can: rcar: drop unneeded ARM dependency

The dependency on ARM predates the dependency on ARCH_RENESAS. The
latter was introduced for Renesas arm64 SoCs first, and later extended
to cover Renesas ARM

can: rcar: drop unneeded ARM dependency

The dependency on ARM predates the dependency on ARCH_RENESAS. The
latter was introduced for Renesas arm64 SoCs first, and later extended
to cover Renesas ARM SoCs, too.

Link: https://lore.kernel.org/all/362d9ced19f3524ee8917df5681b3880c13cac85.1630416373.git.geert+renesas@glider.be
Signed-off-by: Geert Uytterhoeven <[email protected]>
Signed-off-by: Marc Kleine-Budde <[email protected]>

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can: rcar: Kconfig: Add helper dependency on COMPILE_TEST

it's helpful for complie test in other platform(e.g.X86)

Link: https://lore.kernel.org/r/[email protected]
Signed-

can: rcar: Kconfig: Add helper dependency on COMPILE_TEST

it's helpful for complie test in other platform(e.g.X86)

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Cai Huoqing <[email protected]>
Signed-off-by: Marc Kleine-Budde <[email protected]>

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can: rcar: Kconfig: update help description for CAN_RCAR config

The rcar_can driver also supports RZ/G SoC's, update the description to reflect
this.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev

can: rcar: Kconfig: update help description for CAN_RCAR config

The rcar_can driver also supports RZ/G SoC's, update the description to reflect
this.

Signed-off-by: Lad Prabhakar <[email protected]>
Reviewed-by: Geert Uytterhoeven <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>

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treewide: replace '---help---' in Kconfig files with 'help'

Since commit 84af7a6194e4 ("checkpatch: kconfig: prefer 'help' over
'---help---'"), the number of '---help---' has been gradually
decreasi

treewide: replace '---help---' in Kconfig files with 'help'

Since commit 84af7a6194e4 ("checkpatch: kconfig: prefer 'help' over
'---help---'"), the number of '---help---' has been gradually
decreasing, but there are still more than 2400 instances.

This commit finishes the conversion. While I touched the lines,
I also fixed the indentation.

There are a variety of indentation styles found.

a) 4 spaces + '---help---'
b) 7 spaces + '---help---'
c) 8 spaces + '---help---'
d) 1 space + 1 tab + '---help---'
e) 1 tab + '---help---' (correct indentation)
f) 1 tab + 1 space + '---help---'
g) 1 tab + 2 spaces + '---help---'

In order to convert all of them to 1 tab + 'help', I ran the
following commend:

$ find . -name 'Kconfig*' | xargs sed -i 's/^[[:space:]]*---help---/\thelp/'

Signed-off-by: Masahiro Yamada <[email protected]>

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can: rcar: add SPDX identifiers to Kconfig and Makefile

This patch adds SPDX-License-Identifier to Kconfig and Makefile.

Signed-off-by: Kuninori Morimoto <[email protected]>
Reviewed

can: rcar: add SPDX identifiers to Kconfig and Makefile

This patch adds SPDX-License-Identifier to Kconfig and Makefile.

Signed-off-by: Kuninori Morimoto <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
Acked-by: Ramesh Shanmugasundaram <[email protected]>
Signed-off-by: Marc Kleine-Budde <[email protected]>

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can: rcar_can: Move Renesas CAN driver to rcar dir

This patch clubs the Renesas controller drivers in one rcar dir.

Signed-off-by: Ramesh Shanmugasundaram <[email protected]>
S

can: rcar_can: Move Renesas CAN driver to rcar dir

This patch clubs the Renesas controller drivers in one rcar dir.

Signed-off-by: Ramesh Shanmugasundaram <[email protected]>
Signed-off-by: Marc Kleine-Budde <[email protected]>

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can: rcar_canfd: Add Renesas R-Car CAN FD driver

This patch adds support for the CAN FD controller found in Renesas R-Car
SoCs. The controller operates in CAN FD only mode by default.

CAN FD mode s

can: rcar_canfd: Add Renesas R-Car CAN FD driver

This patch adds support for the CAN FD controller found in Renesas R-Car
SoCs. The controller operates in CAN FD only mode by default.

CAN FD mode supports both Classical CAN & CAN FD frame formats. The
controller supports ISO 11898-1:2015 CAN FD format only.

This controller supports two channels and the driver can enable either
or both of the channels.

Driver uses Rx FIFOs (one per channel) for reception & Common FIFOs (one
per channel) for transmission. Rx filter rules are configured to the
minimum (one per channel) and it accepts Standard, Extended, Data &
Remote Frame combinations.

Note: There are few documentation errors in R-Car Gen3 Hardware User
Manual v0.5E with respect to CAN FD controller. They are listed below:

1. CAN FD interrupt numbers 29 & 30 are listed as per channel
interrupts. However, they are common to both channels (i.e.) they are
global and channel interrupts respectively.

2. CANFD clock is derived from PLL1. This is not documented.

3. CANFD clock is further divided by (1/2) within the CAN FD controller.
This is not documented.

4. The minimum value of NTSEG1 in RSCFDnCFDCmNCFG register is 2 Tq. It
is specified 4 Tq in the manual.

5. The maximum number of message RAM area the controller can use is 3584
bytes. It is specified 10752 bytes in the manual.

Signed-off-by: Ramesh Shanmugasundaram <[email protected]>
Acked-by: Rob Herring <[email protected]>
Reviewed-by: Ulrich Hecht <[email protected]>
Signed-off-by: Marc Kleine-Budde <[email protected]>

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