From 2b8adc2e79d90702ee04169dad529d2d628b926e Mon Sep 17 00:00:00 2001 From: Mariel Tinaco Date: Fri, 25 Oct 2024 02:52:43 +0800 Subject: [PATCH] hwmon: (pmbus/ltc2978) add support for ltc7841 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 identical to the LTC7880. So it's just a matter of adding the chip id. Signed-off-by: Mariel Tinaco --- drivers/hwmon/pmbus/Kconfig | 6 +++--- drivers/hwmon/pmbus/ltc2978.c | 20 ++++++++++++++++++-- 2 files changed, 21 insertions(+), 5 deletions(-) diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig index e92ecd672c00ef..2aef9189c9fabd 100644 --- a/drivers/hwmon/pmbus/Kconfig +++ b/drivers/hwmon/pmbus/Kconfig @@ -215,9 +215,9 @@ 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" diff --git a/drivers/hwmon/pmbus/ltc2978.c b/drivers/hwmon/pmbus/ltc2978.c index 6d2592731ba3dc..531792af945dbf 100644 --- a/drivers/hwmon/pmbus/ltc2978.c +++ b/drivers/hwmon/pmbus/ltc2978.c @@ -23,7 +23,8 @@ enum chips { /* Managers */ ltc2972, ltc2974, ltc2975, ltc2977, ltc2978, ltc2979, ltc2980, /* Controllers */ - ltc3880, ltc3882, ltc3883, ltc3884, ltc3886, ltc3887, ltc3889, ltc7880, + ltc3880, ltc3882, ltc3883, ltc3884, ltc3886, ltc3887, ltc3889, 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 and LTC7880 only */ +/* LTC3883, LTC3884, LTC3886, LTC3889, LTC7841 and LTC7880 only */ #define LTC3883_MFR_IIN_PEAK 0xe1 @@ -82,6 +83,7 @@ enum chips { #define LTM2987_ID_A 0x8010 /* A/B for two die IDs */ #define LTM2987_ID_B 0x8020 #define LTC3889_ID 0x4900 +#define LTC7841_ID 0x40D0 #define LTC7880_ID 0x49E0 #define LTM4664_ID 0x4120 #define LTM4675_ID 0x47a0 @@ -547,6 +549,7 @@ static const struct i2c_device_id ltc2978_id[] = { {"ltc3886", ltc3886}, {"ltc3887", ltc3887}, {"ltc3889", ltc3889}, + {"ltc7841", ltc7841}, {"ltc7880", ltc7880}, {"ltm2987", ltm2987}, {"ltm4664", ltm4664}, @@ -651,6 +654,8 @@ static int ltc2978_get_id(struct i2c_client *client) return ltc3887; else if (chip_id == LTC3889_ID) return ltc3889; + 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) @@ -850,6 +855,16 @@ 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; } @@ -902,6 +917,7 @@ static const struct of_device_id ltc2978_of_match[] = { { .compatible = "lltc,ltc3886" }, { .compatible = "lltc,ltc3887" }, { .compatible = "lltc,ltc3889" }, + { .compatible = "lltc,ltc7841" }, { .compatible = "lltc,ltc7880" }, { .compatible = "lltc,ltm2987" }, { .compatible = "lltc,ltm4664" },