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hwmon: (pmbus/ltc2978) add support for ltc7841

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Add support for LTC7841. The LTC7841 is a high performance
PolyPhase® single output synchronous boost converter controller.
Multiphase operation reduces input and output capacitor
requirements and allows the use of smaller inductors than the
single-phase equivalent.

The relevant registers in the LTC7841 are similar to the
LTC7880, only reduced by some amount. So it's just a matter of adding
the chip id. The device also doesn't support polling, on top of the
reduced register set, so a separate case for setting the chip info is
added.

Signed-off-by: Mariel Tinaco <Mariel.Tinaco@analog.com>
Message-ID: <20241029013734.293024-4-Mariel.Tinaco@analog.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Mariel Tinaco 2024-10-29 09:37:34 +08:00 committed by Guenter Roeck
parent baf88c49a2
commit 9c1716bc51
2 changed files with 21 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/hwmon/pmbus/Kconfig
View File

@ -224,9 +224,9 @@ config SENSORS_LTC2978_REGULATOR
depends on SENSORS_LTC2978 && REGULATOR
help
If you say yes here you get regulator support for Linear Technology
LTC3880, LTC3883, LTC3884, LTC3886, LTC3887, LTC3889, LTC7880,
LTM4644, LTM4675, LTM4676, LTM4677, LTM4678, LTM4680, LTM4686,
and LTM4700.
LTC3880, LTC3883, LTC3884, LTC3886, LTC3887, LTC3889, LTC7841,
LTC7880, LTM4644, LTM4675, LTM4676, LTM4677, LTM4678, LTM4680,
LTM4686, and LTM4700.
config SENSORS_LTC3815
tristate "Linear Technologies LTC3815"

20
drivers/hwmon/pmbus/ltc2978.c
View File

@ -23,7 +23,8 @@ enum chips {
/* Managers */
ltc2972, ltc2974, ltc2975, ltc2977, ltc2978, ltc2979, ltc2980,
/* Controllers */
ltc3880, ltc3882, ltc3883, ltc3884, ltc3886, ltc3887, ltc3889, ltc7132, ltc7880,
ltc3880, ltc3882, ltc3883, ltc3884, ltc3886, ltc3887, ltc3889, ltc7132,
ltc7841, ltc7880,
/* Modules */
ltm2987, ltm4664, ltm4675, ltm4676, ltm4677, ltm4678, ltm4680, ltm4686,
ltm4700,
@ -50,7 +51,7 @@ enum chips {
#define LTC3880_MFR_CLEAR_PEAKS 0xe3
#define LTC3880_MFR_TEMPERATURE2_PEAK 0xf4
/* LTC3883, LTC3884, LTC3886, LTC3889, LTC7132, LTC7880 */
/* LTC3883, LTC3884, LTC3886, LTC3889, LTC7132, LTC7841 and LTC7880 only */
#define LTC3883_MFR_IIN_PEAK 0xe1
/* LTC2975 only */
@ -80,6 +81,7 @@ enum chips {
#define LTC3887_ID 0x4700
#define LTC3889_ID 0x4900
#define LTC7132_ID 0x4CE0
#define LTC7841_ID 0x40D0
#define LTC7880_ID 0x49E0
#define LTM2987_ID_A 0x8010 /* A/B for two die IDs */
#define LTM2987_ID_B 0x8020
@ -548,6 +550,7 @@ static const struct i2c_device_id ltc2978_id[] = {
{"ltc3887", ltc3887},
{"ltc3889", ltc3889},
{"ltc7132", ltc7132},
{"ltc7841", ltc7841},
{"ltc7880", ltc7880},
{"ltm2987", ltm2987},
{"ltm4664", ltm4664},
@ -654,6 +657,8 @@ static int ltc2978_get_id(struct i2c_client *client)
return ltc3889;
else if (chip_id == LTC7132_ID)
return ltc7132;
else if (chip_id == LTC7841_ID)
return ltc7841;
else if (chip_id == LTC7880_ID)
return ltc7880;
else if (chip_id == LTM2987_ID_A || chip_id == LTM2987_ID_B)
@ -854,6 +859,16 @@ static int ltc2978_probe(struct i2c_client *client)
| PMBUS_HAVE_POUT
| PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
break;
case ltc7841:
data->features |= FEAT_CLEAR_PEAKS;
info->read_word_data = ltc3883_read_word_data;
info->pages = LTC3883_NUM_PAGES;
info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN
| PMBUS_HAVE_STATUS_INPUT
| PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
| PMBUS_HAVE_IOUT
| PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
break;
default:
return -ENODEV;
}
@ -907,6 +922,7 @@ static const struct of_device_id ltc2978_of_match[] = {
{ .compatible = "lltc,ltc3887" },
{ .compatible = "lltc,ltc3889" },
{ .compatible = "lltc,ltc7132" },
{ .compatible = "lltc,ltc7841" },
{ .compatible = "lltc,ltc7880" },
{ .compatible = "lltc,ltm2987" },
{ .compatible = "lltc,ltm4664" },