From: Chen-Yu Tsai <wenst@chromium.org> To: Matthias Brugger <matthias.bgg@gmail.com>, AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>, Mark Brown <broonie@kernel.org> Cc: Chen-Yu Tsai <wenst@chromium.org>, Zhiyong Tao <zhiyong.tao@mediatek.com>, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org Subject: [PATCH] regulator: mt6358: return error for get/set mode op on linear range LDO Date: Tue, 19 Sep 2023 16:36:46 +0800 [thread overview] Message-ID: <20230919083647.3909889-1-wenst@chromium.org> (raw) The buck and linear range (VSRAM_*) regulators share one set of ops. This set includes support for get/set mode. However this only makes sense for buck regulators, not LDOs. The callbacks were not checking whether the register offset and/or mask for mode setting was valid or not. This ends up making the kernel report "normal" mode operation for the LDOs. Instead, make the callbacks return -EINVAL if the mode register mask is not set, signaling that it is not supported. Fixes: f67ff1bd58f0 ("regulator: mt6358: Add support for MT6358 regulator") Signed-off-by: Chen-Yu Tsai <wenst@chromium.org> --- drivers/regulator/mt6358-regulator.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/regulator/mt6358-regulator.c b/drivers/regulator/mt6358-regulator.c index b9cda2210c33..120c60d40ed4 100644 --- a/drivers/regulator/mt6358-regulator.c +++ b/drivers/regulator/mt6358-regulator.c @@ -408,6 +408,9 @@ static int mt6358_regulator_set_mode(struct regulator_dev *rdev, const struct mt6358_regulator_info *info = to_regulator_info(rdev->desc); int val; + if (!info->modeset_mask) + return -EINVAL; + switch (mode) { case REGULATOR_MODE_FAST: val = MT6358_BUCK_MODE_FORCE_PWM; @@ -433,6 +436,9 @@ static unsigned int mt6358_regulator_get_mode(struct regulator_dev *rdev) const struct mt6358_regulator_info *info = to_regulator_info(rdev->desc); int ret, regval; + if (!info->modeset_mask) + return -EINVAL; + ret = regmap_read(rdev->regmap, info->modeset_reg, ®val); if (ret != 0) { dev_err(&rdev->dev, -- 2.42.0.459.ge4e396fd5e-goog
WARNING: multiple messages have this Message-ID (diff)
From: Chen-Yu Tsai <wenst@chromium.org> To: Matthias Brugger <matthias.bgg@gmail.com>, AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>, Mark Brown <broonie@kernel.org> Cc: Chen-Yu Tsai <wenst@chromium.org>, Zhiyong Tao <zhiyong.tao@mediatek.com>, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org Subject: [PATCH] regulator: mt6358: return error for get/set mode op on linear range LDO Date: Tue, 19 Sep 2023 16:36:46 +0800 [thread overview] Message-ID: <20230919083647.3909889-1-wenst@chromium.org> (raw) The buck and linear range (VSRAM_*) regulators share one set of ops. This set includes support for get/set mode. However this only makes sense for buck regulators, not LDOs. The callbacks were not checking whether the register offset and/or mask for mode setting was valid or not. This ends up making the kernel report "normal" mode operation for the LDOs. Instead, make the callbacks return -EINVAL if the mode register mask is not set, signaling that it is not supported. Fixes: f67ff1bd58f0 ("regulator: mt6358: Add support for MT6358 regulator") Signed-off-by: Chen-Yu Tsai <wenst@chromium.org> --- drivers/regulator/mt6358-regulator.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/regulator/mt6358-regulator.c b/drivers/regulator/mt6358-regulator.c index b9cda2210c33..120c60d40ed4 100644 --- a/drivers/regulator/mt6358-regulator.c +++ b/drivers/regulator/mt6358-regulator.c @@ -408,6 +408,9 @@ static int mt6358_regulator_set_mode(struct regulator_dev *rdev, const struct mt6358_regulator_info *info = to_regulator_info(rdev->desc); int val; + if (!info->modeset_mask) + return -EINVAL; + switch (mode) { case REGULATOR_MODE_FAST: val = MT6358_BUCK_MODE_FORCE_PWM; @@ -433,6 +436,9 @@ static unsigned int mt6358_regulator_get_mode(struct regulator_dev *rdev) const struct mt6358_regulator_info *info = to_regulator_info(rdev->desc); int ret, regval; + if (!info->modeset_mask) + return -EINVAL; + ret = regmap_read(rdev->regmap, info->modeset_reg, ®val); if (ret != 0) { dev_err(&rdev->dev, -- 2.42.0.459.ge4e396fd5e-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2023-09-19 8:36 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-09-19 8:36 Chen-Yu Tsai [this message] 2023-09-19 8:36 ` [PATCH] regulator: mt6358: return error for get/set mode op on linear range LDO Chen-Yu Tsai 2023-09-19 12:26 ` Mark Brown 2023-09-19 12:26 ` Mark Brown
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