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Date: Wed, 29 Mar 2017 12:54:49 +0100 From: Mark Brown <broonie@...nel.org> To: Matthias Kaehlcke <mka@...omium.org> Cc: Javier Martinez Canillas <javier@....samsung.com>, Mark Brown <broonie@...nel.org>, Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, Javier Martinez Canillas <javier@....samsung.com>, linux-kernel@...r.kernel.org, Douglas Anderson <dianders@...omium.org>, Brian Norris <briannorris@...omium.org>, linux-kernel@...r.kernel.org Subject: Applied "regulator: core: Limit propagation of parent voltage count and list" to the regulator tree The patch regulator: core: Limit propagation of parent voltage count and list has been applied to the regulator tree at git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted. You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed. If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced. Please add any relevant lists and maintainers to the CCs when replying to this mail. Thanks, Mark >From fd086045559d90cd7854818b4c60a7119eda6231 Mon Sep 17 00:00:00 2001 From: Matthias Kaehlcke <mka@...omium.org> Date: Mon, 27 Mar 2017 16:54:12 -0700 Subject: [PATCH] regulator: core: Limit propagation of parent voltage count and list Commit 26988efe11b1 ("regulator: core: Allow to get voltage count and list from parent") introduces the propagation of the parent voltage count and list for regulators that don't provide this information themselves. The goal is to support simple switch regulators, however as a side effect normal continuous regulators can leak details of their supplies and provide consumers with inconsistent information. Limit the propagation of the voltage count and list to switch regulators. Fixes: 26988efe11b1 ("regulator: core: Allow to get voltage count and list from parent") Signed-off-by: Matthias Kaehlcke <mka@...omium.org> Reviewed-by: Javier Martinez Canillas <javier@....samsung.com> Tested-by: Javier Martinez Canillas <javier@....samsung.com> Signed-off-by: Mark Brown <broonie@...nel.org> --- drivers/regulator/core.c | 9 +++++++-- include/linux/regulator/driver.h | 2 ++ 2 files changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index c20b28a63d15..aff302dfab5d 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -2484,7 +2484,7 @@ static int _regulator_list_voltage(struct regulator *regulator, ret = ops->list_voltage(rdev, selector); if (lock) mutex_unlock(&rdev->mutex); - } else if (rdev->supply) { + } else if (rdev->is_switch && rdev->supply) { ret = _regulator_list_voltage(rdev->supply, selector, lock); } else { return -EINVAL; @@ -2542,7 +2542,7 @@ int regulator_count_voltages(struct regulator *regulator) if (rdev->desc->n_voltages) return rdev->desc->n_voltages; - if (!rdev->supply) + if (!rdev->is_switch || !rdev->supply) return -EINVAL; return regulator_count_voltages(rdev->supply); @@ -4097,6 +4097,11 @@ regulator_register(const struct regulator_desc *regulator_desc, mutex_unlock(®ulator_list_mutex); } + if (!rdev->desc->ops->get_voltage && + !rdev->desc->ops->list_voltage && + !rdev->desc->fixed_uV) + rdev->is_switch = true; + ret = device_register(&rdev->dev); if (ret != 0) { put_device(&rdev->dev); diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h index dac8e7b16bc6..4cb1c9be6073 100644 --- a/include/linux/regulator/driver.h +++ b/include/linux/regulator/driver.h @@ -429,6 +429,8 @@ struct regulator_dev { struct regulator_enable_gpio *ena_pin; unsigned int ena_gpio_state:1; + unsigned int is_switch:1; + /* time when this regulator was disabled last time */ unsigned long last_off_jiffy; }; -- 2.11.0
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