diff options
Diffstat (limited to 'drivers/hwmon/lm90.c')
-rw-r--r-- | drivers/hwmon/lm90.c | 203 |
1 files changed, 142 insertions, 61 deletions
diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c index 9b3c9f390ef8..b62763a85d6e 100644 --- a/drivers/hwmon/lm90.c +++ b/drivers/hwmon/lm90.c @@ -35,6 +35,15 @@ * explicitly as max6659, or if its address is not 0x4c. * These chips lack the remote temperature offset feature. * + * This driver also supports the MAX6654 chip made by Maxim. This chip can be + * at 9 different addresses, similar to MAX6680/MAX6681. The MAX6654 is similar + * to MAX6657/MAX6658/MAX6659, but does not support critical temperature + * limits. Extended range is available by setting the configuration register + * accordingly, and is done during initialization. Extended precision is only + * available at conversion rates of 1 Hz and slower. Note that extended + * precision is not enabled by default, as this driver initializes all chips + * to 2 Hz by design. + * * This driver also supports the MAX6646, MAX6647, MAX6648, MAX6649 and * MAX6692 chips made by Maxim. These are again similar to the LM86, * but they use unsigned temperature values and can report temperatures @@ -61,10 +70,10 @@ * This driver also supports the G781 from GMT. This device is compatible * with the ADM1032. * - * This driver also supports TMP451 from Texas Instruments. This device is - * supported in both compatibility and extended mode. It's mostly compatible - * with ADT7461 except for local temperature low byte register and max - * conversion rate. + * This driver also supports TMP451 and TMP461 from Texas Instruments. + * Those devices are supported in both compatibility and extended mode. + * They are mostly compatible with ADT7461 except for local temperature + * low byte register and max conversion rate. * * Since the LM90 was the first chipset supported by this driver, most * comments will refer to this chipset, but are actually general and @@ -94,8 +103,8 @@ * have address 0x4d. * MAX6647 has address 0x4e. * MAX6659 can have address 0x4c, 0x4d or 0x4e. - * MAX6680 and MAX6681 can have address 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, - * 0x4c, 0x4d or 0x4e. + * MAX6654, MAX6680, and MAX6681 can have address 0x18, 0x19, 0x1a, 0x29, + * 0x2a, 0x2b, 0x4c, 0x4d or 0x4e. * SA56004 can have address 0x48 through 0x4F. */ @@ -104,7 +113,7 @@ static const unsigned short normal_i2c[] = { 0x4d, 0x4e, 0x4f, I2C_CLIENT_END }; enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680, - max6646, w83l771, max6696, sa56004, g781, tmp451 }; + max6646, w83l771, max6696, sa56004, g781, tmp451, tmp461, max6654 }; /* * The LM90 registers @@ -145,7 +154,7 @@ enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680, #define LM90_REG_R_TCRIT_HYST 0x21 #define LM90_REG_W_TCRIT_HYST 0x21 -/* MAX6646/6647/6649/6657/6658/6659/6695/6696 registers */ +/* MAX6646/6647/6649/6654/6657/6658/6659/6695/6696 registers */ #define MAX6657_REG_R_LOCAL_TEMPL 0x11 #define MAX6696_REG_R_STATUS2 0x12 @@ -160,8 +169,12 @@ enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680, #define LM90_MAX_CONVRATE_MS 16000 /* Maximum conversion rate in ms */ -/* TMP451 registers */ +/* TMP451/TMP461 registers */ #define TMP451_REG_R_LOCAL_TEMPL 0x15 +#define TMP451_REG_CONALERT 0x22 + +#define TMP461_REG_CHEN 0x16 +#define TMP461_REG_DFC 0x24 /* * Device flags @@ -174,7 +187,10 @@ enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680, #define LM90_HAVE_EMERGENCY_ALARM (1 << 5)/* emergency alarm */ #define LM90_HAVE_TEMP3 (1 << 6) /* 3rd temperature sensor */ #define LM90_HAVE_BROKEN_ALERT (1 << 7) /* Broken alert */ -#define LM90_PAUSE_FOR_CONFIG (1 << 8) /* Pause conversion for config */ +#define LM90_HAVE_EXTENDED_TEMP (1 << 8) /* extended temperature support*/ +#define LM90_PAUSE_FOR_CONFIG (1 << 9) /* Pause conversion for config */ +#define LM90_HAVE_CRIT (1 << 10)/* Chip supports CRIT/OVERT register */ +#define LM90_HAVE_CRIT_ALRM_SWP (1 << 11)/* critical alarm bits swapped */ /* LM90 status */ #define LM90_STATUS_LTHRM (1 << 0) /* local THERM limit tripped */ @@ -184,6 +200,7 @@ enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680, #define LM90_STATUS_RHIGH (1 << 4) /* remote high temp limit tripped */ #define LM90_STATUS_LLOW (1 << 5) /* local low temp limit tripped */ #define LM90_STATUS_LHIGH (1 << 6) /* local high temp limit tripped */ +#define LM90_STATUS_BUSY (1 << 7) /* conversion is ongoing */ #define MAX6696_STATUS2_R2THRM (1 << 1) /* remote2 THERM limit tripped */ #define MAX6696_STATUS2_R2OPEN (1 << 2) /* remote2 is an open circuit */ @@ -209,6 +226,7 @@ static const struct i2c_device_id lm90_id[] = { { "max6646", max6646 }, { "max6647", max6646 }, { "max6649", max6646 }, + { "max6654", max6654 }, { "max6657", max6657 }, { "max6658", max6657 }, { "max6659", max6659 }, @@ -220,6 +238,7 @@ static const struct i2c_device_id lm90_id[] = { { "w83l771", w83l771 }, { "sa56004", sa56004 }, { "tmp451", tmp451 }, + { "tmp461", tmp461 }, { } }; MODULE_DEVICE_TABLE(i2c, lm90_id); @@ -270,6 +289,10 @@ static const struct of_device_id __maybe_unused lm90_of_match[] = { .data = (void *)max6646 }, { + .compatible = "dallas,max6654", + .data = (void *)max6654 + }, + { .compatible = "dallas,max6657", .data = (void *)max6657 }, @@ -313,6 +336,10 @@ static const struct of_device_id __maybe_unused lm90_of_match[] = { .compatible = "ti,tmp451", .data = (void *)tmp451 }, + { + .compatible = "ti,tmp461", + .data = (void *)tmp461 + }, { }, }; MODULE_DEVICE_TABLE(of, lm90_of_match); @@ -331,80 +358,99 @@ struct lm90_params { static const struct lm90_params lm90_params[] = { [adm1032] = { .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT - | LM90_HAVE_BROKEN_ALERT, + | LM90_HAVE_BROKEN_ALERT | LM90_HAVE_CRIT, .alert_alarms = 0x7c, .max_convrate = 10, }, [adt7461] = { .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT - | LM90_HAVE_BROKEN_ALERT, + | LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXTENDED_TEMP + | LM90_HAVE_CRIT, .alert_alarms = 0x7c, .max_convrate = 10, }, [g781] = { .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT - | LM90_HAVE_BROKEN_ALERT, + | LM90_HAVE_BROKEN_ALERT | LM90_HAVE_CRIT, .alert_alarms = 0x7c, - .max_convrate = 8, + .max_convrate = 7, }, [lm86] = { - .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, + .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT + | LM90_HAVE_CRIT, .alert_alarms = 0x7b, .max_convrate = 9, }, [lm90] = { - .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, + .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT + | LM90_HAVE_CRIT, .alert_alarms = 0x7b, .max_convrate = 9, }, [lm99] = { - .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, + .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT + | LM90_HAVE_CRIT, .alert_alarms = 0x7b, .max_convrate = 9, }, [max6646] = { + .flags = LM90_HAVE_CRIT | LM90_HAVE_BROKEN_ALERT, .alert_alarms = 0x7c, .max_convrate = 6, .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, }, + [max6654] = { + .flags = LM90_HAVE_BROKEN_ALERT, + .alert_alarms = 0x7c, + .max_convrate = 7, + .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, + }, [max6657] = { - .flags = LM90_PAUSE_FOR_CONFIG, + .flags = LM90_PAUSE_FOR_CONFIG | LM90_HAVE_CRIT, .alert_alarms = 0x7c, .max_convrate = 8, .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, }, [max6659] = { - .flags = LM90_HAVE_EMERGENCY, + .flags = LM90_HAVE_EMERGENCY | LM90_HAVE_CRIT, .alert_alarms = 0x7c, .max_convrate = 8, .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, }, [max6680] = { - .flags = LM90_HAVE_OFFSET, + .flags = LM90_HAVE_OFFSET | LM90_HAVE_CRIT + | LM90_HAVE_CRIT_ALRM_SWP | LM90_HAVE_BROKEN_ALERT, .alert_alarms = 0x7c, .max_convrate = 7, }, [max6696] = { .flags = LM90_HAVE_EMERGENCY - | LM90_HAVE_EMERGENCY_ALARM | LM90_HAVE_TEMP3, + | LM90_HAVE_EMERGENCY_ALARM | LM90_HAVE_TEMP3 | LM90_HAVE_CRIT, .alert_alarms = 0x1c7c, .max_convrate = 6, .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, }, [w83l771] = { - .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, + .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT | LM90_HAVE_CRIT, .alert_alarms = 0x7c, .max_convrate = 8, }, [sa56004] = { - .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, + .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT | LM90_HAVE_CRIT, .alert_alarms = 0x7b, .max_convrate = 9, .reg_local_ext = SA56004_REG_R_LOCAL_TEMPL, }, [tmp451] = { .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT - | LM90_HAVE_BROKEN_ALERT, + | LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXTENDED_TEMP | LM90_HAVE_CRIT, + .alert_alarms = 0x7c, + .max_convrate = 9, + .reg_local_ext = TMP451_REG_R_LOCAL_TEMPL, + }, + [tmp461] = { + .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT + | LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXTENDED_TEMP | LM90_HAVE_CRIT, .alert_alarms = 0x7c, .max_convrate = 9, .reg_local_ext = TMP451_REG_R_LOCAL_TEMPL, @@ -632,20 +678,22 @@ static int lm90_update_limits(struct device *dev) struct i2c_client *client = data->client; int val; - val = lm90_read_reg(client, LM90_REG_R_LOCAL_CRIT); - if (val < 0) - return val; - data->temp8[LOCAL_CRIT] = val; + if (data->flags & LM90_HAVE_CRIT) { + val = lm90_read_reg(client, LM90_REG_R_LOCAL_CRIT); + if (val < 0) + return val; + data->temp8[LOCAL_CRIT] = val; - val = lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT); - if (val < 0) - return val; - data->temp8[REMOTE_CRIT] = val; + val = lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT); + if (val < 0) + return val; + data->temp8[REMOTE_CRIT] = val; - val = lm90_read_reg(client, LM90_REG_R_TCRIT_HYST); - if (val < 0) - return val; - data->temp_hyst = val; + val = lm90_read_reg(client, LM90_REG_R_TCRIT_HYST); + if (val < 0) + return val; + data->temp_hyst = val; + } val = lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH); if (val < 0) @@ -773,7 +821,7 @@ static int lm90_update_device(struct device *dev) val = lm90_read_reg(client, LM90_REG_R_STATUS); if (val < 0) return val; - data->alarms = val; /* lower 8 bit of alarms */ + data->alarms = val & ~LM90_STATUS_BUSY; if (data->kind == max6696) { val = lm90_select_remote_channel(data, 1); @@ -979,7 +1027,7 @@ static int lm90_get_temp11(struct lm90_data *data, int index) s16 temp11 = data->temp11[index]; int temp; - if (data->kind == adt7461 || data->kind == tmp451) + if (data->flags & LM90_HAVE_EXTENDED_TEMP) temp = temp_from_u16_adt7461(data, temp11); else if (data->kind == max6646) temp = temp_from_u16(temp11); @@ -1013,7 +1061,7 @@ static int lm90_set_temp11(struct lm90_data *data, int index, long val) if (data->kind == lm99 && index <= 2) val -= 16000; - if (data->kind == adt7461 || data->kind == tmp451) + if (data->flags & LM90_HAVE_EXTENDED_TEMP) data->temp11[index] = temp_to_u16_adt7461(data, val); else if (data->kind == max6646) data->temp11[index] = temp_to_u8(val) << 8; @@ -1040,7 +1088,7 @@ static int lm90_get_temp8(struct lm90_data *data, int index) s8 temp8 = data->temp8[index]; int temp; - if (data->kind == adt7461 || data->kind == tmp451) + if (data->flags & LM90_HAVE_EXTENDED_TEMP) temp = temp_from_u8_adt7461(data, temp8); else if (data->kind == max6646) temp = temp_from_u8(temp8); @@ -1073,7 +1121,7 @@ static int lm90_set_temp8(struct lm90_data *data, int index, long val) if (data->kind == lm99 && index == 3) val -= 16000; - if (data->kind == adt7461 || data->kind == tmp451) + if (data->flags & LM90_HAVE_EXTENDED_TEMP) data->temp8[index] = temp_to_u8_adt7461(data, val); else if (data->kind == max6646) data->temp8[index] = temp_to_u8(val); @@ -1091,7 +1139,7 @@ static int lm90_get_temphyst(struct lm90_data *data, int index) { int temp; - if (data->kind == adt7461 || data->kind == tmp451) + if (data->flags & LM90_HAVE_EXTENDED_TEMP) temp = temp_from_u8_adt7461(data, data->temp8[index]); else if (data->kind == max6646) temp = temp_from_u8(data->temp8[index]); @@ -1111,7 +1159,7 @@ static int lm90_set_temphyst(struct lm90_data *data, long val) int temp; int err; - if (data->kind == adt7461 || data->kind == tmp451) + if (data->flags & LM90_HAVE_EXTENDED_TEMP) temp = temp_from_u8_adt7461(data, data->temp8[LOCAL_CRIT]); else if (data->kind == max6646) temp = temp_from_u8(data->temp8[LOCAL_CRIT]); @@ -1147,6 +1195,7 @@ static const u8 lm90_temp_emerg_index[3] = { static const u8 lm90_min_alarm_bits[3] = { 5, 3, 11 }; static const u8 lm90_max_alarm_bits[3] = { 6, 4, 12 }; static const u8 lm90_crit_alarm_bits[3] = { 0, 1, 9 }; +static const u8 lm90_crit_alarm_bits_swapped[3] = { 1, 0, 9 }; static const u8 lm90_emergency_alarm_bits[3] = { 15, 13, 14 }; static const u8 lm90_fault_bits[3] = { 0, 2, 10 }; @@ -1172,7 +1221,10 @@ static int lm90_temp_read(struct device *dev, u32 attr, int channel, long *val) *val = (data->alarms >> lm90_max_alarm_bits[channel]) & 1; break; case hwmon_temp_crit_alarm: - *val = (data->alarms >> lm90_crit_alarm_bits[channel]) & 1; + if (data->flags & LM90_HAVE_CRIT_ALRM_SWP) + *val = (data->alarms >> lm90_crit_alarm_bits_swapped[channel]) & 1; + else + *val = (data->alarms >> lm90_crit_alarm_bits[channel]) & 1; break; case hwmon_temp_emergency_alarm: *val = (data->alarms >> lm90_emergency_alarm_bits[channel]) & 1; @@ -1420,12 +1472,11 @@ static int lm90_detect(struct i2c_client *client, if (man_id < 0 || chip_id < 0 || config1 < 0 || convrate < 0) return -ENODEV; - if (man_id == 0x01 || man_id == 0x5C || man_id == 0x41) { + if (man_id == 0x01 || man_id == 0x5C || man_id == 0xA1) { config2 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG2); if (config2 < 0) return -ENODEV; - } else - config2 = 0; /* Make compiler happy */ + } if ((address == 0x4C || address == 0x4D) && man_id == 0x01) { /* National Semiconductor */ @@ -1557,6 +1608,16 @@ static int lm90_detect(struct i2c_client *client, && (config1 & 0x3f) == 0x00 && convrate <= 0x07) { name = "max6646"; + } else + /* + * The chip_id of the MAX6654 holds the revision of the chip. + * The lowest 3 bits of the config1 register are unused and + * should return zero when read. + */ + if (chip_id == 0x08 + && (config1 & 0x07) == 0x00 + && convrate <= 0x07) { + name = "max6654"; } } else if (address == 0x4C @@ -1589,18 +1650,26 @@ static int lm90_detect(struct i2c_client *client, && convrate <= 0x08) name = "g781"; } else - if (address == 0x4C - && man_id == 0x55) { /* Texas Instruments */ - int local_ext; + if (man_id == 0x55 && chip_id == 0x00 && + (config1 & 0x1B) == 0x00 && convrate <= 0x09) { + int local_ext, conalert, chen, dfc; local_ext = i2c_smbus_read_byte_data(client, TMP451_REG_R_LOCAL_TEMPL); - - if (chip_id == 0x00 /* TMP451 */ - && (config1 & 0x1B) == 0x00 - && convrate <= 0x09 - && (local_ext & 0x0F) == 0x00) - name = "tmp451"; + conalert = i2c_smbus_read_byte_data(client, + TMP451_REG_CONALERT); + chen = i2c_smbus_read_byte_data(client, TMP461_REG_CHEN); + dfc = i2c_smbus_read_byte_data(client, TMP461_REG_DFC); + + if ((local_ext & 0x0F) == 0x00 && + (conalert & 0xf1) == 0x01 && + (chen & 0xfc) == 0x00 && + (dfc & 0xfc) == 0x00) { + if (address == 0x4c && !(chen & 0x03)) + name = "tmp451"; + else if (address >= 0x48 && address <= 0x4f) + name = "tmp461"; + } } if (!name) { /* identification failed */ @@ -1647,7 +1716,7 @@ static int lm90_init_client(struct i2c_client *client, struct lm90_data *data) lm90_set_convrate(client, data, 500); /* 500ms; 2Hz conversion rate */ /* Check Temperature Range Select */ - if (data->kind == adt7461 || data->kind == tmp451) { + if (data->flags & LM90_HAVE_EXTENDED_TEMP) { if (config & 0x04) data->flags |= LM90_FLAG_ADT7461_EXT; } @@ -1661,6 +1730,15 @@ static int lm90_init_client(struct i2c_client *client, struct lm90_data *data) config |= 0x18; /* + * Put MAX6654 into extended range (0x20, extend minimum range from + * 0 degrees to -64 degrees). Note that extended resolution is not + * possible on the MAX6654 unless conversion rate is set to 1 Hz or + * slower, which is intentionally not done by default. + */ + if (data->kind == max6654) + config |= 0x20; + + /* * Select external channel 0 for max6695/96 */ if (data->kind == max6696) @@ -1806,11 +1884,14 @@ static int lm90_probe(struct i2c_client *client, info->config = data->channel_config; data->channel_config[0] = HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | - HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM | - HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM; + HWMON_T_MIN_ALARM | HWMON_T_MAX_ALARM; data->channel_config[1] = HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | - HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM | - HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT; + HWMON_T_MIN_ALARM | HWMON_T_MAX_ALARM | HWMON_T_FAULT; + + if (data->flags & LM90_HAVE_CRIT) { + data->channel_config[0] |= HWMON_T_CRIT | HWMON_T_CRIT_ALARM | HWMON_T_CRIT_HYST; + data->channel_config[1] |= HWMON_T_CRIT | HWMON_T_CRIT_ALARM | HWMON_T_CRIT_HYST; + } if (data->flags & LM90_HAVE_OFFSET) data->channel_config[1] |= HWMON_T_OFFSET; |