linux-kernel - Re: wl12xx board_ref

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Message-ID: <AANLkTinzDFs5ve=aK-n=+_cxj2p3kyuZ9Dos8Td1tYT2@mail.gmail.com>
Date:	Wed, 27 Oct 2010 23:42:07 +0200
From:	Ohad Ben-Cohen <ohad@...ery.com>
To:	Elvis Dowson <elvis.dowson@....com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-wireless@...r.kernel.org
Subject: Re: wl12xx board_ref_clock

Hi Elvis,

On Wed, Oct 27, 2010 at 7:59 PM, Elvis Dowson <elvis.dowson@....com> wrote:
>                  To which device does board_ref_clock refer to?

An external clock hardwired to your device. You should ask the vendor
of your board which one is it.

> On my board, the SDIO CLK line from the MMC2 controller is connected to the LSR TiWi wlan module.

This has nothing to do with the SDIO clk.

> What is the impact of not specifying a board_ref_clock?

Bad timing issues. Expect bad WLAN behavior (but not poof of smoke).

PS - please don't CC LKML on these issues. for wl1271 questions,
please CC linux-wireless

Thanks,
Ohad.
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