linux-kernel - Applied "regulator: regmap helpers - support overlapping linear ranges" to the regulator tree

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Date:   Tue, 28 Aug 2018 21:55:01 +0100 (BST)
From:   Mark Brown <broonie@...nel.org>
To:     Matti Vaittinen <matti.vaittinen@...rohmeurope.com>
Cc:     Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org
Subject: Applied "regulator: regmap helpers - support overlapping linear ranges" to the regulator tree

The patch

   regulator: regmap helpers - support overlapping linear ranges

has been applied to the regulator tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From e7d80b6b848b4b5f83d3fbee9fd042d036ede9c6 Mon Sep 17 00:00:00 2001
From: Matti Vaittinen <matti.vaittinen@...rohmeurope.com>
Date: Wed, 22 Aug 2018 12:53:27 +0300
Subject: [PATCH] regulator: regmap helpers - support overlapping linear ranges

Don't give up voltage mapping if first range with suitable min/max uV
does not provide the wanted voltage.

Signed-off-by: Matti Vaittinen <matti.vaittinen@...rohmeurope.com>
Signed-off-by: Mark Brown <broonie@...nel.org>
---
 drivers/regulator/helpers.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/regulator/helpers.c b/drivers/regulator/helpers.c
index 2ae7c3ac5940..ef09021dc46e 100644
--- a/drivers/regulator/helpers.c
+++ b/drivers/regulator/helpers.c
@@ -321,17 +321,18 @@ int regulator_map_voltage_linear_range(struct regulator_dev *rdev,

 		ret += range->min_sel;

-		break;
+		/*
+		 * Map back into a voltage to verify we're still in bounds.
+		 * If we are not, then continue checking rest of the ranges.
+		 */
+		voltage = rdev->desc->ops->list_voltage(rdev, ret);
+		if (voltage >= min_uV && voltage <= max_uV)
+			break;
 	}

 	if (i == rdev->desc->n_linear_ranges)
 		return -EINVAL;

-	/* Map back into a voltage to verify we're still in bounds */
-	voltage = rdev->desc->ops->list_voltage(rdev, ret);
-	if (voltage < min_uV || voltage > max_uV)
-		return -EINVAL;
-
 	return ret;
 }
 EXPORT_SYMBOL_GPL(regulator_map_voltage_linear_range);
-- 
2.18.0