Re: [PATCH 1/2] can: rcar_can: Add r8a7795 support
From: Marc Kleine-Budde <mkl@pengutronix.de>
Date: 2016-02-29 12:47:04
Also in:
linux-arm-kernel, linux-can, linux-renesas-soc, netdev
Possibly related (same subject, not in this thread)
- 2016-02-29 · RE: [PATCH 1/2] can: rcar_can: Add r8a7795 support · Ramesh Shanmugasundaram <hidden>
- 2016-02-29 · Re: [PATCH 1/2] can: rcar_can: Add r8a7795 support · Geert Uytterhoeven <geert@linux-m68k.org>
- 2016-02-29 · [PATCH 1/2] can: rcar_can: Add r8a7795 support · Ramesh Shanmugasundaram <hidden>
On 02/29/2016 11:00 AM, Marc Kleine-Budde wrote:
I think it's better to fix the algorithm. I'll look into it.
What about:
./can-calc-bit-timing -c 39999998 rcar_can Bit timing parameters for rcar_can with 39.999998 MHz ref clock nominal real Bitrt nom real SampP Bitrate TQ[ns] PrS PhS1 PhS2 SJW BRP Bitrate Error SampP SampP Error CiBCR 1000000 125 2 3 2 1 5 999999 0.0% 75.0% 75.0% 0.0% 0x40040100 800000 125 3 4 2 1 5 799999 0.0% 80.0% 80.0% 0.0% 0x60040100 500000 125 6 7 2 1 5 499999 0.0% 87.5% 87.5% 0.0% 0xc0040100 250000 250 6 7 2 1 10 249999 0.0% 87.5% 87.5% 0.0% 0xc0090100 125000 500 6 7 2 1 20 124999 0.0% 87.5% 87.5% 0.0% 0xc0130100 100000 625 6 7 2 1 25 99999 0.0% 87.5% 87.5% 0.0% 0xc0180100 50000 1250 6 7 2 1 50 49999 0.0% 87.5% 87.5% 0.0% 0xc0310100 20000 3125 6 7 2 1 125 19999 0.0% 87.5% 87.5% 0.0% 0xc07c0100 10000 6250 6 7 2 1 250 9999 0.0% 87.5% 87.5% 0.0% 0xc0f90100
But I've to port the algorithm from can-calc-bit-timing to the kernel. Marc -- Pengutronix e.K. | Marc Kleine-Budde | Industrial Linux Solutions | Phone: +49-231-2826-924 | Vertretung West/Dortmund | Fax: +49-5121-206917-5555 | Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de |
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