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hwmon: (pmbus/adm1275) Add support for ADM1276
ADM1276 is mostly compatible to ADM1275, with added support for input power measurement. Add support for it to the ADM1275 driver. Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com> Acked-by: Jean Delvare <khali@linux-fr.org>
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Guenter Roeck
parent
c5e6763667
commit
5cf231a346
@ -6,6 +6,10 @@ Supported chips:
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Prefix: 'adm1275'
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Addresses scanned: -
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Datasheet: www.analog.com/static/imported-files/data_sheets/ADM1275.pdf
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* Analog Devices ADM1276
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Prefix: 'adm1276'
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Addresses scanned: -
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Datasheet: www.analog.com/static/imported-files/data_sheets/ADM1276.pdf
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Author: Guenter Roeck <guenter.roeck@ericsson.com>
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@ -13,13 +17,13 @@ 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 Hot-Swap
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Controller and Digital Power Monitor.
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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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The ADM1275 is a hot-swap controller that allows a circuit board to be removed
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from or inserted into a live backplane. It also features current and voltage
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readback via an integrated 12-bit analog-to-digital converter (ADC), accessed
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using a PMBus. interface.
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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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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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@ -48,18 +52,18 @@ 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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in1_input Measured voltage. From READ_VOUT register.
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in1_min Minumum Voltage. From VOUT_UV_WARN_LIMIT register.
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in1_max Maximum voltage. From VOUT_OV_WARN_LIMIT register.
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in1_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status.
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in1_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status.
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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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in1_min_alarm Voltage low alarm.
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in1_max_alarm Voltage high alarm.
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in1_highest Historical maximum voltage.
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in1_reset_history Write any value to reset history.
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curr1_label "iout1"
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curr1_input Measured current. From READ_IOUT register.
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curr1_max Maximum current. From IOUT_OC_WARN_LIMIT register.
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curr1_max_alarm Current high alarm. From IOUT_OC_WARN_LIMIT register.
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curr1_input Measured current.
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curr1_max Maximum current.
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curr1_max_alarm Current high alarm.
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curr1_lcrit Critical minimum current. Depending on the chip
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configuration, either curr1_lcrit or curr1_crit is
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supported, but not both.
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@ -26,11 +26,12 @@ config SENSORS_PMBUS
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be called pmbus.
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config SENSORS_ADM1275
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tristate "Analog Devices ADM1275"
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tristate "Analog Devices ADM1275 and compatibles"
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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 Hot-Swap Controller and Digital Power Monitor.
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Devices ADM1275 and ADM1276 Hot-Swap Controller and Digital Power
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Monitor.
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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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@ -23,6 +23,8 @@
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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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#define ADM1275_PEAK_IOUT 0xd0
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#define ADM1275_PEAK_VIN 0xd1
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#define ADM1275_PEAK_VOUT 0xd2
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@ -36,9 +38,12 @@
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#define ADM1275_IOUT_WARN2_SELECT (1 << 4)
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#define ADM1276_PEAK_PIN 0xda
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#define ADM1275_MFR_STATUS_IOUT_WARN2 (1 << 0)
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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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struct pmbus_driver_info info;
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};
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@ -49,7 +54,7 @@ static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
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{
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const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
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const struct adm1275_data *data = to_adm1275_data(info);
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int ret;
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int ret = 0;
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if (page)
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return -ENXIO;
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@ -78,10 +83,20 @@ static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
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case PMBUS_VIRT_READ_VIN_MAX:
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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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ret = -ENXIO;
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break;
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}
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ret = pmbus_read_word_data(client, 0, ADM1276_PEAK_PIN);
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break;
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case PMBUS_VIRT_RESET_IOUT_HISTORY:
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case PMBUS_VIRT_RESET_VOUT_HISTORY:
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case PMBUS_VIRT_RESET_VIN_HISTORY:
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ret = 0;
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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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ret = -ENXIO;
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break;
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default:
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ret = -ENODATA;
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@ -113,6 +128,9 @@ static int adm1275_write_word_data(struct i2c_client *client, int page, int reg,
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case PMBUS_VIRT_RESET_VIN_HISTORY:
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ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VIN, 0);
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break;
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case PMBUS_VIRT_RESET_PIN_HISTORY:
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ret = pmbus_write_word_data(client, 0, ADM1276_PEAK_PIN, 0);
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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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@ -180,6 +198,7 @@ static int adm1275_probe(struct i2c_client *client,
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goto err_mem;
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}
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data->id = id->driver_data;
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info = &data->info;
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info->pages = 1;
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@ -214,10 +233,33 @@ static int adm1275_probe(struct i2c_client *client,
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if (device_config & ADM1275_IOUT_WARN2_SELECT)
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data->have_oc_fault = true;
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if (config & ADM1275_VIN_VOUT_SELECT)
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info->func[0] |= PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
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else
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info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
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switch (id->driver_data) {
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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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PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
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else
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info->func[0] |=
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PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
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break;
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case adm1276:
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info->format[PSC_POWER] = direct;
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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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if (config & ADM1275_VRANGE) {
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info->m[PSC_POWER] = 6043;
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info->b[PSC_POWER] = 0;
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info->R[PSC_POWER] = -2;
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} else {
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info->m[PSC_POWER] = 2115;
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info->b[PSC_POWER] = 0;
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info->R[PSC_POWER] = -1;
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}
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break;
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}
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ret = pmbus_do_probe(client, id, info);
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if (ret)
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@ -240,7 +282,8 @@ static int adm1275_remove(struct i2c_client *client)
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}
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static const struct i2c_device_id adm1275_id[] = {
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{"adm1275", 0},
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{ "adm1275", adm1275 },
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{ "adm1276", adm1276 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, adm1275_id);
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@ -265,7 +308,7 @@ static void __exit adm1275_exit(void)
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}
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MODULE_AUTHOR("Guenter Roeck");
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MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275");
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MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275 and compatibles");
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MODULE_LICENSE("GPL");
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module_init(adm1275_init);
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module_exit(adm1275_exit);
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