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Subject[PATCH v6 4/7] can: Kconfig: add CONFIG_CAN_RX_OFFLOAD
Date
Only a few drivers rely on the CAN rx offload framework (as of the
writing of this patch, only four: flexcan, m_can, mcp251xfd and
ti_hecc). Split it out of can-dev and add a new config symbol:
CAN_RX_OFFLOAD.

The drivers relying on CAN rx offload are in different sub
folders. Make CAN_RX_OFFLOAD an hidden option and tag all the drivers
depending on that feature with "select CAN_RX_OFFLOAD" so that the
option gets automatically enabled if and only if one of those drivers
is chosen.

Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Suggested-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
---
drivers/net/can/Kconfig | 5 +++++
drivers/net/can/dev/Makefile | 2 +-
drivers/net/can/m_can/Kconfig | 1 +
drivers/net/can/spi/mcp251xfd/Kconfig | 1 +
4 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/net/can/Kconfig b/drivers/net/can/Kconfig
index 87470feae6b1..5335f3afc0a5 100644
--- a/drivers/net/can/Kconfig
+++ b/drivers/net/can/Kconfig
@@ -102,6 +102,9 @@ config CAN_CALC_BITTIMING

If unsure, say Y.

+config CAN_RX_OFFLOAD
+ bool
+
config CAN_AT91
tristate "Atmel AT91 onchip CAN controller"
depends on (ARCH_AT91 || COMPILE_TEST) && HAS_IOMEM
@@ -113,6 +116,7 @@ config CAN_FLEXCAN
tristate "Support for Freescale FLEXCAN based chips"
depends on OF || COLDFIRE || COMPILE_TEST
depends on HAS_IOMEM
+ select CAN_RX_OFFLOAD
help
Say Y here if you want to support for Freescale FlexCAN.

@@ -162,6 +166,7 @@ config CAN_SUN4I
config CAN_TI_HECC
depends on ARM
tristate "TI High End CAN Controller"
+ select CAN_RX_OFFLOAD
help
Driver for TI HECC (High End CAN Controller) module found on many
TI devices. The device specifications are available from www.ti.com
diff --git a/drivers/net/can/dev/Makefile b/drivers/net/can/dev/Makefile
index 791e6b297ea3..633687d6b6c0 100644
--- a/drivers/net/can/dev/Makefile
+++ b/drivers/net/can/dev/Makefile
@@ -9,4 +9,4 @@ can-dev-$(CONFIG_CAN_NETLINK) += bittiming.o
can-dev-$(CONFIG_CAN_NETLINK) += dev.o
can-dev-$(CONFIG_CAN_NETLINK) += length.o
can-dev-$(CONFIG_CAN_NETLINK) += netlink.o
-can-dev-$(CONFIG_CAN_NETLINK) += rx-offload.o
+can-dev-$(CONFIG_CAN_RX_OFFLOAD) += rx-offload.o
diff --git a/drivers/net/can/m_can/Kconfig b/drivers/net/can/m_can/Kconfig
index 45ad1b3f0cd0..fc2afab36279 100644
--- a/drivers/net/can/m_can/Kconfig
+++ b/drivers/net/can/m_can/Kconfig
@@ -1,6 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
menuconfig CAN_M_CAN
tristate "Bosch M_CAN support"
+ select CAN_RX_OFFLOAD
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.
diff --git a/drivers/net/can/spi/mcp251xfd/Kconfig b/drivers/net/can/spi/mcp251xfd/Kconfig
index dd0fc0a54be1..877e4356010d 100644
--- a/drivers/net/can/spi/mcp251xfd/Kconfig
+++ b/drivers/net/can/spi/mcp251xfd/Kconfig
@@ -2,6 +2,7 @@

config CAN_MCP251XFD
tristate "Microchip MCP251xFD SPI CAN controllers"
+ select CAN_RX_OFFLOAD
select REGMAP
select WANT_DEV_COREDUMP
help
--
2.35.1
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