netdev - Re: [PATCH] Add Support for Freescale FlexCAN CAN controller

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Message-ID: <4A6D727B.7030304@grandegger.com>
Date:	Mon, 27 Jul 2009 11:25:15 +0200
From:	Wolfgang Grandegger <wg@...ndegger.com>
To:	Sascha Hauer <s.hauer@...gutronix.de>
CC:	Socketcan-core@...ts.berlios.de,
	Linux Netdev List <netdev@...r.kernel.org>
Subject: Re: [PATCH] Add Support for Freescale FlexCAN CAN controller

Sascha Hauer wrote:
> On Fri, Jul 24, 2009 at 04:55:02PM +0200, Wolfgang Grandegger wrote:
>> Hi Sascha,
>>
>> Sascha Hauer wrote:
>>> Hi,
>>>
>>> This patch adds support for the Freescale FlexCAN CAN controller.
>>> The driver has been tested on an i.MX25 SoC with bitrates up to
>>> 1Mbit, remote frames and standard and extenden frames.
>>>
>>> Please review and consider for inclusion.
>> See below...
>>
>>> Sascha
>>>
>>>
>>> >From 94a607390f0d7b181e2ffdfe16a05f3aaca15ab9 Mon Sep 17 00:00:00 2001
>>> From: Sascha Hauer <s.hauer@...gutronix.de>
>>> Date: Tue, 21 Jul 2009 10:47:19 +0200
>>> Subject: [PATCH] Add Flexcan CAN driver
>> The prefix "can:" would be nice here.
> 
> Ok, I'll add it next round.
> 
>>> This core is found on some Freescale SoCs and also some Coldfire
>>> SoCs. Support for Coldfire is missing though at the moment as
>>> they have an older revision of the core which does not have RX FIFO
>>> support.
>>>
>>> Signed-off-by: Sascha Hauer <s.hauer@...gutronix.de>
>>> ---
>>>  drivers/net/can/Kconfig   |    6 +
>>>  drivers/net/can/Makefile  |    1 +
>>>  drivers/net/can/flexcan.c |  696 +++++++++++++++++++++++++++++++++++++++++++++
>>>  3 files changed, 703 insertions(+), 0 deletions(-)
>>>  create mode 100644 drivers/net/can/flexcan.c
>>>
>>> diff --git a/drivers/net/can/Kconfig b/drivers/net/can/Kconfig
>>> index 33821a8..99c6da4 100644
>>> --- a/drivers/net/can/Kconfig
>>> +++ b/drivers/net/can/Kconfig
[...]
>>> +	kfree_skb(skb);
>> Support for echo skb using can_put/get_echo_skb() is missing. It should
>> not be a big deal to add it.
> 
> In fact it's not missing, but the hardware is configured to receive its
> own packets, so this isn't needed.

But the user may disable IFF_ECHO, which should be handled somehow.

Wolfgang.
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