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path: root/drivers/hwmon/pmbus/lm25066.c
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-rw-r--r--drivers/hwmon/pmbus/lm25066.c580
1 files changed, 580 insertions, 0 deletions
diff --git a/drivers/hwmon/pmbus/lm25066.c b/drivers/hwmon/pmbus/lm25066.c
new file mode 100644
index 000000000..09792cd03
--- /dev/null
+++ b/drivers/hwmon/pmbus/lm25066.c
@@ -0,0 +1,580 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Hardware monitoring driver for LM25056 / LM25066 / LM5064 / LM5066
+ *
+ * Copyright (c) 2011 Ericsson AB.
+ * Copyright (c) 2013 Guenter Roeck
+ */
+
+#include <linux/bitops.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/log2.h>
+#include <linux/of_device.h>
+#include "pmbus.h"
+
+enum chips { lm25056, lm25066, lm5064, lm5066, lm5066i };
+
+#define LM25066_READ_VAUX 0xd0
+#define LM25066_MFR_READ_IIN 0xd1
+#define LM25066_MFR_READ_PIN 0xd2
+#define LM25066_MFR_IIN_OC_WARN_LIMIT 0xd3
+#define LM25066_MFR_PIN_OP_WARN_LIMIT 0xd4
+#define LM25066_READ_PIN_PEAK 0xd5
+#define LM25066_CLEAR_PIN_PEAK 0xd6
+#define LM25066_DEVICE_SETUP 0xd9
+#define LM25066_READ_AVG_VIN 0xdc
+#define LM25066_SAMPLES_FOR_AVG 0xdb
+#define LM25066_READ_AVG_VOUT 0xdd
+#define LM25066_READ_AVG_IIN 0xde
+#define LM25066_READ_AVG_PIN 0xdf
+
+#define LM25066_DEV_SETUP_CL BIT(4) /* Current limit */
+
+#define LM25066_SAMPLES_FOR_AVG_MAX 4096
+
+/* LM25056 only */
+
+#define LM25056_VAUX_OV_WARN_LIMIT 0xe3
+#define LM25056_VAUX_UV_WARN_LIMIT 0xe4
+
+#define LM25056_MFR_STS_VAUX_OV_WARN BIT(1)
+#define LM25056_MFR_STS_VAUX_UV_WARN BIT(0)
+
+struct __coeff {
+ short m, b, R;
+};
+
+#define PSC_CURRENT_IN_L (PSC_NUM_CLASSES)
+#define PSC_POWER_L (PSC_NUM_CLASSES + 1)
+
+static const struct __coeff lm25066_coeff[][PSC_NUM_CLASSES + 2] = {
+ [lm25056] = {
+ [PSC_VOLTAGE_IN] = {
+ .m = 16296,
+ .b = 1343,
+ .R = -2,
+ },
+ [PSC_CURRENT_IN] = {
+ .m = 13797,
+ .b = -1833,
+ .R = -2,
+ },
+ [PSC_CURRENT_IN_L] = {
+ .m = 6726,
+ .b = -537,
+ .R = -2,
+ },
+ [PSC_POWER] = {
+ .m = 5501,
+ .b = -2908,
+ .R = -3,
+ },
+ [PSC_POWER_L] = {
+ .m = 26882,
+ .b = -5646,
+ .R = -4,
+ },
+ [PSC_TEMPERATURE] = {
+ .m = 1580,
+ .b = -14500,
+ .R = -2,
+ },
+ },
+ [lm25066] = {
+ [PSC_VOLTAGE_IN] = {
+ .m = 22070,
+ .b = -1800,
+ .R = -2,
+ },
+ [PSC_VOLTAGE_OUT] = {
+ .m = 22070,
+ .b = -1800,
+ .R = -2,
+ },
+ [PSC_CURRENT_IN] = {
+ .m = 13661,
+ .b = -5200,
+ .R = -2,
+ },
+ [PSC_CURRENT_IN_L] = {
+ .m = 6854,
+ .b = -3100,
+ .R = -2,
+ },
+ [PSC_POWER] = {
+ .m = 736,
+ .b = -3300,
+ .R = -2,
+ },
+ [PSC_POWER_L] = {
+ .m = 369,
+ .b = -1900,
+ .R = -2,
+ },
+ [PSC_TEMPERATURE] = {
+ .m = 16,
+ },
+ },
+ [lm5064] = {
+ [PSC_VOLTAGE_IN] = {
+ .m = 4611,
+ .b = -642,
+ .R = -2,
+ },
+ [PSC_VOLTAGE_OUT] = {
+ .m = 4621,
+ .b = 423,
+ .R = -2,
+ },
+ [PSC_CURRENT_IN] = {
+ .m = 10742,
+ .b = 1552,
+ .R = -2,
+ },
+ [PSC_CURRENT_IN_L] = {
+ .m = 5456,
+ .b = 2118,
+ .R = -2,
+ },
+ [PSC_POWER] = {
+ .m = 1204,
+ .b = 8524,
+ .R = -3,
+ },
+ [PSC_POWER_L] = {
+ .m = 612,
+ .b = 11202,
+ .R = -3,
+ },
+ [PSC_TEMPERATURE] = {
+ .m = 16,
+ },
+ },
+ [lm5066] = {
+ [PSC_VOLTAGE_IN] = {
+ .m = 4587,
+ .b = -1200,
+ .R = -2,
+ },
+ [PSC_VOLTAGE_OUT] = {
+ .m = 4587,
+ .b = -2400,
+ .R = -2,
+ },
+ [PSC_CURRENT_IN] = {
+ .m = 10753,
+ .b = -1200,
+ .R = -2,
+ },
+ [PSC_CURRENT_IN_L] = {
+ .m = 5405,
+ .b = -600,
+ .R = -2,
+ },
+ [PSC_POWER] = {
+ .m = 1204,
+ .b = -6000,
+ .R = -3,
+ },
+ [PSC_POWER_L] = {
+ .m = 605,
+ .b = -8000,
+ .R = -3,
+ },
+ [PSC_TEMPERATURE] = {
+ .m = 16,
+ },
+ },
+ [lm5066i] = {
+ [PSC_VOLTAGE_IN] = {
+ .m = 4617,
+ .b = -140,
+ .R = -2,
+ },
+ [PSC_VOLTAGE_OUT] = {
+ .m = 4602,
+ .b = 500,
+ .R = -2,
+ },
+ [PSC_CURRENT_IN] = {
+ .m = 15076,
+ .b = -504,
+ .R = -2,
+ },
+ [PSC_CURRENT_IN_L] = {
+ .m = 7645,
+ .b = 100,
+ .R = -2,
+ },
+ [PSC_POWER] = {
+ .m = 1701,
+ .b = -4000,
+ .R = -3,
+ },
+ [PSC_POWER_L] = {
+ .m = 861,
+ .b = -965,
+ .R = -3,
+ },
+ [PSC_TEMPERATURE] = {
+ .m = 16,
+ },
+ },
+};
+
+struct lm25066_data {
+ int id;
+ u16 rlimit; /* Maximum register value */
+ struct pmbus_driver_info info;
+};
+
+#define to_lm25066_data(x) container_of(x, struct lm25066_data, info)
+
+static int lm25066_read_word_data(struct i2c_client *client, int page,
+ int phase, int reg)
+{
+ const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
+ const struct lm25066_data *data = to_lm25066_data(info);
+ int ret;
+
+ switch (reg) {
+ case PMBUS_VIRT_READ_VMON:
+ ret = pmbus_read_word_data(client, 0, 0xff, LM25066_READ_VAUX);
+ if (ret < 0)
+ break;
+ /* Adjust returned value to match VIN coefficients */
+ switch (data->id) {
+ case lm25056:
+ /* VIN: 6.14 mV VAUX: 293 uV LSB */
+ ret = DIV_ROUND_CLOSEST(ret * 293, 6140);
+ break;
+ case lm25066:
+ /* VIN: 4.54 mV VAUX: 283.2 uV LSB */
+ ret = DIV_ROUND_CLOSEST(ret * 2832, 45400);
+ break;
+ case lm5064:
+ /* VIN: 4.53 mV VAUX: 700 uV LSB */
+ ret = DIV_ROUND_CLOSEST(ret * 70, 453);
+ break;
+ case lm5066:
+ case lm5066i:
+ /* VIN: 2.18 mV VAUX: 725 uV LSB */
+ ret = DIV_ROUND_CLOSEST(ret * 725, 2180);
+ break;
+ }
+ break;
+ case PMBUS_READ_IIN:
+ ret = pmbus_read_word_data(client, 0, 0xff,
+ LM25066_MFR_READ_IIN);
+ break;
+ case PMBUS_READ_PIN:
+ ret = pmbus_read_word_data(client, 0, 0xff,
+ LM25066_MFR_READ_PIN);
+ break;
+ case PMBUS_IIN_OC_WARN_LIMIT:
+ ret = pmbus_read_word_data(client, 0, 0xff,
+ LM25066_MFR_IIN_OC_WARN_LIMIT);
+ break;
+ case PMBUS_PIN_OP_WARN_LIMIT:
+ ret = pmbus_read_word_data(client, 0, 0xff,
+ LM25066_MFR_PIN_OP_WARN_LIMIT);
+ break;
+ case PMBUS_VIRT_READ_VIN_AVG:
+ ret = pmbus_read_word_data(client, 0, 0xff,
+ LM25066_READ_AVG_VIN);
+ break;
+ case PMBUS_VIRT_READ_VOUT_AVG:
+ ret = pmbus_read_word_data(client, 0, 0xff,
+ LM25066_READ_AVG_VOUT);
+ break;
+ case PMBUS_VIRT_READ_IIN_AVG:
+ ret = pmbus_read_word_data(client, 0, 0xff,
+ LM25066_READ_AVG_IIN);
+ break;
+ case PMBUS_VIRT_READ_PIN_AVG:
+ ret = pmbus_read_word_data(client, 0, 0xff,
+ LM25066_READ_AVG_PIN);
+ break;
+ case PMBUS_VIRT_READ_PIN_MAX:
+ ret = pmbus_read_word_data(client, 0, 0xff,
+ LM25066_READ_PIN_PEAK);
+ break;
+ case PMBUS_VIRT_RESET_PIN_HISTORY:
+ ret = 0;
+ break;
+ case PMBUS_VIRT_SAMPLES:
+ ret = pmbus_read_byte_data(client, 0, LM25066_SAMPLES_FOR_AVG);
+ if (ret < 0)
+ break;
+ ret = 1 << ret;
+ break;
+ default:
+ ret = -ENODATA;
+ break;
+ }
+ return ret;
+}
+
+static int lm25056_read_word_data(struct i2c_client *client, int page,
+ int phase, int reg)
+{
+ int ret;
+
+ switch (reg) {
+ case PMBUS_VIRT_VMON_UV_WARN_LIMIT:
+ ret = pmbus_read_word_data(client, 0, 0xff,
+ LM25056_VAUX_UV_WARN_LIMIT);
+ if (ret < 0)
+ break;
+ /* Adjust returned value to match VIN coefficients */
+ ret = DIV_ROUND_CLOSEST(ret * 293, 6140);
+ break;
+ case PMBUS_VIRT_VMON_OV_WARN_LIMIT:
+ ret = pmbus_read_word_data(client, 0, 0xff,
+ LM25056_VAUX_OV_WARN_LIMIT);
+ if (ret < 0)
+ break;
+ /* Adjust returned value to match VIN coefficients */
+ ret = DIV_ROUND_CLOSEST(ret * 293, 6140);
+ break;
+ default:
+ ret = lm25066_read_word_data(client, page, phase, reg);
+ break;
+ }
+ return ret;
+}
+
+static int lm25056_read_byte_data(struct i2c_client *client, int page, int reg)
+{
+ int ret, s;
+
+ switch (reg) {
+ case PMBUS_VIRT_STATUS_VMON:
+ ret = pmbus_read_byte_data(client, 0,
+ PMBUS_STATUS_MFR_SPECIFIC);
+ if (ret < 0)
+ break;
+ s = 0;
+ if (ret & LM25056_MFR_STS_VAUX_UV_WARN)
+ s |= PB_VOLTAGE_UV_WARNING;
+ if (ret & LM25056_MFR_STS_VAUX_OV_WARN)
+ s |= PB_VOLTAGE_OV_WARNING;
+ ret = s;
+ break;
+ default:
+ ret = -ENODATA;
+ break;
+ }
+ return ret;
+}
+
+static int lm25066_write_word_data(struct i2c_client *client, int page, int reg,
+ u16 word)
+{
+ const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
+ const struct lm25066_data *data = to_lm25066_data(info);
+ int ret;
+
+ switch (reg) {
+ case PMBUS_POUT_OP_FAULT_LIMIT:
+ case PMBUS_POUT_OP_WARN_LIMIT:
+ case PMBUS_VOUT_UV_WARN_LIMIT:
+ case PMBUS_OT_FAULT_LIMIT:
+ case PMBUS_OT_WARN_LIMIT:
+ case PMBUS_IIN_OC_FAULT_LIMIT:
+ case PMBUS_VIN_UV_WARN_LIMIT:
+ case PMBUS_VIN_UV_FAULT_LIMIT:
+ case PMBUS_VIN_OV_FAULT_LIMIT:
+ case PMBUS_VIN_OV_WARN_LIMIT:
+ word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit);
+ ret = pmbus_write_word_data(client, 0, reg, word);
+ break;
+ case PMBUS_IIN_OC_WARN_LIMIT:
+ word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit);
+ ret = pmbus_write_word_data(client, 0,
+ LM25066_MFR_IIN_OC_WARN_LIMIT,
+ word);
+ break;
+ case PMBUS_PIN_OP_WARN_LIMIT:
+ word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit);
+ ret = pmbus_write_word_data(client, 0,
+ LM25066_MFR_PIN_OP_WARN_LIMIT,
+ word);
+ break;
+ case PMBUS_VIRT_VMON_UV_WARN_LIMIT:
+ /* Adjust from VIN coefficients (for LM25056) */
+ word = DIV_ROUND_CLOSEST((int)word * 6140, 293);
+ word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit);
+ ret = pmbus_write_word_data(client, 0,
+ LM25056_VAUX_UV_WARN_LIMIT, word);
+ break;
+ case PMBUS_VIRT_VMON_OV_WARN_LIMIT:
+ /* Adjust from VIN coefficients (for LM25056) */
+ word = DIV_ROUND_CLOSEST((int)word * 6140, 293);
+ word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit);
+ ret = pmbus_write_word_data(client, 0,
+ LM25056_VAUX_OV_WARN_LIMIT, word);
+ break;
+ case PMBUS_VIRT_RESET_PIN_HISTORY:
+ ret = pmbus_write_byte(client, 0, LM25066_CLEAR_PIN_PEAK);
+ break;
+ case PMBUS_VIRT_SAMPLES:
+ word = clamp_val(word, 1, LM25066_SAMPLES_FOR_AVG_MAX);
+ ret = pmbus_write_byte_data(client, 0, LM25066_SAMPLES_FOR_AVG,
+ ilog2(word));
+ break;
+ default:
+ ret = -ENODATA;
+ break;
+ }
+ return ret;
+}
+
+#if IS_ENABLED(CONFIG_SENSORS_LM25066_REGULATOR)
+static const struct regulator_desc lm25066_reg_desc[] = {
+ PMBUS_REGULATOR("vout", 0),
+};
+#endif
+
+static const struct i2c_device_id lm25066_id[] = {
+ {"lm25056", lm25056},
+ {"lm25066", lm25066},
+ {"lm5064", lm5064},
+ {"lm5066", lm5066},
+ {"lm5066i", lm5066i},
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, lm25066_id);
+
+static const struct of_device_id __maybe_unused lm25066_of_match[] = {
+ { .compatible = "ti,lm25056", .data = (void *)lm25056, },
+ { .compatible = "ti,lm25066", .data = (void *)lm25066, },
+ { .compatible = "ti,lm5064", .data = (void *)lm5064, },
+ { .compatible = "ti,lm5066", .data = (void *)lm5066, },
+ { .compatible = "ti,lm5066i", .data = (void *)lm5066i, },
+ { },
+};
+MODULE_DEVICE_TABLE(of, lm25066_of_match);
+
+static int lm25066_probe(struct i2c_client *client)
+{
+ int config;
+ u32 shunt;
+ struct lm25066_data *data;
+ struct pmbus_driver_info *info;
+ const struct __coeff *coeff;
+ const struct of_device_id *of_id;
+ const struct i2c_device_id *i2c_id;
+
+ if (!i2c_check_functionality(client->adapter,
+ I2C_FUNC_SMBUS_READ_BYTE_DATA))
+ return -ENODEV;
+
+ data = devm_kzalloc(&client->dev, sizeof(struct lm25066_data),
+ GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ config = i2c_smbus_read_byte_data(client, LM25066_DEVICE_SETUP);
+ if (config < 0)
+ return config;
+
+ i2c_id = i2c_match_id(lm25066_id, client);
+
+ of_id = of_match_device(lm25066_of_match, &client->dev);
+ if (of_id && (unsigned long)of_id->data != i2c_id->driver_data)
+ dev_notice(&client->dev, "Device mismatch: %s in device tree, %s detected\n",
+ of_id->name, i2c_id->name);
+
+ data->id = i2c_id->driver_data;
+ info = &data->info;
+
+ info->pages = 1;
+ info->format[PSC_VOLTAGE_IN] = direct;
+ info->format[PSC_VOLTAGE_OUT] = direct;
+ info->format[PSC_CURRENT_IN] = direct;
+ info->format[PSC_TEMPERATURE] = direct;
+ info->format[PSC_POWER] = direct;
+
+ info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VMON
+ | PMBUS_HAVE_PIN | PMBUS_HAVE_IIN | PMBUS_HAVE_STATUS_INPUT
+ | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP | PMBUS_HAVE_SAMPLES;
+
+ if (data->id == lm25056) {
+ info->func[0] |= PMBUS_HAVE_STATUS_VMON;
+ info->read_word_data = lm25056_read_word_data;
+ info->read_byte_data = lm25056_read_byte_data;
+ data->rlimit = 0x0fff;
+ } else {
+ info->func[0] |= PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
+ info->read_word_data = lm25066_read_word_data;
+ data->rlimit = 0x0fff;
+ }
+ info->write_word_data = lm25066_write_word_data;
+
+ coeff = &lm25066_coeff[data->id][0];
+ info->m[PSC_TEMPERATURE] = coeff[PSC_TEMPERATURE].m;
+ info->b[PSC_TEMPERATURE] = coeff[PSC_TEMPERATURE].b;
+ info->R[PSC_TEMPERATURE] = coeff[PSC_TEMPERATURE].R;
+ info->m[PSC_VOLTAGE_IN] = coeff[PSC_VOLTAGE_IN].m;
+ info->b[PSC_VOLTAGE_IN] = coeff[PSC_VOLTAGE_IN].b;
+ info->R[PSC_VOLTAGE_IN] = coeff[PSC_VOLTAGE_IN].R;
+ info->m[PSC_VOLTAGE_OUT] = coeff[PSC_VOLTAGE_OUT].m;
+ info->b[PSC_VOLTAGE_OUT] = coeff[PSC_VOLTAGE_OUT].b;
+ info->R[PSC_VOLTAGE_OUT] = coeff[PSC_VOLTAGE_OUT].R;
+ info->R[PSC_CURRENT_IN] = coeff[PSC_CURRENT_IN].R;
+ info->R[PSC_POWER] = coeff[PSC_POWER].R;
+ if (config & LM25066_DEV_SETUP_CL) {
+ info->m[PSC_CURRENT_IN] = coeff[PSC_CURRENT_IN_L].m;
+ info->b[PSC_CURRENT_IN] = coeff[PSC_CURRENT_IN_L].b;
+ info->m[PSC_POWER] = coeff[PSC_POWER_L].m;
+ info->b[PSC_POWER] = coeff[PSC_POWER_L].b;
+ } else {
+ info->m[PSC_CURRENT_IN] = coeff[PSC_CURRENT_IN].m;
+ info->b[PSC_CURRENT_IN] = coeff[PSC_CURRENT_IN].b;
+ info->m[PSC_POWER] = coeff[PSC_POWER].m;
+ info->b[PSC_POWER] = coeff[PSC_POWER].b;
+ }
+
+ /*
+ * Values in the TI datasheets are normalized for a 1mOhm sense
+ * resistor; assume that unless DT specifies a value explicitly.
+ */
+ if (of_property_read_u32(client->dev.of_node, "shunt-resistor-micro-ohms", &shunt))
+ shunt = 1000;
+
+ info->m[PSC_CURRENT_IN] = info->m[PSC_CURRENT_IN] * shunt / 1000;
+ info->m[PSC_POWER] = info->m[PSC_POWER] * shunt / 1000;
+
+#if IS_ENABLED(CONFIG_SENSORS_LM25066_REGULATOR)
+ /* LM25056 doesn't support OPERATION */
+ if (data->id != lm25056) {
+ info->num_regulators = ARRAY_SIZE(lm25066_reg_desc);
+ info->reg_desc = lm25066_reg_desc;
+ }
+#endif
+
+ return pmbus_do_probe(client, info);
+}
+
+/* This is the driver that will be inserted */
+static struct i2c_driver lm25066_driver = {
+ .driver = {
+ .name = "lm25066",
+ .of_match_table = of_match_ptr(lm25066_of_match),
+ },
+ .probe_new = lm25066_probe,
+ .id_table = lm25066_id,
+};
+
+module_i2c_driver(lm25066_driver);
+
+MODULE_AUTHOR("Guenter Roeck");
+MODULE_DESCRIPTION("PMBus driver for LM25066 and compatible chips");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(PMBUS);
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-18 16:05:11 +0000