linux-kernel - [PATCH] regulator: tps65219: use generic set

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Fri,  3 Feb 2023 15:01:19 +0100
From:   Jerome Neanne <jneanne@...libre.com>
To:     tony@...mide.com, lgirdwood@...il.com, broonie@...nel.org
Cc:     linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org,
        khilman@...libre.com, nm@...com, msp@...libre.com,
        Jerome Neanne <jneanne@...libre.com>
Subject: [PATCH] regulator: tps65219: use generic set_bypass()

Due to wrong interpretation of the specification,
custom implementation was used instead of standard regmap helper.
LINK: https://lore.kernel.org/all/c2014039-f1e8-6976-33d6-52e2dd4e7b66@baylibre.com/

Fixes: c12ac5fc3e0a ("regulator: drivers: Add TI TPS65219 PMIC regulators support")

Regulator does NOT require to be off to be switched to bypass mode.

Signed-off-by: Jerome Neanne <jneanne@...libre.com>
---
 drivers/regulator/tps65219-regulator.c | 20 +-------------------
 1 file changed, 1 insertion(+), 19 deletions(-)

diff --git a/drivers/regulator/tps65219-regulator.c b/drivers/regulator/tps65219-regulator.c
index 070159cb5f09..58f6541b6417 100644
--- a/drivers/regulator/tps65219-regulator.c
+++ b/drivers/regulator/tps65219-regulator.c
@@ -173,24 +173,6 @@ static unsigned int tps65219_get_mode(struct regulator_dev *dev)
 		return REGULATOR_MODE_NORMAL;
 }
 
-/*
- * generic regulator_set_bypass_regmap does not fully match requirements
- * TPS65219 Requires explicitly that regulator is disabled before switch
- */
-static int tps65219_set_bypass(struct regulator_dev *dev, bool enable)
-{
-	struct tps65219 *tps = rdev_get_drvdata(dev);
-	unsigned int rid = rdev_get_id(dev);
-
-	if (dev->desc->ops->is_enabled(dev)) {
-		dev_err(tps->dev,
-			"%s LDO%d enabled, must be shut down to set bypass ",
-			__func__, rid);
-		return -EBUSY;
-	}
-	return regulator_set_bypass_regmap(dev, enable);
-}
-
 /* Operations permitted on BUCK1/2/3 */
 static const struct regulator_ops tps65219_bucks_ops = {
 	.is_enabled		= regulator_is_enabled_regmap,
@@ -217,7 +199,7 @@ static const struct regulator_ops tps65219_ldos_1_2_ops = {
 	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
 	.list_voltage		= regulator_list_voltage_linear_range,
 	.map_voltage		= regulator_map_voltage_linear_range,
-	.set_bypass		= tps65219_set_bypass,
+	.set_bypass		= regulator_set_bypass_regmap,
 	.get_bypass		= regulator_get_bypass_regmap,
 };
 
-- 
2.34.1