Hi Rob, > 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? Sorry, I missed it when I updated the patch. I mentioned it in cover letter though. I will request the CAN maintainer to add it if this is accepted or otherwise I will add it to the next patch series. --- Changes since v3: * Split v3 patch into two (Marc K) (1) Introduce rcar_canfd.c driver in drivers/net/can/rcar dir (2) Move rcar_can.c driver to new drivers/net/can/rcar dir * Added Acked-by Rob H for the bindings --- Thanks, Ramesh -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
