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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Axel Lin <axel.lin@ingics.com>,
        Mark Brown <broonie@kernel.org>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.19 169/187] regulator: act8865: Fix act8600_sudcdc_voltage_ranges setting
Date:   Thu,  4 Apr 2019 10:48:26 +0200
Message-Id: <20190404084611.053542538@linuxfoundation.org>
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4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

[ Upstream commit f01a7beb6791f1c419424c1a6958b7d0a289c974 ]

The act8600_sudcdc_voltage_ranges setting does not match the datasheet.

The problems in below entry:
  REGULATOR_LINEAR_RANGE(19000000, 191, 255, 400000),

1. The off-by-one min_sel causes wrong volatage calculation.
   The min_sel should be 192.
2. According to the datasheet[1] Table 7. (on page 43):
   The selector 248 (0b11111000) ~ 255 (0b11111111) are 41.400V.

Also fix off-by-one for ACT8600_SUDCDC_VOLTAGE_NUM.

[1] https://active-semi.com/wp-content/uploads/ACT8600_Datasheet.pdf

Fixes: df3a950e4e73 ("regulator: act8865: Add act8600 support")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/regulator/act8865-regulator.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/regulator/act8865-regulator.c b/drivers/regulator/act8865-regulator.c
index 21e20483bd91..e0239cf3f56d 100644
--- a/drivers/regulator/act8865-regulator.c
+++ b/drivers/regulator/act8865-regulator.c
@@ -131,7 +131,7 @@
  * ACT8865 voltage number
  */
 #define	ACT8865_VOLTAGE_NUM	64
-#define ACT8600_SUDCDC_VOLTAGE_NUM	255
+#define ACT8600_SUDCDC_VOLTAGE_NUM	256
 
 struct act8865 {
 	struct regmap *regmap;
@@ -222,7 +222,8 @@ static const struct regulator_linear_range act8600_sudcdc_voltage_ranges[] = {
 	REGULATOR_LINEAR_RANGE(3000000, 0, 63, 0),
 	REGULATOR_LINEAR_RANGE(3000000, 64, 159, 100000),
 	REGULATOR_LINEAR_RANGE(12600000, 160, 191, 200000),
-	REGULATOR_LINEAR_RANGE(19000000, 191, 255, 400000),
+	REGULATOR_LINEAR_RANGE(19000000, 192, 247, 400000),
+	REGULATOR_LINEAR_RANGE(41400000, 248, 255, 0),
 };
 
 static struct regulator_ops act8865_ops = {
-- 
2.19.1