linux-kernel - [PATCH] regulator: core: Update regulator_is_supported

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Message-Id: <1352458309-18141-1-git-send-email-tushar.behera@linaro.org>
Date:	Fri,  9 Nov 2012 16:21:49 +0530
From:	Tushar Behera <tushar.behera@...aro.org>
To:	linux-kernel@...r.kernel.org
Cc:	broonie@...nsource.wolfsonmicro.com, philipspatches@...il.com,
	patches@...aro.org
Subject: [PATCH] regulator: core: Update regulator_is_supported_voltage for fixed voltages

Commit c5f3939b8fe0 ("regulator: core: Support fixed voltages in
regulator_is_supported_voltage()") adds support for fixed regulators
in regulator_is_supported_voltage.

In case of fixed regulators for which voltage cannot be changed,
regulator_is_supported_voltage should return success only if the
min_uV and max_uV parameters are same and it is equal to the current
voltage of the regulator.

Signed-off-by: Tushar Behera <tushar.behera@...aro.org>
---

Currently this patch breaks MMC support for boards on which vmmc is a
fixed regulator and the voltage is not equal to either of 3.3v, 3.0v
or 1.8v. Earlier it used to work if the voltage was less than 3.3v.

 drivers/regulator/core.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 1a35251..4a377a7 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1974,7 +1974,7 @@ int regulator_is_supported_voltage(struct regulator *regulator,
 	if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_VOLTAGE)) {
 		ret = regulator_get_voltage(regulator);
 		if (ret >= 0)
-			return (min_uV >= ret && ret <= max_uV);
+			return (ret == min_uV && ret == max_uV);
 		else
 			return ret;
 	}
-- 
1.7.4.1

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