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hwmon: (adm1275) Add support for ADM1278
ADM1278 is mostly compatible to other chips of the same series. Besides the usual difference in coefficients, it supports a temperature sensor, and it can measure both input and output voltage at the same time. Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck
parent
54ce3a0d80
commit
709066acdd
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@ -14,6 +14,10 @@ Supported chips:
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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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* Analog Devices ADM1278
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Prefix: 'adm1278'
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Addresses scanned: -
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Datasheet: www.analog.com/static/imported-files/data_sheets/ADM1278.pdf
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* Analog Devices ADM1293/ADM1294
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Prefix: 'adm1293', 'adm1294'
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Addresses scanned: -
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@ -26,12 +30,14 @@ Description
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-----------
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This driver supports hardware monitoring for Analog Devices ADM1075, ADM1275,
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ADM1276, ADM1293, and ADM1294 Hot-Swap Controller and Digital Power Monitors.
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ADM1276, ADM1278, ADM1293, and ADM1294 Hot-Swap Controller and Digital
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Power Monitors.
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ADM1075, ADM1275, ADM1276, ADM1293, and ADM1294 are hot-swap controllers that
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allow a circuit board to be removed from or inserted into a live backplane.
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They also feature current and voltage readback via an integrated 12
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bit analog-to-digital converter (ADC), accessed using a PMBus interface.
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ADM1075, ADM1275, ADM1276, ADM1278, ADM1293, and ADM1294 are hot-swap
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controllers that allow a circuit board to be removed from or inserted into
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a live backplane. They also feature current and voltage readback via an
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integrated 12 bit analog-to-digital converter (ADC), accessed using a
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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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@ -96,3 +102,14 @@ power1_reset_history Write any value to reset history.
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Power attributes are supported on ADM1075, ADM1276,
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ADM1293, and ADM1294.
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temp1_input Chip temperature.
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Temperature attributes are only available on ADM1278.
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temp1_max Maximum chip temperature.
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temp1_max_alarm Temperature alarm.
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temp1_crit Critical chip temperature.
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temp1_crit_alarm Critical temperature high alarm.
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temp1_highest Highest observed temperature.
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temp1_reset_history Write any value to reset history.
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Temperature attributes are supported on ADM1278.
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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 ADM1075, ADM1275, ADM1276, ADM1293, and ADM1294 Hot-Swap
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Controller and Digital Power Monitors.
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Devices ADM1075, ADM1275, ADM1276, ADM1278, ADM1293, and ADM1294
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Hot-Swap Controller and Digital 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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@ -24,7 +24,7 @@
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#include <linux/bitops.h>
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#include "pmbus.h"
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enum chips { adm1075, adm1275, adm1276, adm1293, adm1294 };
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enum chips { adm1075, adm1275, adm1276, adm1278, adm1293, adm1294 };
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#define ADM1275_MFR_STATUS_IOUT_WARN2 BIT(0)
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#define ADM1293_MFR_STATUS_VAUX_UV_WARN BIT(5)
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@ -41,6 +41,10 @@ enum chips { adm1075, adm1275, adm1276, adm1293, adm1294 };
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#define ADM1075_IRANGE_25 BIT(3)
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#define ADM1075_IRANGE_MASK (BIT(3) | BIT(4))
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#define ADM1278_TEMP1_EN BIT(3)
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#define ADM1278_VIN_EN BIT(2)
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#define ADM1278_VOUT_EN BIT(1)
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#define ADM1293_IRANGE_25 0
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#define ADM1293_IRANGE_50 BIT(6)
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#define ADM1293_IRANGE_100 BIT(7)
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@ -54,6 +58,7 @@ enum chips { adm1075, adm1275, adm1276, adm1293, adm1294 };
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#define ADM1293_VAUX_EN BIT(1)
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#define ADM1278_PEAK_TEMP 0xd7
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#define ADM1275_IOUT_WARN2_LIMIT 0xd7
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#define ADM1275_DEVICE_CONFIG 0xd8
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@ -80,6 +85,7 @@ struct adm1275_data {
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bool have_iout_min;
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bool have_pin_min;
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bool have_pin_max;
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bool have_temp_max;
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struct pmbus_driver_info info;
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};
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@ -113,6 +119,13 @@ static const struct coefficients adm1276_coefficients[] = {
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[4] = { 2115, 0, -1 }, /* power, vrange not set */
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};
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static const struct coefficients adm1278_coefficients[] = {
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[0] = { 19599, 0, -2 }, /* voltage */
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[1] = { 800, 20475, -1 }, /* current */
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[2] = { 6123, 0, -2 }, /* power */
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[3] = { 42, 31880, -1 }, /* temperature */
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};
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static const struct coefficients adm1293_coefficients[] = {
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[0] = { 3333, -1, 0 }, /* voltage, vrange 1.2V */
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[1] = { 5552, -5, -1 }, /* voltage, vrange 7.4V */
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@ -196,6 +209,11 @@ static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
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return -ENXIO;
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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_READ_TEMP_MAX:
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if (!data->have_temp_max)
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return -ENXIO;
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ret = pmbus_read_word_data(client, 0, ADM1278_PEAK_TEMP);
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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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@ -204,6 +222,10 @@ static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
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if (!data->have_pin_max)
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return -ENXIO;
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break;
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case PMBUS_VIRT_RESET_TEMP_HISTORY:
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if (!data->have_temp_max)
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return -ENXIO;
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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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@ -245,6 +267,9 @@ static int adm1275_write_word_data(struct i2c_client *client, int page, int reg,
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ret = pmbus_write_word_data(client, 0,
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ADM1293_PIN_MIN, 0);
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break;
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case PMBUS_VIRT_RESET_TEMP_HISTORY:
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ret = pmbus_write_word_data(client, 0, ADM1278_PEAK_TEMP, 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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@ -312,6 +337,7 @@ 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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{ "adm1278", adm1278 },
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{ "adm1293", adm1293 },
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{ "adm1294", adm1294 },
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{ }
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@ -329,6 +355,7 @@ static int adm1275_probe(struct i2c_client *client,
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const struct i2c_device_id *mid;
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const struct coefficients *coefficients;
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int vindex = -1, voindex = -1, cindex = -1, pindex = -1;
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int tindex = -1;
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if (!i2c_check_functionality(client->adapter,
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I2C_FUNC_SMBUS_READ_BYTE_DATA
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@ -386,6 +413,7 @@ static int adm1275_probe(struct i2c_client *client,
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info->format[PSC_VOLTAGE_OUT] = direct;
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info->format[PSC_CURRENT_OUT] = direct;
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info->format[PSC_POWER] = direct;
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info->format[PSC_TEMPERATURE] = direct;
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info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT;
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info->read_word_data = adm1275_read_word_data;
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@ -460,6 +488,27 @@ static int adm1275_probe(struct i2c_client *client,
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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 adm1278:
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data->have_vout = true;
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data->have_pin_max = true;
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data->have_temp_max = true;
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coefficients = adm1278_coefficients;
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vindex = 0;
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cindex = 1;
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pindex = 2;
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tindex = 3;
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info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT;
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if (config & ADM1278_TEMP1_EN)
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info->func[0] |=
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PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
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if (config & ADM1278_VIN_EN)
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info->func[0] |= PMBUS_HAVE_VIN;
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if (config & ADM1278_VOUT_EN)
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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 adm1293:
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case adm1294:
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data->have_iout_min = true;
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@ -537,6 +586,11 @@ static int adm1275_probe(struct i2c_client *client,
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info->b[PSC_POWER] = coefficients[pindex].b;
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info->R[PSC_POWER] = coefficients[pindex].R;
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}
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if (tindex >= 0) {
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info->m[PSC_TEMPERATURE] = coefficients[tindex].m;
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info->b[PSC_TEMPERATURE] = coefficients[tindex].b;
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info->R[PSC_TEMPERATURE] = coefficients[tindex].R;
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}
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return pmbus_do_probe(client, id, info);
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}
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