN_OVF_NUM); value = clamp_val(value, 0, 0xf); ret = pmbus_write_word_data(client, page, reg, value); break; case PMBUS_IIN_OC_FAULT_LIMIT: value -= TPS25990_IIN_OCF_OFF; value = DIV_ROUND_CLOSEST(((unsigned int)value) * TPS25990_IIN_OCF_DIV, TPS25990_IIN_OCF_NUM); value = clamp_val(value, 0, 0x3f); ret = pmbus_write_byte_data(client, page, TPS25990_VIREF, value); break; case PMBUS_VIRT_SAMPLES: value = clamp_val(value, 1, 1 << PK_MIN_AVG_AVG_CNT); value = ilog2(value); ret = pmbus_update_byte_data(client, page, TPS25990_PK_MIN_AVG, PK_MIN_AVG_AVG_CNT, FIELD_PREP(PK_MIN_AVG_AVG_CNT, value)); break; case PMBUS_VIRT_RESET_TEMP_HISTORY: case PMBUS_VIRT_RESET_VIN_HISTORY: case PMBUS_VIRT_RESET_IIN_HISTORY: case PMBUS_VIRT_RESET_PIN_HISTORY: case PMBUS_VIRT_RESET_VOUT_HISTORY: /* * TPS25990 has history resets based on MIN/AVG/PEAK instead of per * sensor type. Exposing this quirk in hwmon is not desirable so * reset MIN, AVG and PEAK together. Even is there effectively only * one reset, which resets everything, expose the 5 entries so * userspace is not required map a sensor type to another to trigger * a reset */ ret = pmbus_update_byte_data(client, 0, TPS25990_PK_MIN_AVG, PK_MIN_AVG_RST_MASK, PK_MIN_AVG_RST_MASK); break; default: ret = -ENODATA; break; } return ret; } static int tps25990_read_byte_data(struct i2c_client *client, int page, int reg) { int ret; switch (reg) { case PMBUS_WRITE_PROTECT: ret = tps25990_mfr_write_protect_get(client); break; default: ret = -ENODATA; break; } return ret; } static int tps25990_write_byte_data(struct i2c_client *client, int page, int reg, u8 byte) { int ret; switch (reg) { case PMBUS_WRITE_PROTECT: ret = tps25990_mfr_write_protect_set(client, byte); break; default: ret = -ENODATA; break; } return ret; } #if IS_ENABLED(CONFIG_SENSORS_TPS25990_REGULATOR) static const struct regulator_desc tps25990_reg_desc[] = { PMBUS_REGULATOR_ONE_NODE("vout"), }; #endif static const struct pmbus_driver_info tps25990_base_info = { .pages = 1, .format[PSC_VOLTAGE_IN] = direct, .m[PSC_VOLTAGE_IN] = 5251, .b[PSC_VOLTAGE_IN] = 0, .R[PSC_VOLTAGE_IN] = -2, .format[PSC_VOLTAGE_OUT] = direct, .m[PSC_VOLTAGE_OUT] = 5251, .b[PSC_VOLTAGE_OUT] = 0, .R[PSC_VOLTAGE_OUT] = -2, .format[PSC_TEMPERATURE] = direct, .m[PSC_TEMPERATURE] = 140, .b[PSC_TEMPERATURE] = 32100, .R[PSC_TEMPERATURE] = -2, /* * Current and Power measurement depends on the ohm value * of Rimon. m is multiplied by 1000 below to have an integer * and -3 is added to R to compensate. */ .format[PSC_CURRENT_IN] = direct, .m[PSC_CURRENT_IN] = 9538, .b[PSC_CURRENT_IN] = 0, .R[PSC_CURRENT_IN] = -6, .format[PSC_POWER] = direct, .m[PSC_POWER] = 4901, .b[PSC_POWER] = 0, .R[PSC_POWER] = -7, .func[0] = (PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_VMON | PMBUS_HAVE_IIN | PMBUS_HAVE_PIN | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP | PMBUS_HAVE_SAMPLES), .read_word_data = tps25990_read_word_data, .write_word_data = tps25990_write_word_data, .read_byte_data = tps25990_read_byte_data, .write_byte_data = tps25990_write_byte_data, #if IS_ENABLED(CONFIG_SENSORS_TPS25990_REGULATOR) .reg_desc = tps25990_reg_desc, .num_regulators = ARRAY_SIZE(tps25990_reg_desc), #endif }; static const struct i2c_device_id tps25990_i2c_id[] = { { "tps25990" }, {} }; MODULE_DEVICE_TABLE(i2c, tps25990_i2c_id); static const struct of_device_id tps25990_of_match[] = { { .compatible = "ti,tps25990" }, {} }; MODULE_DEVICE_TABLE(of, tps25990_of_match); static int tps25990_probe(struct i2c_client *client) { struct device *dev = &client->dev; struct pmbus_driver_info *info; u32 rimon = TPS25990_DEFAULT_RIMON; int ret; ret = device_property_read_u32(dev, "ti,rimon-micro-ohms", &rimon); if (ret < 0 && ret != -EINVAL) return dev_err_probe(dev, ret, "failed to get rimon\n"); info = devm_kmemdup(dev, &tps25990_base_info, sizeof(*info), GFP_KERNEL); if (!info) return -ENOMEM; /* Adapt the current and power scale for each instance */ tps25990_set_m(&info->m[PSC_CURRENT_IN], rimon); tps25990_set_m(&info->m[PSC_POWER], rimon); return pmbus_do_probe(client, info); } static struct i2c_driver tps25990_driver = { .driver = { .name = "tps25990", .of_match_table = tps25990_of_match, }, .probe = tps25990_probe, .id_table = tps25990_i2c_id, }; module_i2c_driver(tps25990_driver); MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>"); MODULE_DESCRIPTION("PMBUS driver for TPS25990 eFuse"); MODULE_LICENSE("GPL"); MODULE_IMPORT_NS("PMBUS");
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