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path: root/drivers/hwmon/pmbus/mp2975.c
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Diffstat (limited to 'drivers/hwmon/pmbus/mp2975.c')
-rw-r--r--drivers/hwmon/pmbus/mp2975.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/hwmon/pmbus/mp2975.c b/drivers/hwmon/pmbus/mp2975.c
index b9bb469e2d..e5fa10b3b8 100644
--- a/drivers/hwmon/pmbus/mp2975.c
+++ b/drivers/hwmon/pmbus/mp2975.c
@@ -126,6 +126,21 @@ static const struct regulator_desc __maybe_unused mp2975_reg_desc[] = {
#define to_mp2975_data(x) container_of(x, struct mp2975_data, info)
+static int mp2975_read_byte_data(struct i2c_client *client, int page, int reg)
+{
+ switch (reg) {
+ case PMBUS_VOUT_MODE:
+ /*
+ * Report direct format as configured by MFR_DC_LOOP_CTRL.
+ * Unlike on MP2971/MP2973 the reported VOUT_MODE isn't automatically
+ * internally updated, but always reads as PB_VOUT_MODE_VID.
+ */
+ return PB_VOUT_MODE_DIRECT;
+ default:
+ return -ENODATA;
+ }
+}
+
static int
mp2975_read_word_helper(struct i2c_client *client, int page, int phase, u8 reg,
u16 mask)
@@ -869,6 +884,7 @@ static struct pmbus_driver_info mp2975_info = {
PMBUS_HAVE_IIN | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP | PMBUS_HAVE_POUT |
PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT | PMBUS_PHASE_VIRTUAL,
+ .read_byte_data = mp2975_read_byte_data,
.read_word_data = mp2975_read_word_data,
#if IS_ENABLED(CONFIG_SENSORS_MP2975_REGULATOR)
.num_regulators = 1,