linux-kernel - RE: About bittiming calculation result

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Message-ID: <E2BAACFF191C4175854E6B2EB9135BE5@hacdom.okisemi.com>
Date:	Tue, 8 Feb 2011 10:09:48 +0900
From:	"Tomoya MORINAGA" <tomoya-linux@....okisemi.com>
To:	"'Wolfgang Grandegger'" <wg@...ndegger.com>
Cc:	<socketcan-core@...ts.berlios.de>, <netdev@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: RE: About bittiming calculation result

On Monday, February 07, 2011 9:01 PM, Wolfgang Grandegger wrote
> 
> Well, only prop_seg+phase_seg=tseg1 is relevant and the 
> pch_can driver sets the allowed minimum "tseg1_min1" currently to 1:
> 
> static struct can_bittiming_const pch_can_bittiming_const = {
>         .name = KBUILD_MODNAME,
>         .tseg1_min = 1,
>         .tseg1_max = 16,
>         .tseg2_min = 1,
>         .tseg2_max = 8,
>         .sjw_max = 4,
>         .brp_min = 1,
>         .brp_max = 1024, /* 6bit + extended 4bit */
>         .brp_inc = 1,
> };
> 
> > seg1/seg2/sjw/prop_seg must be more than 1 ?
> 
> Then "tseg1_min" should be set to *2*.

Though some drivers accepted by upstream have parameter "tseg1_min" as 1,
Sould we release the patch like below ?
 -         .tseg1_min = 1,
+         .tseg1_min = 2,

Thanks,
-----------------------------------------
Tomoya MORINAGA
OKI SEMICONDUCTOR CO., LTD.

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