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@xxxxxxxxxxxx>
---
Documentation/hwmon/adm1275 | 32 ++++++++++++---------
drivers/hwmon/pmbus/Kconfig | 5 ++-
drivers/hwmon/pmbus/adm1275.c | 59 +++++++++++++++++++++++++++++++++++-----
3 files changed, 72 insertions(+), 24 deletions(-)
diff --git a/Documentation/hwmon/adm1275 b/Documentation/hwmon/adm1275
index c438c98..ab70d96 100644
--- a/Documentation/hwmon/adm1275
+++ b/Documentation/hwmon/adm1275
@@ -6,6 +6,10 @@ Supported chips:
Prefix: 'adm1275'
Addresses scanned: -
Datasheet: www.analog.com/static/imported-files/data_sheets/ADM1275.pdf
+ * Analog Devices ADM1276
+ Prefix: 'adm1276'
+ Addresses scanned: -
+ Datasheet: www.analog.com/static/imported-files/data_sheets/ADM1276.pdf
Author: Guenter Roeck <guenter.roeck@xxxxxxxxxxxx>
@@ -13,13 +17,13 @@ Author: Guenter Roeck <guenter.roeck@xxxxxxxxxxxx>
Description
-----------
-This driver supports hardware montoring for Analog Devices ADM1275 Hot-Swap
-Controller and Digital Power Monitor.
+This driver supports hardware montoring for Analog Devices ADM1275 and ADM1276
+Hot-Swap Controller and Digital Power Monitor.
-The ADM1275 is a hot-swap controller that allows a circuit board to be removed
-from or inserted into a live backplane. It also features current and voltage
-readback via an integrated 12-bit analog-to-digital converter (ADC), accessed
-using a PMBus. interface.
+ADM1275 and ADM1276 are hot-swap controllers that allow a circuit board to be
+removed from or inserted into a live backplane. They also feature current and
+voltage readback via an integrated 12-bit analog-to-digital converter (ADC),
+accessed using a PMBus interface.
The driver is a client driver to the core PMBus driver. Please see
Documentation/hwmon/pmbus for details on PMBus client drivers.
@@ -48,18 +52,18 @@ attributes are write-only, all other attributes are read-only.
in1_label "vin1" or "vout1" depending on chip variant and
configuration.
-in1_input Measured voltage. From READ_VOUT register.
-in1_min Minumum Voltage. From VOUT_UV_WARN_LIMIT register.
-in1_max Maximum voltage. From VOUT_OV_WARN_LIMIT register.
-in1_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status.
-in1_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status.
+in1_input Measured voltage.
+in1_min Minumum Voltage.
+in1_max Maximum voltage.
+in1_min_alarm Voltage low alarm.
+in1_max_alarm Voltage high alarm.
in1_highest Historical maximum voltage.
in1_reset_history Write any value to reset history.
curr1_label "iout1"
-curr1_input Measured current. From READ_IOUT register.
-curr1_max Maximum current. From IOUT_OC_WARN_LIMIT register.
-curr1_max_alarm Current high alarm. From IOUT_OC_WARN_LIMIT register.
+curr1_input Measured current.
+curr1_max Maximum current.
+curr1_max_alarm Current high alarm.
curr1_lcrit Critical minimum current. Depending on the chip
configuration, either curr1_lcrit or curr1_crit is
supported, but not both.
diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
index c9237b9..3757558 100644
--- a/drivers/hwmon/pmbus/Kconfig
+++ b/drivers/hwmon/pmbus/Kconfig
@@ -26,11 +26,12 @@ config SENSORS_PMBUS
be called pmbus.
config SENSORS_ADM1275
- tristate "Analog Devices ADM1275"
+ tristate "Analog Devices ADM1275 and compatibles"
default n
help
If you say yes here you get hardware monitoring support for Analog
- Devices ADM1275 Hot-Swap Controller and Digital Power Monitor.
+ Devices ADM1275 and ADM1276 Hot-Swap Controller and Digital Power
+ Monitor.
This driver can also be built as a module. If so, the module will
be called adm1275.
diff --git a/drivers/hwmon/pmbus/adm1275.c b/drivers/hwmon/pmbus/adm1275.c
index 7a9f2d9..fa18112 100644
--- a/drivers/hwmon/pmbus/adm1275.c
+++ b/drivers/hwmon/pmbus/adm1275.c
@@ -23,6 +23,8 @@
#include <linux/i2c.h>
#include "pmbus.h"
+enum chips { adm1275, adm1276 };
+
#define ADM1275_PEAK_IOUT 0xd0
#define ADM1275_PEAK_VIN 0xd1
#define ADM1275_PEAK_VOUT 0xd2
@@ -36,9 +38,12 @@
#define ADM1275_IOUT_WARN2_SELECT (1 << 4)
+#define ADM1276_PEAK_PIN 0xda
+
#define ADM1275_MFR_STATUS_IOUT_WARN2 (1 << 0)
struct adm1275_data {
+ int id;
bool have_oc_fault;
struct pmbus_driver_info info;
};
@@ -49,7 +54,7 @@ static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
{
const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
const struct adm1275_data *data = to_adm1275_data(info);
- int ret;
+ int ret = 0;
if (page)
return -ENXIO;
@@ -78,10 +83,20 @@ static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
case PMBUS_VIRT_READ_VIN_MAX:
ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VIN);
break;
+ case PMBUS_VIRT_READ_PIN_MAX:
+ if (data->id != adm1276) {
+ ret = -ENXIO;
+ break;
+ }
+ ret = pmbus_read_word_data(client, 0, ADM1276_PEAK_PIN);
+ break;
case PMBUS_VIRT_RESET_IOUT_HISTORY:
case PMBUS_VIRT_RESET_VOUT_HISTORY:
case PMBUS_VIRT_RESET_VIN_HISTORY:
- ret = 0;
+ break;
+ case PMBUS_VIRT_RESET_PIN_HISTORY:
+ if (data->id != adm1276)
+ ret = -ENXIO;
break;
default:
ret = -ENODATA;
@@ -113,6 +128,9 @@ static int adm1275_write_word_data(struct i2c_client *client, int page, int reg,
case PMBUS_VIRT_RESET_VIN_HISTORY:
ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VIN, 0);
break;
+ case PMBUS_VIRT_RESET_PIN_HISTORY:
+ ret = pmbus_write_word_data(client, 0, ADM1276_PEAK_PIN, 0);
+ break;
default:
ret = -ENODATA;
break;
@@ -180,6 +198,7 @@ static int adm1275_probe(struct i2c_client *client,
goto err_mem;
}
+ data->id = id->driver_data;
info = &data->info;
info->pages = 1;
@@ -214,10 +233,33 @@ static int adm1275_probe(struct i2c_client *client,
if (device_config & ADM1275_IOUT_WARN2_SELECT)
data->have_oc_fault = true;
- if (config & ADM1275_VIN_VOUT_SELECT)
- info->func[0] |= PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
- else
- info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
+ switch (id->driver_data) {
+ case adm1275:
+ if (config & ADM1275_VIN_VOUT_SELECT)
+ info->func[0] |=
+ PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
+ else
+ info->func[0] |=
+ PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
+ break;
+ case adm1276:
+ info->format[PSC_POWER] = direct;
+ 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;
+ if (config & ADM1275_VRANGE) {
+ info->m[PSC_POWER] = 6043;
+ info->b[PSC_POWER] = 0;
+ info->R[PSC_POWER] = -2;
+ } else {
+ info->m[PSC_POWER] = 2115;
+ info->b[PSC_POWER] = 0;
+ info->R[PSC_POWER] = -1;
+ }
+ break;
+ }
ret = pmbus_do_probe(client, id, info);
if (ret)
@@ -240,7 +282,8 @@ static int adm1275_remove(struct i2c_client *client)
}
static const struct i2c_device_id adm1275_id[] = {
- {"adm1275", 0},
+ { "adm1275", adm1275 },
+ { "adm1276", adm1276 },
{ }
};
MODULE_DEVICE_TABLE(i2c, adm1275_id);
@@ -265,7 +308,7 @@ static void __exit adm1275_exit(void)
}
MODULE_AUTHOR("Guenter Roeck");
-MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275");
+MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275 and compatibles");
MODULE_LICENSE("GPL");
module_init(adm1275_init);
module_exit(adm1275_exit);
--
1.7.3.1
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