linux-kernel - [PATCH] HWMon: LM80: Add "support" for Texas Instruments AMC80

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Date: Wed,  8 May 2024 04:02:44 -0500
From: Andrei Aldea <andrei1998@...il.com>
To: jdelvare@...e.com
Cc: linux@...ck-us.net,
	linux-hwmon@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Andrei Aldea <andrei1998@...il.com>
Subject: [PATCH] HWMon: LM80: Add "support" for Texas Instruments AMC80

Add support for AMC80 which is register compatible with LM96080 and a result of TI's acquisition of National Semiconductor

https://www.ti.com/lit/ds/symlink/amc80.pdf

Signed-off-by: Andrei Aldea <andrei1998@...il.com>
---
 drivers/hwmon/Kconfig | 4 ++--
 drivers/hwmon/lm80.c  | 6 ++++++
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 83945397b6eb..f901ece2ff43 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -1446,11 +1446,11 @@ config SENSORS_LM78
 	  will be called lm78.
 
 config SENSORS_LM80
-	tristate "National Semiconductor LM80 and LM96080"
+	tristate "National Semiconductor LM80, LM96080 and compatibles"
 	depends on I2C
 	help
 	  If you say yes here you get support for National Semiconductor
-	  LM80 and LM96080 sensor chips.
+	  LM80, LM96080 and Texas Instruments AMC80 sensor chips.
 
 	  This driver can also be built as a module. If so, the module
 	  will be called lm80.
diff --git a/drivers/hwmon/lm80.c b/drivers/hwmon/lm80.c
index 63c7831bd3e1..0355b9d849be 100644
--- a/drivers/hwmon/lm80.c
+++ b/drivers/hwmon/lm80.c
@@ -573,6 +573,11 @@ static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info)
 			return -ENODEV;
 
 		name = "lm96080";
+
+	/* Check for  AMC80 version which is register compatible with lm96080 */
+	} else if (man_id == 0x80 && dev_id == 0x08) {
+		name = "amc80";
+
 	} else {
 		/* Check 6-bit addressing */
 		for (i = 0x2a; i <= 0x3d; i++) {
@@ -624,6 +629,7 @@ static int lm80_probe(struct i2c_client *client)
 static const struct i2c_device_id lm80_id[] = {
 	{ "lm80", 0 },
 	{ "lm96080", 1 },
+	{ "amc80", 2},
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, lm80_id);
-- 
2.39.3 (Apple Git-146)