linux-kernel - [PATCH v1 1/1] rtc: nuvoton: Modify part number value

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Date: Mon, 11 Mar 2024 09:34:05 +0800
From: Mia Lin <mimi05633@...il.com>
To: avifishman70@...il.com,
	tmaimon77@...il.com,
	tali.perry1@...il.com,
	venture@...gle.com,
	yuenn@...gle.com,
	benjaminfair@...gle.com,
	alexandre.belloni@...tlin.com,
	mimi05633@...il.com,
	KWLIU@...oton.com,
	mylin1@...oton.com
Cc: openbmc@...ts.ozlabs.org,
	linux-rtc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v1 1/1] rtc: nuvoton: Modify part number value

Base on datasheet,
    the part number is corresponding to bit 0 and 1 of the part info reg.

Signed-off-by: Mia Lin <mimi05633@...il.com>
---
 drivers/rtc/rtc-nct3018y.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/drivers/rtc/rtc-nct3018y.c b/drivers/rtc/rtc-nct3018y.c
index f488a189a465..9dce003126a5 100644
--- a/drivers/rtc/rtc-nct3018y.c
+++ b/drivers/rtc/rtc-nct3018y.c
@@ -517,12 +517,15 @@ static int nct3018y_probe(struct i2c_client *client)
 	if (nct3018y->part_num < 0) {
 		dev_dbg(&client->dev, "Failed to read NCT3018Y_REG_PART.\n");
 		return nct3018y->part_num;
-	} else if (nct3018y->part_num == NCT3018Y_REG_PART_NCT3018Y) {
-		flags = NCT3018Y_BIT_HF;
-		err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_CTRL, flags);
-		if (err < 0) {
-			dev_dbg(&client->dev, "Unable to write NCT3018Y_REG_CTRL.\n");
-			return err;
+	} else {
+		nct3018y->part_num &= 0x03; /* Part number is corresponding to bit 0 and 1 */
+		if (nct3018y->part_num == NCT3018Y_REG_PART_NCT3018Y) {
+			flags = NCT3018Y_BIT_HF;
+			err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_CTRL, flags);
+			if (err < 0) {
+				dev_dbg(&client->dev, "Unable to write NCT3018Y_REG_CTRL.\n");
+				return err;
+			}
 		}
 	}
 
-- 
2.25.1