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Currently rdev is dereferenced when assigning desc before rdev is null
checked, hence there is a potential null pointer dereference on rdev.
Fix this by null checking rdev first.
Detected by CoverityScan, CID#1476031 ("Dereference before null check")
Fixes: 77e3e3b165 ("regulator: axp20x: add software based soft_start for AXP209 LDO3")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Initial commit of set_ramp_delay feature was missing an assignment which
should have populated slew_rate table for dcdc2 regulator. Add it.
Fixes: d29f54df8b ("regulator: axp20x: add support for set_ramp_delay for AXP209")
Signed-off-by: Priit Laes <plaes@plaes.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
In the past, there have been words on various lists that if LDO3 is
disabled in u-boot, but enabled in the DTS, the axp209 driver would
fail to continue/hang. Several enable/disable patches have been
issues to devicetree's in both the kernel and u-boot to address
this issue.
What really happened however, was that the AXP209 shuts down without
a notice and without setting an interrupt. This is caused when LDO3
gets overloaded, for example with large capacitors on the LDO3 output.
Normally, we would expect that AXP209 would source 200 mA as per
datasheet and set and trigger an interrupt when being overloaded.
For some reason however, this does not happen.
As a work-around, we use the soft-start constraint of the regulator
node to first bring up the LDO3 to the lowest possible voltage and
then enable the LDO. After that, we can set the requested voltage
as usual.
Combining this setting with the regulator-ramp-delay allows LDO3 to
enable voltage slowly and staggered, potentially reducing overall
inrush current.
Signed-off-by: Olliver Schinagl <oliver@schinagl.nl>
Signed-off-by: Priit Laes <plaes@plaes.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
The AXP209 supports ramping up voltages on several regulators such as
DCDC2 and LDO3.
This patch adds preliminary support for the regulator-ramp-delay property
for these 2 regulators. Note that the voltage ramp only works when
regulator is already enabled. E.g. when going from say 0.7 V to 3.6 V.
When turning on the regulator, no voltage ramp is performed in hardware.
What this means, is that if the bootloader brings up the voltage at 0.7 V,
the ramp delay property is properly applied. If however, the bootloader
leaves the power off, no ramp delay is applied when the power is
enabled by the regulator framework.
Signed-off-by: Olliver Schinagl <oliver@schinagl.nl>
Signed-off-by: Priit Laes <plaes@plaes.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
The AXP20X driver currently has several masks defined throughout the
code. Use nice defines to make them clean and more descriptive.
Additionally include bitops.h, which was missing before, and sort
headers.
Signed-off-by: Olliver Schinagl <oliver@schinagl.nl>
Signed-off-by: Priit Laes <plaes@plaes.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.
Notice that in this particular case, I moved the whole comment
"Fall through to the check below.", which contains the "Fall through"
comment, at the bottom of the case, which is what GCC is expecting
to find.
Addresses-Coverity-ID: 1436594 ("Missing break in switch")
Addresses-Coverity-ID: 1364475 ("Missing break in switch")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Like axp221, axp223, axp813 the axp803 is also supporting external
regulator to drive the OTG VBus through N_VBUSEN PMIC pin.
Add support for it.
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
The code to handle AXP803_ID and AXP813_ID cases are exactly the same.
Make the switch-case fall through to avoid duplicate code.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The AXP813 PMIC has 7 DC-DC buck regulators, 16 LDOs (including the
fixed RTC LDO and 2 GPIO LDOs), and 1 switchable. The drive-vbus
feature is also supported. All the hardware details are very similar
to the AXP803, with the following exceptions:
- Extra DCDC7 buck regulator, with the same range as DCDC6
- SWitch now has a separate supply pin, instead of being chained
internaly from DCDC1
- RTC LDO output voltage is now 1.8V
- FLDO3 is an LDO with switchable supplies, but unconfigurable output
voltage. The voltage is always half that of its supply.
Support for FLDO3 is currently unimplemented, as it requires runtime
switching of its supplies, something the regulator subsystem does not
support. It is not used in either the reference designs nor actually
produced boards available.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Tested-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The bit offset used to check if DCDC5 and DCDC6 are tied together in
poly-phase output is wrong. It was checking against a reserved bit,
which is always false.
In reality, neither the reference design layout nor actually produced
boards tie these two buck regulators together. But we should still
fix it, just in case.
Fixes: 1dbe0ccb06 ("regulator: axp20x-regulator: add support for AXP803")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Tested-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Check return value from call to devm_kzalloc()
in order to prevent a NULL pointer dereference.
This issue was detected using Coccinelle and the following semantic patch:
@@
expression x;
identifier fld;
@@
* x = devm_kzalloc(...);
... when != x == NULL
x->fld
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
AXP803 PMIC also have a series of regulators (DCDCs and LDOs)
controllable via I2C/RSB bus.
Add support for them.
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Declare regulator_ops structure as const as it is only stored in the ops
field of a regulator_desc structure. This field is of type const, so
regulator_ops structures having this property can be made const too.
File size before: drivers/regulator/axp20x-regulator.o
text data bss dec hex filename
16848 1232 0 18080 46a0 regulator/axp20x-regulator.o
File size after: drivers/regulator/axp20x-regulator.o
text data bss dec hex filename
17888 192 0 18080 46a0 regulator/axp20x-regulator.o
Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
A typo or copy-paste bug means that the register access intended for
regulator dcdce goes to dcdcb instead. This patch corrects it.
Fixes: 2ca342d391 (regulator: axp20x: Support AXP806 variant)
Signed-off-by: Rask Ingemann Lambertsen <rask@formelder.dk>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
The maximum supported voltage for ldo_io# is 3.3V, but on cold boot
the selector comes up at 0x1f, which maps to 3.8V. This was previously
corrected by Allwinner's U-boot, which set all regulators on the PMICs
to some pre-configured voltage. With recent progress in U-boot SPL
support, this is no longer the case. In any case we should handle
this quirk in the kernel driver as well.
This invalid setting causes _regulator_get_voltage() to fail with -EINVAL
which causes regulator registration to fail when constrains are used:
[ 1.054181] vcc-pg: failed to get the current voltage(-22)
[ 1.059670] axp20x-regulator axp20x-regulator.0: Failed to register ldo_io0
[ 1.069749] axp20x-regulator: probe of axp20x-regulator.0 failed with error -22
This commits makes the axp20x regulator driver accept the 0x1f register
value, fixing this.
The datasheet does not guarantee reliable operation above 3.3V, so on
boards where this regulator is used the regulator-max-microvolt setting
must be 3.3V or less.
This is essentially the same as the commit f40d4896bf ("regulator:
axp20x: Fix axp22x ldo_io registration error on cold boot") for AXP22x
PMICs.
Fixes: a51f9f4622 ("regulator: axp20x: support AXP809 variant")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
The X-Powers AXP806 PMIC has a new set of buck and LDO regulators, and
also a switch. The buck regulators support teaming into multi-phase
groups, with A+B, A+B+C, D+E groupings.
Some registers controlling DCDC converter work settings are at different
offsets. Deal with them as well.
Add support for this new variant.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
The axp20x pmics have 2 power inputs, one called ACIN which is intended
for to be supplied via a powerbarrel on the board and one called VBUS
which is intended to be supplied via an otg connector.
In the VBUS case the pmic needs to know if the board is supplying power
to the otg connector, because then it should not take any power from
its VBUS pin. The axp209 pmic has a N_VBUSEN input pin via which the
board can signal to the pmic whether the board is supplying power to the
otg connector or not.
On the axp221/axp223 this pin can alternatively be used as an output
which controls an external regulator which (optionally) supplies
power to the otg connector from the board. When the pin is used as
output it is called DRIVEVBUS in the datasheet.
This commit adds support for the DRIVEVBUS pin as an extra pmic
controlled regulator. Since this is optional a new x-powers,drivebus dt
property is added. When this is present the misc-control register is
written to change the N_VBUSEN input pin to DRIVEVBUS output pin mode and
the extra drivebus regulator is registered with the regulator subsystem.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
The X-Powers AXP809 PMIC has a similar set of regulators as the AXP221,
though a few LDOs were removed, and a new switch output added. Like the
AXP221, AXP809 also has DC1SW and DC5LDO, which are internally chained
to DCDC1 and DCDC5, respectively.
Add support for this new variant. Also remove the "axp22x_" prefix from
DC1SW/DC5LDO supply handling code, as the AXP809 uses it as well.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
The maximum supported voltage for ldo_io# is 3.3V, but on cold
boot the selector comes up at 0x1f, which maps to 3.8V.
This causes _regulator_get_voltage() to fail with -EINVAL which
causes regulator registration to fail when constrains are used:
[ 1.467788] vcc-touchscreen: failed to get the current voltage(-22)
[ 1.474209] axp20x-regulator axp20x-regulator: Failed to register ldo_io1
[ 1.483363] axp20x-regulator: probe of axp20x-regulator failed with error -22
This commits makes the axp20x regulator driver accept the 0x1f register
value, fixing this.
The datasheet does not guarantee reliable operation above 3.3V, so on
boards where this regulator is used the regulator-max-microvolt setting
must be 3.3V or less.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The minium voltage of 1800mV is a copy and paste error from the axp20x
regulator info. The correct minimum voltage for the ldo_io regulators
on the axp22x is 700mV.
Fixes: 1b82b4e4f9 ("regulator: axp20x: Add support for AXP22X regulators")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
The current linear voltage range for the LDO4 regulator found in the APX20X
PMICs assumes that the voltage is linear between 2.5 and 3.1V.
However, the PMIC can output up to 3.3V on that regulator by skipping the
2.6V and 2.9V steps.
Fix the ranges to read and set the proper voltages.
Fixes: 13d57e6435 ("regulator: axp20x: Use linear voltage ranges for AXP20X LDO4")
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
- Freescale Touch Screen ADC
- X-Powers AXP PMIC with RSB
- TI TPS65086 Power Management IC (PMIC)
- New Device Support
- Supply device PCI IDs for Intel Broxton
- Fix-ups
- Move to clkdev_create() API; intel_quark_i2c_gpio
- Complete re-write of TI's TPS65912 Power Management IC (PMIC)
- Remove unnecessary function argument; axp20x
- Separate out bus related code; axp20x
- Coding Style changes; axp20x
- Allow more drivers to be compiled as modules
- Work around false positive 'used uninitialised' warning; db8500-prcmu
- Bug Fixes
- Remove do_div(); fsl-imx25-gcq
- Fix driver init when built-in; tps65010
- Fix clock-unregister leak; intel-lpss
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Merge tag 'mfd-for-linus-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd
Pull MFD updates from Lee Jones:
"New Drivers:
- Freescale Touch Screen ADC
- X-Powers AXP PMIC with RSB
- TI TPS65086 Power Management IC (PMIC)
New Device Support:
- Supply device PCI IDs for Intel Broxton
Fix-ups:
- Move to clkdev_create() API; intel_quark_i2c_gpio
- Complete re-write of TI's TPS65912 Power Management IC (PMIC)
- Remove unnecessary function argument; axp20x
- Separate out bus related code; axp20x
- Coding Style changes; axp20x
- Allow more drivers to be compiled as modules
- Work around false positive 'used uninitialised' warning; db8500-prcmu
Bug Fixes:
- Remove do_div(); fsl-imx25-gcq
- Fix driver init when built-in; tps65010
- Fix clock-unregister leak; intel-lpss"
* tag 'mfd-for-linus-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (53 commits)
mfd: intel-lpss: Pass I2C configuration via properties on BXT
mfd: imx6sx: Add PCIe register definitions for iomuxc gpr
mfd: ipaq-micro: Use __maybe_unused to hide pm functions
mfd: max77686: Add max77802 to I2C device ID table
mfd: max77686: Export OF module alias information
mfd: max77686: Allow driver to be built as a module
mfd: stmpe: Add the proper PWM resources
mfd: tps65090: Set regmap config reg counts properly
mfd: syscon: Return ENOTSUPP instead of ENOSYS when disabled
mfd: as3711: Set regmap config reg counts properly
mfd: rc5t583: Set regmap config reg counts properly
gpio: tps65086: Add GPO driver for the TPS65086 PMIC
mfd: mt6397: Add platform device ID table
mfd: da9063: Fix missing volatile registers in the core regmap_range volatile lists
mfd: mt6397: Add MT6323 support to MT6397 driver
mfd: mt6397: Add support for different Slave types
mfd: mt6397: int_con and int_status may vary in location
dt-bindings: mfd: Add bindings for the MediaTek MT6323 PMIC
mfd: da9062: Fix missing volatile registers in the core regmap_range volatile lists
mfd: Add documentation for ACT8945A DT bindings
...
Originally the helper macros used uppercase regulator names, which
are primarily used to expand to the regulator ID enum, as the default
names. This is aestheticly unpleasent.
Since the of_match bits are the same, just lowercase, use that as the
default names instead.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
The AXP223 is a new PMIC commonly paired with Allwinner A23/A33 SoCs.
It is functionally identical to AXP221; only the regulator default
voltage/status and the external host interface are different.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
AXP20X datasheet lists the possible voltage settings for LDO4, so
it was implemented using a voltage table. Upon closer examination,
the valid voltages can be mapped into 3 linear ranges.
Move AXP20X LDO4 to use linear ranges. The supporting code can be
reused with later AXP8xx PMICs, which have a number of regulators
that have 2 linear ranges.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Switch-type regulators, such as DC1SW on AXP22X, are a secondary output
from DCDC1. They are just an on/off switch, and the driver should not
try to read its voltage directly from the DCDC1 control registers.
Instead, the core will pass down the voltage from the regulator supply
chain.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
The enable/disable values for GPIO LDOs are reversed. It seems no one
noticed as AXP22x support was introduced recently, and no one was using
the GPIO LDOs, either because no designs actually use them or board
support hasn't caught up.
Fixes: 1b82b4e4f9 ("regulator: axp20x: Add support for AXP22X regulators")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
The DC1SW and DC5LDO regulators in the AXP22X are internally chained
to DCDC1 and DCDC5, hence the names. The original bindings used the
parent regulator names for the supply regulator property.
Since they are internally connected, the relationship should not be
represented in the device tree, but handled internally by the driver.
This patch has the driver remember the regulator names for the parent
DCDC1/DCDC5, and use them as supply names for DC1SW/DC5LDO.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
The enable bit indexes for DCDC4 and DCDC5 regulators are off by 1.
We haven't run into any problems with this since either the regulators
aren't defined in the DT and aren't used, or all the DCDC regulators
have the "always-on" property set, as they are almost always used
for system critical loads.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
This allows the module to be autoloaded.
Together with 07949bf9c6 ("cpufreq: dt: allow driver to boot
automatically") this is sufficient to allow a modular kernel (such
as Debian's) to enable cpufreq on a Cubietruck.
Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Signed-off-by: Mark Brown <broonie@kernel.org>
Add AXP22X regulator definitions and variant id associations.
This introduces a new "switch" type output for one of the regulators.
It is a switchable secondary output of one regulator, with the same
voltage level as the primary output.
Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
[wens@csie.org: Moved variant choosing to multi family support patch]
[wens@csie.org: Add dc-dc work frequency range]
[wens@csie.org: Add "switch" type output regulator DC1SW]
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Rework the AXP20X_ macros and probe function to support the several chip
families, so that each family can define it's own set of regulators.
Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
[wens@csie.org: Support different DC-DC work frequency ranges]
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
A common simplified DT parsing code for regulators was introduced in
commit a0c7b164ad ("regulator: of: Provide simplified DT parsing
method"). This is very similar to our own code, so get rid of ours
and use the common code.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
This patch fills the DT related fields in the regulator descriptors,
which can then be used by the regulator core's simplified DT code.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
The current device used for the regulator configuration is the child device
created by the MFD driver. This means that it doesn't have any of_node pointing
to it, and whenever we register the regulators, it will not look into the
regulator supply in the DT, hence requiring to provide regulator aliases in the
MFD driver.
We can easily fix that by using the parent device in our configuration, which
has a DT node associated to it, and will allow a DT lookup. Eventually, we will
be able to remove the aliases in the MFD driver.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The voltages in axp20x_ldo4_data table are in ascendant order, so use
regulator_map_voltage_ascend.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
The of_find_node_by_name function will search for a DT node named
"regulators" after the provided np node, but will not ensure that this node
is a child of np.
This might result in retrieving a "regulators" node that is not related to
the axp20x PMIC.
Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
Acked-by: Carlo Caione <carlo@caione.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
AXP202 and AXP209 come with two synchronous step-down DC-DCs and five
LDOs. This patch introduces basic support for those regulators.
Signed-off-by: Carlo Caione <carlo@caione.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
