linux-kernel - [PATCH v2] hwmon:(adm1275) Enable adm1278 ADM1278_TEMP1

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Date:   Fri, 29 May 2020 18:16:07 +0530
From:   Manikandan Elumalai <manikandan.hcl.ers.epl@...il.com>
To:     linux-hwmon@...r.kernel.org, linux-aspeed@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org, openbmc@...ts.ozlabs.org
Cc:     linux@...ck-us.net, saipsdasari@...com, patrickw3@...com,
        vijaykhemka@...com, manikandan.e@....com
Subject: [PATCH v2] hwmon:(adm1275) Enable adm1278 ADM1278_TEMP1_EN 

The adm1278 temperature sysfs attribute need it for one of the openbmc platform . 
This functionality is not enabled by default, so PMON_CONFIG needs to be modified in order to enable it.

Signed-off-by   : Manikandan Elumalai <manikandan.hcl.ers.epl@...il.com>

v2:
   - Add Signed-off-by.
   - Removed ADM1278_TEMP1_EN check.
---
 drivers/hwmon/pmbus/adm1275.c | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/drivers/hwmon/pmbus/adm1275.c b/drivers/hwmon/pmbus/adm1275.c
index 5caa37fb..ab5fceb 100644
--- a/drivers/hwmon/pmbus/adm1275.c
+++ b/drivers/hwmon/pmbus/adm1275.c
@@ -666,7 +666,23 @@ static int adm1275_probe(struct i2c_client *client,
 		tindex = 3;
 
 		info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
-			PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
+			PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
+			PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
+
+		config = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
+		if (config < 0)
+			return config;
+
+		/* Enable TEMP1 by default */
+		config |= ADM1278_TEMP1_EN;
+		ret = i2c_smbus_write_byte_data(client,
+					ADM1275_PMON_CONFIG,
+					config);
+		if (ret < 0) {
+		dev_err(&client->dev,
+			"Failed to enable temperature config\n");
+		return -ENODEV;
+		}
 
 		/* Enable VOUT if not enabled (it is disabled by default) */
 		if (!(config & ADM1278_VOUT_EN)) {
@@ -681,9 +697,6 @@ static int adm1275_probe(struct i2c_client *client,
 			}
 		}
 
-		if (config & ADM1278_TEMP1_EN)
-			info->func[0] |=
-				PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
 		if (config & ADM1278_VIN_EN)
 			info->func[0] |= PMBUS_HAVE_VIN;
 		break;
-- 
2.7.4