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Add support for the RK3588 CAN controller by introducing a dedicated model ID and OF match entry. The block is closely related to the existing RK3568 variants, but it cannot reuse their match data unchanged. In particular, RK3588 encodes RX_FIFO_CNT in bits 7:5 instead of 6:4, so the RX path needs SoC-specific handling. The RX FIFO count bitfield difference was found by comparing Rockchip's vendor kernel 6.1 CAN support for RK3568 and RK3588. Runtime testing on RK3588 also confirms that bits 7:5 are needed. Enable the existing erratum 5 empty-FIFO workaround for RK3588. Heiko reproduced erratum 6 on RK3588, so enable that workaround as well. CAN-FD is enabled for RK3588. The BRS bus-off issue seen in earlier testing was caused by the transmit delay compensation setting. With RKCANFD_REG_TRANSMIT_DELAY_COMPENSATION programmed to 0 on RK3588, CAN-FD with BRS works in local testing. Tested on an embedfire,rk3588-lubancat-5io board with can0/can1 directly connected, no other device on the bus, 60 Ohm bus termination, and a 300 MHz CAN clock. Runtime testing used 500 kbit/s arbitration bitrate and 1, 3 and 5 Mbit/s data bitrates. The 5 Mbit/s data phase test ran for 15 minutes with cangen using BRS and cansequence on the receiver. Both interfaces reported 9528377 packets and 150667356 bytes, with 0 bus-errors, 0 error-warn, 0 error-pass and 0 bus-off events. Co-developed-by: Heiko Stuebner <heiko.stuebner@cherry.de> Signed-off-by: Heiko Stuebner <heiko.stuebner@cherry.de> Tested-by: Heiko Stuebner <heiko@sntech.de> Reviewed-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Cunhao Lu <1579567540@qq.com> Link: https://patch.msgid.link/tencent_207E464D12344B3228096E23A001D6882508@qq.com Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> |
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| .. | ||
| Kconfig | ||
| Makefile | ||
| rockchip_canfd-core.c | ||
| rockchip_canfd-ethtool.c | ||
| rockchip_canfd-rx.c | ||
| rockchip_canfd-timestamp.c | ||
| rockchip_canfd-tx.c | ||
| rockchip_canfd.h | ||