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Diffstat (limited to 'drivers/hwmon/pmbus/lm25066.c')
-rw-r--r--drivers/hwmon/pmbus/lm25066.c267
1 files changed, 154 insertions, 113 deletions
diff --git a/drivers/hwmon/pmbus/lm25066.c b/drivers/hwmon/pmbus/lm25066.c
index a3d912cd3b8d..dd7275a67a0a 100644
--- a/drivers/hwmon/pmbus/lm25066.c
+++ b/drivers/hwmon/pmbus/lm25066.c
@@ -1,22 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
- * Hardware monitoring driver for LM25056 / LM25063 / LM25066 / LM5064 / LM5066
+ * Hardware monitoring driver for LM25056 / LM25066 / LM5064 / LM5066
*
* Copyright (c) 2011 Ericsson AB.
* Copyright (c) 2013 Guenter Roeck
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/bitops.h>
@@ -26,9 +13,11 @@
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/i2c.h>
+#include <linux/log2.h>
+#include <linux/of.h>
#include "pmbus.h"
-enum chips { lm25056, lm25063, lm25066, lm5064, lm5066 };
+enum chips { lm25056, lm25066, lm5064, lm5066, lm5066i };
#define LM25066_READ_VAUX 0xd0
#define LM25066_MFR_READ_IIN 0xd1
@@ -39,12 +28,15 @@ enum chips { lm25056, lm25063, lm25066, lm5064, lm5066 };
#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
@@ -53,11 +45,6 @@ enum chips { lm25056, lm25063, lm25066, lm5064, lm5066 };
#define LM25056_MFR_STS_VAUX_OV_WARN BIT(1)
#define LM25056_MFR_STS_VAUX_UV_WARN BIT(0)
-/* LM25063 only */
-
-#define LM25063_READ_VOUT_MAX 0xe5
-#define LM25063_READ_VOUT_MIN 0xe6
-
struct __coeff {
short m, b, R;
};
@@ -65,26 +52,31 @@ struct __coeff {
#define PSC_CURRENT_IN_L (PSC_NUM_CLASSES)
#define PSC_POWER_L (PSC_NUM_CLASSES + 1)
-static struct __coeff lm25066_coeff[5][PSC_NUM_CLASSES + 2] = {
+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] = {
@@ -96,114 +88,137 @@ static struct __coeff lm25066_coeff[5][PSC_NUM_CLASSES + 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 = 6852,
+ .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,
},
},
- [lm25063] = {
+ [lm5064] = {
[PSC_VOLTAGE_IN] = {
- .m = 16000,
+ .m = 4611,
+ .b = -642,
.R = -2,
},
[PSC_VOLTAGE_OUT] = {
- .m = 16000,
+ .m = 4621,
+ .b = 423,
.R = -2,
},
[PSC_CURRENT_IN] = {
- .m = 10000,
+ .m = 10742,
+ .b = 1552,
.R = -2,
},
[PSC_CURRENT_IN_L] = {
- .m = 10000,
+ .m = 5456,
+ .b = 2118,
.R = -2,
},
[PSC_POWER] = {
- .m = 5000,
+ .m = 1204,
+ .b = 8524,
.R = -3,
},
[PSC_POWER_L] = {
- .m = 5000,
+ .m = 612,
+ .b = 11202,
.R = -3,
},
[PSC_TEMPERATURE] = {
- .m = 15596,
- .R = -3,
+ .m = 16,
},
},
- [lm5064] = {
+ [lm5066] = {
[PSC_VOLTAGE_IN] = {
- .m = 4611,
+ .m = 4587,
+ .b = -1200,
.R = -2,
},
[PSC_VOLTAGE_OUT] = {
- .m = 4621,
+ .m = 4587,
+ .b = -2400,
.R = -2,
},
[PSC_CURRENT_IN] = {
- .m = 10742,
+ .m = 10753,
+ .b = -1200,
.R = -2,
},
[PSC_CURRENT_IN_L] = {
- .m = 5456,
+ .m = 5405,
+ .b = -600,
.R = -2,
},
[PSC_POWER] = {
.m = 1204,
+ .b = -6000,
.R = -3,
},
[PSC_POWER_L] = {
- .m = 612,
+ .m = 605,
+ .b = -8000,
.R = -3,
},
[PSC_TEMPERATURE] = {
.m = 16,
},
},
- [lm5066] = {
+ [lm5066i] = {
[PSC_VOLTAGE_IN] = {
- .m = 4587,
+ .m = 4617,
+ .b = -140,
.R = -2,
},
[PSC_VOLTAGE_OUT] = {
- .m = 4587,
+ .m = 4602,
+ .b = 500,
.R = -2,
},
[PSC_CURRENT_IN] = {
- .m = 10753,
+ .m = 15076,
+ .b = -504,
.R = -2,
},
[PSC_CURRENT_IN_L] = {
- .m = 5405,
+ .m = 7645,
+ .b = 100,
.R = -2,
},
[PSC_POWER] = {
- .m = 1204,
+ .m = 1701,
+ .b = -4000,
.R = -3,
},
[PSC_POWER_L] = {
- .m = 605,
+ .m = 861,
+ .b = -965,
.R = -3,
},
[PSC_TEMPERATURE] = {
@@ -220,7 +235,8 @@ struct lm25066_data {
#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 reg)
+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);
@@ -228,7 +244,7 @@ static int lm25066_read_word_data(struct i2c_client *client, int page, int reg)
switch (reg) {
case PMBUS_VIRT_READ_VMON:
- ret = pmbus_read_word_data(client, 0, LM25066_READ_VAUX);
+ ret = pmbus_read_word_data(client, 0, 0xff, LM25066_READ_VAUX);
if (ret < 0)
break;
/* Adjust returned value to match VIN coefficients */
@@ -237,10 +253,6 @@ static int lm25066_read_word_data(struct i2c_client *client, int page, int reg)
/* VIN: 6.14 mV VAUX: 293 uV LSB */
ret = DIV_ROUND_CLOSEST(ret * 293, 6140);
break;
- case lm25063:
- /* VIN: 6.25 mV VAUX: 200.0 uV LSB */
- ret = DIV_ROUND_CLOSEST(ret * 20, 625);
- break;
case lm25066:
/* VIN: 4.54 mV VAUX: 283.2 uV LSB */
ret = DIV_ROUND_CLOSEST(ret * 2832, 45400);
@@ -250,75 +262,72 @@ static int lm25066_read_word_data(struct i2c_client *client, int page, int reg)
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, LM25066_MFR_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, LM25066_MFR_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,
+ 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,
+ 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, LM25066_READ_AVG_VIN);
+ 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, LM25066_READ_AVG_VOUT);
+ 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, LM25066_READ_AVG_IIN);
+ 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, LM25066_READ_AVG_PIN);
+ 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, LM25066_READ_PIN_PEAK);
+ ret = pmbus_read_word_data(client, 0, 0xff,
+ LM25066_READ_PIN_PEAK);
break;
case PMBUS_VIRT_RESET_PIN_HISTORY:
ret = 0;
break;
- default:
- ret = -ENODATA;
- break;
- }
- return ret;
-}
-
-static int lm25063_read_word_data(struct i2c_client *client, int page, int reg)
-{
- int ret;
-
- switch (reg) {
- case PMBUS_VIRT_READ_VOUT_MAX:
- ret = pmbus_read_word_data(client, 0, LM25063_READ_VOUT_MAX);
- break;
- case PMBUS_VIRT_READ_VOUT_MIN:
- ret = pmbus_read_word_data(client, 0, LM25063_READ_VOUT_MIN);
+ 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 = lm25066_read_word_data(client, page, reg);
+ ret = -ENODATA;
break;
}
return ret;
}
-static int lm25056_read_word_data(struct i2c_client *client, int page, int reg)
+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,
+ ret = pmbus_read_word_data(client, 0, 0xff,
LM25056_VAUX_UV_WARN_LIMIT);
if (ret < 0)
break;
@@ -326,7 +335,7 @@ static int lm25056_read_word_data(struct i2c_client *client, int page, int reg)
ret = DIV_ROUND_CLOSEST(ret * 293, 6140);
break;
case PMBUS_VIRT_VMON_OV_WARN_LIMIT:
- ret = pmbus_read_word_data(client, 0,
+ ret = pmbus_read_word_data(client, 0, 0xff,
LM25056_VAUX_OV_WARN_LIMIT);
if (ret < 0)
break;
@@ -334,7 +343,7 @@ static int lm25056_read_word_data(struct i2c_client *client, int page, int reg)
ret = DIV_ROUND_CLOSEST(ret * 293, 6140);
break;
default:
- ret = lm25066_read_word_data(client, page, reg);
+ ret = lm25066_read_word_data(client, page, phase, reg);
break;
}
return ret;
@@ -384,21 +393,18 @@ static int lm25066_write_word_data(struct i2c_client *client, int page, int reg,
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);
- pmbus_clear_cache(client);
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);
- pmbus_clear_cache(client);
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);
- pmbus_clear_cache(client);
break;
case PMBUS_VIRT_VMON_UV_WARN_LIMIT:
/* Adjust from VIN coefficients (for LM25056) */
@@ -406,7 +412,6 @@ static int lm25066_write_word_data(struct i2c_client *client, int page, int reg,
word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit);
ret = pmbus_write_word_data(client, 0,
LM25056_VAUX_UV_WARN_LIMIT, word);
- pmbus_clear_cache(client);
break;
case PMBUS_VIRT_VMON_OV_WARN_LIMIT:
/* Adjust from VIN coefficients (for LM25056) */
@@ -414,11 +419,15 @@ static int lm25066_write_word_data(struct i2c_client *client, int page, int reg,
word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit);
ret = pmbus_write_word_data(client, 0,
LM25056_VAUX_OV_WARN_LIMIT, word);
- pmbus_clear_cache(client);
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;
@@ -426,13 +435,39 @@ static int lm25066_write_word_data(struct i2c_client *client, int page, int reg,
return ret;
}
-static int lm25066_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
+#if IS_ENABLED(CONFIG_SENSORS_LM25066_REGULATOR)
+static const struct regulator_desc lm25066_reg_desc[] = {
+ PMBUS_REGULATOR_ONE_NODE("vout"),
+};
+#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;
- struct __coeff *coeff;
+ const struct __coeff *coeff;
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_READ_BYTE_DATA))
@@ -447,7 +482,8 @@ static int lm25066_probe(struct i2c_client *client,
if (config < 0)
return config;
- data->id = id->driver_data;
+ data->id = (enum chips)(unsigned long)i2c_get_match_data(client);
+
info = &data->info;
info->pages = 1;
@@ -459,18 +495,13 @@ static int lm25066_probe(struct i2c_client *client,
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_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 if (data->id == lm25063) {
- info->func[0] |= PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
- | PMBUS_HAVE_POUT;
- info->read_word_data = lm25063_read_word_data;
- data->rlimit = 0xffff;
} else {
info->func[0] |= PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
info->read_word_data = lm25066_read_word_data;
@@ -488,39 +519,48 @@ static int lm25066_probe(struct i2c_client *client,
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->b[PSC_CURRENT_IN] = coeff[PSC_CURRENT_IN].b;
info->R[PSC_CURRENT_IN] = coeff[PSC_CURRENT_IN].R;
- info->b[PSC_POWER] = coeff[PSC_POWER].b;
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;
}
- return pmbus_do_probe(client, id, info);
-}
-
-static const struct i2c_device_id lm25066_id[] = {
- {"lm25056", lm25056},
- {"lm25063", lm25063},
- {"lm25066", lm25066},
- {"lm5064", lm5064},
- {"lm5066", lm5066},
- { }
-};
+ /*
+ * 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
-MODULE_DEVICE_TABLE(i2c, lm25066_id);
+ 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 = lm25066_probe,
- .remove = pmbus_do_remove,
.id_table = lm25066_id,
};
@@ -529,3 +569,4 @@ 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 (git 2.34.1) at 2025-12-26 04:10:32 +0000