[PATCH 0/3] can: rockchip: add RK3588 CAN-FD support

[1579567540 at qq.com]

From: luch00 <1579567540 at qq.com>

Add initial support for the RK3588v2 CAN-FD controller.

RK3588 integrates three CAN-FD controllers that are closely related to
the existing Rockchip CAN-FD IP already supported in the kernel, but
they cannot reuse the rk3568v2 description unchanged.

This series therefore:

- extends the existing Rockchip CAN-FD binding with the
  rockchip,rk3588v2-canfd compatible
- adds a dedicated RK3588v2 match entry and devtype in the driver
- describes the three CAN-FD controller nodes in rk3588-base.dtsi

The dedicated driver data is needed because RK3588v2 encodes
RX_FIFO_CNT in bits 7:5 instead of 6:4. Runtime validation on RK3588v2
also showed that its observed errata profile differs from rk3568v2 and
rk3568v3, so using a fallback compatible would be misleading.

Tested on an embedfire,rk3588-lubancat-5io board with can0/can1
directly connected. Runtime testing used a 198 MHz CAN clock, nominal
bitrate 500 kbit/s, data bitrate 1 Mbit/s, and included stress and
error-path coverage for the existing Rockchip errata handling.

luch00 (3):
  dt-bindings: can: rockchip: add rk3588v2 CAN-FD compatible
  can: rockchip: add RK3588 CAN-FD support
  arm64: dts: rockchip: add CAN-FD nodes for RK3588

 .../net/can/rockchip,rk3568v2-canfd.yaml      |  1 +
 arch/arm64/boot/dts/rockchip/rk3588-base.dtsi | 39 +++++++++++++++++++
 .../net/can/rockchip/rockchip_canfd-core.c    | 14 +++++++
 drivers/net/can/rockchip/rockchip_canfd-rx.c  |  5 ++-
 drivers/net/can/rockchip/rockchip_canfd.h     | 12 +++++-
 5 files changed, 69 insertions(+), 2 deletions(-)

-- 
2.34.1