linux-kernel - Re: [PATCH V2] mfd: da9052: Fix volatile register definition ommissions

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Message-ID: <20140211162743.GC15081@lee--X1>
Date:	Tue, 11 Feb 2014 16:27:43 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	"Anthony Olech <anthony.olech.opensource@...semi.com>" 
	<Anthony.Olech.OpenSource@...semi.com>
Cc:	Samuel Ortiz <sameo@...ux.intel.com>, linux-kernel@...r.kernel.org,
	David Dajun Chen <david.chen@...semi.com>
Subject: Re: [PATCH V2] mfd: da9052: Fix volatile register definition
 ommissions

On Thu, 06 Feb 2014, Anthony Olech <anthony.olech.opensource@...semi.com> wrote:

> Three of the PMIC registers have some bits that are changed
> autonomously by the PMIC itself (some time) after being set
> by some component driver of the DA9052 PMIC and hence they
> need to be marked as volatile so that the regmap API will
> not cache their values.
> 
> Signed-off-by: Anthony Olech <anthony.olech.opensource@...semi.com>
> Acked-by: David Dajun Chen <david.chen@...semi.com>
> ---
> 
> This patch is relative to linux-next repository tag next-20140206
> 
> The problem was detected whilst running a scripted set of functional
> regression tests whilst investigating a different problem.
> 
> This patch has been test compiled on an amd64 server for both x86
> and arm targets.
> 
> This patch has been spot verified using an SMDK6410 platform
> fly-wired to a Dialog da9053 EVB.
> 
> The bug that this patch fixes affects two components of DA9052 namely:
> 
> WATCHDOG - the first kick will work but sebsequent ones will not
>            thus the watchdog will timeout at 2 x interval.
> 
> REGULATORS - the first change to any DA9052/DA9053  BUCK voltage
>              will be actioned, but sebsequent ones will not.
> 
>  drivers/mfd/da9052-core.c |    3 +++
>  1 file changed, 3 insertions(+)

Applied, thanks.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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