diff options
Diffstat (limited to 'drivers/hwmon/pmbus/ltc2978.c')
| -rw-r--r-- | drivers/hwmon/pmbus/ltc2978.c | 202 |
1 files changed, 173 insertions, 29 deletions
diff --git a/drivers/hwmon/pmbus/ltc2978.c b/drivers/hwmon/pmbus/ltc2978.c index a91ed01abb68..6d2592731ba3 100644 --- a/drivers/hwmon/pmbus/ltc2978.c +++ b/drivers/hwmon/pmbus/ltc2978.c @@ -19,8 +19,15 @@ #include <linux/regulator/driver.h> #include "pmbus.h" -enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc2980, ltc3880, ltc3882, - ltc3883, ltc3886, ltc3887, ltm2987, ltm4675, ltm4676, ltm4686 }; +enum chips { + /* Managers */ + ltc2972, ltc2974, ltc2975, ltc2977, ltc2978, ltc2979, ltc2980, + /* Controllers */ + ltc3880, ltc3882, ltc3883, ltc3884, ltc3886, ltc3887, ltc3889, ltc7880, + /* Modules */ + ltm2987, ltm4664, ltm4675, ltm4676, ltm4677, ltm4678, ltm4680, ltm4686, + ltm4700, +}; /* Common for all chips */ #define LTC2978_MFR_VOUT_PEAK 0xdd @@ -43,9 +50,10 @@ enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc2980, ltc3880, ltc3882, #define LTC3880_MFR_CLEAR_PEAKS 0xe3 #define LTC3880_MFR_TEMPERATURE2_PEAK 0xf4 -/* LTC3883 and LTC3886 only */ +/* LTC3883, LTC3884, LTC3886, LTC3889 and LTC7880 only */ #define LTC3883_MFR_IIN_PEAK 0xe1 + /* LTC2975 only */ #define LTC2975_MFR_IIN_PEAK 0xc4 #define LTC2975_MFR_IIN_MIN 0xc5 @@ -54,27 +62,41 @@ enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc2980, ltc3880, ltc3882, #define LTC2978_ID_MASK 0xfff0 +#define LTC2972_ID 0x0310 #define LTC2974_ID 0x0210 #define LTC2975_ID 0x0220 #define LTC2977_ID 0x0130 #define LTC2978_ID_REV1 0x0110 /* Early revision */ #define LTC2978_ID_REV2 0x0120 +#define LTC2979_ID_A 0x8060 +#define LTC2979_ID_B 0x8070 #define LTC2980_ID_A 0x8030 /* A/B for two die IDs */ #define LTC2980_ID_B 0x8040 #define LTC3880_ID 0x4020 #define LTC3882_ID 0x4200 #define LTC3882_ID_D1 0x4240 /* Dash 1 */ #define LTC3883_ID 0x4300 +#define LTC3884_ID 0x4C00 #define LTC3886_ID 0x4600 #define LTC3887_ID 0x4700 #define LTM2987_ID_A 0x8010 /* A/B for two die IDs */ #define LTM2987_ID_B 0x8020 +#define LTC3889_ID 0x4900 +#define LTC7880_ID 0x49E0 +#define LTM4664_ID 0x4120 #define LTM4675_ID 0x47a0 #define LTM4676_ID_REV1 0x4400 #define LTM4676_ID_REV2 0x4480 #define LTM4676A_ID 0x47e0 +#define LTM4677_ID_REV1 0x47B0 +#define LTM4677_ID_REV2 0x47D0 +#define LTM4678_ID_REV1 0x4100 +#define LTM4678_ID_REV2 0x4110 +#define LTM4680_ID 0x4140 #define LTM4686_ID 0x4770 +#define LTM4700_ID 0x4130 +#define LTC2972_NUM_PAGES 2 #define LTC2974_NUM_PAGES 4 #define LTC2978_NUM_PAGES 8 #define LTC3880_NUM_PAGES 2 @@ -151,7 +173,8 @@ static int ltc_wait_ready(struct i2c_client *client) return -ETIMEDOUT; } -static int ltc_read_word_data(struct i2c_client *client, int page, int reg) +static int ltc_read_word_data(struct i2c_client *client, int page, int phase, + int reg) { int ret; @@ -159,7 +182,7 @@ static int ltc_read_word_data(struct i2c_client *client, int page, int reg) if (ret < 0) return ret; - return pmbus_read_word_data(client, page, reg); + return pmbus_read_word_data(client, page, 0xff, reg); } static int ltc_read_byte_data(struct i2c_client *client, int page, int reg) @@ -173,6 +196,17 @@ static int ltc_read_byte_data(struct i2c_client *client, int page, int reg) return pmbus_read_byte_data(client, page, reg); } +static int ltc_write_byte_data(struct i2c_client *client, int page, int reg, u8 value) +{ + int ret; + + ret = ltc_wait_ready(client); + if (ret < 0) + return ret; + + return pmbus_write_byte_data(client, page, reg, value); +} + static int ltc_write_byte(struct i2c_client *client, int page, u8 byte) { int ret; @@ -202,7 +236,7 @@ static int ltc_get_max(struct ltc2978_data *data, struct i2c_client *client, { int ret; - ret = ltc_read_word_data(client, page, reg); + ret = ltc_read_word_data(client, page, 0xff, reg); if (ret >= 0) { if (lin11_to_val(ret) > lin11_to_val(*pmax)) *pmax = ret; @@ -216,7 +250,7 @@ static int ltc_get_min(struct ltc2978_data *data, struct i2c_client *client, { int ret; - ret = ltc_read_word_data(client, page, reg); + ret = ltc_read_word_data(client, page, 0xff, reg); if (ret >= 0) { if (lin11_to_val(ret) < lin11_to_val(*pmin)) *pmin = ret; @@ -238,7 +272,8 @@ static int ltc2978_read_word_data_common(struct i2c_client *client, int page, &data->vin_max); break; case PMBUS_VIRT_READ_VOUT_MAX: - ret = ltc_read_word_data(client, page, LTC2978_MFR_VOUT_PEAK); + ret = ltc_read_word_data(client, page, 0xff, + LTC2978_MFR_VOUT_PEAK); if (ret >= 0) { /* * VOUT is 16 bit unsigned with fixed exponent, @@ -269,7 +304,8 @@ static int ltc2978_read_word_data_common(struct i2c_client *client, int page, return ret; } -static int ltc2978_read_word_data(struct i2c_client *client, int page, int reg) +static int ltc2978_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 ltc2978_data *data = to_ltc2978_data(info); @@ -281,7 +317,8 @@ static int ltc2978_read_word_data(struct i2c_client *client, int page, int reg) &data->vin_min); break; case PMBUS_VIRT_READ_VOUT_MIN: - ret = ltc_read_word_data(client, page, LTC2978_MFR_VOUT_MIN); + ret = ltc_read_word_data(client, page, phase, + LTC2978_MFR_VOUT_MIN); if (ret >= 0) { /* * VOUT_MIN is known to not be supported on some lots @@ -314,7 +351,8 @@ static int ltc2978_read_word_data(struct i2c_client *client, int page, int reg) return ret; } -static int ltc2974_read_word_data(struct i2c_client *client, int page, int reg) +static int ltc2974_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 ltc2978_data *data = to_ltc2978_data(info); @@ -333,13 +371,14 @@ static int ltc2974_read_word_data(struct i2c_client *client, int page, int reg) ret = 0; break; default: - ret = ltc2978_read_word_data(client, page, reg); + ret = ltc2978_read_word_data(client, page, phase, reg); break; } return ret; } -static int ltc2975_read_word_data(struct i2c_client *client, int page, int reg) +static int ltc2975_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 ltc2978_data *data = to_ltc2978_data(info); @@ -367,13 +406,14 @@ static int ltc2975_read_word_data(struct i2c_client *client, int page, int reg) ret = 0; break; default: - ret = ltc2978_read_word_data(client, page, reg); + ret = ltc2978_read_word_data(client, page, phase, reg); break; } return ret; } -static int ltc3880_read_word_data(struct i2c_client *client, int page, int reg) +static int ltc3880_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 ltc2978_data *data = to_ltc2978_data(info); @@ -405,7 +445,8 @@ static int ltc3880_read_word_data(struct i2c_client *client, int page, int reg) return ret; } -static int ltc3883_read_word_data(struct i2c_client *client, int page, int reg) +static int ltc3883_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 ltc2978_data *data = to_ltc2978_data(info); @@ -420,7 +461,7 @@ static int ltc3883_read_word_data(struct i2c_client *client, int page, int reg) ret = 0; break; default: - ret = ltc3880_read_word_data(client, page, reg); + ret = ltc3880_read_word_data(client, page, phase, reg); break; } return ret; @@ -492,26 +533,53 @@ static int ltc2978_write_word_data(struct i2c_client *client, int page, } static const struct i2c_device_id ltc2978_id[] = { + {"ltc2972", ltc2972}, {"ltc2974", ltc2974}, {"ltc2975", ltc2975}, {"ltc2977", ltc2977}, {"ltc2978", ltc2978}, + {"ltc2979", ltc2979}, {"ltc2980", ltc2980}, {"ltc3880", ltc3880}, {"ltc3882", ltc3882}, {"ltc3883", ltc3883}, + {"ltc3884", ltc3884}, {"ltc3886", ltc3886}, {"ltc3887", ltc3887}, + {"ltc3889", ltc3889}, + {"ltc7880", ltc7880}, {"ltm2987", ltm2987}, + {"ltm4664", ltm4664}, {"ltm4675", ltm4675}, {"ltm4676", ltm4676}, + {"ltm4677", ltm4677}, + {"ltm4678", ltm4678}, + {"ltm4680", ltm4680}, {"ltm4686", ltm4686}, + {"ltm4700", ltm4700}, {} }; MODULE_DEVICE_TABLE(i2c, ltc2978_id); #if IS_ENABLED(CONFIG_SENSORS_LTC2978_REGULATOR) +#define LTC2978_ADC_RES 0xFFFF +#define LTC2978_N_ADC 122 +#define LTC2978_MAX_UV (LTC2978_ADC_RES * LTC2978_N_ADC) +#define LTC2978_UV_STEP 1000 +#define LTC2978_N_VOLTAGES ((LTC2978_MAX_UV / LTC2978_UV_STEP) + 1) + static const struct regulator_desc ltc2978_reg_desc[] = { + PMBUS_REGULATOR_STEP("vout", 0, LTC2978_N_VOLTAGES, LTC2978_UV_STEP), + PMBUS_REGULATOR_STEP("vout", 1, LTC2978_N_VOLTAGES, LTC2978_UV_STEP), + PMBUS_REGULATOR_STEP("vout", 2, LTC2978_N_VOLTAGES, LTC2978_UV_STEP), + PMBUS_REGULATOR_STEP("vout", 3, LTC2978_N_VOLTAGES, LTC2978_UV_STEP), + PMBUS_REGULATOR_STEP("vout", 4, LTC2978_N_VOLTAGES, LTC2978_UV_STEP), + PMBUS_REGULATOR_STEP("vout", 5, LTC2978_N_VOLTAGES, LTC2978_UV_STEP), + PMBUS_REGULATOR_STEP("vout", 6, LTC2978_N_VOLTAGES, LTC2978_UV_STEP), + PMBUS_REGULATOR_STEP("vout", 7, LTC2978_N_VOLTAGES, LTC2978_UV_STEP), +}; + +static const struct regulator_desc ltc2978_reg_desc_default[] = { PMBUS_REGULATOR("vout", 0), PMBUS_REGULATOR("vout", 1), PMBUS_REGULATOR("vout", 2), @@ -555,7 +623,9 @@ static int ltc2978_get_id(struct i2c_client *client) chip_id &= LTC2978_ID_MASK; - if (chip_id == LTC2974_ID) + if (chip_id == LTC2972_ID) + return ltc2972; + else if (chip_id == LTC2974_ID) return ltc2974; else if (chip_id == LTC2975_ID) return ltc2975; @@ -563,6 +633,8 @@ static int ltc2978_get_id(struct i2c_client *client) return ltc2977; else if (chip_id == LTC2978_ID_REV1 || chip_id == LTC2978_ID_REV2) return ltc2978; + else if (chip_id == LTC2979_ID_A || chip_id == LTC2979_ID_B) + return ltc2979; else if (chip_id == LTC2980_ID_A || chip_id == LTC2980_ID_B) return ltc2980; else if (chip_id == LTC3880_ID) @@ -571,30 +643,46 @@ static int ltc2978_get_id(struct i2c_client *client) return ltc3882; else if (chip_id == LTC3883_ID) return ltc3883; + else if (chip_id == LTC3884_ID) + return ltc3884; else if (chip_id == LTC3886_ID) return ltc3886; else if (chip_id == LTC3887_ID) return ltc3887; + else if (chip_id == LTC3889_ID) + return ltc3889; + else if (chip_id == LTC7880_ID) + return ltc7880; else if (chip_id == LTM2987_ID_A || chip_id == LTM2987_ID_B) return ltm2987; + else if (chip_id == LTM4664_ID) + return ltm4664; else if (chip_id == LTM4675_ID) return ltm4675; else if (chip_id == LTM4676_ID_REV1 || chip_id == LTM4676_ID_REV2 || chip_id == LTM4676A_ID) return ltm4676; + else if (chip_id == LTM4677_ID_REV1 || chip_id == LTM4677_ID_REV2) + return ltm4677; + else if (chip_id == LTM4678_ID_REV1 || chip_id == LTM4678_ID_REV2) + return ltm4678; + else if (chip_id == LTM4680_ID) + return ltm4680; else if (chip_id == LTM4686_ID) return ltm4686; + else if (chip_id == LTM4700_ID) + return ltm4700; dev_err(&client->dev, "Unsupported chip ID 0x%x\n", chip_id); return -ENODEV; } -static int ltc2978_probe(struct i2c_client *client, - const struct i2c_device_id *id) +static int ltc2978_probe(struct i2c_client *client) { int i, chip_id; struct ltc2978_data *data; struct pmbus_driver_info *info; + const struct i2c_device_id *id; if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_READ_WORD_DATA)) @@ -610,15 +698,18 @@ static int ltc2978_probe(struct i2c_client *client, return chip_id; data->id = chip_id; + id = i2c_match_id(ltc2978_id, client); if (data->id != id->driver_data) dev_warn(&client->dev, - "Device mismatch: Configured %s, detected %s\n", + "Device mismatch: Configured %s (%d), detected %d\n", id->name, - ltc2978_id[data->id].name); + (int) id->driver_data, + chip_id); info = &data->info; info->write_word_data = ltc2978_write_word_data; info->write_byte = ltc_write_byte; + info->write_byte_data = ltc_write_byte_data; info->read_word_data = ltc_read_word_data; info->read_byte_data = ltc_read_byte_data; @@ -637,6 +728,19 @@ static int ltc2978_probe(struct i2c_client *client, data->temp2_max = 0x7c00; switch (data->id) { + case ltc2972: + info->read_word_data = ltc2975_read_word_data; + info->pages = LTC2972_NUM_PAGES; + info->func[0] = PMBUS_HAVE_IIN | PMBUS_HAVE_PIN + | PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT + | PMBUS_HAVE_TEMP2; + for (i = 0; i < info->pages; i++) { + info->func[i] |= PMBUS_HAVE_VOUT + | PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_POUT + | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP + | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT; + } + break; case ltc2974: info->read_word_data = ltc2974_read_word_data; info->pages = LTC2974_NUM_PAGES; @@ -662,8 +766,10 @@ static int ltc2978_probe(struct i2c_client *client, | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT; } break; + case ltc2977: case ltc2978: + case ltc2979: case ltc2980: case ltm2987: info->read_word_data = ltc2978_read_word_data; @@ -680,6 +786,7 @@ static int ltc2978_probe(struct i2c_client *client, case ltc3887: case ltm4675: case ltm4676: + case ltm4677: case ltm4686: data->features |= FEAT_CLEAR_PEAKS | FEAT_NEEDS_POLLING; info->read_word_data = ltc3880_read_word_data; @@ -721,7 +828,14 @@ static int ltc2978_probe(struct i2c_client *client, | PMBUS_HAVE_PIN | PMBUS_HAVE_POUT | PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 | PMBUS_HAVE_STATUS_TEMP; break; + case ltc3884: case ltc3886: + case ltc3889: + case ltc7880: + case ltm4664: + case ltm4678: + case ltm4680: + case ltm4700: data->features |= FEAT_CLEAR_PEAKS | FEAT_NEEDS_POLLING; info->read_word_data = ltc3883_read_word_data; info->pages = LTC3880_NUM_PAGES; @@ -742,32 +856,62 @@ static int ltc2978_probe(struct i2c_client *client, #if IS_ENABLED(CONFIG_SENSORS_LTC2978_REGULATOR) info->num_regulators = info->pages; - info->reg_desc = ltc2978_reg_desc; - if (info->num_regulators > ARRAY_SIZE(ltc2978_reg_desc)) { - dev_err(&client->dev, "num_regulators too large!"); - info->num_regulators = ARRAY_SIZE(ltc2978_reg_desc); + switch (data->id) { + case ltc2972: + case ltc2974: + case ltc2975: + case ltc2977: + case ltc2978: + case ltc2979: + case ltc2980: + case ltm2987: + info->reg_desc = ltc2978_reg_desc; + if (info->num_regulators > ARRAY_SIZE(ltc2978_reg_desc)) { + dev_warn(&client->dev, "num_regulators too large!"); + info->num_regulators = ARRAY_SIZE(ltc2978_reg_desc); + } + break; + default: + info->reg_desc = ltc2978_reg_desc_default; + if (info->num_regulators > ARRAY_SIZE(ltc2978_reg_desc_default)) { + dev_warn(&client->dev, "num_regulators too large!"); + info->num_regulators = + ARRAY_SIZE(ltc2978_reg_desc_default); + } + break; } #endif - return pmbus_do_probe(client, id, info); + return pmbus_do_probe(client, info); } + #ifdef CONFIG_OF static const struct of_device_id ltc2978_of_match[] = { + { .compatible = "lltc,ltc2972" }, { .compatible = "lltc,ltc2974" }, { .compatible = "lltc,ltc2975" }, { .compatible = "lltc,ltc2977" }, { .compatible = "lltc,ltc2978" }, + { .compatible = "lltc,ltc2979" }, { .compatible = "lltc,ltc2980" }, { .compatible = "lltc,ltc3880" }, { .compatible = "lltc,ltc3882" }, { .compatible = "lltc,ltc3883" }, + { .compatible = "lltc,ltc3884" }, { .compatible = "lltc,ltc3886" }, { .compatible = "lltc,ltc3887" }, + { .compatible = "lltc,ltc3889" }, + { .compatible = "lltc,ltc7880" }, { .compatible = "lltc,ltm2987" }, + { .compatible = "lltc,ltm4664" }, { .compatible = "lltc,ltm4675" }, { .compatible = "lltc,ltm4676" }, + { .compatible = "lltc,ltm4677" }, + { .compatible = "lltc,ltm4678" }, + { .compatible = "lltc,ltm4680" }, { .compatible = "lltc,ltm4686" }, + { .compatible = "lltc,ltm4700" }, { } }; MODULE_DEVICE_TABLE(of, ltc2978_of_match); @@ -778,8 +922,7 @@ static struct i2c_driver ltc2978_driver = { .name = "ltc2978", .of_match_table = of_match_ptr(ltc2978_of_match), }, - .probe = ltc2978_probe, - .remove = pmbus_do_remove, + .probe_new = ltc2978_probe, .id_table = ltc2978_id, }; @@ -788,3 +931,4 @@ module_i2c_driver(ltc2978_driver); MODULE_AUTHOR("Guenter Roeck"); MODULE_DESCRIPTION("PMBus driver for LTC2978 and compatible chips"); MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS(PMBUS); |