hwmon: (adm1275) Add support for ADM1075

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

2 files changed, 86 insertions, 6 deletions

diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
index 1f0d0110b6b8..9246d0154f74 100644
--- a/drivers/hwmon/pmbus/Kconfig
+++ b/drivers/hwmon/pmbus/Kconfig
@@ -31,8 +31,8 @@ config SENSORS_ADM1275
         default n
         help
           If you say yes here you get hardware monitoring support for Analog
-          Devices ADM1275 and ADM1276 Hot-Swap Controller and Digital Power
-          Monitor.
+          Devices ADM1075, ADM1275, and ADM1276 Hot-Swap Controller and Digital
+          Power Monitors.
 
           This driver can also be built as a module. If so, the module will
           be called adm1275.
diff --git a/drivers/hwmon/pmbus/adm1275.c b/drivers/hwmon/pmbus/adm1275.c
index 5e4421e57eb0..60aad9570f01 100644
--- a/drivers/hwmon/pmbus/adm1275.c
+++ b/drivers/hwmon/pmbus/adm1275.c
@@ -23,7 +23,7 @@
 #include <linux/i2c.h>
 #include "pmbus.h"
 
-enum chips { adm1275, adm1276 };
+enum chips { adm1075, adm1275, adm1276 };
 
 #define ADM1275_PEAK_IOUT               0xd0
 #define ADM1275_PEAK_VIN                0xd1
@@ -32,6 +32,9 @@ enum chips { adm1275, adm1276 };
 
 #define ADM1275_VIN_VOUT_SELECT         (1 << 6)
 #define ADM1275_VRANGE                  (1 << 5)
+#define ADM1075_IRANGE_50               (1 << 4)
+#define ADM1075_IRANGE_25               (1 << 3)
+#define ADM1075_IRANGE_MASK             ((1 << 3) | (1 << 4))
 
 #define ADM1275_IOUT_WARN2_LIMIT        0xd7
 #define ADM1275_DEVICE_CONFIG           0xd8
@@ -42,6 +45,14 @@ enum chips { adm1275, adm1276 };
 
 #define ADM1275_MFR_STATUS_IOUT_WARN2   (1 << 0)
 
+#define ADM1075_READ_VAUX               0xdd
+#define ADM1075_VAUX_OV_WARN_LIMIT      0xde
+#define ADM1075_VAUX_UV_WARN_LIMIT      0xdf
+#define ADM1075_VAUX_STATUS             0xf6
+
+#define ADM1075_VAUX_OV_WARN            (1<<7)
+#define ADM1075_VAUX_UV_WARN            (1<<6)
+
 struct adm1275_data {
         int id;
         bool have_oc_fault;
@@ -74,6 +85,29 @@ static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
                 }
                 ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT);
                 break;
+        case PMBUS_VOUT_OV_WARN_LIMIT:
+                if (data->id != adm1075) {
+                        ret = -ENODATA;
+                        break;
+                }
+                ret = pmbus_read_word_data(client, 0,
+                                           ADM1075_VAUX_OV_WARN_LIMIT);
+                break;
+        case PMBUS_VOUT_UV_WARN_LIMIT:
+                if (data->id != adm1075) {
+                        ret = -ENODATA;
+                        break;
+                }
+                ret = pmbus_read_word_data(client, 0,
+                                           ADM1075_VAUX_UV_WARN_LIMIT);
+                break;
+        case PMBUS_READ_VOUT:
+                if (data->id != adm1075) {
+                        ret = -ENODATA;
+                        break;
+                }
+                ret = pmbus_read_word_data(client, 0, ADM1075_READ_VAUX);
+                break;
         case PMBUS_VIRT_READ_IOUT_MAX:
                 ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_IOUT);
                 break;
@@ -84,7 +118,7 @@ static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
                 ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VIN);
                 break;
         case PMBUS_VIRT_READ_PIN_MAX:
-                if (data->id != adm1276) {
+                if (data->id == adm1275) {
                         ret = -ENXIO;
                         break;
                 }
@@ -95,7 +129,7 @@ static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
         case PMBUS_VIRT_RESET_VIN_HISTORY:
                 break;
         case PMBUS_VIRT_RESET_PIN_HISTORY:
-                if (data->id != adm1276)
+                if (data->id == adm1275)
                         ret = -ENXIO;
                 break;
         default:
@@ -163,6 +197,19 @@ static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg)
                           PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT;
                 }
                 break;
+        case PMBUS_STATUS_VOUT:
+                if (data->id != adm1075) {
+                        ret = -ENODATA;
+                        break;
+                }
+                ret = 0;
+                mfr_status = pmbus_read_byte_data(client, 0,
+                                                  ADM1075_VAUX_STATUS);
+                if (mfr_status & ADM1075_VAUX_OV_WARN)
+                        ret |= PB_VOLTAGE_OV_WARNING;
+                if (mfr_status & ADM1075_VAUX_UV_WARN)
+                        ret |= PB_VOLTAGE_UV_WARNING;
+                break;
         default:
                 ret = -ENODATA;
                 break;
@@ -171,6 +218,7 @@ static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg)
 }
 
 static const struct i2c_device_id adm1275_id[] = {
+        { "adm1075", adm1075 },
         { "adm1275", adm1275 },
         { "adm1276", adm1276 },
         { }
@@ -251,7 +299,14 @@ static int adm1275_probe(struct i2c_client *client,
         info->read_byte_data = adm1275_read_byte_data;
         info->write_word_data = adm1275_write_word_data;
 
-        if (config & ADM1275_VRANGE) {
+        if (data->id == adm1075) {
+                info->m[PSC_VOLTAGE_IN] = 27169;
+                info->b[PSC_VOLTAGE_IN] = 0;
+                info->R[PSC_VOLTAGE_IN] = -1;
+                info->m[PSC_VOLTAGE_OUT] = 27169;
+                info->b[PSC_VOLTAGE_OUT] = 0;
+                info->R[PSC_VOLTAGE_OUT] = -1;
+        } else if (config & ADM1275_VRANGE) {
                 info->m[PSC_VOLTAGE_IN] = 19199;
                 info->b[PSC_VOLTAGE_IN] = 0;
                 info->R[PSC_VOLTAGE_IN] = -2;
@@ -271,6 +326,31 @@ static int adm1275_probe(struct i2c_client *client,
                 data->have_oc_fault = true;
 
         switch (data->id) {
+        case adm1075:
+                info->format[PSC_POWER] = direct;
+                info->b[PSC_POWER] = 0;
+                info->R[PSC_POWER] = -1;
+                switch (config & ADM1075_IRANGE_MASK) {
+                case ADM1075_IRANGE_25:
+                        info->m[PSC_POWER] = 8549;
+                        info->m[PSC_CURRENT_OUT] = 806;
+                        break;
+                case ADM1075_IRANGE_50:
+                        info->m[PSC_POWER] = 4279;
+                        info->m[PSC_CURRENT_OUT] = 404;
+                        break;
+                default:
+                        dev_err(&client->dev, "Invalid input current range");
+                        info->m[PSC_POWER] = 0;
+                        info->m[PSC_CURRENT_OUT] = 0;
+                        break;
+                }
+                info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
+                  | PMBUS_HAVE_STATUS_INPUT;
+                if (config & ADM1275_VIN_VOUT_SELECT)
+                        info->func[0] |=
+                          PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
+                break;
         case adm1275:
                 if (config & ADM1275_VIN_VOUT_SELECT)
                         info->func[0] |=