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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/drivers/net/can/m_can/Kconfig
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@@ -1,5 +1,25 @@
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+# SPDX-License-Identifier: GPL-2.0-only
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 config CAN_M_CAN
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+	tristate "Bosch M_CAN support"
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+	help
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+	  Say Y here if you want support for Bosch M_CAN controller framework.
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+	  This is common support for devices that embed the Bosch M_CAN IP.
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+
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+config CAN_M_CAN_PLATFORM
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+	tristate "Bosch M_CAN support for io-mapped devices"
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 	depends on HAS_IOMEM
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-	tristate "Bosch M_CAN devices"
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-	---help---
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-	  Say Y here if you want to support for Bosch M_CAN controller.
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+	depends on CAN_M_CAN
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+	help
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+	  Say Y here if you want support for IO Mapped Bosch M_CAN controller.
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+	  This support is for devices that have the Bosch M_CAN controller
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+	  IP embedded into the device and the IP is IO Mapped to the processor.
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+
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+config CAN_M_CAN_TCAN4X5X
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+	depends on CAN_M_CAN
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+	depends on SPI
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+	select REGMAP_SPI
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+	tristate "TCAN4X5X M_CAN device"
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+	help
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+	  Say Y here if you want support for Texas Instruments TCAN4x5x
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+	  M_CAN controller.  This device is a peripheral device that uses the
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+	  SPI bus for communication.