The enable time for buck regulators was not configured but actually is
essential: consumers, like usb3503, doing hard reset (regulator off/on)
should wait for the regulator to settle.

Configure the enable time according to datasheet.
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

The driver's init and exit function don't do anything besides registering
and unregistering the platform driver, so the module_platform_driver()
macro could just be used instead of having separate functions.

Currently the macro is not being used because the driver is initialized at
subsys init call level but this isn't necessary since consumer devices are
defined in the DT as dependencies so there's no need for init calls order.
Signed-off-by: NJavier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

The max77686 and max77802 regulator drivers are for sub-devices of a MFD
driver for some PMIC blocks. But the same object file name (max77686.o)
was used for both the common MFD driver and the max77686 regulator one.

This confuses kbuild if both drivers are built as module causing the MFD
driver to not be copied when installing the modules.

Also, max77{686,802} are a quite generic name for MFD subdevices drivers
so it is better to rename them to max77{686,802}-regulator like it's the
case for most regulator drivers.
Signed-off-by: NJavier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

The code should handle more than 32 bits here because "id"
can be a value up to MAX77686_REGULATORS (currently 34).

Convert the gpio_enabled type to DECLARE_BITMAP and use
test_bit/set_bit.

Fixes: 3307e902 ("regulator: max77686: Add GPIO control")
Reported-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NJoe Perches <joe@perches.com>
Reviewed-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NMark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org

Fix typo in the samsung email address.
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

Add enable control over GPIO for regulators supporting this: LDO20,
LDO21, LDO22, buck8 and buck9.

This is needed for proper (and full) configuration of the Maxim 77686
PMIC without creating redundant 'regulator-fixed' entries.
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

The driver is used only on Exynos based boards with DTS support.
Simplify the driver and remove dead (unused) entries in platform_data
structure.

Convert the driver to DTS-only version. Parse all regulators at once,
not one-by-one. Remove dependency on data provided by max77686 MFD
driver. Use new DT style parsing method for regulators init data.
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

Minor nit: Initialize the opmode for each regulator to normal mode in a
readable explicit way.
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Suggested-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Reviewed-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: NMark Brown <broonie@kernel.org>

Mixed indexes were used for array of opmodes in max77686_data structure:
id of regulator and index of regulator_desc array.

These indexes are exactly the same but the mixture may confuse. Use
consistently the id of regulator.
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

The struct of_regulator_match is declared as a non-static local variable
so the structure members are not auto-initialized.

Initialize the struct at declaration time to avoid the structure members
values to be indeterminate and have sane defaults instead.
Signed-off-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: NMark Brown <broonie@kernel.org>

Some LDOs of Maxim 77686 PMIC support disabling during system suspend
(LDO{2,6,7,8,10,11,12,14,15,16}). This was already implemented as part
of set_suspend_mode function. In that case the mode was one of:
 - disable,
 - normal mode,
 - low power mode.
However there are no bindings for setting the mode during suspend.

Add suspend disable for LDO regulators supporting this. Re-use existing
max77686_buck_set_suspend_disable() function. This helps reducing
energy consumption during system sleep.
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: NMark Brown <broonie@kernel.org>

Introduce simple helper for calculating the shift for OPMODE field in
registers. This allows storing the current value of opmode in
non-shifted form and simplifies a little set_suspend_disable and enable
functions. Additionally this will allow adding support LDOs to the
existing set_suspend_disable function.
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Suggested-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Reviewed-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: NMark Brown <broonie@kernel.org>

Add defines for regulator operating modes which should be more readable,
especially if one does not have Maxim 77686 datasheet.

The patch does not introduce any functional change.
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Suggested-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: NMark Brown <broonie@kernel.org>

The regulator_register() expects array of 'regulator_desc' to be const.
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: NMark Brown <broonie@kernel.org>

A platform_driver does not need to set an owner, it will be populated by the
driver core.
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Don't store array of regulator_dev returned by devm_regulator_register()
in state container. It isn't used anywhere outside of
max77686_pmic_probe() function.
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NMark Brown <broonie@linaro.org>

kzalloc prints its own OOM message upon failure.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: NMark Brown <broonie@linaro.org>

Add of_node_put to decrement the ref count.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: NMark Brown <broonie@linaro.org>

of_find_node_by_name walks the allnodes list, and can thus walk
outside of the parent node. Use of_get_child_by_name instead.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: NMark Brown <broonie@linaro.org>

NULL assignment corrupts the error pointer and is not
necessary.
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: NMark Brown <broonie@linaro.org>

devm_* simplifies the code.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: NMark Brown <broonie@linaro.org>

All the drivers that need delay for the regulator voltage output voltage to
stabilize after being enabled or after being set to a new value has been
converted to implement enable_time and set_voltage_time_sel callbacks.
Then regulator core will take care of the necessary delay.

This patch removes the unneeded include of linux/delay.h in regulator drivers.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Cc: Daniel Jeong <daniel.jeong@ti.com>
Cc: Sangbeom Kim <sbkim73@samsung.com>
Cc: Chiwoong Byun <woong.byun@samsung.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Ensure max77686->opmode always has correct status.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Signed-off-by: NMark Brown <broonie@sirena.org.uk>

Signed-off-by: NThiago Farina <tfarina@chromium.org>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Use &pdev->dev rather than iodev->dev for dev_err().
Use &pdev->dev rather than iodev->dev for devm_kzalloc() and
of_regulator_match(), this fixes memory leak.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

CONFIG_HOTPLUG is going away as an option so __devexit is no
longer needed.
Signed-off-by: NBill Pemberton <wfp5p@virginia.edu>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

CONFIG_HOTPLUG is going away as an option so __devinit is no longer
needed.
Signed-off-by: NBill Pemberton <wfp5p@virginia.edu>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

CONFIG_HOTPLUG is going away as an option so __devexit_p is no longer
needed.
Signed-off-by: NBill Pemberton <wfp5p@virginia.edu>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

This patch fixes a sparse warning. Since max77686_enable() is a callback,so it
should be static.
Signed-off-by: NYadwinder Singh Brar <yadi.brar@samsung.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

This patch implements set_suspend_disable callback for BUCKs which
support only switch ON/OFF modes during system suspend state, and
set_suspend_mode callbacks for LDOs which also suport Low power mode and
switch ON/OFF modes.
Signed-off-by: NYadwinder Singh Brar <yadi.brar@samsung.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

This patch adds basic support to take care of opmode(if any) which can be set by
set_suspend_[disable/mode] callbacks.
Signed-off-by: NYadwinder Singh Brar <yadi.brar@samsung.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

MAX77686_REGULATORS is known in compile time.
Use array to save pointer to rdev makes the code simpler.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Initialize config.of_node for regulator before registering.
This is needed for DT based regulator support.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Now of_regulator_match() returns without finding the match if match->of_node
is not NULL.
Signed-off-by: NYadwinder Singh Brar <yadi.brar@samsung.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

This patch device tree support for regulator driver. It uses the parent
(mfd's) DT node to parse the regulator data for max77686.
Signed-off-by: NYadwinder Singh Brar <yadi.brar@samsung.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

This patch implements the .set_ramp_delay callback to set the ramp_delay on
hardware for BUCK2/3/4 if ramp_delay is set in regulator constraints.

This patch also do some cleaning work for unrequired members of
struct max77686_data.
Signed-off-by: NYadwinder Singh Brar <yadi.brar@samsung.com>
Acked-by: NMyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

This patch converts the driver to use regulator_set_voltage_time_sel() as
.set_voltage_time_sel() callback. It also sets ramp_delay as 100000 uV/us for
LDOs & normal BUCKs and 27500 uV/us(default/reset value) for BUCKs[2/3/4] in
regulator_desc[].
Signed-off-by: NYadwinder Singh Brar <yadi.brar@samsung.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

rdev->desc->uV_step * abs(new_selector - old_selector) returns uV.
The unit of ramp_rate is mV/us.
Thus 1000 should be multiplied.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Reviewed-by: NYadwinder Singh Brar <yadi.brar@samsung.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

If this driver only works when pdata->num_regulators == MAX77686_REGULATORS,
let's check it earlier.

Also remove unused num_regulators from struct max77686_data.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>