The ARM, PU, and SOC LDOs in the i.MX6 PMU can completely gate
their power output. Since power gating is configured by writing
zero to the voltage target bitfield,, store a copy of the
voltage selector to be restored when reenabling the regulator.
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: NMark Brown <broonie@linaro.org>

sreg is allocated via devm_kzalloc(), so there is no need to explicitly zero out
rdesc via memset().
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NMark Brown <broonie@linaro.org>

We can simply pass the regulator name via of_get_property() instead of making
a copy via kstrdup().

This leads to some code simplification.
Suggested-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NMark Brown <broonie@linaro.org>

Provide a MODULE_ALIAS() entry to the driver.
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NMark Brown <broonie@linaro.org>

Fix the following checkpatch warning.

  WARNING: quoted string split across lines
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Acked-by: NShawn Guo <shawn.guo@linaro.org>
Signed-off-by: NMark Brown <broonie@linaro.org>

devm_* simplifies the code.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Acked-by: NMarek Vasut <marex@denx.de>
Signed-off-by: NMark Brown <broonie@linaro.org>

For cpufreq example, it takes 13 steps (25 mV for one step) to increase
vddcore from 0.95 V to 1.275 V, and the time of 64 clock cycles at
24 MHz for one step is ~2.67 uS, so the total delay time would be
~34.71 uS.  But the current calculation in the driver gives 39 uS.
Change the formula to have the addition of 1 be the last step, so that
we can get a more precise delay time.  For example above, the new
formula will give 35 uS.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

some of anatop's regulators(cpu, vddpu and vddsoc) have
register settings about LDO's step time, which will impact
the LDO ramp up speed, need to use set_voltage_time_sel
interface to add necessary delay everytime LDOs' voltage
is increased.

offset 0x170:
bit [24-25]: cpu
bit [26-27]: vddpu
bit [28-29]: vddsoc

field definition:
0'b00: 64 cycles of 24M clock;
0'b01: 128 cycles of 24M clock;
0'b02: 256 cycles of 24M clock;
0'b03: 512 cycles of 24M clock;
Signed-off-by: NAnson Huang <b20788@freescale.com>
Acked-by: NShawn Guo <shawn.guo@linaro.org>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

CONFIG_HOTPLUG is going away as an option.  As a result, the __dev*
markings need to be removed.

This change removes the use of __devinit, __devexit_p, __devinitdata,
__devinitconst, and __devexit from these drivers.

Based on patches originally written by Bill Pemberton, but redone by me
in order to handle some of the coding style issues better, by hand.

Cc: Bill Pemberton <wfp5p@virginia.edu>
Cc: Liam Girdwood <lrg@ti.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Call regulator_[get|set]_voltage_sel_regmap instead of open code.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Reviewed-by: NYing-Chun Liu <paulliu@debian.org>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

By setting linear_min_sel to anatop_reg->min_bit_val, we can avoid
adjust the anatop_reg->min_bit_val offset in [set|get]_voltage_sel.

With this chance we can refactor this driver to use
regulator_[get|set]_voltage_sel_regmap.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Reviewed-by: NYing-Chun Liu <paulliu@debian.org>
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>

Using syscon to access anatop register.
Acked-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: NStephen Warren <swarren@wwwdotorg.org>
Signed-off-by: NDong Aisheng <dong.aisheng@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

The mask used in anatop_get_voltage_sel does not match the mask used in
anatop_set_voltage_sel.
We need to do left shift anatop_reg->vol_bit_shift bits for the correct mask.
Signed-off-by: NAxel Lin <axel.lin@gmail.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>

__devexit functions are discarded when CONFIG_HOTPLUG
is not set, so the symbol needs to be referenced carefully.
Signed-off-by: NAxel Lin <axel.lin@gmail.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>

 - rename to anatop_read_reg and anatop_write_reg
 - anatop_read_reg directly return reg value
 - anatop_write_reg write reg with mask
Signed-off-by: NRichard Zhao <richard.zhao@freescale.com>
Reviewed-by: NYing-Chun Liu (PaulLiu) <paul.liu@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

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

There is a name collision between 'struct platform_driver
anatop_regulator' and 'struct anatop_regulator', which causes some
section mismatch warnings like below.

WARNING: vmlinux.o(.data+0x154d4): Section mismatch in reference from the variable anatop_regulator to the function .devinit.text:anatop_regulator_probe()
The variable anatop_regulator references
the function __devinit anatop_regulator_probe()
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the variable:
*driver, *_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console

Rename 'struct platform_driver anatop_regulator' to
'struct platform_driver anatop_regulator_driver' to fix the warnings.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Cc: Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Change "reg" to "anatop-reg-offset" due to there is a warning of handling no
size field in reg.

This patch also adds the missing device-tree binding documentation.
Signed-off-by: NYing-Chun Liu (PaulLiu) <paul.liu@linaro.org>
Acked-by: NShawn Guo <shawn.guo@linaro.org>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Anatop is an integrated regulator inside i.MX6 SoC.
There are 3 digital regulators which controls PU, CORE (ARM), and SOC.
And 3 analog regulators which controls 1P1, 2P5, 3P0 (USB).
This patch adds the Anatop regulator driver.
Signed-off-by: NNancy Chen <Nancy.Chen@freescale.com>
Signed-off-by: NYing-Chun Liu (PaulLiu) <paul.liu@linaro.org>
Acked-by: NShawn Guo <shawn.guo@linaro.org>
Reviewed-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>