Add support for voltage and current peak (historic maximum) attributes.
Signed-off-by: Guenter Roeck <guenter.roeck@xxxxxxxxxxxx>
---
v2: Updated documentation
Documentation/hwmon/adm1275 | 8 ++++-
drivers/hwmon/pmbus/adm1275.c | 60 +++++++++++++++++++++++++++++++++++++++++
2 files changed, 66 insertions(+), 2 deletions(-)
diff --git a/Documentation/hwmon/adm1275 b/Documentation/hwmon/adm1275
index 6a3a647..f2bf8b9 100644
--- a/Documentation/hwmon/adm1275
+++ b/Documentation/hwmon/adm1275
@@ -43,8 +43,8 @@ Documentation/hwmon/pmbus for details.
Sysfs entries
-------------
-The following attributes are supported. Limits are read-write; all other
-attributes are read-only.
+The following attributes are supported. Limits and are read-write, history reset
+attributes are write-only, all other attributes are read-only.
in1_label "vin1" or "vout1" depending on chip variant and
configuration.
@@ -53,8 +53,12 @@ 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_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_highest Historical maximum current.
+curr1_reset_history Write any value to reset history.
diff --git a/drivers/hwmon/pmbus/adm1275.c b/drivers/hwmon/pmbus/adm1275.c
index 1a91d51..7ca18be 100644
--- a/drivers/hwmon/pmbus/adm1275.c
+++ b/drivers/hwmon/pmbus/adm1275.c
@@ -23,11 +23,68 @@
#include <linux/i2c.h>
#include "pmbus.h"
+#define ADM1275_PEAK_IOUT 0xd0
+#define ADM1275_PEAK_VIN 0xd1
+#define ADM1275_PEAK_VOUT 0xd2
#define ADM1275_PMON_CONFIG 0xd4
#define ADM1275_VIN_VOUT_SELECT (1 << 6)
#define ADM1275_VRANGE (1 << 5)
+static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
+{
+ int ret;
+
+ if (page)
+ return -EINVAL;
+
+ switch (reg) {
+ case PMBUS_VIRT_READ_IOUT_MAX:
+ ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_IOUT);
+ break;
+ case PMBUS_VIRT_READ_VOUT_MAX:
+ ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VOUT);
+ break;
+ case PMBUS_VIRT_READ_VIN_MAX:
+ ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VIN);
+ break;
+ case PMBUS_VIRT_RESET_IOUT_HISTORY:
+ case PMBUS_VIRT_RESET_VOUT_HISTORY:
+ case PMBUS_VIRT_RESET_VIN_HISTORY:
+ ret = 0;
+ break;
+ default:
+ ret = -ENODATA;
+ break;
+ }
+ return ret;
+}
+
+static int adm1275_write_word_data(struct i2c_client *client, int page, int reg,
+ u16 word)
+{
+ int ret;
+
+ if (page)
+ return -EINVAL;
+
+ switch (reg) {
+ case PMBUS_VIRT_RESET_IOUT_HISTORY:
+ ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_IOUT, 0);
+ break;
+ case PMBUS_VIRT_RESET_VOUT_HISTORY:
+ ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VOUT, 0);
+ break;
+ case PMBUS_VIRT_RESET_VIN_HISTORY:
+ ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VIN, 0);
+ break;
+ default:
+ ret = -ENODATA;
+ break;
+ }
+ return ret;
+}
+
static int adm1275_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@@ -58,6 +115,9 @@ static int adm1275_probe(struct i2c_client *client,
info->R[PSC_CURRENT_OUT] = -1;
info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT;
+ info->read_word_data = adm1275_read_word_data;
+ info->write_word_data = adm1275_write_word_data;
+
if (config & ADM1275_VRANGE) {
info->m[PSC_VOLTAGE_IN] = 19045;
info->b[PSC_VOLTAGE_IN] = 0;
--
1.7.3.1
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