From e5c498ccc90c87155d1f6980cac050d48b8a84b4 Mon Sep 17 00:00:00 2001
From: Atif Ofluoglu <mailto:atif.ofluoglu@maximintegrated.com>
Date: Fri, 15 Apr 2022 16:34:29 +0300
Subject: [PATCH] hwmon: (pmbus/max16601) Add MAX16602 support

Adding another MAX16602 chip support to MAX16601 driver
Tested with MAX16602 works as expected.

Signed-off-by: Atif Ofluoglu <atif.ofluoglu@maximintegrated.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
 Documentation/hwmon/max16601.rst |  8 ++++++++
 drivers/hwmon/pmbus/Kconfig      |  4 ++--
 drivers/hwmon/pmbus/max16601.c   | 13 ++++++++-----
 3 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/Documentation/hwmon/max16601.rst b/Documentation/hwmon/max16601.rst
index 92c0a7d7808c..6a4eef8efbaf 100644
--- a/Documentation/hwmon/max16601.rst
+++ b/Documentation/hwmon/max16601.rst
@@ -21,6 +21,14 @@ Supported chips:
 
     Datasheet: Not published
 
+  * Maxim MAX16602
+
+    Prefix: 'max16602'
+
+    Addresses scanned: -
+
+    Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX16602.pdf
+
 Author: Guenter Roeck <linux@roeck-us.net>
 
 
diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
index a2ea1d5a8765..53683d2d0fb2 100644
--- a/drivers/hwmon/pmbus/Kconfig
+++ b/drivers/hwmon/pmbus/Kconfig
@@ -228,10 +228,10 @@ config SENSORS_MAX16064
 	  be called max16064.
 
 config SENSORS_MAX16601
-	tristate "Maxim MAX16508, MAX16601"
+	tristate "Maxim MAX16508, MAX16601, MAX16602"
 	help
 	  If you say yes here you get hardware monitoring support for Maxim
-	  MAX16508 and MAX16601.
+	  MAX16508, MAX16601 and MAX16602.
 
 	  This driver can also be built as a module. If so, the module will
 	  be called max16601.
diff --git a/drivers/hwmon/pmbus/max16601.c b/drivers/hwmon/pmbus/max16601.c
index 5a226a564776..b628405e6586 100644
--- a/drivers/hwmon/pmbus/max16601.c
+++ b/drivers/hwmon/pmbus/max16601.c
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Hardware monitoring driver for Maxim MAX16508 and MAX16601.
+ * Hardware monitoring driver for Maxim MAX16508, MAX16601 and MAX16602.
  *
  * Implementation notes:
  *
@@ -31,7 +31,7 @@
 
 #include "pmbus.h"
 
-enum chips { max16508, max16601 };
+enum chips { max16508, max16601, max16602 };
 
 #define REG_DEFAULT_NUM_POP	0xc4
 #define REG_SETPT_DVID		0xd1
@@ -202,7 +202,7 @@ static int max16601_identify(struct i2c_client *client,
 	else
 		info->vrm_version[0] = vr12;
 
-	if (data->id != max16601)
+	if (data->id != max16601 && data->id != max16602)
 		return 0;
 
 	reg = i2c_smbus_read_byte_data(client, REG_DEFAULT_NUM_POP);
@@ -264,6 +264,7 @@ static void max16601_remove(void *_data)
 static const struct i2c_device_id max16601_id[] = {
 	{"max16508", max16508},
 	{"max16601", max16601},
+	{"max16602", max16602},
 	{}
 };
 MODULE_DEVICE_TABLE(i2c, max16601_id);
@@ -280,13 +281,15 @@ static int max16601_get_id(struct i2c_client *client)
 		return -ENODEV;
 
 	/*
-	 * PMBUS_IC_DEVICE_ID is expected to return "MAX16601y.xx"
-	 * or "MAX16500y.xx".
+	 * PMBUS_IC_DEVICE_ID is expected to return "MAX16601y.xx" or
+	 * MAX16602y.xx or "MAX16500y.xx".cdxxcccccccccc
 	 */
 	if (!strncmp(buf, "MAX16500", 8)) {
 		id = max16508;
 	} else if (!strncmp(buf, "MAX16601", 8)) {
 		id = max16601;
+	} else if (!strncmp(buf, "MAX16602", 8)) {
+		id = max16602;
 	} else {
 		buf[ret] = '\0';
 		dev_err(dev, "Unsupported chip '%s'\n", buf);