diff options
Diffstat (limited to 'drivers/hwmon/pmbus')
| -rw-r--r-- | drivers/hwmon/pmbus/Kconfig | 36 | ||||
| -rw-r--r-- | drivers/hwmon/pmbus/Makefile | 4 | ||||
| -rw-r--r-- | drivers/hwmon/pmbus/lm25066.c | 2 | ||||
| -rw-r--r-- | drivers/hwmon/pmbus/ltc4286.c | 4 | ||||
| -rw-r--r-- | drivers/hwmon/pmbus/mp2856.c | 8 | ||||
| -rw-r--r-- | drivers/hwmon/pmbus/mp2891.c | 600 | ||||
| -rw-r--r-- | drivers/hwmon/pmbus/mp2993.c | 261 | ||||
| -rw-r--r-- | drivers/hwmon/pmbus/mp5920.c | 90 | ||||
| -rw-r--r-- | drivers/hwmon/pmbus/mp9941.c | 319 |
9 files changed, 1317 insertions, 7 deletions
diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig index 08e82c457356..a4f02cad92fd 100644 --- a/drivers/hwmon/pmbus/Kconfig +++ b/drivers/hwmon/pmbus/Kconfig @@ -337,6 +337,15 @@ config SENSORS_MP2888 This driver can also be built as a module. If so, the module will be called mp2888. +config SENSORS_MP2891 + tristate "MPS MP2891" + help + If you say yes here you get hardware monitoring support for MPS + MP2891 Dual Loop Digital Multi-Phase Controller. + + This driver can also be built as a module. If so, the module will + be called mp2891. + config SENSORS_MP2975 tristate "MPS MP2975" help @@ -346,6 +355,15 @@ config SENSORS_MP2975 This driver can also be built as a module. If so, the module will be called mp2975. +config SENSORS_MP2993 + tristate "MPS MP2993" + help + If you say yes here you get hardware monitoring support for MPS + MP2993 Dual Loop Digital Multi-Phase Controller. + + This driver can also be built as a module. If so, the module will + be called mp2993. + config SENSORS_MP2975_REGULATOR depends on SENSORS_MP2975 && REGULATOR bool "Regulator support for MPS MP2975" @@ -362,6 +380,15 @@ config SENSORS_MP5023 This driver can also be built as a module. If so, the module will be called mp5023. +config SENSORS_MP5920 + tristate "MPS MP5920" + help + If you say yes here you get hardware monitoring support for Monolithic + MP5920. + + This driver can also be built as a module. If so, the module will + be called mp5920. + config SENSORS_MP5990 tristate "MPS MP5990" help @@ -371,6 +398,15 @@ config SENSORS_MP5990 This driver can also be built as a module. If so, the module will be called mp5990. +config SENSORS_MP9941 + tristate "MPS MP9941" + help + If you say yes here you get hardware monitoring support for MPS + MP9941. + + This driver can also be built as a module. If so, the module will + be called mp9941. + config SENSORS_MPQ7932_REGULATOR bool "Regulator support for MPQ7932" depends on SENSORS_MPQ7932 && REGULATOR diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile index 2279b3327bbf..d00bcc758b97 100644 --- a/drivers/hwmon/pmbus/Makefile +++ b/drivers/hwmon/pmbus/Makefile @@ -36,9 +36,13 @@ obj-$(CONFIG_SENSORS_MAX34440) += max34440.o obj-$(CONFIG_SENSORS_MAX8688) += max8688.o obj-$(CONFIG_SENSORS_MP2856) += mp2856.o obj-$(CONFIG_SENSORS_MP2888) += mp2888.o +obj-$(CONFIG_SENSORS_MP2891) += mp2891.o obj-$(CONFIG_SENSORS_MP2975) += mp2975.o +obj-$(CONFIG_SENSORS_MP2993) += mp2993.o obj-$(CONFIG_SENSORS_MP5023) += mp5023.o +obj-$(CONFIG_SENSORS_MP5920) += mp5920.o obj-$(CONFIG_SENSORS_MP5990) += mp5990.o +obj-$(CONFIG_SENSORS_MP9941) += mp9941.o obj-$(CONFIG_SENSORS_MPQ7932) += mpq7932.o obj-$(CONFIG_SENSORS_MPQ8785) += mpq8785.o obj-$(CONFIG_SENSORS_PLI1209BC) += pli1209bc.o diff --git a/drivers/hwmon/pmbus/lm25066.c b/drivers/hwmon/pmbus/lm25066.c index cfffa4cdc0df..c36c124d1a2d 100644 --- a/drivers/hwmon/pmbus/lm25066.c +++ b/drivers/hwmon/pmbus/lm25066.c @@ -17,7 +17,7 @@ #include <linux/of.h> #include "pmbus.h" -enum chips { lm25056 = 1, lm25066, lm5064, lm5066, lm5066i }; +enum chips { lm25056, lm25066, lm5064, lm5066, lm5066i }; #define LM25066_READ_VAUX 0xd0 #define LM25066_MFR_READ_IIN 0xd1 diff --git a/drivers/hwmon/pmbus/ltc4286.c b/drivers/hwmon/pmbus/ltc4286.c index 9e7ceeb7e789..aabd0bcdfeee 100644 --- a/drivers/hwmon/pmbus/ltc4286.c +++ b/drivers/hwmon/pmbus/ltc4286.c @@ -58,8 +58,8 @@ static struct pmbus_driver_info ltc4286_info = { }; static const struct i2c_device_id ltc4286_id[] = { - { "ltc4286", 0 }, - { "ltc4287", 1 }, + { "ltc4286", }, + { "ltc4287", }, {} }; MODULE_DEVICE_TABLE(i2c, ltc4286_id); diff --git a/drivers/hwmon/pmbus/mp2856.c b/drivers/hwmon/pmbus/mp2856.c index 6969350f5d7d..41bb86667091 100644 --- a/drivers/hwmon/pmbus/mp2856.c +++ b/drivers/hwmon/pmbus/mp2856.c @@ -46,7 +46,7 @@ #define MP2856_PAGE_NUM 2 -enum chips { mp2856 = 1, mp2857 }; +enum chips { mp2856, mp2857 }; static const int mp2856_max_phases[][MP2856_PAGE_NUM] = { [mp2856] = { MP2856_MAX_PHASE_RAIL1, MP2856_MAX_PHASE_RAIL2 }, @@ -66,7 +66,6 @@ struct mp2856_data { int vout_format[MP2856_PAGE_NUM]; int curr_sense_gain[MP2856_PAGE_NUM]; int max_phases[MP2856_PAGE_NUM]; - enum chips chip_id; }; #define to_mp2856_data(x) container_of(x, struct mp2856_data, info) @@ -397,6 +396,7 @@ static int mp2856_probe(struct i2c_client *client) { struct pmbus_driver_info *info; struct mp2856_data *data; + enum chips chip_id; int ret; data = devm_kzalloc(&client->dev, sizeof(struct mp2856_data), @@ -404,9 +404,9 @@ static int mp2856_probe(struct i2c_client *client) if (!data) return -ENOMEM; - data->chip_id = (enum chips)(uintptr_t)i2c_get_match_data(client); + chip_id = (kernel_ulong_t)i2c_get_match_data(client); - memcpy(data->max_phases, mp2856_max_phases[data->chip_id], + memcpy(data->max_phases, mp2856_max_phases[chip_id], sizeof(data->max_phases)); memcpy(&data->info, &mp2856_info, sizeof(*info)); diff --git a/drivers/hwmon/pmbus/mp2891.c b/drivers/hwmon/pmbus/mp2891.c new file mode 100644 index 000000000000..bb28b15a9103 --- /dev/null +++ b/drivers/hwmon/pmbus/mp2891.c @@ -0,0 +1,600 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Hardware monitoring driver for MPS Multi-phase Digital VR Controllers(MP2891) + */ + +#include <linux/bitfield.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include "pmbus.h" + +/* + * Vender specific registers, the register MFR_SVI3_IOUT_PRT(0x65), + * MFR_VOUT_LOOP_CTRL(0xBD), READ_PIN_EST(0x94)and READ_IIN_EST(0x95) + * redefine the standard PMBUS register. The MFR_SVI3_IOUT_PRT(0x65) + * is used to identify the iout scale and the MFR_VOUT_LOOP_CTRL(0xBD) + * is used to identify the vout scale. The READ_PIN_EST(0x94) is used + * to read input power per rail. The MP2891 does not have standard + * READ_IIN register(0x89), the iin telemetry can be obtained through + * the vendor redefined register READ_IIN_EST(0x95). + */ +#define MFR_VOUT_LOOP_CTRL 0xBD +#define READ_PIN_EST 0x94 +#define READ_IIN_EST 0x95 +#define MFR_SVI3_IOUT_PRT 0x65 + +#define MP2891_TEMP_LIMIT_OFFSET 40 +#define MP2891_PIN_LIMIT_UINT 2 +#define MP2891_IOUT_LIMIT_UINT 8 +#define MP2891_IOUT_SCALE_DIV 32 +#define MP2891_VOUT_SCALE_DIV 100 +#define MP2891_OVUV_DELTA_SCALE 50 +#define MP2891_OV_LIMIT_SCALE 20 +#define MP2891_UV_LIMIT_SCALE 5 + +#define MP2891_PAGE_NUM 2 + +#define MP2891_RAIL1_FUNC (PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | \ + PMBUS_HAVE_IOUT | PMBUS_HAVE_TEMP | \ + PMBUS_HAVE_POUT | PMBUS_HAVE_PIN | \ + PMBUS_HAVE_IIN | PMBUS_HAVE_STATUS_VOUT | \ + PMBUS_HAVE_STATUS_IOUT | \ + PMBUS_HAVE_STATUS_INPUT | \ + PMBUS_HAVE_STATUS_TEMP) + +#define MP2891_RAIL2_FUNC (PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT | \ + PMBUS_HAVE_TEMP | PMBUS_HAVE_POUT | \ + PMBUS_HAVE_PIN | PMBUS_HAVE_IIN | \ + PMBUS_HAVE_STATUS_VOUT | \ + PMBUS_HAVE_STATUS_IOUT | \ + PMBUS_HAVE_STATUS_INPUT | \ + PMBUS_HAVE_STATUS_TEMP) + +struct mp2891_data { + struct pmbus_driver_info info; + int vout_scale[MP2891_PAGE_NUM]; + int iout_scale[MP2891_PAGE_NUM]; +}; + +#define to_mp2891_data(x) container_of(x, struct mp2891_data, info) + +/* Converts a LINEAR11 value to DIRECT format */ +static u16 mp2891_reg2data_linear11(u16 word) +{ + s16 exponent; + s32 mantissa; + s64 val; + + exponent = ((s16)word) >> 11; + mantissa = ((s16)((word & 0x7ff) << 5)) >> 5; + val = mantissa; + + if (exponent >= 0) + val <<= exponent; + else + val >>= -exponent; + + return val; +} + +static int +mp2891_identify_vout_scale(struct i2c_client *client, struct pmbus_driver_info *info, + int page) +{ + struct mp2891_data *data = to_mp2891_data(info); + int ret; + + ret = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page); + if (ret < 0) + return ret; + + ret = i2c_smbus_read_word_data(client, MFR_VOUT_LOOP_CTRL); + if (ret < 0) + return ret; + + /* + * The output voltage is equal to the READ_VOUT(0x8B) register value multiplied + * by vout_scale. + * Obtain vout scale from the register MFR_VOUT_LOOP_CTRL, bits 15-14,bit 13. + * If MFR_VOUT_LOOP_CTRL[13] = 1, the vout scale is below: + * 2.5mV/LSB + * If MFR_VOUT_LOOP_CTRL[13] = 0, the vout scale is decided by + * MFR_VOUT_LOOP_CTRL[15:14]: + * 00b - 6.25mV/LSB, 01b - 5mV/LSB, 10b - 2mV/LSB, 11b - 1mV + */ + if (ret & GENMASK(13, 13)) { + data->vout_scale[page] = 250; + } else { + ret = FIELD_GET(GENMASK(15, 14), ret); + if (ret == 0) + data->vout_scale[page] = 625; + else if (ret == 1) + data->vout_scale[page] = 500; + else if (ret == 2) + data->vout_scale[page] = 200; + else + data->vout_scale[page] = 100; + } + + return 0; +} + +static int +mp2891_identify_iout_scale(struct i2c_client *client, struct pmbus_driver_info *info, + int page) +{ + struct mp2891_data *data = to_mp2891_data(info); + int ret; + + ret = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page); + if (ret < 0) + return ret; + + ret = i2c_smbus_read_word_data(client, MFR_SVI3_IOUT_PRT); + if (ret < 0) + return ret; + + /* + * The output current is equal to the READ_IOUT(0x8C) register value + * multiplied by iout_scale. + * Obtain iout_scale from the register MFR_SVI3_IOUT_PRT[2:0]. + * The value is selected as below: + * 000b - 1A/LSB, 001b - (1/32)A/LSB, 010b - (1/16)A/LSB, + * 011b - (1/8)A/LSB, 100b - (1/4)A/LSB, 101b - (1/2)A/LSB + * 110b - 1A/LSB, 111b - 2A/LSB + */ + switch (ret & GENMASK(2, 0)) { + case 0: + case 6: + data->iout_scale[page] = 32; + break; + case 1: + data->iout_scale[page] = 1; + break; + case 2: + data->iout_scale[page] = 2; + break; + case 3: + data->iout_scale[page] = 4; + break; + case 4: + data->iout_scale[page] = 8; + break; + case 5: + data->iout_scale[page] = 16; + break; + default: + data->iout_scale[page] = 64; + break; + } + + return 0; +} + +static int mp2891_identify(struct i2c_client *client, struct pmbus_driver_info *info) +{ + int ret; + + /* Identify vout scale for rail 1. */ + ret = mp2891_identify_vout_scale(client, info, 0); + if (ret < 0) + return ret; + + /* Identify vout scale for rail 2. */ + ret = mp2891_identify_vout_scale(client, info, 1); + if (ret < 0) + return ret; + + /* Identify iout scale for rail 1. */ + ret = mp2891_identify_iout_scale(client, info, 0); + if (ret < 0) + return ret; + + /* Identify iout scale for rail 2. */ + return mp2891_identify_iout_scale(client, info, 1); +} + +static int mp2891_read_byte_data(struct i2c_client *client, int page, int reg) +{ + int ret; + + switch (reg) { + case PMBUS_VOUT_MODE: + /* + * The MP2891 does not follow standard PMBus protocol completely, the + * PMBUS_VOUT_MODE(0x20) in MP2891 is reserved and 0x00 is always + * returned when the register is read. But the calculation of vout in + * this driver is based on direct format. As a result, the format of + * vout is enforced to direct. + */ + ret = PB_VOUT_MODE_DIRECT; + break; + default: + ret = -ENODATA; + break; + } + + return ret; +} + +static int mp2891_read_word_data(struct i2c_client *client, int page, + int phase, int reg) +{ + const struct pmbus_driver_info *info = pmbus_get_driver_info(client); + struct mp2891_data *data = to_mp2891_data(info); + int ret; + + switch (reg) { + case PMBUS_READ_VIN: + ret = pmbus_read_word_data(client, page, phase, reg); + if (ret < 0) + return ret; + + ret = ret & GENMASK(9, 0); + break; + case PMBUS_READ_IIN: + /* + * The MP2891 does not have standard PMBUS_READ_IIN register(0x89), + * the iin telemetry can be obtained through the vender redefined + * register READ_IIN_EST(0x95). The MP2891 PMBUS_READ_IIN register + * is linear11 format, But the pout scale is set to 1A/Lsb(using + * r/m/b scale). As a result, the iin read from MP2891 should be + * calculated to A, then return the result to pmbus core. + */ + ret = pmbus_read_word_data(client, page, phase, READ_IIN_EST); + if (ret < 0) + return ret; + + ret = mp2891_reg2data_linear11(ret); + break; + case PMBUS_READ_PIN: + /* + * The MP2891 has standard PMBUS_READ_PIN register(0x97), but this + * is not used to read the input power per rail. The input power + * per rail is read through the vender redefined register + * READ_PIN_EST(0x94). The MP2891 PMBUS_READ_PIN register is linear11 + * format, But the pout scale is set to 1W/Lsb(using r/m/b scale). + * As a result, the pin read from MP2891 should be calculated to W, + * then return the result to pmbus core. + */ + ret = pmbus_read_word_data(client, page, phase, READ_PIN_EST); + if (ret < 0) + return ret; + + ret = mp2891_reg2data_linear11(ret); + break; + case PMBUS_READ_POUT: + /* + * The MP2891 PMBUS_READ_POUT register is linear11 format, and the + * exponent is not a constant value. But the pout scale is set to + * 1W/Lsb(using r/m/b scale). As a result, the pout read from MP2891 + * should be calculated to W, then return the result to pmbus core. + */ + ret = pmbus_read_word_data(client, page, phase, reg); + if (ret < 0) + return ret; + + ret = mp2891_reg2data_linear11(ret); + break; + case PMBUS_READ_VOUT: + case PMBUS_VOUT_UV_WARN_LIMIT: + ret = pmbus_read_word_data(client, page, phase, reg); + if (ret < 0) + return ret; + + ret = DIV_ROUND_CLOSEST(ret * data->vout_scale[page], MP2891_VOUT_SCALE_DIV); + break; + case PMBUS_READ_IOUT: + ret = pmbus_read_word_data(client, page, phase, reg); + if (ret < 0) + return ret; + + ret = DIV_ROUND_CLOSEST((ret & GENMASK(10, 0)) * data->iout_scale[page], + MP2891_IOUT_SCALE_DIV); + break; + case PMBUS_OT_FAULT_LIMIT: + case PMBUS_OT_WARN_LIMIT: + /* + * The scale of MP2891 PMBUS_OT_FAULT_LIMIT and PMBUS_OT_WARN_LIMIT + * is 1°C/LSB and they have 40°C offset. + */ + ret = pmbus_read_word_data(client, page, phase, reg); + if (ret < 0) + return ret; + + ret = (ret & GENMASK(7, 0)) - MP2891_TEMP_LIMIT_OFFSET; + break; + case PMBUS_VIN_OV_FAULT_LIMIT: + /* + * The MP2891 PMBUS_VIN_OV_FAULT_LIMIT scale is 125mV/Lsb. + * but the vin scale is set to 31.25mV/Lsb(using r/m/b scale). + * As a result, the limit value should be multiplied by 4. + */ + ret = pmbus_read_word_data(client, page, phase, reg); + if (ret < 0) + return ret; + + ret = (ret & GENMASK(7, 0)) * 4; + break; + case PMBUS_VOUT_UV_FAULT_LIMIT: + ret = pmbus_read_word_data(client, page, phase, reg); + if (ret < 0) + return ret; + + if (FIELD_GET(GENMASK(11, 8), ret)) + ret = FIELD_GET(GENMASK(7, 0), ret) * MP2891_UV_LIMIT_SCALE - + (FIELD_GET(GENMASK(11, 8), ret) + 1) * MP2891_OVUV_DELTA_SCALE; + else + ret = FIELD_GET(GENMASK(7, 0), ret) * MP2891_UV_LIMIT_SCALE; + + ret = ret < 0 ? 0 : ret; + break; + case PMBUS_VOUT_OV_FAULT_LIMIT: + ret = pmbus_read_word_data(client, page, phase, reg); + if (ret < 0) + return ret; + + if (FIELD_GET(GENMASK(11, 8), ret)) + ret = FIELD_GET(GENMASK(7, 0), ret) * MP2891_OV_LIMIT_SCALE + + (FIELD_GET(GENMASK(11, 8), ret) + 1) * MP2891_OVUV_DELTA_SCALE; + else + ret = FIELD_GET(GENMASK(7, 0), ret) * MP2891_OV_LIMIT_SCALE; + break; + case PMBUS_IOUT_OC_WARN_LIMIT: + case PMBUS_IOUT_OC_FAULT_LIMIT: + ret = pmbus_read_word_data(client, page, phase, reg); + if (ret < 0) + return ret; + + ret = DIV_ROUND_CLOSEST((ret & GENMASK(7, 0)) * data->iout_scale[page] * + MP2891_IOUT_LIMIT_UINT, MP2891_IOUT_SCALE_DIV); + break; + case PMBUS_IIN_OC_WARN_LIMIT: + /* + * The scale of PMBUS_IIN_OC_WARN_LIMIT is 0.5A/Lsb, but the iin scale + * is set to 1A/Lsb(using r/m/b scale), so the word data should be + * divided by 2. + */ + ret = pmbus_read_word_data(client, 0, phase, reg); + if (ret < 0) + return ret; + + ret = DIV_ROUND_CLOSEST((ret & GENMASK(9, 0)), 2); + break; + case PMBUS_PIN_OP_WARN_LIMIT: + /* + * The scale of PMBUS_PIN_OP_WARN_LIMIT is 2W/Lsb, but the pin scale + * is set to 1W/Lsb(using r/m/b scale), so the word data should be + * multiplied by 2. + */ + ret = pmbus_read_word_data(client, 0, phase, reg); + if (ret < 0) + return ret; + + ret = (ret & GENMASK(9, 0)) * MP2891_PIN_LIMIT_UINT; + break; + case PMBUS_READ_TEMPERATURE_1: + case PMBUS_VIN_UV_FAULT_LIMIT: + case PMBUS_VIN_UV_WARN_LIMIT: + ret = -ENODATA; + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static int mp2891_write_word_data(struct i2c_client *client, int page, int reg, + u16 word) +{ + const struct pmbus_driver_info *info = pmbus_get_driver_info(client); + struct mp2891_data *data = to_mp2891_data(info); + int ret; + + switch (reg) { + case PMBUS_VOUT_UV_WARN_LIMIT: + ret = pmbus_write_word_data(client, page, reg, + DIV_ROUND_CLOSEST(word * MP2891_VOUT_SCALE_DIV, + data->vout_scale[page])); + break; + case PMBUS_VOUT_UV_FAULT_LIMIT: + /* + * The PMBUS_VOUT_UV_FAULT_LIMIT[7:0] is the limit value, and bit8-bit15 + * should not be changed. + */ + ret = pmbus_read_word_data(client, page, 0xff, reg); + if (ret < 0) + return ret; + + if (FIELD_GET(GENMASK(11, 8), ret)) + ret = pmbus_write_word_data(client, page, reg, + (ret & ~GENMASK(7, 0)) | + FIELD_PREP(GENMASK(7, 0), + DIV_ROUND_CLOSEST(word + + (FIELD_GET(GENMASK(11, 8), ret) + 1) * + MP2891_OVUV_DELTA_SCALE, + MP2891_UV_LIMIT_SCALE))); + else + ret = pmbus_write_word_data(client, page, reg, + (ret & ~GENMASK(7, 0)) | + FIELD_PREP(GENMASK(7, 0), + DIV_ROUND_CLOSEST(word, + MP2891_UV_LIMIT_SCALE))); + break; + case PMBUS_VOUT_OV_FAULT_LIMIT: + /* + * The PMBUS_VOUT_OV_FAULT_LIMIT[7:0] is the limit value, and bit8-bit15 + * should not be changed. + */ + ret = pmbus_read_word_data(client, page, 0xff, reg); + if (ret < 0) + return ret; + + if (FIELD_GET(GENMASK(11, 8), ret)) + ret = pmbus_write_word_data(client, page, reg, + (ret & ~GENMASK(7, 0)) | + FIELD_PREP(GENMASK(7, 0), + DIV_ROUND_CLOSEST(word - + (FIELD_GET(GENMASK(11, 8), ret) + 1) * + MP2891_OVUV_DELTA_SCALE, + MP2891_OV_LIMIT_SCALE))); + else + ret = pmbus_write_word_data(client, page, reg, + (ret & ~GENMASK(7, 0)) | + FIELD_PREP(GENMASK(7, 0), + DIV_ROUND_CLOSEST(word, + MP2891_OV_LIMIT_SCALE))); + break; + case PMBUS_VIN_OV_FAULT_LIMIT: + /* + * The PMBUS_VIN_OV_FAULT_LIMIT[7:0] is the limit value, and bit8-bit15 + * should not be changed. The scale of PMBUS_VIN_OV_FAULT_LIMIT is 125mV/Lsb, + * but the vin scale is set to 31.25mV/Lsb(using r/m/b scale), so the word data + * should be divided by 4. + */ + ret = pmbus_read_word_data(client, page, 0xff, reg); + if (ret < 0) + return ret; + + ret = pmbus_write_word_data(client, page, reg, + (ret & ~GENMASK(7, 0)) | + FIELD_PREP(GENMASK(7, 0), + DIV_ROUND_CLOSEST(word, 4))); + break; + case PMBUS_OT_FAULT_LIMIT: + case PMBUS_OT_WARN_LIMIT: + /* + * The scale of MP2891 PMBUS_OT_FAULT_LIMIT and PMBUS_OT_WARN_LIMIT + * have 40°C offset. The bit0-bit7 is the limit value, and bit8-bit15 + * should not be changed. + */ + ret = pmbus_read_word_data(client, page, 0xff, reg); + if (ret < 0) + return ret; + + ret = pmbus_write_word_data(client, page, reg, + (ret & ~GENMASK(7, 0)) | + FIELD_PREP(GENMASK(7, 0), word + MP2891_TEMP_LIMIT_OFFSET)); + break; + case PMBUS_IOUT_OC_WARN_LIMIT: + case PMBUS_IOUT_OC_FAULT_LIMIT: + ret = pmbus_write_word_data(client, page, reg, + DIV_ROUND_CLOSEST(word * MP2891_IOUT_SCALE_DIV, + MP2891_IOUT_LIMIT_UINT * + data->iout_scale[page])); + break; + case PMBUS_IIN_OC_WARN_LIMIT: + /* + * The scale of PMBUS_IIN_OC_WARN_LIMIT is 0.5A/Lsb, but the iin scale + * is set to 1A/Lsb(using r/m/b scale), so the word data should be + * multiplied by 2. + */ + ret = pmbus_write_word_data(client, page, reg, word * 2); + break; + case PMBUS_PIN_OP_WARN_LIMIT: + /* + * The scale of PMBUS_PIN_OP_WARN_LIMIT is 2W/Lsb, but the pin scale + * is set to 1W/Lsb(using r/m/b scale), so the word data should be + * divided by 2. + */ + ret = pmbus_write_word_data(client, page, reg, + DIV_ROUND_CLOSEST(word, MP2891_PIN_LIMIT_UINT)); + break; + case PMBUS_VIN_UV_FAULT_LIMIT: + case PMBUS_VIN_UV_WARN_LIMIT: + ret = -ENODATA; + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static const struct pmbus_driver_info mp2891_info = { + .pages = MP2891_PAGE_NUM, + .format[PSC_VOLTAGE_IN] = direct, + .format[PSC_CURRENT_IN] = direct, + .format[PSC_CURRENT_OUT] = direct, + .format[PSC_TEMPERATURE] = direct, + .format[PSC_POWER] = direct, + .format[PSC_VOLTAGE_OUT] = direct, + + /* set vin scale 31.25mV/Lsb */ + .m[PSC_VOLTAGE_IN] = 32, + .R[PSC_VOLTAGE_IN] = 0, + .b[PSC_VOLTAGE_IN] = 0, + + /* set temp scale 1000m°C/Lsb */ + .m[PSC_TEMPERATURE] = 1, + .R[PSC_TEMPERATURE] = 0, + .b[PSC_TEMPERATURE] = 0, + + .m[PSC_CURRENT_IN] = 1, + .R[PSC_CURRENT_IN] = 0, + .b[PSC_CURRENT_IN] = 0, + + .m[PSC_CURRENT_OUT] = 1, + .R[PSC_CURRENT_OUT] = 0, + .b[PSC_CURRENT_OUT] = 0, + + .m[PSC_POWER] = 1, + .R[PSC_POWER] = 0, + .b[PSC_POWER] = 0, + + .m[PSC_VOLTAGE_OUT] = 1, + .R[PSC_VOLTAGE_OUT] = 3, + .b[PSC_VOLTAGE_OUT] = 0, + + .func[0] = MP2891_RAIL1_FUNC, + .func[1] = MP2891_RAIL2_FUNC, + .read_word_data = mp2891_read_word_data, + .write_word_data = mp2891_write_word_data, + .read_byte_data = mp2891_read_byte_data, + .identify = mp2891_identify, +}; + +static int mp2891_probe(struct i2c_client *client) +{ + struct mp2891_data *data; + + data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + memcpy(&data->info, &mp2891_info, sizeof(mp2891_info)); + + return pmbus_do_probe(client, &data->info); +} + +static const struct i2c_device_id mp2891_id[] = { + {"mp2891", 0}, + {} +}; +MODULE_DEVICE_TABLE(i2c, mp2891_id); + +static const struct of_device_id __maybe_unused mp2891_of_match[] = { + {.compatible = "mps,mp2891"}, + {} +}; +MODULE_DEVICE_TABLE(of, mp2891_of_match); + +static struct i2c_driver mp2891_driver = { + .driver = { + .name = "mp2891", + .of_match_table = mp2891_of_match, + }, + .probe = mp2891_probe, + .id_table = mp2891_id, +}; + +module_i2c_driver(mp2891_driver); + +MODULE_AUTHOR("Noah Wang <noahwang.wang@outlook.com>"); +MODULE_DESCRIPTION("PMBus driver for MPS MP2891"); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS(PMBUS); diff --git a/drivers/hwmon/pmbus/mp2993.c b/drivers/hwmon/pmbus/mp2993.c new file mode 100644 index 000000000000..944593e13231 --- /dev/null +++ b/drivers/hwmon/pmbus/mp2993.c @@ -0,0 +1,261 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Hardware monitoring driver for MPS Multi-phase Digital VR Controllers(MP2993) + */ + +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include "pmbus.h" + +#define MP2993_VOUT_OVUV_UINT 125 +#define MP2993_VOUT_OVUV_DIV 64 +#define MP2993_VIN_LIMIT_UINT 1 +#define MP2993_VIN_LIMIT_DIV 8 +#define MP2993_READ_VIN_UINT 1 +#define MP2993_READ_VIN_DIV 32 + +#define MP2993_PAGE_NUM 2 + +#define MP2993_RAIL1_FUNC (PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | \ + PMBUS_HAVE_IOUT | PMBUS_HAVE_POUT | \ + PMBUS_HAVE_TEMP | PMBUS_HAVE_PIN | \ + PMBUS_HAVE_IIN | \ + PMBUS_HAVE_STATUS_VOUT | \ + PMBUS_HAVE_STATUS_IOUT | \ + PMBUS_HAVE_STATUS_TEMP | \ + PMBUS_HAVE_STATUS_INPUT) + +#define MP2993_RAIL2_FUNC (PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT | \ + PMBUS_HAVE_POUT | PMBUS_HAVE_TEMP | \ + PMBUS_HAVE_STATUS_VOUT | \ + PMBUS_HAVE_STATUS_IOUT | \ + PMBUS_HAVE_STATUS_TEMP | \ + PMBUS_HAVE_STATUS_INPUT) + +/* Converts a linear11 data exponent to a specified value */ +static u16 mp2993_linear11_exponent_transfer(u16 word, u16 expect_exponent) +{ + s16 exponent, mantissa, target_exponent; + + exponent = ((s16)word) >> 11; + mantissa = ((s16)((word & 0x7ff) << 5)) >> 5; + target_exponent = (s16)((expect_exponent & 0x1f) << 11) >> 11; + + if (exponent > target_exponent) + mantissa = mantissa << (exponent - target_exponent); + else + mantissa = mantissa >> (target_exponent - exponent); + + return (mantissa & 0x7ff) | ((expect_exponent << 11) & 0xf800); +} + +static int +mp2993_set_vout_format(struct i2c_client *client, int page, int format) +{ + int ret; + + ret = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page); + if (ret < 0) + return ret; + + return i2c_smbus_write_byte_data(client, PMBUS_VOUT_MODE, format); +} + +static int mp2993_identify(struct i2c_client *client, struct pmbus_driver_info *info) +{ + int ret; + + /* Set vout to direct format for rail1. */ + ret = mp2993_set_vout_format(client, 0, PB_VOUT_MODE_DIRECT); + if (ret < 0) + return ret; + + /* Set vout to direct format for rail2. */ + return mp2993_set_vout_format(client, 1, PB_VOUT_MODE_DIRECT); +} + +static int mp2993_read_word_data(struct i2c_client *client, int page, int phase, + int reg) +{ + int ret; + + switch (reg) { + case PMBUS_VOUT_OV_FAULT_LIMIT: + case PMBUS_VOUT_UV_FAULT_LIMIT: + ret = pmbus_read_word_data(client, page, phase, reg); + if (ret < 0) + return ret; + + ret = DIV_ROUND_CLOSEST(ret * MP2993_VOUT_OVUV_UINT, MP2993_VOUT_OVUV_DIV); + break; + case PMBUS_OT_FAULT_LIMIT: + case PMBUS_OT_WARN_LIMIT: + /* + * The MP2993 ot fault limit value and ot warn limit value + * per rail are always the same, so only PMBUS_OT_FAULT_LIMIT + * and PMBUS_OT_WARN_LIMIT register in page 0 are defined to + * indicates the limit value. + */ + ret = pmbus_read_word_data(client, 0, phase, reg); + break; + case PMBUS_READ_VIN: + /* The MP2993 vin scale is (1/32V)/Lsb */ + ret = pmbus_read_word_data(client, page, phase, reg); + if (ret < 0) + return ret; + + ret = DIV_ROUND_CLOSEST((ret & GENMASK(9, 0)) * MP2993_READ_VIN_UINT, + MP2993_READ_VIN_DIV); + break; + case PMBUS_VIN_OV_FAULT_LIMIT: + case PMBUS_VIN_OV_WARN_LIMIT: + case PMBUS_VIN_UV_WARN_LIMIT: + case PMBUS_VIN_UV_FAULT_LIMIT: + /* The MP2993 vin limit scale is (1/8V)/Lsb */ + ret = pmbus_read_word_data(client, page, phase, reg); + if (ret < 0) + return ret; + + ret = DIV_ROUND_CLOSEST((ret & GENMASK(7, 0)) * MP2993_VIN_LIMIT_UINT, + MP2993_VIN_LIMIT_DIV); + break; + case PMBUS_READ_IOUT: + case PMBUS_READ_IIN: + case PMBUS_IIN_OC_WARN_LIMIT: + case PMBUS_IOUT_OC_FAULT_LIMIT: + case PMBUS_IOUT_OC_WARN_LIMIT: + case PMBUS_READ_VOUT: + case PMBUS_READ_PIN: + case PMBUS_READ_POUT: + case PMBUS_READ_TEMPERATURE_1: + ret = -ENODATA; + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static int mp2993_write_word_data(struct i2c_client *client, int page, int reg, + u16 word) +{ + int ret; + + switch (reg) { + case PMBUS_VOUT_OV_FAULT_LIMIT: + case PMBUS_VOUT_UV_FAULT_LIMIT: + ret = DIV_ROUND_CLOSEST(word * MP2993_VOUT_OVUV_DIV, MP2993_VOUT_OVUV_UINT); + ret = pmbus_write_word_data(client, 0, reg, ret); + break; + case PMBUS_OT_FAULT_LIMIT: + case PMBUS_OT_WARN_LIMIT: + /* + * The MP2993 ot fault limit value and ot warn limit value + * per rail are always the same, so only PMBUS_OT_FAULT_LIMIT + * and PMBUS_OT_WARN_LIMIT register in page 0 are defined to + * config the ot limit value. + */ + ret = pmbus_write_word_data(client, 0, reg, word); + break; + case PMBUS_VIN_OV_FAULT_LIMIT: + case PMBUS_VIN_OV_WARN_LIMIT: + case PMBUS_VIN_UV_WARN_LIMIT: + case PMBUS_VIN_UV_FAULT_LIMIT: + /* The MP2993 vin limit scale is (1/8V)/Lsb */ + ret = pmbus_write_word_data(client, 0, reg, + DIV_ROUND_CLOSEST(word * MP2993_VIN_LIMIT_DIV, + MP2993_VIN_LIMIT_UINT)); + break; + case PMBUS_IIN_OC_WARN_LIMIT: + /* + * The PMBUS_IIN_OC_WARN_LIMIT of MP2993 is linear11 format, + * and the exponent is a constant value(5'b00000)， so the + * exponent of word parameter should be converted to 5'b00000. + */ + ret = pmbus_write_word_data(client, page, reg, + mp2993_linear11_exponent_transfer(word, 0x00)); + break; + // + case PMBUS_IOUT_OC_FAULT_LIMIT: + case PMBUS_IOUT_OC_WARN_LIMIT: + /* + * The PMBUS_IOUT_OC_FAULT_LIMIT and PMBUS_IOUT_OC_WARN_LIMIT + * of MP2993 can be regarded as linear11 format, and the + * exponent is a 5'b00001 or 5'b00000. To ensure a larger + * range of limit value, so the exponent of word parameter + * should be converted to 5'b00001. + */ + ret = pmbus_write_word_data(client, page, reg, + mp2993_linear11_exponent_transfer(word, 0x01)); + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static struct pmbus_driver_info mp2993_info = { + .pages = MP2993_PAGE_NUM, + .format[PSC_VOLTAGE_IN] = direct, + .format[PSC_CURRENT_IN] = linear, + .format[PSC_CURRENT_OUT] = linear, + .format[PSC_TEMPERATURE] = direct, + .format[PSC_POWER] = linear, + .format[PSC_VOLTAGE_OUT] = direct, + + .m[PSC_VOLTAGE_OUT] = 1, + .R[PSC_VOLTAGE_OUT] = 3, + .b[PSC_VOLTAGE_OUT] = 0, + + .m[PSC_VOLTAGE_IN] = 1, + .R[PSC_VOLTAGE_IN] = 0, + .b[PSC_VOLTAGE_IN] = 0, + + .m[PSC_TEMPERATURE] = 1, + .R[PSC_TEMPERATURE] = 0, + .b[PSC_TEMPERATURE] = 0, + + .func[0] = MP2993_RAIL1_FUNC, + .func[1] = MP2993_RAIL2_FUNC, + .read_word_data = mp2993_read_word_data, + .write_word_data = mp2993_write_word_data, + .identify = mp2993_identify, +}; + +static int mp2993_probe(struct i2c_client *client) +{ + return pmbus_do_probe(client, &mp2993_info); +} + +static const struct i2c_device_id mp2993_id[] = { + {"mp2993", 0}, + {} +}; +MODULE_DEVICE_TABLE(i2c, mp2993_id); + +static const struct of_device_id __maybe_unused mp2993_of_match[] = { + {.compatible = "mps,mp2993"}, + {} +}; +MODULE_DEVICE_TABLE(of, mp2993_of_match); + +static struct i2c_driver mp2993_driver = { + .driver = { + .name = "mp2993", + .of_match_table = mp2993_of_match, + }, + .probe = mp2993_probe, + .id_table = mp2993_id, +}; + +module_i2c_driver(mp2993_driver); + +MODULE_AUTHOR("Noah Wang <noahwang.wang@outlook.com>"); +MODULE_DESCRIPTION("PMBus driver for MPS MP2993"); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS(PMBUS); diff --git a/drivers/hwmon/pmbus/mp5920.c b/drivers/hwmon/pmbus/mp5920.c new file mode 100644 index 000000000000..f6d7527ade7d --- /dev/null +++ b/drivers/hwmon/pmbus/mp5920.c @@ -0,0 +1,90 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Hardware monitoring driver for MP5920 and compatible chips. + */ + +#include <linux/i2c.h> +#include <linux/minmax.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include "pmbus.h" + +static struct pmbus_driver_info mp5920_info = { + .pages = 1, + .format[PSC_VOLTAGE_IN] = direct, + .format[PSC_VOLTAGE_OUT] = direct, + .format[PSC_CURRENT_OUT] = direct, + .format[PSC_POWER] = direct, + .format[PSC_TEMPERATURE] = direct, + .m[PSC_VOLTAGE_IN] = 2266, + .b[PSC_VOLTAGE_IN] = 0, + .R[PSC_VOLTAGE_IN] = -1, + .m[PSC_VOLTAGE_OUT] = 2266, + .b[PSC_VOLTAGE_OUT] = 0, + .R[PSC_VOLTAGE_OUT] = -1, + .m[PSC_CURRENT_OUT] = 546, + .b[PSC_CURRENT_OUT] = 0, + .R[PSC_CURRENT_OUT] = -2, + .m[PSC_POWER] = 5840, + .b[PSC_POWER] = 0, + .R[PSC_POWER] = -3, + .m[PSC_TEMPERATURE] = 1067, + .b[PSC_TEMPERATURE] = 20500, + .R[PSC_TEMPERATURE] = -2, + .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | + PMBUS_HAVE_IOUT | PMBUS_HAVE_POUT | + PMBUS_HAVE_TEMP, +}; + +static int mp5920_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + int ret; + u8 buf[I2C_SMBUS_BLOCK_MAX]; + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_READ_WORD_DATA)) + return -ENODEV; + + ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, buf); + if (ret < 0) + return dev_err_probe(dev, ret, "Failed to read PMBUS_MFR_MODEL\n"); + + if (ret != 6 || strncmp(buf, "MP5920", 6)) { + return dev_err_probe(dev, -ENODEV, "Model '%.*s' not supported\n", + min_t(int, ret, sizeof(buf)), buf); + } + + return pmbus_do_probe(client, &mp5920_info); +} + +static const struct of_device_id mp5920_of_match[] = { + { .compatible = "mps,mp5920" }, + { } +}; + +MODULE_DEVICE_TABLE(of, mp5920_of_match); + +static const struct i2c_device_id mp5920_id[] = { + { "mp5920" }, + { } +}; + +MODULE_DEVICE_TABLE(i2c, mp5920_id); + +static struct i2c_driver mp5920_driver = { + .driver = { + .name = "mp5920", + .of_match_table = mp5920_of_match, + }, + .probe = mp5920_probe, + .id_table = mp5920_id, +}; + +module_i2c_driver(mp5920_driver); + +MODULE_AUTHOR("Tony Ao <tony_ao@wiwynn.com>"); +MODULE_AUTHOR("Alex Vdovydchenko <xzeol@yahoo.com>"); +MODULE_DESCRIPTION("PMBus driver for MP5920 HSC"); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS(PMBUS); diff --git a/drivers/hwmon/pmbus/mp9941.c b/drivers/hwmon/pmbus/mp9941.c new file mode 100644 index 000000000000..543955cfce67 --- /dev/null +++ b/drivers/hwmon/pmbus/mp9941.c @@ -0,0 +1,319 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Hardware monitoring driver for MPS Multi-phase Digital VR Controllers(MP9941) + */ + +#include <linux/bitfield.h> +#include <linux/bits.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include "pmbus.h" + +/* + * Vender specific registers. The MFR_ICC_MAX(0x02) is used to + * config the iin scale. The MFR_RESO_SET(0xC7) is used to + * config the vout format. The MFR_VR_MULTI_CONFIG_R1(0x0D) is + * used to identify the vout vid step. + */ +#define MFR_ICC_MAX 0x02 +#define MFR_RESO_SET 0xC7 +#define MFR_VR_MULTI_CONFIG_R1 0x0D + +#define MP9941_VIN_LIMIT_UINT 1 +#define MP9941_VIN_LIMIT_DIV 8 +#define MP9941_READ_VIN_UINT 1 +#define MP9941_READ_VIN_DIV 32 + +#define MP9941_PAGE_NUM 1 + +#define MP9941_RAIL1_FUNC (PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | \ + PMBUS_HAVE_IOUT | PMBUS_HAVE_POUT | \ + PMBUS_HAVE_TEMP | PMBUS_HAVE_PIN | \ + PMBUS_HAVE_IIN | \ + PMBUS_HAVE_STATUS_VOUT | \ + PMBUS_HAVE_STATUS_IOUT | \ + PMBUS_HAVE_STATUS_TEMP | \ + PMBUS_HAVE_STATUS_INPUT) + +struct mp9941_data { + struct pmbus_driver_info info; + int vid_resolution; +}; + +#define to_mp9941_data(x) container_of(x, struct mp9941_data, info) + +static int mp9941_set_vout_format(struct i2c_client *client) +{ + int ret; + + ret = i2c_smbus_write_byte_data(client, PMBUS_PAGE, 0); + if (ret < 0) + return ret; + + ret = i2c_smbus_read_word_data(client, MFR_RESO_SET); + if (ret < 0) + return ret; + + /* + * page = 0, MFR_RESO_SET[7:6] defines the vout format + * 2'b11 set the vout format as direct + */ + ret = (ret & ~GENMASK(7, 6)) | FIELD_PREP(GENMASK(7, 6), 3); + + return i2c_smbus_write_word_data(client, MFR_RESO_SET, ret); +} + +static int +mp9941_identify_vid_resolution(struct i2c_client *client, struct pmbus_driver_info *info) +{ + struct mp9941_data *data = to_mp9941_data(info); + int ret; + + /* + * page = 2, MFR_VR_MULTI_CONFIG_R1[4:4] defines rail1 vid step value + * 1'b0 represents the vid step value is 10mV + * 1'b1 represents the vid step value is 5mV + */ + ret = i2c_smbus_write_byte_data(client, PMBUS_PAGE, 2); + if (ret < 0) + return ret; + + ret = i2c_smbus_read_word_data(client, MFR_VR_MULTI_CONFIG_R1); + if (ret < 0) + return ret; + + if (FIELD_GET(GENMASK(4, 4), ret)) + data->vid_resolution = 5; + else + data->vid_resolution = 10; + + return 0; +} + +static int mp9941_identify_iin_scale(struct i2c_client *client) +{ + int ret; + + ret = i2c_smbus_write_byte_data(client, PMBUS_PAGE, 0); + if (ret < 0) + return ret; + + ret = i2c_smbus_read_word_data(client, MFR_RESO_SET); + if (ret < 0) + return ret; + + ret = (ret & ~GENMASK(3, 2)) | FIELD_PREP(GENMASK(3, 2), 0); + + ret = i2c_smbus_write_word_data(client, MFR_RESO_SET, ret); + if (ret < 0) + return ret; + + /* + * page = 2, MFR_ICC_MAX[15:13] defines the iin scale + * 3'b000 set the iout scale as 0.5A/Lsb + */ + ret = i2c_smbus_write_byte_data(client, PMBUS_PAGE, 2); + if (ret < 0) + return ret; + + ret = i2c_smbus_read_word_data(client, MFR_ICC_MAX); + if (ret < 0) + return ret; + + ret = (ret & ~GENMASK(15, 13)) | FIELD_PREP(GENMASK(15, 13), 0); + + return i2c_smbus_write_word_data(client, MFR_ICC_MAX, ret); +} + +static int mp9941_identify(struct i2c_client *client, struct pmbus_driver_info *info) +{ + int ret; + + ret = mp9941_identify_iin_scale(client); + if (ret < 0) + return ret; + + ret = mp9941_identify_vid_resolution(client, info); + if (ret < 0) + return ret; + + return mp9941_set_vout_format(client); +} + +static int mp9941_read_word_data(struct i2c_client *client, int page, int phase, + int reg) +{ + const struct pmbus_driver_info *info = pmbus_get_driver_info(client); + struct mp9941_data *data = to_mp9941_data(info); + int ret; + + switch (reg) { + case PMBUS_READ_VIN: + /* The MP9941 vin scale is (1/32V)/Lsb */ + ret = pmbus_read_word_data(client, page, phase, reg); + if (ret < 0) + return ret; + + ret = DIV_ROUND_CLOSEST((ret & GENMASK(9, 0)) * MP9941_READ_VIN_UINT, + MP9941_READ_VIN_DIV); + break; + case PMBUS_READ_IIN: + ret = pmbus_read_word_data(client, page, phase, reg); + if (ret < 0) + return ret; + + ret = ret & GENMASK(10, 0); + break; + case PMBUS_VIN_OV_FAULT_LIMIT: + /* The MP9941 vin ov limit scale is (1/8V)/Lsb */ + ret = pmbus_read_word_data(client, page, phase, reg); + if (ret < 0) + return ret; + + ret = DIV_ROUND_CLOSEST((ret & GENMASK(7, 0)) * MP9941_VIN_LIMIT_UINT, + MP9941_VIN_LIMIT_DIV); + break; + case PMBUS_IIN_OC_WARN_LIMIT: + ret = pmbus_read_word_data(client, page, phase, reg); + if (ret < 0) + return ret; + + ret = ret & GENMASK(7, 0); + break; + case PMBUS_VOUT_UV_FAULT_LIMIT: + case PMBUS_MFR_VOUT_MIN: + case PMBUS_MFR_VOUT_MAX: + /* + * The vout scale is set to 1mV/Lsb(using r/m/b scale). + * But the vout uv limit and vout max/min scale is 1VID/Lsb, + * so the vout uv limit and vout max/min value should be + * multiplied by vid resolution. + */ + ret = pmbus_read_word_data(client, page, phase, reg); + if (ret < 0) + return ret; + + ret = ret * data->vid_resolution; + break; + case PMBUS_READ_IOUT: + case PMBUS_READ_POUT: + case PMBUS_READ_TEMPERATURE_1: + case PMBUS_READ_VOUT: + case PMBUS_READ_PIN: + case PMBUS_OT_FAULT_LIMIT: + case PMBUS_OT_WARN_LIMIT: + ret = -ENODATA; + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static int mp9941_write_word_data(struct i2c_client *client, int page, int reg, + u16 word) +{ + const struct pmbus_driver_info *info = pmbus_get_driver_info(client); + struct mp9941_data *data = to_mp9941_data(info); + int ret; + + switch (reg) { + case PMBUS_VIN_OV_FAULT_LIMIT: + /* The MP9941 vin ov limit scale is (1/8V)/Lsb */ + ret = pmbus_write_word_data(client, page, reg, + DIV_ROUND_CLOSEST(word * MP9941_VIN_LIMIT_DIV, + MP9941_VIN_LIMIT_UINT)); + break; + case PMBUS_VOUT_UV_FAULT_LIMIT: + case PMBUS_MFR_VOUT_MIN: + case PMBUS_MFR_VOUT_MAX: + ret = pmbus_write_word_data(client, page, reg, + DIV_ROUND_CLOSEST(word, data->vid_resolution)); + break; + case PMBUS_IIN_OC_WARN_LIMIT: + case PMBUS_OT_FAULT_LIMIT: + case PMBUS_OT_WARN_LIMIT: + ret = -ENODATA; + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static const struct pmbus_driver_info mp9941_info = { + .pages = MP9941_PAGE_NUM, + .format[PSC_VOLTAGE_IN] = direct, + .format[PSC_CURRENT_IN] = direct, + .format[PSC_CURRENT_OUT] = linear, + .format[PSC_POWER] = linear, + .format[PSC_TEMPERATURE] = direct, + .format[PSC_VOLTAGE_OUT] = direct, + + .m[PSC_TEMPERATURE] = 1, + .R[PSC_TEMPERATURE] = 0, + .b[PSC_TEMPERATURE] = 0, + + .m[PSC_VOLTAGE_IN] = 1, + .R[PSC_VOLTAGE_IN] = 0, + .b[PSC_VOLTAGE_IN] = 0, + + .m[PSC_CURRENT_IN] = 2, + .R[PSC_CURRENT_IN] = 0, + .b[PSC_CURRENT_IN] = 0, + + .m[PSC_VOLTAGE_OUT] = 1, + .R[PSC_VOLTAGE_OUT] = 3, + .b[PSC_VOLTAGE_OUT] = 0, + + .func[0] = MP9941_RAIL1_FUNC, + .read_word_data = mp9941_read_word_data, + .write_word_data = mp9941_write_word_data, + .identify = mp9941_identify, +}; + +static int mp9941_probe(struct i2c_client *client) +{ + struct mp9941_data *data; + + data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + memcpy(&data->info, &mp9941_info, sizeof(mp9941_info)); + + return pmbus_do_probe(client, &data->info); +} + +static const struct i2c_device_id mp9941_id[] = { + {"mp9941", 0}, + {} +}; +MODULE_DEVICE_TABLE(i2c, mp9941_id); + +static const struct of_device_id __maybe_unused mp9941_of_match[] = { + {.compatible = "mps,mp9941"}, + {} +}; +MODULE_DEVICE_TABLE(of, mp9941_of_match); + +static struct i2c_driver mp9941_driver = { + .driver = { + .name = "mp9941", + .of_match_table = mp9941_of_match, + }, + .probe = mp9941_probe, + .id_table = mp9941_id, +}; + +module_i2c_driver(mp9941_driver); + +MODULE_AUTHOR("Noah Wang <noahwang.wang@outlook.com>"); +MODULE_DESCRIPTION("PMBus driver for MPS MP9941"); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS(PMBUS); |