This patch enables registering the regulator driver even though
 the regulator_init_data is not defined in the platform side.

Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

Signed-off-by: Gaëtan Carlier <gcembed@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

This driver can be built as a module, add MODULE_ALIAS for it.

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

If a regulator is not used by a board, it's quite legitimate not to
provide platform data or a device tree node to configure it (i.e.
regulator_init_data). In that case, during MAX8907 regulator's
probe(), the idata variable will be NULL for that regulator. Prevent
dereferincing it.

If the MBATT regulator's init_data is not specified, or no name was
specified in the constraints, the regulator will be named based on
the regulator descriptor, so initialize mbatt_rail_name from there.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

Fix regulator kernel-doc warnings:

Warning(drivers/regulator/core.c:2308): No description found for parameter 'rdev'
Warning(drivers/regulator/core.c:2308): Excess function parameter 'regulator' description in 'regulator_set_voltage_time_sel'

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Cc:	Liam Girdwood <lrg@ti.com>
Cc:	Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

This encodes the voltage shifts (the number of bits to shift
the register to get to the selector) into the regulator info.
We have several new variants of the AB8500 so this varies a
lot.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

Fix the following:

  CC [M]  drivers/regulator/max8907-regulator.o
drivers/regulator/max8907-regulator.c: In function 'max8907_regulator_probe':
drivers/regulator/max8907-regulator.c:297:12: error: 'max8907_matches' undeclared (first use in this function)

by removing direct references to max8907_matches[], which only exists when
CONFIG_OF is defined.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

Add missing platform_get_drvdata() call in max8907_regulator_remove(), this
fixes below build warning:

  CC [M]  drivers/regulator/max8907-regulator.o
drivers/regulator/max8907-regulator.c: In function 'max8907_regulator_remove':
drivers/regulator/max8907-regulator.c:353:23: warning: 'pmic' is used uninitialized in this function [-Wuninitialized]

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

For linear voltage mapping, the n_voltages is (max - min) / step + 1

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

Fixes this build error:

drivers/regulator/twl-regulator.c: In function 'twlreg_probe':
drivers/regulator/twl-regulator.c:1229:3: error: implicit declaration of function 'kfree' [-Werror=implicit-function-declaration]

Also added string.h for kmemdup().

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

The MAX8907 is an I2C-based power-management IC containing voltage
regulators, a reset controller, a real-time clock, and a touch-screen
controller.

The original driver was written by:
* Gyungoh Yoo <jack.yoo@maxim-ic.com>

Various fixes and enhancements by:
* Jin Park <jinyoungp@nvidia.com>
* Tom Cherry <tcherry@nvidia.com>
* Prashant Gaikwad <pgaikwad@nvidia.com>
* Dan Willemsen <dwillemsen@nvidia.com>
* Laxman Dewangan <ldewangan@nvidia.com>

During upstreaming, I (swarren):
* Converted to regmap.
* Allowed probing from device tree.
* Reworked the regulator driver to be represented as a single device that
  provides multiple regulators, rather than as a device per regulator.
* Replaced many regulator ops with standard functions.
* Added ability to specify supplies for each regulator.
* Removed the WLED regulator. If/when we expose this in the driver, it
  should be a backlight object not a regulator object.
* Renamed from max8907c->max8907, since the driver covers at least the
  C and B revisions.
* General cleanup.

Signed-off-by: Gyungoh Yoo <jack.yoo@maxim-ic.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

I currently carry the series to make of_device_id->data const in the
arm-soc tree, which fixes a number of issues, but leaves one new
compiler warning about the twl-regulator driver:

drivers/regulator/twl-regulator.c: In function 'twlreg_probe':
drivers/regulator/twl-regulator.c:1130:8: warning: assignment discards 'const'
qualifier from pointer target type [enabled by default]
drivers/regulator/twl-regulator.c:1139:9: warning: assignment discards 'const'
qualifier from pointer target type [enabled by default]

The warning indicates that the driver takes a static table with
initialization data for each regulator, modifies the data in place
and passes a pointer to that structure to the regulator_register
function. This is probably ok because a system contains only one
instance of each regulator, but it's still bad style because any
driver should be written to support multiple instances of the same
hardware.

This patch changes the code to dynamically allocate the memory
we pass to the regulator core so the table can be constant.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

This is not required after commit f7df20ec


"regulator: core: Use list_voltage() to read single voltage regulators"

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

This is not required after commit f7df20ec


"regulator: core: Use list_voltage() to read single voltage regulators"

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

This is not required after commit f7df20ec


"regulator: core: Use list_voltage() to read single voltage regulators"

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

This is not required after commit f7df20ec


"regulator: core: Use list_voltage() to read single voltage regulators"

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

This is not required after commit f7df20ec


"regulator: core: Use list_voltage() to read single voltage regulators"

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

The regulators should be tending to the maximum in the available range and
consumers should specify the widest range possible.

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

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

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

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

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

Initialize config.of_node for regulator before registering.
This is needed for DT based regulator support.

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

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

To set REGULATOR_MODE_IDLE mode, what we do is to clear DC1_ACTIVE and
DC1_SLEEP bits, this can be done in one wm8400_set_bits() call.

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

wm831x_reg_read() returns negative error code on failure.
This prevents using the error code as the value read.

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

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

Below is the buck_pmap mapping table:

BUCK1:  mask = 1 << 0,  shift = 0
BUCK2:  mask = 1 << 1,  shift = 1
BUCK3:  mask = 1 << 2,  shift = 2
BUCK4:  mask = 1 << 3,  shift = 3

The mask and shift can be easily calculated by:
        mask = 1 << BUCK_ID
        shift = BUCK_ID

This patch defines BUCK_FPWM_MASK and BUCK_FPWM_SHIFT macros to replace
buck_pmap mapping table.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Tested-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

We already know the mask in lp8788_init_dvs() function, and we can update
the corresponding bit for default_dvs_mode in lp8788_init_dvs() function.
This function looks not necessary to me.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Tested-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

For fixed voltage, the n_voltages should be 1 rather than 0.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

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

Use mc13xxx_reg_rmw rather than a mc13xxx_reg_read and a mc13xxx_reg_write calls.

This logic to set MC13892_SWITCHERS0_SWxHI bit is pretty simple:

if (volt > 1375000)
        set MC13892_SWITCHERS0_SWxHI bit
else if (volt < 1100000)
        clear MC13892_SWITCHERS0_SWxHI bit
else
        leave MC13892_SWITCHERS0_SWxHI bit untouched

We already know the selector, so we don't need to calculate the selector again.

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

Then we can remove lock/unlock around the caller.

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

Then we can remove lock/unlock around the caller.

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

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

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

The voltage selection logic is supposed to find the samllest voltage falls
within specified range. When using equation to calculate vsel, we need to
ensure the requested min_uV meet the range of using the equation.
Otherwise we may select a voltage that is out of specified range.

For example, in the case vsel = 62 means select voltage of 2100000uV.
What we want is to ensure the requested min_uV <= 2100000 rather than checking
max_uV >= 2100000. And this also means in the case min_uV > 2100000, vsel = 62
does not meet the request.

Also calling twl6030smps_list_voltage() for all cases to ensure the selected
voltage still in bounds.

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

This was missing until now and the underlying
_regulator_do_set_voltage is using this value when calling list_voltage.

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

The number of regulator is known at compile time, use array to save pointer to
rdev makes the code simpler.

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