hwmon: (pmbus/lm25066) Add support for LM25063

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

1 files changed, 82 insertions, 9 deletions

diff --git a/drivers/hwmon/pmbus/lm25066.c b/drivers/hwmon/pmbus/lm25066.c
index 6a9d6edaacb3..a26b1d1d9514 100644
--- a/drivers/hwmon/pmbus/lm25066.c
+++ b/drivers/hwmon/pmbus/lm25066.c
@@ -1,5 +1,5 @@
 /*
- * Hardware monitoring driver for LM25056 / LM25066 / LM5064 / LM5066
+ * Hardware monitoring driver for LM25056 / LM25063 / LM25066 / LM5064 / LM5066
  *
  * Copyright (c) 2011 Ericsson AB.
  * Copyright (c) 2013 Guenter Roeck
@@ -27,7 +27,7 @@
 #include <linux/i2c.h>
 #include "pmbus.h"
 
-enum chips { lm25056, lm25066, lm5064, lm5066 };
+enum chips { lm25056, lm25063, lm25066, lm5064, lm5066 };
 
 #define LM25066_READ_VAUX               0xd0
 #define LM25066_MFR_READ_IIN            0xd1
@@ -52,6 +52,11 @@ enum chips { lm25056, lm25066, lm5064, lm5066 };
 #define LM25056_MFR_STS_VAUX_OV_WARN    (1 << 1)
 #define LM25056_MFR_STS_VAUX_UV_WARN    (1 << 0)
 
+/* LM25063 only */
+
+#define LM25063_READ_VOUT_MAX           0xe5
+#define LM25063_READ_VOUT_MIN           0xe6
+
 struct __coeff {
         short m, b, R;
 };
@@ -59,7 +64,7 @@ struct __coeff {
 #define PSC_CURRENT_IN_L        (PSC_NUM_CLASSES)
 #define PSC_POWER_L             (PSC_NUM_CLASSES + 1)
 
-static struct __coeff lm25066_coeff[4][PSC_NUM_CLASSES + 2] = {
+static struct __coeff lm25066_coeff[5][PSC_NUM_CLASSES + 2] = {
         [lm25056] = {
                 [PSC_VOLTAGE_IN] = {
                         .m = 16296,
@@ -116,6 +121,36 @@ static struct __coeff lm25066_coeff[4][PSC_NUM_CLASSES + 2] = {
                         .m = 16,
                 },
         },
+        [lm25063] = {
+                [PSC_VOLTAGE_IN] = {
+                        .m = 16000,
+                        .R = -2,
+                },
+                [PSC_VOLTAGE_OUT] = {
+                        .m = 16000,
+                        .R = -2,
+                },
+                [PSC_CURRENT_IN] = {
+                        .m = 10000,
+                        .R = -2,
+                },
+                [PSC_CURRENT_IN_L] = {
+                        .m = 10000,
+                        .R = -2,
+                },
+                [PSC_POWER] = {
+                        .m = 5000,
+                        .R = -3,
+                },
+                [PSC_POWER_L] = {
+                        .m = 5000,
+                        .R = -3,
+                },
+                [PSC_TEMPERATURE] = {
+                        .m = 15596,
+                        .R = -3,
+                },
+        },
         [lm5064] = {
                 [PSC_VOLTAGE_IN] = {
                         .m = 4611,
@@ -178,6 +213,7 @@ static struct __coeff lm25066_coeff[4][PSC_NUM_CLASSES + 2] = {
 
 struct lm25066_data {
         int id;
+        u16 rlimit;                     /* Maximum register value */
         struct pmbus_driver_info info;
 };
 
@@ -200,6 +236,10 @@ static int lm25066_read_word_data(struct i2c_client *client, int page, int reg)
                         /* VIN: 6.14 mV VAUX: 293 uV LSB */
                         ret = DIV_ROUND_CLOSEST(ret * 293, 6140);
                         break;
+                case lm25063:
+                        /* VIN: 6.25 mV VAUX: 200.0 uV LSB */
+                        ret = DIV_ROUND_CLOSEST(ret * 20, 625);
+                        break;
                 case lm25066:
                         /* VIN: 4.54 mV VAUX: 283.2 uV LSB */
                         ret = DIV_ROUND_CLOSEST(ret * 2832, 45400);
@@ -253,6 +293,24 @@ static int lm25066_read_word_data(struct i2c_client *client, int page, int reg)
         return ret;
 }
 
+static int lm25063_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, 0, LM25063_READ_VOUT_MAX);
+                break;
+        case PMBUS_VIRT_READ_VOUT_MIN:
+                ret = pmbus_read_word_data(client, 0, LM25063_READ_VOUT_MIN);
+                break;
+        default:
+                ret = lm25066_read_word_data(client, page, reg);
+                break;
+        }
+        return ret;
+}
+
 static int lm25056_read_word_data(struct i2c_client *client, int page, int reg)
 {
         int ret;
@@ -308,27 +366,34 @@ static int lm25056_read_byte_data(struct i2c_client *client, int page, int reg)
 static int lm25066_write_word_data(struct i2c_client *client, int page, int reg,
                                    u16 word)
 {
+        const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
+        const struct lm25066_data *data = to_lm25066_data(info);
         int ret;
 
         switch (reg) {
+        case PMBUS_POUT_OP_FAULT_LIMIT:
+        case PMBUS_POUT_OP_WARN_LIMIT:
         case PMBUS_VOUT_UV_WARN_LIMIT:
         case PMBUS_OT_FAULT_LIMIT:
         case PMBUS_OT_WARN_LIMIT:
+        case PMBUS_IIN_OC_FAULT_LIMIT:
         case PMBUS_VIN_UV_WARN_LIMIT:
+        case PMBUS_VIN_UV_FAULT_LIMIT:
+        case PMBUS_VIN_OV_FAULT_LIMIT:
         case PMBUS_VIN_OV_WARN_LIMIT:
-                word = ((s16)word < 0) ? 0 : clamp_val(word, 0, 0x0fff);
+                word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit);
                 ret = pmbus_write_word_data(client, 0, reg, word);
                 pmbus_clear_cache(client);
                 break;
         case PMBUS_IIN_OC_WARN_LIMIT:
-                word = ((s16)word < 0) ? 0 : clamp_val(word, 0, 0x0fff);
+                word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit);
                 ret = pmbus_write_word_data(client, 0,
                                             LM25066_MFR_IIN_OC_WARN_LIMIT,
                                             word);
                 pmbus_clear_cache(client);
                 break;
         case PMBUS_PIN_OP_WARN_LIMIT:
-                word = ((s16)word < 0) ? 0 : clamp_val(word, 0, 0x0fff);
+                word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit);
                 ret = pmbus_write_word_data(client, 0,
                                             LM25066_MFR_PIN_OP_WARN_LIMIT,
                                             word);
@@ -337,7 +402,7 @@ static int lm25066_write_word_data(struct i2c_client *client, int page, int reg,
         case PMBUS_VIRT_VMON_UV_WARN_LIMIT:
                 /* Adjust from VIN coefficients (for LM25056) */
                 word = DIV_ROUND_CLOSEST((int)word * 6140, 293);
-                word = ((s16)word < 0) ? 0 : clamp_val(word, 0, 0x0fff);
+                word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit);
                 ret = pmbus_write_word_data(client, 0,
                                             LM25056_VAUX_UV_WARN_LIMIT, word);
                 pmbus_clear_cache(client);
@@ -345,7 +410,7 @@ static int lm25066_write_word_data(struct i2c_client *client, int page, int reg,
         case PMBUS_VIRT_VMON_OV_WARN_LIMIT:
                 /* Adjust from VIN coefficients (for LM25056) */
                 word = DIV_ROUND_CLOSEST((int)word * 6140, 293);
-                word = ((s16)word < 0) ? 0 : clamp_val(word, 0, 0x0fff);
+                word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit);
                 ret = pmbus_write_word_data(client, 0,
                                             LM25056_VAUX_OV_WARN_LIMIT, word);
                 pmbus_clear_cache(client);
@@ -399,9 +464,16 @@ static int lm25066_probe(struct i2c_client *client,
                 info->func[0] |= PMBUS_HAVE_STATUS_VMON;
                 info->read_word_data = lm25056_read_word_data;
                 info->read_byte_data = lm25056_read_byte_data;
+                data->rlimit = 0x0fff;
+        } else if (data->id == lm25063) {
+                info->func[0] |= PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
+                  | PMBUS_HAVE_POUT;
+                info->read_word_data = lm25063_read_word_data;
+                data->rlimit = 0xffff;
         } else {
                 info->func[0] |= PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
                 info->read_word_data = lm25066_read_word_data;
+                data->rlimit = 0x0fff;
         }
         info->write_word_data = lm25066_write_word_data;
 
@@ -432,6 +504,7 @@ static int lm25066_probe(struct i2c_client *client,
 
 static const struct i2c_device_id lm25066_id[] = {
         {"lm25056", lm25056},
+        {"lm25063", lm25063},
         {"lm25066", lm25066},
         {"lm5064", lm5064},
         {"lm5066", lm5066},
@@ -453,5 +526,5 @@ static struct i2c_driver lm25066_driver = {
 module_i2c_driver(lm25066_driver);
 
 MODULE_AUTHOR("Guenter Roeck");
-MODULE_DESCRIPTION("PMBus driver for LM25056/LM25066/LM5064/LM5066");
+MODULE_DESCRIPTION("PMBus driver for LM25066 and compatible chips");
 MODULE_LICENSE("GPL");