Add support for voltage, current, and temperature peak (historic maximum)
attributes.
Signed-off-by: Guenter Roeck <guenter.roeck@xxxxxxxxxxxx>
---
drivers/hwmon/pmbus/max8688.c | 61 +++++++++++++++++++++++++++++++++++++++++
1 files changed, 61 insertions(+), 0 deletions(-)
diff --git a/drivers/hwmon/pmbus/max8688.c b/drivers/hwmon/pmbus/max8688.c
index ddc8a64..c3e72f1 100644
--- a/drivers/hwmon/pmbus/max8688.c
+++ b/drivers/hwmon/pmbus/max8688.c
@@ -25,6 +25,9 @@
#include <linux/i2c.h>
#include "pmbus.h"
+#define MAX8688_MFR_VOUT_PEAK 0xd4
+#define MAX8688_MFR_IOUT_PEAK 0xd5
+#define MAX8688_MFR_TEMPERATURE_PEAK 0xd6
#define MAX8688_MFG_STATUS 0xd8
#define MAX8688_STATUS_OC_FAULT (1 << 4)
@@ -37,6 +40,62 @@
#define MAX8688_STATUS_OT_FAULT (1 << 13)
#define MAX8688_STATUS_OT_WARNING (1 << 14)
+static int max8688_read_word_data(struct i2c_client *client, int page, int reg)
+{
+ int ret;
+
+ if (page)
+ return -EINVAL;
+
+ switch (reg) {
+ case PMBUS_VIRT_READ_VOUT_MAX:
+ ret = pmbus_read_word_data(client, 0, MAX8688_MFR_VOUT_PEAK);
+ break;
+ case PMBUS_VIRT_READ_IOUT_MAX:
+ ret = pmbus_read_word_data(client, 0, MAX8688_MFR_IOUT_PEAK);
+ break;
+ case PMBUS_VIRT_READ_TEMP_MAX:
+ ret = pmbus_read_word_data(client, 0,
+ MAX8688_MFR_TEMPERATURE_PEAK);
+ break;
+ case PMBUS_VIRT_RESET_VOUT_HISTORY:
+ case PMBUS_VIRT_RESET_IOUT_HISTORY:
+ case PMBUS_VIRT_RESET_TEMP_HISTORY:
+ ret = 0;
+ break;
+ default:
+ ret = -ENODATA;
+ break;
+ }
+ return ret;
+}
+
+static int max8688_write_word_data(struct i2c_client *client, int page, int reg,
+ u16 word)
+{
+ int ret;
+
+ switch (reg) {
+ case PMBUS_VIRT_RESET_VOUT_HISTORY:
+ ret = pmbus_write_word_data(client, 0, MAX8688_MFR_VOUT_PEAK,
+ 0);
+ break;
+ case PMBUS_VIRT_RESET_IOUT_HISTORY:
+ ret = pmbus_write_word_data(client, 0, MAX8688_MFR_IOUT_PEAK,
+ 0);
+ break;
+ case PMBUS_VIRT_RESET_TEMP_HISTORY:
+ ret = pmbus_write_word_data(client, 0,
+ MAX8688_MFR_TEMPERATURE_PEAK,
+ 0xffff);
+ break;
+ default:
+ ret = -ENODATA;
+ break;
+ }
+ return ret;
+}
+
static int max8688_read_byte_data(struct i2c_client *client, int page, int reg)
{
int ret = 0;
@@ -111,6 +170,8 @@ static struct pmbus_driver_info max8688_info = {
| PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT
| PMBUS_HAVE_STATUS_TEMP,
.read_byte_data = max8688_read_byte_data,
+ .read_word_data = max8688_read_word_data,
+ .write_word_data = max8688_write_word_data,
};
static int max8688_probe(struct i2c_client *client,
--
1.7.3.1
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