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hwmon: (pmbus/ltc2978) add support for ltm4673

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Add support for LTM4673. The LTM4673 is a quad output, dual 12A and dual
5A, switching mode DC/DC step-down μModule regulator integrated with
4-channel power system manager.

This adds only the chip id, the checks for the manufacturer special id,
and the relevant attributes for the device's pmbus_driver_info.
The device does not support clear peaks.

Signed-off-by: Cedric Encarnacion <cedricjustine.encarnacion@analog.com>
Link: https://lore.kernel.org/r/20250124-ltm4673-v1-2-a2c6aa37c903@analog.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Cedric Encarnacion 2025-01-24 23:23:06 +08:00 committed by Guenter Roeck
parent 8dfd7e0826
commit 68b6f95861
3 changed files with 33 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
Documentation/hwmon/ltc2978.rst
View File

@ -151,6 +151,14 @@ Supported chips:
Datasheet: https://www.analog.com/en/products/ltm4644
* Linear Technology LTM4673
Prefix: 'ltm4673'
Addresses scanned: -
Datasheet: https://www.analog.com/en/products/ltm4673
* Linear Technology LTM4675
Prefix: 'ltm4675'

4
drivers/hwmon/pmbus/Kconfig
View File

@ -234,8 +234,8 @@ config SENSORS_LTC2978_REGULATOR
help
If you say yes here you get regulator support for Linear Technology
LTC3880, LTC3883, LTC3884, LTC3886, LTC3887, LTC3889, LTC7841,
LTC7880, LTM4644, LTM4675, LTM4676, LTM4677, LTM4678, LTM4680,
LTM4686, and LTM4700.
LTC7880, LTM4644, LTM4673, LTM4675, LTM4676, LTM4677, LTM4678,
LTM4680, LTM4686, and LTM4700.
config SENSORS_LTC3815
tristate "Linear Technologies LTC3815"

25
drivers/hwmon/pmbus/ltc2978.c
View File

@ -26,8 +26,8 @@ enum chips {
ltc3880, ltc3882, ltc3883, ltc3884, ltc3886, ltc3887, ltc3889, ltc7132,
ltc7841, ltc7880,
/* Modules */
ltm2987, ltm4664, ltm4675, ltm4676, ltm4677, ltm4678, ltm4680, ltm4686,
ltm4700,
ltm2987, ltm4664, ltm4673, ltm4675, ltm4676, ltm4677, ltm4678, ltm4680,
ltm4686, ltm4700,
};
/* Common for all chips */
@ -86,6 +86,8 @@ enum chips {
#define LTM2987_ID_A 0x8010 /* A/B for two die IDs */
#define LTM2987_ID_B 0x8020
#define LTM4664_ID 0x4120
#define LTM4673_ID_REV1 0x0230
#define LTM4673_ID 0x4480
#define LTM4675_ID 0x47a0
#define LTM4676_ID_REV1 0x4400
#define LTM4676_ID_REV2 0x4480
@ -554,6 +556,7 @@ static const struct i2c_device_id ltc2978_id[] = {
{"ltc7880", ltc7880},
{"ltm2987", ltm2987},
{"ltm4664", ltm4664},
{"ltm4673", ltm4673},
{"ltm4675", ltm4675},
{"ltm4676", ltm4676},
{"ltm4677", ltm4677},
@ -665,6 +668,8 @@ static int ltc2978_get_id(struct i2c_client *client)
return ltm2987;
else if (chip_id == LTM4664_ID)
return ltm4664;
else if (chip_id == LTM4673_ID || chip_id == LTM4673_ID_REV1)
return ltm4673;
else if (chip_id == LTM4675_ID)
return ltm4675;
else if (chip_id == LTM4676_ID_REV1 || chip_id == LTM4676_ID_REV2 ||
@ -869,6 +874,21 @@ static int ltc2978_probe(struct i2c_client *client)
| PMBUS_HAVE_IOUT
| PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
break;
case ltm4673:
data->features |= FEAT_NEEDS_POLLING;
info->read_word_data = ltc2975_read_word_data;
info->pages = LTC2974_NUM_PAGES;
info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT
| PMBUS_HAVE_TEMP2;
for (i = 0; i < info->pages; i++) {
info->func[i] |= PMBUS_HAVE_IIN
| PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT
| PMBUS_HAVE_PIN
| PMBUS_HAVE_POUT
| PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
}
break;
default:
return -ENODEV;
}
@ -926,6 +946,7 @@ static const struct of_device_id ltc2978_of_match[] = {
{ .compatible = "lltc,ltc7880" },
{ .compatible = "lltc,ltm2987" },
{ .compatible = "lltc,ltm4664" },
{ .compatible = "lltc,ltm4673" },
{ .compatible = "lltc,ltm4675" },
{ .compatible = "lltc,ltm4676" },
{ .compatible = "lltc,ltm4677" },