can: m_can: Create a m_can platform framework

Create a m_can platform framework that peripheral
devices can register to and use common code and register sets.
The peripheral devices may provide read/write and configuration
support of the IP.

Acked-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: Dan Murphy <dmurphy@ti.com>
Acked-by: Faiz Abbas <faiz_abbas@ti.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

drivers/net/can/m_can/Kconfig

@@ -1,6 +1,15 @@
 # SPDX-License-Identifier: GPL-2.0-only
 config CAN_M_CAN
+	tristate "Bosch M_CAN support"
+	---help---
+	  Say Y here if you want support for Bosch M_CAN controller framework.
+	  This is common support for devices that embed the Bosch M_CAN IP.
+
+config CAN_M_CAN_PLATFORM
+	tristate "Bosch M_CAN support for io-mapped devices"
 	depends on HAS_IOMEM
-	tristate "Bosch M_CAN devices"
+	depends on CAN_M_CAN
 	---help---
-	  Say Y here if you want to support for Bosch M_CAN controller.
+	  Say Y here if you want support for IO Mapped Bosch M_CAN controller.
+	  This support is for devices that have the Bosch M_CAN controller
+	  IP embedded into the device and the IP is IO Mapped to the processor.

drivers/net/can/m_can/Makefile

@@ -4,3 +4,4 @@
 #
 
 obj-$(CONFIG_CAN_M_CAN) += m_can.o
+obj-$(CONFIG_CAN_M_CAN_PLATFORM) += m_can_platform.o