On Thu, Apr 28, 2016 at 01:23:07PM +0100, Ramesh Shanmugasundaram wrote: > 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 <ramesh.shanmugasundaram@xxxxxxxxxxxxxx> > --- > .../devicetree/bindings/net/can/rcar_canfd.txt | 89 ++ What happened to my ack? > drivers/net/can/Kconfig | 1 + > drivers/net/can/Makefile | 1 + > drivers/net/can/rcar/Kconfig | 11 + > drivers/net/can/rcar/Makefile | 5 + > drivers/net/can/rcar/rcar_canfd.c | 1624 ++++++++++++++++++++ > 6 files changed, 1731 insertions(+) > create mode 100644 Documentation/devicetree/bindings/net/can/rcar_canfd.txt > create mode 100644 drivers/net/can/rcar/Kconfig > create mode 100644 drivers/net/can/rcar/Makefile > create mode 100644 drivers/net/can/rcar/rcar_canfd.c
