linux-kernel - Re: [PATCH v2 2/2] phy: ti-pipe3: Fix SATA across suspend/resume

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Date:	Mon, 12 Jan 2015 11:23:51 +0200
From:	Roger Quadros <rogerq@...com>
To:	Kishon Vijay Abraham I <kishon@...com>, <tony@...mide.com>
CC:	<nm@...com>, <balbi@...com>, <george.cherian@...com>,
	<nsekhar@...com>, <linux-omap@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH v2 2/2] phy: ti-pipe3: Fix SATA across suspend/resume

On 09/01/15 15:59, Kishon Vijay Abraham I wrote:
> Hi Roger,
> 
> On Thursday 08 January 2015 04:47 PM, Roger Quadros wrote:
>> Failed test case: Boot without SATA drive connected. Suspend/resume
>> the board and then connect SATA drive. It fails to enumerate.
>>
>> Due to Errata i783 "SATA Lockup After SATA DPLL Unlock/Relock"
>> we can't allow SATA DPLL to be in the unlocked state.
>> The SATA refclk (sata_ref_clk) is the source of the SATA_DPLL.
>> Till now this clock was controlled by the AHCI SATA driver and was being
>> shut off  during system suspend (if the SATA drive was not already attached)
>> causing the SATA DPLL to be unlocked and so causing errata i783.
>>
>> To prevent sata_ref_clk from being disabled, we move the control of
>> this clock from the SATA AHCI driver to the SATA PHY driver and prevent
>> it from being disabled.
>>
>> This also fixes the issue of SATA not working on OMAP5/DRA7 when
>> AHCI platform driver is built as a module.
> 
> I feel the dt patches and the PHY patches can go separately. Can you split and
> re-send?

OK. will re-send.

cheers,
-roger
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