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hwmon: (adm1275) Add support for ADM1075
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck
Guenter Roeck
parent
590defe59e
commit
9271126966
@ -2,6 +2,10 @@ Kernel driver adm1275
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=====================
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Supported chips:
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* Analog Devices ADM1075
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Prefix: 'adm1075'
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Addresses scanned: -
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Datasheet: www.analog.com/static/imported-files/data_sheets/ADM1075.pdf
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* Analog Devices ADM1275
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Prefix: 'adm1275'
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Addresses scanned: -
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@ -17,13 +21,13 @@ Author: Guenter Roeck <guenter.roeck@ericsson.com>
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Description
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-----------
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This driver supports hardware montoring for Analog Devices ADM1275 and ADM1276
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Hot-Swap Controller and Digital Power Monitor.
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This driver supports hardware montoring for Analog Devices ADM1075, ADM1275,
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and ADM1276 Hot-Swap Controller and Digital Power Monitor.
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ADM1275 and ADM1276 are hot-swap controllers that allow a circuit board to be
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removed from or inserted into a live backplane. They also feature current and
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voltage readback via an integrated 12-bit analog-to-digital converter (ADC),
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accessed using a PMBus interface.
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ADM1075, ADM1275, and ADM1276 are hot-swap controllers that allow a circuit
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board to be removed from or inserted into a live backplane. They also feature
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current and voltage readback via an integrated 12-bit analog-to-digital
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converter (ADC), accessed using a PMBus interface.
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The driver is a client driver to the core PMBus driver. Please see
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Documentation/hwmon/pmbus for details on PMBus client drivers.
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@ -36,6 +40,10 @@ This driver does not auto-detect devices. You will have to instantiate the
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devices explicitly. Please see Documentation/i2c/instantiating-devices for
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details.
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The ADM1075, unlike many other PMBus devices, does not support internal voltage
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or current scaling. Reported voltages, currents, and power are raw measurements,
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and will typically have to be scaled.
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Platform data support
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---------------------
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@ -51,7 +59,8 @@ The following attributes are supported. Limits are read-write, history reset
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attributes are write-only, all other attributes are read-only.
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in1_label "vin1" or "vout1" depending on chip variant and
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configuration.
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configuration. On ADM1075, vout1 reports the voltage on
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the VAUX pin.
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in1_input Measured voltage.
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in1_min Minumum Voltage.
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in1_max Maximum voltage.
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@ -74,3 +83,10 @@ curr1_crit Critical maximum current. Depending on the chip
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curr1_crit_alarm Critical current high alarm.
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curr1_highest Historical maximum current.
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curr1_reset_history Write any value to reset history.
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power1_label "pin1"
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power1_input Input power.
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power1_reset_history Write any value to reset history.
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Power attributes are supported on ADM1075 and ADM1276
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only.
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@ -31,8 +31,8 @@ config SENSORS_ADM1275
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default n
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help
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If you say yes here you get hardware monitoring support for Analog
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Devices ADM1275 and ADM1276 Hot-Swap Controller and Digital Power
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Monitor.
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Devices ADM1075, ADM1275, and ADM1276 Hot-Swap Controller and Digital
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Power Monitors.
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This driver can also be built as a module. If so, the module will
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be called adm1275.
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@ -23,7 +23,7 @@
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#include <linux/i2c.h>
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#include "pmbus.h"
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enum chips { adm1275, adm1276 };
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enum chips { adm1075, adm1275, adm1276 };
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#define ADM1275_PEAK_IOUT 0xd0
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#define ADM1275_PEAK_VIN 0xd1
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@ -32,6 +32,9 @@ enum chips { adm1275, adm1276 };
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#define ADM1275_VIN_VOUT_SELECT (1 << 6)
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#define ADM1275_VRANGE (1 << 5)
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#define ADM1075_IRANGE_50 (1 << 4)
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#define ADM1075_IRANGE_25 (1 << 3)
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#define ADM1075_IRANGE_MASK ((1 << 3) | (1 << 4))
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#define ADM1275_IOUT_WARN2_LIMIT 0xd7
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#define ADM1275_DEVICE_CONFIG 0xd8
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@ -42,6 +45,14 @@ enum chips { adm1275, adm1276 };
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#define ADM1275_MFR_STATUS_IOUT_WARN2 (1 << 0)
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#define ADM1075_READ_VAUX 0xdd
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#define ADM1075_VAUX_OV_WARN_LIMIT 0xde
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#define ADM1075_VAUX_UV_WARN_LIMIT 0xdf
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#define ADM1075_VAUX_STATUS 0xf6
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#define ADM1075_VAUX_OV_WARN (1<<7)
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#define ADM1075_VAUX_UV_WARN (1<<6)
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struct adm1275_data {
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int id;
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bool have_oc_fault;
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@ -74,6 +85,29 @@ static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
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}
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ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT);
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break;
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case PMBUS_VOUT_OV_WARN_LIMIT:
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if (data->id != adm1075) {
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ret = -ENODATA;
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break;
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}
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ret = pmbus_read_word_data(client, 0,
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ADM1075_VAUX_OV_WARN_LIMIT);
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break;
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case PMBUS_VOUT_UV_WARN_LIMIT:
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if (data->id != adm1075) {
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ret = -ENODATA;
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break;
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}
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ret = pmbus_read_word_data(client, 0,
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ADM1075_VAUX_UV_WARN_LIMIT);
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break;
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case PMBUS_READ_VOUT:
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if (data->id != adm1075) {
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ret = -ENODATA;
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break;
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}
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ret = pmbus_read_word_data(client, 0, ADM1075_READ_VAUX);
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break;
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case PMBUS_VIRT_READ_IOUT_MAX:
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ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_IOUT);
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break;
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@ -84,7 +118,7 @@ static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
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ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VIN);
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break;
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case PMBUS_VIRT_READ_PIN_MAX:
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if (data->id != adm1276) {
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if (data->id == adm1275) {
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ret = -ENXIO;
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break;
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}
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@ -95,7 +129,7 @@ static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
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case PMBUS_VIRT_RESET_VIN_HISTORY:
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break;
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case PMBUS_VIRT_RESET_PIN_HISTORY:
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if (data->id != adm1276)
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if (data->id == adm1275)
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ret = -ENXIO;
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break;
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default:
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@ -163,6 +197,19 @@ static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg)
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PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT;
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}
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break;
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case PMBUS_STATUS_VOUT:
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if (data->id != adm1075) {
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ret = -ENODATA;
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break;
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}
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ret = 0;
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mfr_status = pmbus_read_byte_data(client, 0,
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ADM1075_VAUX_STATUS);
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if (mfr_status & ADM1075_VAUX_OV_WARN)
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ret |= PB_VOLTAGE_OV_WARNING;
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if (mfr_status & ADM1075_VAUX_UV_WARN)
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ret |= PB_VOLTAGE_UV_WARNING;
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break;
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default:
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ret = -ENODATA;
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break;
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@ -171,6 +218,7 @@ static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg)
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}
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static const struct i2c_device_id adm1275_id[] = {
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{ "adm1075", adm1075 },
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{ "adm1275", adm1275 },
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{ "adm1276", adm1276 },
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{ }
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@ -251,7 +299,14 @@ static int adm1275_probe(struct i2c_client *client,
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info->read_byte_data = adm1275_read_byte_data;
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info->write_word_data = adm1275_write_word_data;
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if (config & ADM1275_VRANGE) {
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if (data->id == adm1075) {
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info->m[PSC_VOLTAGE_IN] = 27169;
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info->b[PSC_VOLTAGE_IN] = 0;
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info->R[PSC_VOLTAGE_IN] = -1;
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info->m[PSC_VOLTAGE_OUT] = 27169;
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info->b[PSC_VOLTAGE_OUT] = 0;
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info->R[PSC_VOLTAGE_OUT] = -1;
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} else if (config & ADM1275_VRANGE) {
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info->m[PSC_VOLTAGE_IN] = 19199;
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info->b[PSC_VOLTAGE_IN] = 0;
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info->R[PSC_VOLTAGE_IN] = -2;
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@ -271,6 +326,31 @@ static int adm1275_probe(struct i2c_client *client,
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data->have_oc_fault = true;
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switch (data->id) {
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case adm1075:
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info->format[PSC_POWER] = direct;
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info->b[PSC_POWER] = 0;
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info->R[PSC_POWER] = -1;
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switch (config & ADM1075_IRANGE_MASK) {
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case ADM1075_IRANGE_25:
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info->m[PSC_POWER] = 8549;
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info->m[PSC_CURRENT_OUT] = 806;
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break;
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case ADM1075_IRANGE_50:
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info->m[PSC_POWER] = 4279;
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info->m[PSC_CURRENT_OUT] = 404;
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break;
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default:
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dev_err(&client->dev, "Invalid input current range");
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info->m[PSC_POWER] = 0;
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info->m[PSC_CURRENT_OUT] = 0;
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break;
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}
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info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
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| PMBUS_HAVE_STATUS_INPUT;
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if (config & ADM1275_VIN_VOUT_SELECT)
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info->func[0] |=
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PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
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break;
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case adm1275:
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if (config & ADM1275_VIN_VOUT_SELECT)
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info->func[0] |=
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