linux-kernel - Re: [PATCH 0/3] regulator: tps6586x: add version detection and voltage tables

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Message-ID: <20131128081351.GA26502@ulmo.nvidia.com>
Date:	Thu, 28 Nov 2013 09:13:53 +0100
From:	Thierry Reding <thierry.reding@...il.com>
To:	Stefan Agner <stefan@...er.ch>
Cc:	swarren@...dotorg.org, sameo@...ux.intel.com, dev@...xeye.de,
	mark.rutland@....com, linux-tegra@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Kai Poggensee <kai.poggensee@...onic-design.de>
Subject: Re: [PATCH 0/3] regulator: tps6586x: add version detection and
 voltage tables

On Wed, Nov 27, 2013 at 12:45:42AM +0100, Stefan Agner wrote:
> This patchset adds version detection for the tps6586x mfd family. This is
> required because some regulator versions use different voltage tables. The
> regulator driver now uses the right voltage table according to the
> version.
> 
> The required voltage for the SM2 converter on the Colibri T20 is 1.8V,
> however, the device tree states 3.7V right now. Newer versions (>=V1.2) of
> the Colibri T20 module use the TPS658643, whereas old ones (<V1.2) use the
> TPS658623. Both of them have a different voltage table for SM2. The
> current device tree contains a voltage which results in 1.8V for the older
> TPS658623. Since the regulator driver has correct voltage tables for both
> regulator versions now, we can request the correct 1.8V from the device
> tree.
> 
> Tested on Colibri T20 V1.1 and V1.2.
> 
> Stefan Agner (3):
>   mfd: tps6586x: add version detection
>   regulator: tps6586x: add voltage table for tps658643
>   ARM: tegra: set SM2 voltage correct
> 
>  arch/arm/boot/dts/tegra20-colibri-512.dtsi |  4 +-
>  drivers/mfd/tps6586x.c                     | 41 +++++++++++--
>  drivers/regulator/tps6586x-regulator.c     | 97 ++++++++++++++++++++----------
>  include/linux/mfd/tps6586x.h               |  9 +++
>  4 files changed, 110 insertions(+), 41 deletions(-)

Adding Kai Poggensee on Cc. There was a variant of the Tamonten board
with one of these versions of the chip (or maybe it was even yet another
one).

Thierry

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