linux-kernel - Re: [PATCH] regulator: palmas: Fix SMPS enable/disable/is

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Date:	Sat, 21 Jun 2014 13:06:53 +0900
From:	Alexandre Courbot <gnurou@...il.com>
To:	Nishanth Menon <nm@...com>
Cc:	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-omap@...r.kernel.org,
	"acourbot@...dia.com" <acourbot@...dia.com>, j-keerthy@...com,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>
Subject: Re: [PATCH] regulator: palmas: Fix SMPS enable/disable/is_enabled

On Sat, Jun 21, 2014 at 2:26 AM, Nishanth Menon <nm@...com> wrote:
> We use regmap regulator ops to enable/disable and check if regulator
> is enabled for various SMPS. However, these depend on valid
> enable_reg, enable_mask and enable_value in regulator descriptor.
>
> Currently we do not populate these for SMPS other than SMPS10, this
> results in spurious results as regmap assumes that the values are
> valid and ends up reading register 0x0 RTC:SECONDS_REG on Palmas
> variants that do have RTC! To fix this, we update proper parameters
> for the descriptor fields.
>
> Further, we want to ensure the behavior consistent with logic
> prior to commit dbabd624d4eec50b6, where, once you do a set_mode,
> enable/disable ensure the logic remains consistent and configures
> Palmas to the configuration that we set with set_mode (since the
> configuration register is common). To do this, we can rely on the
> regulator core's regulator_register behavior where the regulator
> descriptor pointer provided by the regulator driver is stored. (no
> reallocation and copy is done). This lets us update the enable_value
> post registration, to remain consistent with the mode we configure as
> part of set_mode.

Tested-by: Alexandre Courbot <acourbot@...dia.com>

Thanks!
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