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authorGuenter Roeck <linux@roeck-us.net>2015-07-20 09:47:33 -0700
committerGuenter Roeck <linux@roeck-us.net>2015-08-09 13:44:27 -0700
commit068c227056b9223fea1a759e08db2558d5cbb5ad (patch)
tree2b95f3e702580b1797554ebfba6123ee52a5f141 /drivers/hwmon
parentead8080351c988b9c4bb5ec261d7b4c97ebb2773 (diff)
hwmon: (pmbus) Add support for VR12
Newer chips such as MAX20751 support VR12. Add support for it. Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon')
-rw-r--r--drivers/hwmon/pmbus/pmbus.c1
-rw-r--r--drivers/hwmon/pmbus/pmbus.h2
-rw-r--r--drivers/hwmon/pmbus/pmbus_core.c16
3 files changed, 15 insertions, 4 deletions
diff --git a/drivers/hwmon/pmbus/pmbus.c b/drivers/hwmon/pmbus/pmbus.c
index 554d0249dcde..bbfa35d82e42 100644
--- a/drivers/hwmon/pmbus/pmbus.c
+++ b/drivers/hwmon/pmbus/pmbus.c
@@ -129,6 +129,7 @@ static int pmbus_identify(struct i2c_client *client,
break;
case 1:
info->format[PSC_VOLTAGE_OUT] = vid;
+ info->vrm_version = vr11;
break;
case 2:
info->format[PSC_VOLTAGE_OUT] = direct;
diff --git a/drivers/hwmon/pmbus/pmbus.h b/drivers/hwmon/pmbus/pmbus.h
index 2427f6e7c641..eece5f5e2282 100644
--- a/drivers/hwmon/pmbus/pmbus.h
+++ b/drivers/hwmon/pmbus/pmbus.h
@@ -338,10 +338,12 @@ enum pmbus_sensor_classes {
#define PMBUS_HAVE_STATUS_VMON (1 << 19)
enum pmbus_data_format { linear = 0, direct, vid };
+enum vrm_version { vr11 = 0, vr12 };
struct pmbus_driver_info {
int pages; /* Total number of pages */
enum pmbus_data_format format[PSC_NUM_CLASSES];
+ enum vrm_version vrm_version;
/*
* Support one set of coefficients for each sensor type
* Used for chips providing data in direct mode.
diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c
index 306a1b175557..398198140b81 100644
--- a/drivers/hwmon/pmbus/pmbus_core.c
+++ b/drivers/hwmon/pmbus/pmbus_core.c
@@ -515,16 +515,24 @@ static long pmbus_reg2data_direct(struct pmbus_data *data,
/*
* Convert VID sensor values to milli- or micro-units
* depending on sensor type.
- * We currently only support VR11.
*/
static long pmbus_reg2data_vid(struct pmbus_data *data,
struct pmbus_sensor *sensor)
{
long val = sensor->data;
+ long rv = 0;
- if (val < 0x02 || val > 0xb2)
- return 0;
- return DIV_ROUND_CLOSEST(160000 - (val - 2) * 625, 100);
+ switch (data->info->vrm_version) {
+ case vr11:
+ if (val >= 0x02 && val <= 0xb2)
+ rv = DIV_ROUND_CLOSEST(160000 - (val - 2) * 625, 100);
+ break;
+ case vr12:
+ if (val >= 0x01)
+ rv = 250 + (val - 1) * 5;
+ break;
+ }
+ return rv;
}
static long pmbus_reg2data(struct pmbus_data *data, struct pmbus_sensor *sensor)