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Add control via KConfig of CAN_CONFIG.SWAP_ENDIAN bit for Microchip Polarfire CAN driver #96938

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Add control via KConfig of CAN_CONFIG.SWAP_ENDIAN bit for Microchip Polarfire CAN driver #96938

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a12ace0
drivers: can: mchp_mss: New
sebhub Sep 2, 2025
df636d3
drivers: can: mchp_mss: add control via KConfig of CAN_CONFIG.SWAP_EN…
DonBrus Oct 2, 2025
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1 change: 1 addition & 0 deletions drivers/can/CMakeLists.txt
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Expand Up @@ -19,6 +19,7 @@ zephyr_library_sources_ifdef(CONFIG_CAN_KVASER_PCI can_kvaser_pci.c)
zephyr_library_sources_ifdef(CONFIG_CAN_LOOPBACK can_loopback.c)
zephyr_library_sources_ifdef(CONFIG_CAN_MAX32 can_max32.c)
zephyr_library_sources_ifdef(CONFIG_CAN_MCAN can_mcan.c)
zephyr_library_sources_ifdef(CONFIG_CAN_MCHP_MSS can_mchp_mss.c)
zephyr_library_sources_ifdef(CONFIG_CAN_MCP2515 can_mcp2515.c)
zephyr_library_sources_ifdef(CONFIG_CAN_MCP251XFD can_mcp251xfd.c)
zephyr_library_sources_ifdef(CONFIG_CAN_MCUX_FLEXCAN can_mcux_flexcan.c)
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1 change: 1 addition & 0 deletions drivers/can/Kconfig
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Expand Up @@ -124,6 +124,7 @@ source "drivers/can/Kconfig.stm32"
source "drivers/can/Kconfig.mcux"
source "drivers/can/Kconfig.mcp2515"
source "drivers/can/Kconfig.mcan"
source "drivers/can/Kconfig.mchp_mss"
source "drivers/can/Kconfig.rcar"
source "drivers/can/Kconfig.numaker"
source "drivers/can/Kconfig.loopback"
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24 changes: 24 additions & 0 deletions drivers/can/Kconfig.mchp_mss
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@@ -0,0 +1,24 @@
# Copyright (C) 2025 embedded brains GmbH & Co. KG
# SPDX-License-Identifier: Apache-2.0

config CAN_MCHP_MSS
bool "Microchip PolarFire SoC CAN driver"
depends on DT_HAS_MICROCHIP_MPFS_CAN_ENABLED
help
This option enables the CAN driver for Microchip's PolarFire SoC
platform.

if CAN_MCHP_MSS

config CAN_MCHP_MSS_SWAP_ENDIANNESS
bool "Force little endian on transmit and receive buffers"
help
This option sets the SWAP_ENDIAN bit of CAN_CONFIG register.
By setting this bit, the values of [TX|RX]_MSGx_DATA_[LOW|HIGH]

Check failure on line 17 in drivers/can/Kconfig.mchp_mss

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TRAILING_WHITESPACE 

drivers/can/Kconfig.mchp_mss:17  trailing whitespace
will operate in little endian mode. For example, either field set

Check failure on line 18 in drivers/can/Kconfig.mchp_mss

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GitHub Actions / Run compliance checks on patch series (PR)

TRAILING_WHITESPACE 

drivers/can/Kconfig.mchp_mss:18  trailing whitespace
to 0x01020304 will result in 0x01 -> 0x02 -> 0x03 -> 0x04 being written on the bus.

Conversely, when operating in the (default) big endian mode, the inverse
sequence will be transmitted on the bus, i.e. in network order.

endif # CAN_MCHP_MSS
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