linux-kernel - Re: [PATCH] regulator: vexpress: Add missing n

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Date:	Tue, 11 Dec 2012 13:50:59 +0000
From:	Pawel Moll <pawel.moll@....com>
To:	Axel Lin <axel.lin@...ics.com>
Cc:	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Liam Girdwood <lrg@...com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] regulator: vexpress: Add missing n_voltages setting

On Tue, 2012-12-11 at 08:04 +0000, Axel Lin wrote:
> Otherwise regulator_can_change_voltage() return 0 for this driver.
> 
> Signed-off-by: Axel Lin <axel.lin@...ics.com>

We've been here before, haven't we? ;-) So I'll just repeat myself -
this regulator does _not_ have operating points. What I believe should
be fixed is the mentioned function itself, something like the patch
below (untested)...

Pawel

8<--------------------
>From 1cafb644747c276a6c601096b8dc0972d10daac7 Mon Sep 17 00:00:00 2001
From: Pawel Moll <pawel.moll@....com>
Date: Tue, 11 Dec 2012 13:44:07 +0000
Subject: [PATCH] regulator: core: Fix regulator_can_change_voltage() for
 continuous case

Function regulator_can_change_voltage() didn't take regulators with
continuous voltage range under consideration. Fixed now.

Signed-off-by: Pawel Moll <pawel.moll@....com>
---
 drivers/regulator/core.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index cd1b201..92768c3 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1886,7 +1886,8 @@ int regulator_can_change_voltage(struct regulator *regulator)
 
 	if (rdev->constraints &&
 	    rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_VOLTAGE &&
-	    rdev->desc->n_voltages > 1)
+	    (rdev->desc->n_voltages > 1 ||
+	     rdev->desc->continuous_voltage_range))
 		return 1;
 
 	return 0;
-- 
1.7.10.4



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