From 92a11405f7ea5ddfc95e1ceefa0e61b7b2d7a489 Mon Sep 17 00:00:00 2001
From: Ioan Dragomir <ioan.dragomir@analog.com>
Date: Tue, 17 Dec 2024 14:52:29 +0200
Subject: [PATCH] drivers: can: Add CAN support for max32662

Adapt MAX32690 driver to use Wrap_MXC_CAN_Init to handle differences
in the MSDK API (see analogdevicesinc/msdk#1306) between the
MAX32690 and MAX32662.

can_driver_api.timing_min required phase_seg1 >= 3 and phase_seg2 >= 2
when configuring CAN bit timing. Both microcontrollers covered by this
driver (MAX32662, MAX32690) support values down to 1 for both of these
timing parameters.

Refer to the docs for registers CAN_BUSTIM1, CANn_BUSTIM1.

Add a can0 node to the MAX32662 dtsi.

Signed-off-by: Ioan Dragomir <ioan.dragomir@analog.com>
---
 drivers/can/can_max32.c         | 13 +++++++------
 dts/arm/adi/max32/max32662.dtsi | 10 +++++++++-
 2 files changed, 16 insertions(+), 7 deletions(-)

diff --git a/drivers/can/can_max32.c b/drivers/can/can_max32.c
index c101a03d089..2a1078fc897 100644
--- a/drivers/can/can_max32.c
+++ b/drivers/can/can_max32.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2024 Analog Devices, Inc.
+ * Copyright (c) 2024-2025 Analog Devices, Inc.
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -15,6 +15,7 @@
 #include <zephyr/logging/log.h>
 
 #include <can.h>
+#include <wrap_max32_can.h>
 
 LOG_MODULE_REGISTER(can_max32, CONFIG_CAN_LOG_LEVEL);
 
@@ -639,10 +640,10 @@ static int can_max32_init(const struct device *dev)
 
 	dev_list[dev_cfg->can_id] = dev;
 
-	ret = MXC_CAN_Init(dev_cfg->can_id, MXC_CAN_OBJ_CFG_TXRX, unit_event_callback,
-			   object_event_callback);
+	ret = Wrap_MXC_CAN_Init(dev_cfg->can_id, MXC_CAN_OBJ_CFG_TXRX, unit_event_callback,
+				object_event_callback);
 	if (ret < 0) {
-		LOG_ERR("MXC_CAN_Init() failed:%d", ret);
+		LOG_ERR("Wrap_MXC_CAN_Init() failed:%d", ret);
 		return ret;
 	}
 
@@ -700,8 +701,8 @@ static const struct can_driver_api can_max32_api = {
 	.timing_min = {
 		.sjw = 1,
 		.prop_seg = 0,
-		.phase_seg1 = 3,
-		.phase_seg2 = 2,
+		.phase_seg1 = 1,
+		.phase_seg2 = 1,
 		.prescaler = 1,
 	},
 	.timing_max = {
diff --git a/dts/arm/adi/max32/max32662.dtsi b/dts/arm/adi/max32/max32662.dtsi
index b2d8c6614ad..50c7416f031 100644
--- a/dts/arm/adi/max32/max32662.dtsi
+++ b/dts/arm/adi/max32/max32662.dtsi
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2024 Analog Devices, Inc.
+ * Copyright (c) 2024-2025 Analog Devices, Inc.
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -127,5 +127,13 @@
 			interrupts = <3 0>;
 			status = "disabled";
 		};
+
+		can0: can@40064000 {
+			compatible = "adi,max32-can";
+			reg = <0x40064000 0x1000>;
+			clocks = <&gcr ADI_MAX32_CLOCK_BUS1 11>;
+			interrupts = <107 0>;
+			status = "disabled";
+		};
 	};
 };