linux-kernel - [PATCH 4.19 136/338] power: supply: bq24190_charger: Fix bq24190_vbus_is

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Date:   Thu, 14 Apr 2022 15:10:39 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Bastien Nocera <hadess@...ess.net>,
        Hans de Goede <hdegoede@...hat.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Sebastian Reichel <sebastian.reichel@...labora.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 136/338] power: supply: bq24190_charger: Fix bq24190_vbus_is_enabled() wrong false return

From: Hans de Goede <hdegoede@...hat.com>

[ Upstream commit f7731754fdce33dad19be746f647d6ac47c5d695 ]

The datasheet says that the BQ24190_REG_POC_CHG_CONFIG bits can
have a value of either 10(0x2) or 11(0x3) for OTG (5V boost regulator)
mode.

Sofar bq24190_vbus_is_enabled() was only checking for 10 but some BIOS-es
uses 11 when enabling the regulator at boot.

Make bq24190_vbus_is_enabled() also check for 11 so that it does not
wrongly returns false when the bits are set to 11.

Fixes: 66b6bef2c4e0 ("power: supply: bq24190_charger: Export 5V boost converter as regulator")
Cc: Bastien Nocera <hadess@...ess.net>
Signed-off-by: Hans de Goede <hdegoede@...hat.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@...labora.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/power/supply/bq24190_charger.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/power/supply/bq24190_charger.c b/drivers/power/supply/bq24190_charger.c
index 863208928cf0..c830343be61e 100644
--- a/drivers/power/supply/bq24190_charger.c
+++ b/drivers/power/supply/bq24190_charger.c
@@ -43,6 +43,7 @@
 #define BQ24190_REG_POC_CHG_CONFIG_DISABLE		0x0
 #define BQ24190_REG_POC_CHG_CONFIG_CHARGE		0x1
 #define BQ24190_REG_POC_CHG_CONFIG_OTG			0x2
+#define BQ24190_REG_POC_CHG_CONFIG_OTG_ALT		0x3
 #define BQ24190_REG_POC_SYS_MIN_MASK		(BIT(3) | BIT(2) | BIT(1))
 #define BQ24190_REG_POC_SYS_MIN_SHIFT		1
 #define BQ24190_REG_POC_SYS_MIN_MIN			3000
@@ -568,7 +569,11 @@ static int bq24190_vbus_is_enabled(struct regulator_dev *dev)
 	pm_runtime_mark_last_busy(bdi->dev);
 	pm_runtime_put_autosuspend(bdi->dev);
 
-	return ret ? ret : val == BQ24190_REG_POC_CHG_CONFIG_OTG;
+	if (ret)
+		return ret;
+
+	return (val == BQ24190_REG_POC_CHG_CONFIG_OTG ||
+		val == BQ24190_REG_POC_CHG_CONFIG_OTG_ALT);
 }
 
 static const struct regulator_ops bq24190_vbus_ops = {
-- 
2.34.1