linux-kernel - [PATCH 1/4] regulator: tps6586x: Fix list minimal voltage setting for LDO0

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Message-ID: <1332553050.14114.1.camel@phoenix>
Date:	Sat, 24 Mar 2012 09:37:30 +0800
From:	Axel Lin <axel.lin@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Mike Rapoport <mike@...pulab.co.il>,
	Danny Huang <dahuang@...dia.com>, Liam Girdwood <lrg@...com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Subject: [PATCH 1/4] regulator: tps6586x: Fix list minimal voltage setting
 for LDO0

According to the datasheet, LDO0 has minimal voltage 1.2V rather than 1.25V.

Table 3-39. VLDO0[2:0] Settings
VLDOx[2:0] VOUT (V) VLDOx[2:0] VOUT (V)
000        1.20     100        2.70
001        1.50     101        2.85
010        1.80     110        3.10
011        2.50     111        3.30

Signed-off-by: Axel Lin <axel.lin@...il.com>
---
 drivers/regulator/tps6586x-regulator.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/drivers/regulator/tps6586x-regulator.c b/drivers/regulator/tps6586x-regulator.c
index 29b615c..cfc1f16 100644
--- a/drivers/regulator/tps6586x-regulator.c
+++ b/drivers/regulator/tps6586x-regulator.c
@@ -79,6 +79,11 @@ static int tps6586x_ldo_list_voltage(struct regulator_dev *rdev,
 				     unsigned selector)
 {
 	struct tps6586x_regulator *info = rdev_get_drvdata(rdev);
+	int rid = rdev_get_id(rdev);
+
+	/* LDO0 has minimal voltage 1.2V rather than 1.25V */
+	if ((rid == TPS6586X_ID_LDO_0) && (selector == 0))
+		return (info->voltages[0] - 50) * 1000;
 
 	return info->voltages[selector] * 1000;
 }
-- 
1.7.5.4



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