hwmon: (ltc2978) Introduce feature flags

It is becoming cumbersom to track per-chip feature support.
Introduce feature flag to simplify the code.

Tested-by: Michael Jones <mike@proclivis.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

1 files changed, 18 insertions, 12 deletions

diff --git a/drivers/hwmon/pmbus/ltc2978.c b/drivers/hwmon/pmbus/ltc2978.c
index e153ffd59ab0..48cbb5794e30 100644
--- a/drivers/hwmon/pmbus/ltc2978.c
+++ b/drivers/hwmon/pmbus/ltc2978.c
@@ -97,10 +97,14 @@ struct ltc2978_data {
         u16 pin_min, pin_max;
         u16 temp2_max;
         struct pmbus_driver_info info;
+        u32 features;
 };
-
 #define to_ltc2978_data(x)  container_of(x, struct ltc2978_data, info)
 
+#define FEAT_CLEAR_PEAKS        BIT(0)
+
+#define has_clear_peaks(d)      ((d)->features & FEAT_CLEAR_PEAKS)
+
 static inline int lin11_to_val(int data)
 {
         s16 e = ((s16)data) >> 11;
@@ -374,13 +378,12 @@ static int ltc3883_read_word_data(struct i2c_client *client, int page, int reg)
         return ret;
 }
 
-static int ltc2978_clear_peaks(struct i2c_client *client, int page,
-                               enum chips id)
+static int ltc2978_clear_peaks(struct ltc2978_data *data,
+                               struct i2c_client *client, int page)
 {
         int ret;
 
-        if (id == ltc3880 || id == ltc3882 || id == ltc3883 || id == ltc3887 ||
-            id == ltm4676)
+        if (has_clear_peaks(data))
                 ret = pmbus_write_byte(client, 0, LTC3880_MFR_CLEAR_PEAKS);
         else
                 ret = pmbus_write_byte(client, page, PMBUS_CLEAR_FAULTS);
@@ -399,36 +402,36 @@ static int ltc2978_write_word_data(struct i2c_client *client, int page,
         case PMBUS_VIRT_RESET_IIN_HISTORY:
                 data->iin_max = 0x7c00;
                 data->iin_min = 0x7bff;
-                ret = ltc2978_clear_peaks(client, 0, data->id);
+                ret = ltc2978_clear_peaks(data, client, 0);
                 break;
         case PMBUS_VIRT_RESET_PIN_HISTORY:
                 data->pin_max = 0x7c00;
                 data->pin_min = 0x7bff;
-                ret = ltc2978_clear_peaks(client, 0, data->id);
+                ret = ltc2978_clear_peaks(data, client, 0);
                 break;
         case PMBUS_VIRT_RESET_IOUT_HISTORY:
                 data->iout_max[page] = 0x7c00;
                 data->iout_min[page] = 0xfbff;
-                ret = ltc2978_clear_peaks(client, page, data->id);
+                ret = ltc2978_clear_peaks(data, client, page);
                 break;
         case PMBUS_VIRT_RESET_TEMP2_HISTORY:
                 data->temp2_max = 0x7c00;
-                ret = ltc2978_clear_peaks(client, page, data->id);
+                ret = ltc2978_clear_peaks(data, client, page);
                 break;
         case PMBUS_VIRT_RESET_VOUT_HISTORY:
                 data->vout_min[page] = 0xffff;
                 data->vout_max[page] = 0;
-                ret = ltc2978_clear_peaks(client, page, data->id);
+                ret = ltc2978_clear_peaks(data, client, page);
                 break;
         case PMBUS_VIRT_RESET_VIN_HISTORY:
                 data->vin_min = 0x7bff;
                 data->vin_max = 0x7c00;
-                ret = ltc2978_clear_peaks(client, page, data->id);
+                ret = ltc2978_clear_peaks(data, client, page);
                 break;
         case PMBUS_VIRT_RESET_TEMP_HISTORY:
                 data->temp_min[page] = 0x7bff;
                 data->temp_max[page] = 0x7c00;
-                ret = ltc2978_clear_peaks(client, page, data->id);
+                ret = ltc2978_clear_peaks(data, client, page);
                 break;
         default:
                 ret = -ENODATA;
@@ -603,6 +606,7 @@ static int ltc2978_probe(struct i2c_client *client,
         case ltc3880:
         case ltc3887:
         case ltm4676:
+                data->features |= FEAT_CLEAR_PEAKS;
                 info->read_word_data = ltc3880_read_word_data;
                 info->pages = LTC3880_NUM_PAGES;
                 info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN
@@ -617,6 +621,7 @@ static int ltc2978_probe(struct i2c_client *client,
                   | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
                 break;
         case ltc3882:
+                data->features |= FEAT_CLEAR_PEAKS;
                 info->read_word_data = ltc3880_read_word_data;
                 info->pages = LTC3880_NUM_PAGES;
                 info->func[0] = PMBUS_HAVE_VIN
@@ -631,6 +636,7 @@ static int ltc2978_probe(struct i2c_client *client,
                   | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
                 break;
         case ltc3883:
+                data->features |= FEAT_CLEAR_PEAKS;
                 info->read_word_data = ltc3883_read_word_data;
                 info->pages = LTC3883_NUM_PAGES;
                 info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN