From: Sen Chu <sen.chu@mediatek.com>
Date: Thu, 18 May 2023 04:06:46 +0000 (+0800)
Subject: regulator: mt6359: add read check for PMIC MT6359
X-Git-Tag: v6.3.5~7
X-Git-Url: http://git.itanic.dy.fi/?p=linux-stable;a=commitdiff_plain;h=85c45023adaba01ddb42c8f9a4384ec253d53632

regulator: mt6359: add read check for PMIC MT6359

commit a511637502b1caa135046d0f8fdabd55a31af8ef upstream.

Add hardware version read check for PMIC MT6359

Signed-off-by: Sen Chu <sen.chu@mediatek.com
Fixes: 4cfc96547512 ("regulator: mt6359: Add support for MT6359P regulator")
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com
Link: https://lore.kernel.org/r/20230518040646.8730-1-sen.chu@mediatek.com
Signed-off-by: Mark Brown <broonie@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/regulator/mt6359-regulator.c b/drivers/regulator/mt6359-regulator.c
index de3b0462832c..f94f87c5407a 100644
--- a/drivers/regulator/mt6359-regulator.c
+++ b/drivers/regulator/mt6359-regulator.c
@@ -951,9 +951,12 @@ static int mt6359_regulator_probe(struct platform_device *pdev)
 	struct regulator_config config = {};
 	struct regulator_dev *rdev;
 	struct mt6359_regulator_info *mt6359_info;
-	int i, hw_ver;
+	int i, hw_ver, ret;
+
+	ret = regmap_read(mt6397->regmap, MT6359P_HWCID, &hw_ver);
+	if (ret)
+		return ret;
 
-	regmap_read(mt6397->regmap, MT6359P_HWCID, &hw_ver);
 	if (hw_ver >= MT6359P_CHIP_VER)
 		mt6359_info = mt6359p_regulators;
 	else