linux-kernel - Re: [PATCH 5/9] mfd: Add UART support for the ST-Ericsson CG2900.

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Date:	Mon, 6 Dec 2010 15:54:39 +0100
From:	Vitaly Wool <vitalywool@...il.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Par-Gunnar Hjalmdahl <pghatwork@...il.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	linus.walleij@...ricsson.com, linux-bluetooth@...r.kernel.org,
	linux-kernel@...r.kernel.org, Marcel Holtmann <marcel@...tmann.org>
Subject: Re: [PATCH 5/9] mfd: Add UART support for the ST-Ericsson CG2900.

Hi Arnd,

On Mon, Dec 6, 2010 at 3:06 PM, Arnd Bergmann <arnd@...db.de> wrote:

> hci_ll is not the line discipline but the a TI specific uart protocol.
> The line discipline driver (hci_ldisc.c) is shared across all protocols
> (h4, ll, ...) and gets extended slightly so it can deal with cg2900
> in addition to the existing HCIs. The rest of the cg2900 support is
> about adding more hci_uart_protos.

I was referring to hci_ll as to the line discipline driver, not the
line discipline itself.

The thing is, there are different Bluetooth combo chips which use HCI
to encapsulate commands to the sub-chips behind, and there's also the
implementation for TI chip doing that which is in the mainline. So
instead of keeping reinventing the wheel, I think it's fairly
beneficial for everything if we finally agree on something that works
for all the combo chips of the type.

Thanks,
   Vitaly
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