linux-kernel - Re: [PATCH] regulator: twl-regulator: fix n

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Date:	Mon, 30 May 2011 13:51:06 +0100
From:	Liam Girdwood <lrg@...mlogic.co.uk>
To:	Colin Cross <ccross@...roid.com>
Cc:	linux-kernel@...r.kernel.org,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Subject: Re: [PATCH] regulator: twl-regulator: fix n_voltages for twl6030
 variable LDOs

On Fri, 2011-05-27 at 12:25 -0700, Colin Cross wrote:
> The n_voltages initializer for the TWL6030_ADJUSTABLE_LDO macro is
> off by one, causing the the highest supported voltage to be
> unreachable.  Setting the machine constraints to only allow the
> highest voltage causes errors:
> 
> machine_constraints_voltage: VAUX3_6030: unsupportable voltage constraints
> twl_reg twl_reg.39: can't register VAUX3_6030, -22
> twl_reg: probe of twl_reg.39 failed with error -22
> 
> This patch fixes the off by one error.  Tested by setting
> VAUX3_6030 to 3.3V.
> 
> Signed-off-by: Colin Cross <ccross@...roid.com>
> ---
>  drivers/regulator/twl-regulator.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/regulator/twl-regulator.c b/drivers/regulator/twl-regulator.c
> index 6a29285..afd9c7e 100644
> --- a/drivers/regulator/twl-regulator.c
> +++ b/drivers/regulator/twl-regulator.c
> @@ -520,7 +520,7 @@ static struct regulator_ops twl6030_fixed_resource = {
>  	.desc = { \
>  		.name = #label, \
>  		.id = TWL6030_REG_##label, \
> -		.n_voltages = (max_mVolts - min_mVolts)/100, \
> +		.n_voltages = (max_mVolts - min_mVolts)/100 + 1, \
>  		.ops = &twl6030ldo_ops, \
>  		.type = REGULATOR_VOLTAGE, \
>  		.owner = THIS_MODULE, \

Applied.

Thanks

Liam

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