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hwmon: (adm1275) Add support for ADM1075

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
hifive-unleashed-5.1
Guenter Roeck 2012-02-24 03:40:53 -08:00 committed by Guenter Roeck
parent 590defe59e
commit 9271126966
3 changed files with 109 additions and 13 deletions

View File

@ -2,6 +2,10 @@ Kernel driver adm1275
===================== =====================
Supported chips: Supported chips:
* Analog Devices ADM1075
Prefix: 'adm1075'
Addresses scanned: -
Datasheet: www.analog.com/static/imported-files/data_sheets/ADM1075.pdf
* Analog Devices ADM1275 * Analog Devices ADM1275
Prefix: 'adm1275' Prefix: 'adm1275'
Addresses scanned: - Addresses scanned: -
@ -17,13 +21,13 @@ Author: Guenter Roeck <guenter.roeck@ericsson.com>
Description Description
----------- -----------
This driver supports hardware montoring for Analog Devices ADM1275 and ADM1276 This driver supports hardware montoring for Analog Devices ADM1075, ADM1275,
Hot-Swap Controller and Digital Power Monitor. and ADM1276 Hot-Swap Controller and Digital Power Monitor.
ADM1275 and ADM1276 are hot-swap controllers that allow a circuit board to be ADM1075, ADM1275, and ADM1276 are hot-swap controllers that allow a circuit
removed from or inserted into a live backplane. They also feature current and board to be removed from or inserted into a live backplane. They also feature
voltage readback via an integrated 12-bit analog-to-digital converter (ADC), current and voltage readback via an integrated 12-bit analog-to-digital
accessed using a PMBus interface. converter (ADC), accessed using a PMBus interface.
The driver is a client driver to the core PMBus driver. Please see The driver is a client driver to the core PMBus driver. Please see
Documentation/hwmon/pmbus for details on PMBus client drivers. Documentation/hwmon/pmbus for details on PMBus client drivers.
@ -36,6 +40,10 @@ This driver does not auto-detect devices. You will have to instantiate the
devices explicitly. Please see Documentation/i2c/instantiating-devices for devices explicitly. Please see Documentation/i2c/instantiating-devices for
details. details.
The ADM1075, unlike many other PMBus devices, does not support internal voltage
or current scaling. Reported voltages, currents, and power are raw measurements,
and will typically have to be scaled.
Platform data support Platform data support
--------------------- ---------------------
@ -51,7 +59,8 @@ The following attributes are supported. Limits are read-write, history reset
attributes are write-only, all other attributes are read-only. attributes are write-only, all other attributes are read-only.
in1_label "vin1" or "vout1" depending on chip variant and in1_label "vin1" or "vout1" depending on chip variant and
configuration. configuration. On ADM1075, vout1 reports the voltage on
the VAUX pin.
in1_input Measured voltage. in1_input Measured voltage.
in1_min Minumum Voltage. in1_min Minumum Voltage.
in1_max Maximum voltage. in1_max Maximum voltage.
@ -74,3 +83,10 @@ curr1_crit Critical maximum current. Depending on the chip
curr1_crit_alarm Critical current high alarm. curr1_crit_alarm Critical current high alarm.
curr1_highest Historical maximum current. curr1_highest Historical maximum current.
curr1_reset_history Write any value to reset history. curr1_reset_history Write any value to reset history.
power1_label "pin1"
power1_input Input power.
power1_reset_history Write any value to reset history.
Power attributes are supported on ADM1075 and ADM1276
only.

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@ -31,8 +31,8 @@ config SENSORS_ADM1275
default n default n
help help
If you say yes here you get hardware monitoring support for Analog If you say yes here you get hardware monitoring support for Analog
Devices ADM1275 and ADM1276 Hot-Swap Controller and Digital Power Devices ADM1075, ADM1275, and ADM1276 Hot-Swap Controller and Digital
Monitor. Power Monitors.
This driver can also be built as a module. If so, the module will This driver can also be built as a module. If so, the module will
be called adm1275. be called adm1275.

View File

@ -23,7 +23,7 @@
#include <linux/i2c.h> #include <linux/i2c.h>
#include "pmbus.h" #include "pmbus.h"
enum chips { adm1275, adm1276 }; enum chips { adm1075, adm1275, adm1276 };
#define ADM1275_PEAK_IOUT 0xd0 #define ADM1275_PEAK_IOUT 0xd0
#define ADM1275_PEAK_VIN 0xd1 #define ADM1275_PEAK_VIN 0xd1
@ -32,6 +32,9 @@ enum chips { adm1275, adm1276 };
#define ADM1275_VIN_VOUT_SELECT (1 << 6) #define ADM1275_VIN_VOUT_SELECT (1 << 6)
#define ADM1275_VRANGE (1 << 5) #define ADM1275_VRANGE (1 << 5)
#define ADM1075_IRANGE_50 (1 << 4)
#define ADM1075_IRANGE_25 (1 << 3)
#define ADM1075_IRANGE_MASK ((1 << 3) | (1 << 4))
#define ADM1275_IOUT_WARN2_LIMIT 0xd7 #define ADM1275_IOUT_WARN2_LIMIT 0xd7
#define ADM1275_DEVICE_CONFIG 0xd8 #define ADM1275_DEVICE_CONFIG 0xd8
@ -42,6 +45,14 @@ enum chips { adm1275, adm1276 };
#define ADM1275_MFR_STATUS_IOUT_WARN2 (1 << 0) #define ADM1275_MFR_STATUS_IOUT_WARN2 (1 << 0)
#define ADM1075_READ_VAUX 0xdd
#define ADM1075_VAUX_OV_WARN_LIMIT 0xde
#define ADM1075_VAUX_UV_WARN_LIMIT 0xdf
#define ADM1075_VAUX_STATUS 0xf6
#define ADM1075_VAUX_OV_WARN (1<<7)
#define ADM1075_VAUX_UV_WARN (1<<6)
struct adm1275_data { struct adm1275_data {
int id; int id;
bool have_oc_fault; bool have_oc_fault;
@ -74,6 +85,29 @@ static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
} }
ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT); ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT);
break; break;
case PMBUS_VOUT_OV_WARN_LIMIT:
if (data->id != adm1075) {
ret = -ENODATA;
break;
}
ret = pmbus_read_word_data(client, 0,
ADM1075_VAUX_OV_WARN_LIMIT);
break;
case PMBUS_VOUT_UV_WARN_LIMIT:
if (data->id != adm1075) {
ret = -ENODATA;
break;
}
ret = pmbus_read_word_data(client, 0,
ADM1075_VAUX_UV_WARN_LIMIT);
break;
case PMBUS_READ_VOUT:
if (data->id != adm1075) {
ret = -ENODATA;
break;
}
ret = pmbus_read_word_data(client, 0, ADM1075_READ_VAUX);
break;
case PMBUS_VIRT_READ_IOUT_MAX: case PMBUS_VIRT_READ_IOUT_MAX:
ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_IOUT); ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_IOUT);
break; break;
@ -84,7 +118,7 @@ static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VIN); ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VIN);
break; break;
case PMBUS_VIRT_READ_PIN_MAX: case PMBUS_VIRT_READ_PIN_MAX:
if (data->id != adm1276) { if (data->id == adm1275) {
ret = -ENXIO; ret = -ENXIO;
break; break;
} }
@ -95,7 +129,7 @@ static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
case PMBUS_VIRT_RESET_VIN_HISTORY: case PMBUS_VIRT_RESET_VIN_HISTORY:
break; break;
case PMBUS_VIRT_RESET_PIN_HISTORY: case PMBUS_VIRT_RESET_PIN_HISTORY:
if (data->id != adm1276) if (data->id == adm1275)
ret = -ENXIO; ret = -ENXIO;
break; break;
default: default:
@ -163,6 +197,19 @@ static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg)
PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT; PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT;
} }
break; break;
case PMBUS_STATUS_VOUT:
if (data->id != adm1075) {
ret = -ENODATA;
break;
}
ret = 0;
mfr_status = pmbus_read_byte_data(client, 0,
ADM1075_VAUX_STATUS);
if (mfr_status & ADM1075_VAUX_OV_WARN)
ret |= PB_VOLTAGE_OV_WARNING;
if (mfr_status & ADM1075_VAUX_UV_WARN)
ret |= PB_VOLTAGE_UV_WARNING;
break;
default: default:
ret = -ENODATA; ret = -ENODATA;
break; break;
@ -171,6 +218,7 @@ static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg)
} }
static const struct i2c_device_id adm1275_id[] = { static const struct i2c_device_id adm1275_id[] = {
{ "adm1075", adm1075 },
{ "adm1275", adm1275 }, { "adm1275", adm1275 },
{ "adm1276", adm1276 }, { "adm1276", adm1276 },
{ } { }
@ -251,7 +299,14 @@ static int adm1275_probe(struct i2c_client *client,
info->read_byte_data = adm1275_read_byte_data; info->read_byte_data = adm1275_read_byte_data;
info->write_word_data = adm1275_write_word_data; info->write_word_data = adm1275_write_word_data;
if (config & ADM1275_VRANGE) { if (data->id == adm1075) {
info->m[PSC_VOLTAGE_IN] = 27169;
info->b[PSC_VOLTAGE_IN] = 0;
info->R[PSC_VOLTAGE_IN] = -1;
info->m[PSC_VOLTAGE_OUT] = 27169;
info->b[PSC_VOLTAGE_OUT] = 0;
info->R[PSC_VOLTAGE_OUT] = -1;
} else if (config & ADM1275_VRANGE) {
info->m[PSC_VOLTAGE_IN] = 19199; info->m[PSC_VOLTAGE_IN] = 19199;
info->b[PSC_VOLTAGE_IN] = 0; info->b[PSC_VOLTAGE_IN] = 0;
info->R[PSC_VOLTAGE_IN] = -2; info->R[PSC_VOLTAGE_IN] = -2;
@ -271,6 +326,31 @@ static int adm1275_probe(struct i2c_client *client,
data->have_oc_fault = true; data->have_oc_fault = true;
switch (data->id) { switch (data->id) {
case adm1075:
info->format[PSC_POWER] = direct;
info->b[PSC_POWER] = 0;
info->R[PSC_POWER] = -1;
switch (config & ADM1075_IRANGE_MASK) {
case ADM1075_IRANGE_25:
info->m[PSC_POWER] = 8549;
info->m[PSC_CURRENT_OUT] = 806;
break;
case ADM1075_IRANGE_50:
info->m[PSC_POWER] = 4279;
info->m[PSC_CURRENT_OUT] = 404;
break;
default:
dev_err(&client->dev, "Invalid input current range");
info->m[PSC_POWER] = 0;
info->m[PSC_CURRENT_OUT] = 0;
break;
}
info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
| PMBUS_HAVE_STATUS_INPUT;
if (config & ADM1275_VIN_VOUT_SELECT)
info->func[0] |=
PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
break;
case adm1275: case adm1275:
if (config & ADM1275_VIN_VOUT_SELECT) if (config & ADM1275_VIN_VOUT_SELECT)
info->func[0] |= info->func[0] |=