linux-kernel - Re: [PATCHv2 RESEND] i2c: designware-pci: set ideal HCNT, LCNT and SDA hold time value

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Message-ID: <20140311111102.GZ5018@intel.com>
Date:	Tue, 11 Mar 2014 13:11:02 +0200
From:	Mika Westerberg <mika.westerberg@...ux.intel.com>
To:	Chew Chiau Ee <chiau.ee.chew@...el.com>
Cc:	Wolfram Sang <wsa@...-dreams.de>,
	Lim Lee Booi <lee.booi.lim@...el.com>,
	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCHv2 RESEND] i2c: designware-pci: set ideal HCNT, LCNT and
 SDA hold time value

On Tue, Mar 11, 2014 at 07:33:45PM +0800, Chew Chiau Ee wrote:
> From: Chew, Chiau Ee <chiau.ee.chew@...el.com>
> 
> On Intel BayTrail, there was case whereby the resulting fast mode
> bus speed becomes slower (~20% slower compared to expected speed)
> if using the HCNT/LCNT calculated in the core layer. Thus, this
> patch is added to allow pci glue layer to pass in optimal
> HCNT/LCNT/SDA hold time values to core layer since the core
> layer supports cofigurable HCNT/LCNT/SDA hold time values now.
> 
> Signed-off-by: Chew, Chiau Ee <chiau.ee.chew@...el.com>

Acked-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
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