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authorGuenter Roeck <guenter.roeck@ericsson.com>2011-07-10 00:10:19 +0400
committerGuenter Roeck <guenter.roeck@ericsson.com>2011-07-29 04:09:53 +0400
commit8ebed854506301f4f67e75c73cae967d4a45ab4d (patch)
tree931d27507b081f39551cc1092b5db6fd1812f9a0 /drivers/hwmon
parentc576e30cd0c9814b3b45772d46924d796f538dee (diff)
downloadlinux-8ebed854506301f4f67e75c73cae967d4a45ab4d.tar.xz
hwmon: (max16064) Add support for peak attributes
Add support for voltage and temperature peak (historic maximum) attributes. Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com> Reviewed-by: Robert Coulson <robert.coulson@ericsson.com>
Diffstat (limited to 'drivers/hwmon')
-rw-r--r--drivers/hwmon/pmbus/max16064.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/drivers/hwmon/pmbus/max16064.c b/drivers/hwmon/pmbus/max16064.c
index 78e20bca53a9..e50b296e8db4 100644
--- a/drivers/hwmon/pmbus/max16064.c
+++ b/drivers/hwmon/pmbus/max16064.c
@@ -25,6 +25,55 @@
#include <linux/i2c.h>
#include "pmbus.h"
+#define MAX16064_MFR_VOUT_PEAK 0xd4
+#define MAX16064_MFR_TEMPERATURE_PEAK 0xd6
+
+static int max16064_read_word_data(struct i2c_client *client, int page, int reg)
+{
+ int ret;
+
+ switch (reg) {
+ case PMBUS_VIRT_READ_VOUT_MAX:
+ ret = pmbus_read_word_data(client, page,
+ MAX16064_MFR_VOUT_PEAK);
+ break;
+ case PMBUS_VIRT_READ_TEMP_MAX:
+ ret = pmbus_read_word_data(client, page,
+ MAX16064_MFR_TEMPERATURE_PEAK);
+ break;
+ case PMBUS_VIRT_RESET_VOUT_HISTORY:
+ case PMBUS_VIRT_RESET_TEMP_HISTORY:
+ ret = 0;
+ break;
+ default:
+ ret = -ENODATA;
+ break;
+ }
+ return ret;
+}
+
+static int max16064_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, page,
+ MAX16064_MFR_VOUT_PEAK, 0);
+ break;
+ case PMBUS_VIRT_RESET_TEMP_HISTORY:
+ ret = pmbus_write_word_data(client, page,
+ MAX16064_MFR_TEMPERATURE_PEAK,
+ 0xffff);
+ break;
+ default:
+ ret = -ENODATA;
+ break;
+ }
+ return ret;
+}
+
static struct pmbus_driver_info max16064_info = {
.pages = 4,
.format[PSC_VOLTAGE_IN] = direct,
@@ -44,6 +93,8 @@ static struct pmbus_driver_info max16064_info = {
.func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
.func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
.func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
+ .read_word_data = max16064_read_word_data,
+ .write_word_data = max16064_write_word_data,
};
static int max16064_probe(struct i2c_client *client,