PFUZE100_SWB_REG is not proper for sw1a/sw2, because enable_mask/enable_reg
is not correct. On PFUZE3000, sw1a/sw2 should be the same as sw1a/sw2 on
pfuze100 except that voltages are not linear, so add new PFUZE3000_SW_REG
and pfuze3000_sw_regulator_ops which like the non-linear PFUZE100_SW_REG
and pfuze100_sw_regulator_ops.
Fixes: 1dced996ee ("regulator: pfuze100: update voltage setting for pfuze3000 sw1a")
Reported-by: Christophe Meynard <Christophe.Meynard@ign.fr>
Signed-off-by: Robin Gong <yibin.gong@nxp.com>
Link: https://lore.kernel.org/r/1592171648-8752-1-git-send-email-yibin.gong@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Pickable ranges mapping function never used range min selector. Thus
existing drivers broke when proper linear_ranges functionality was taken
in use. Fix this for now just by ignoring the minimum selector.
Fixes: 60ab7f4153 ("regulator: use linear_ranges helper")
Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Link: https://lore.kernel.org/r/20200612090225.GA3243@localhost.localdomain
Signed-off-by: Mark Brown <broonie@kernel.org>
Commit 99f75ce666 ("regulator: da9063: fix suspend") converted
the regulators to use a common (corrected) suspend bit setting but
one of regulators (LDO9) slipped through the crack.
This means that the original problem was not fixed for LDO9 and
also leads to a warning found by the test robot.
da9063-regulator.c:515:3: warning: initialized field overwritten
Fix this by converting that regulator too like the others.
Fixes: 99f75ce666 ("regulator: da9063: fix suspend")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Martin Fuzzey <martin.fuzzey@flowbird.group>
Link: https://lore.kernel.org/r/1591959073-16792-1-git-send-email-martin.fuzzey@flowbird.group
Signed-off-by: Mark Brown <broonie@kernel.org>
Add new trace points for the start and end of enabling bypass on a
regulator, to allow monitoring of when regulators are moved into bypass
and how long that takes.
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20200529152216.9671-1-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Hi!
This patchset is another attempt to fix the regulator coupling on
Exynos5800/5422 SoCs. Here are links to the previous attempts:
https://lore.kernel.org/linux-samsung-soc/20191008101709.qVNy8eijBi0LynOteWFMnTg4GUwKG599n6OyYoX1Abs@z/https://lore.kernel.org/lkml/20191017102758.8104-1-m.szyprowski@samsung.com/https://lore.kernel.org/linux-pm/cover.1589528491.git.viresh.kumar@linaro.org/https://lore.kernel.org/linux-pm/20200528131130.17984-1-m.szyprowski@samsung.com/
The problem is with "vdd_int" regulator coupled with "vdd_arm" on Odroid
XU3/XU4 boards family. "vdd_arm" is handled by CPUfreq. "vdd_int" is
handled by devfreq. CPUfreq initialized quite early during boot and it
starts changing OPPs and "vdd_arm" value. Sometimes CPU activity during
boot goes down and some low-frequency OPPs are selected, what in turn
causes lowering "vdd_arm". This happens before devfreq applies its
requirements on "vdd_int". Regulator balancing code reduces "vdd_arm"
voltage value, what in turn causes lowering "vdd_int" value to the lowest
possible value. This is much below the operation point of the wcore bus,
which still runs at the highest frequency.
The issue was hard to notice because in the most cases the board managed
to boot properly, even when the regulator was set to lowest value allowed
by the regulator constraints. However, it caused some random issues,
which can be observed as "Unhandled prefetch abort" or low USB stability.
Adding more and more special cases to the generic code has been rejected,
so the only way to ensure the desired behavior on Exynos5800-based SoCs
is to make a custom regulator coupler driver.
Best regards,
Marek Szyprowski
Patch summary:
Marek Szyprowski (2):
regulator: extract voltage balancing code to separate function
soc: samsung: Add simple voltage coupler for Exynos5800
arch/arm/mach-exynos/Kconfig | 1 +
drivers/regulator/core.c | 49 ++++++++-------
drivers/soc/samsung/Kconfig | 3 +
drivers/soc/samsung/Makefile | 1 +
.../soc/samsung/exynos-regulator-coupler.c | 59 +++++++++++++++++++
include/linux/regulator/coupler.h | 8 +++
6 files changed, 101 insertions(+), 20 deletions(-)
create mode 100644 drivers/soc/samsung/exynos-regulator-coupler.c
--
2.17.1
base-commit: 8f3d9f3542
Move the coupled regulators voltage balancing code to the separate
function and allow to call it from the custom regulator couplers.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/20200529124940.10675-2-m.szyprowski@samsung.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The max8998 has a current regulator for charging control. The
charger driver in drivers/power/supply/max8998_charger.c has a
comment in it stating that 'charger control is done by a current
regulator "CHARGER"', but this regulator was never added until
now.
The current values have been extracted from a downstream driver
for the SGH-T959V.
Signed-off-by: Jonathan Bakker <xc-racer2@live.ca>
Link: https://lore.kernel.org/r/BN6PR04MB0660E1F4A3D5A348BE88311CA3BA0@BN6PR04MB0660.namprd04.prod.outlook.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Add maintainer entries to a few ROHM devices and Linear Ranges
Linear Ranges helpers were refactored out of regulator core to lib so
that other drivers could utilize them too. (I guess power/supply drivers
and possibly clk drivers can benefit from them). As regulators is
currently the main user it makes sense the changes to linear_ranges go
through Mark's tree.
During past two years few ROHM PMIC drivers have been added to
mainstream. They deserve a supporter from ROHM side too :)
Patch 1:
Maintainer entries for few ROHM IC drivers
Patch 2:
Maintainer entry for linear ranges helpers
---
Matti Vaittinen (2):
MAINTAINERS: Add entry for ROHM power management ICs
MAINTAINERS: Add maintainer entry for linear ranges helper
MAINTAINERS | 37 +++++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)
base-commit: b9bbe6ed63
--
2.21.0
--
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND
~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =]
The BD71837 had a HW "feature" where changing the regulator output
voltages of other regulators but bucks 1-4 might cause spikes if
regulators were enabled. Thus SW prohibit voltage changes for other
regulators except for bucks 1-4 when regulator is enabled.
The HW colleagues did inadvertly fix this issue for BD71847 and
BD71850.
The power-good detection for LDOs can still cause false alarms if
LDO voltage is changed upwards when LDO is enabled.
Allow LDO voltage changes and disabe the power-good monioring for
the duration of the LDO voltage change and enable it after LDO
voltage has stabilized. ROHM HW colleagues measured the safety
limit of 1000uS for guaranteeing the voltage has stabilized. Let's
use that for starters and add confiurable stabilization wait-time
later if needed.
Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Link: https://lore.kernel.org/r/20200513143921.GA22143@localhost.localdomain
Signed-off-by: Mark Brown <broonie@kernel.org>
Series extracts a "linear ranges" helper out of the regulator
framework. Linear ranges helper is intended to help converting
real-world values to register values when conversion is linear. I
suspect this is useful also for power subsystem and possibly for clk.
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Merge tag 'linear-ranges-lib' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator into regulator-5.8
lib: Add linear ranges helper library and start using it
Series extracts a "linear ranges" helper out of the regulator
framework. Linear ranges helper is intended to help converting
real-world values to register values when conversion is linear. I
suspect this is useful also for power subsystem and possibly for clk.
Change the regulator helpers to use common linear_ranges code.
Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Acked-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Link: https://lore.kernel.org/r/64f01d5e381b8631a271616b7790f9d5640974fb.1588944082.git.matti.vaittinen@fi.rohmeurope.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Fix the following coccicheck warning:
drivers/regulator/db8500-prcmu.c:184:1-17: WARNING: Assignment of 0/1 to
bool variable
Signed-off-by: Jason Yan <yanaijie@huawei.com>
Link: https://lore.kernel.org/r/20200506061726.19289-1-yanaijie@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This reverts commit dca0b44957 ("regulator: Use
driver_deferred_probe_timeout for regulator_init_complete_work"),
as we ended up reverting the default deferred_probe_timeout
value back to zero, to preserve behavior with 5.6 we need to
decouple the regulator timeout which was previously 30 seconds.
This avoids breaking some systems that depend on the regulator
timeout but don't require the deferred probe timeout.
Cc: linux-pm@vger.kernel.org
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Thierry Reding <treding@nvidia.com>
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Saravana Kannan <saravanak@google.com>
Cc: Todd Kjos <tkjos@google.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Kevin Hilman <khilman@kernel.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Rob Herring <robh@kernel.org>
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Suggested-by: Mark Brown <broonie@kernel.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20200429172349.55979-1-john.stultz@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The BD71837 had a HW "feature" where changing the regulator output
voltages of other regulators but bucks 1-4 might cause spikes if
regulators were enabled. Thus SW prohibit voltage changes for other
regulators except for bucks 1-4 when regulator is enabled.
The HW colleagues did inadvertly fix this issue for BD71847 and
BD71850. Remove voltage change restrictions from other PMICs but
BD71837.
The LDO voltage changing is still restricted. I did not yet receive
answer whether there is voltage spikes to be expected for LDOs. I
only know that the power-good detection for LDOs can cause false
alarms if LDO voltage is changed when LDO is enabled. We might be
able to work-around this by disabling the power-good monioring for
the duration of the LDO voltage change - but as I said, I don't
know yet. Let's fix it later if we can confirm that also LDO voltage
changes are safe.
Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Link: https://lore.kernel.org/r/20200428092930.GA9721@localhost.localdomain
Signed-off-by: Mark Brown <broonie@kernel.org>
Adding regulator driver for the Maxim max77826 device.
The max77826 PMIC contains a high-efficiency BUCK regulator, a BUCK
BOOST regulator and 15 LDOs. It is designed for smartphone and tablet
applications and is accessed over I2C.
Signed-off-by: Iskren Chernev <iskren.chernev@gmail.com>
Link: https://lore.kernel.org/r/20200414172250.2363235-2-iskren.chernev@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The variables ret and val are being initialized with values that are
never read and are being updated later with a new value. The
initializations are redundant and can be removed.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Addresses-Coverity: ("Unused value")
Link: https://lore.kernel.org/r/20200410133406.24458-1-colin.king@canonical.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Fix the following gcc warning:
drivers/regulator/ab8500.c:195:27: warning: ‘ldo_vdmic_voltages’ defined
but not used [-Wunused-const-variable=]
static const unsigned int ldo_vdmic_voltages[] = {
^~~~~~~~~~~~~~~~~~
drivers/regulator/ab8500.c:169:27: warning: ‘fixed_3300000_voltage’
defined but not used [-Wunused-const-variable=]
static const unsigned int fixed_3300000_voltage[] = {
^~~~~~~~~~~~~~~~~~~~~
drivers/regulator/ab8500.c:142:27: warning: ‘ldo_sdio_voltages’ defined
but not used [-Wunused-const-variable=]
static const unsigned int ldo_sdio_voltages[] = {
^~~~~~~~~~~~~~~~~
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Jason Yan <yanaijie@huawei.com>
Link: https://lore.kernel.org/r/20200410073343.39031-1-yanaijie@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Make it easier to identify regulator consumers when consumer device
uses more than one supply.
Before:
regulator ena use open bypass voltage current min max
-----------------------------------------------------------------------------------
regulator-dummy 1 0 2 0 0mV 0mA 0mV 0mV
1-0010 0mV 0mV
1-0010 0mV 0mV
After:
regulator ena use open bypass voltage current min max
-----------------------------------------------------------------------------------
regulator-dummy 1 0 2 0 0mV 0mA 0mV 0mV
1-0010-vccio 0mV 0mV
1-0010-vcc33 0mV 0mV
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Link: https://lore.kernel.org/r/731a4b299c6ae0ee9d8995157600a3477f21a36c.1585959068.git.mirq-linux@rere.qmqm.pl
Signed-off-by: Mark Brown <broonie@kernel.org>
Fix the following gcc warning:
drivers/regulator/qcom_rpm-regulator.c:607:34: warning: ‘pm8921_ftsmps’
defined but not used [-Wunused-const-variable=]
static const struct qcom_rpm_reg pm8921_ftsmps = {
^~~~~~~~~~~~~
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Jason Yan <yanaijie@huawei.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20200409114026.38383-1-yanaijie@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
At one point in the release cycle I managed to fat finger things and
apply some SPI fixes onto a regulator branch and merge that into the SPI
tree, then pull in a change shared with the MTD tree moving the Mediatek
quadspi driver over to become the Mediatek spi-nor driver in the SPI
tree. This has made a mess which I only just noticed while preparing
this and I can't see a sensible way to unpick things due to other
subsequent merge commits especially the pull from MTD so it looks like
the most sensible thing to do is give up and combine the two pull
requests - I hope this is OK. Sorry about this, I've changed some bits
of workflow which should hopefully help me spot such issues earlier in
future.
Fortunately both subsystems were fairly quiet this cycle, the highlights
are:
regulator:
- Support for Monoloithic Power Systems MP5416, MP8867 and MPS8869 and
Qualcomm PMI8994 and SMB208.
SPI:
- Lots of enhancements for spi-fsl-dspi, including XSPI mode support,
from Vladimir Oltean.
- Support for amlogic Meson G12A, IBM FSI, Mediatek spi-nor (moved from
MTD), NXP i.MX8Mx, Rockchip PX30, RK3308 and RK3328, and Qualcomm
Atheros AR934x/QCA95xx.
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Merge tag 'regulator-spi-v5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc
Pull spi and regulator updates from Mark Brown:
"At one point in the release cycle I managed to fat finger things and
apply some SPI fixes onto a regulator branch and merge that into the
SPI tree, then pull in a change shared with the MTD tree moving the
Mediatek quadspi driver over to become the Mediatek spi-nor driver in
the SPI tree.
This has made a mess which I only just noticed while preparing this
and I can't see a sensible way to unpick things due to other
subsequent merge commits especially the pull from MTD so it looks like
the most sensible thing to do is give up and combine the two pull
requests.
Fortunately both subsystems were fairly quiet this cycle, the
highlights are:
regulator:
- Support for Monoloithic Power Systems MP5416, MP8867 and MPS8869
and Qualcomm PMI8994 and SMB208.
SPI:
- Lots of enhancements for spi-fsl-dspi, including XSPI mode support,
from Vladimir Oltean.
- Support for amlogic Meson G12A, IBM FSI, Mediatek spi-nor (moved
from MTD), NXP i.MX8Mx, Rockchip PX30, RK3308 and RK3328, and
Qualcomm Atheros AR934x/QCA95xx"
* tag 'regulator-spi-v5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc: (118 commits)
spi: efm32: Convert to use GPIO descriptors
regulator: qcom_smd: Add pmi8994 regulator support
regulator: da9063: Fix get_mode() functions to read sleep field
spi: spi-fsl-lpspi: Replace zero-length array with flexible-array member
spi: spi-s3c24xx: Replace zero-length array with flexible-array member
spi: stm32: Fix comments compilation warnings
spi: atmel-quadspi: Add verbose debug facilities to monitor register accesses
spi: spi-fsl-dspi: Add support for LS1028A
spi: spi-fsl-dspi: Move invariant configs out of dspi_transfer_one_message
spi: spi-fsl-dspi: Fix interrupt-less DMA mode taking an XSPI code path
spi: spi-fsl-dspi: Avoid NULL pointer in dspi_slave_abort for non-DMA mode
spi: spi-fsl-dspi: Replace interruptible wait queue with a simple completion
spi: spi-fsl-dspi: Protect against races on dspi->words_in_flight
spi: spi-fsl-dspi: Avoid reading more data than written in EOQ mode
spi: spi-fsl-dspi: Fix bits-per-word acceleration in DMA mode
spi: spi-fsl-dspi: Fix little endian access to PUSHR CMD and TXDATA
spi: spi-fsl-dspi: Don't access reserved fields in SPI_MCR
regulator: driver.h: fix regulator_map_* function names
regulator: da9063: fix suspend
spi: mxs: Drop GPIO includes
...
The pmi8994 is commonly found on MSM8996 based devices, such as the
Dragonboard 820c, where it supplies power to a number of LDOs on the
primary PMIC.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20200324041424.518160-1-bjorn.andersson@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
get_mode() is used to retrieve the active mode state. Settings-A
config is used during active state, whilst Settings-B is for
suspend. This means we only need to check the sleep field of each
buck and LDO as that field solely relates to Settings-A config.
This change is a clone of the get_mode() update which was committed
as part of:
- regulator: da9062: fix suspend_enable/disable preparation
[a72865f057]
Signed-off-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Link: https://lore.kernel.org/r/20200324092516.60B5C3FB8D@swsrvapps-01.diasemi.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The .set_suspend_enable() and .set_suspend_disable() methods are not
supposed to immediately change the regulator state but just indicated
if the regulator should be enabled or disabled when standby mode is
entered (by a hardware signal).
However currently they set control the SEL bits in the DVC registers,
which causes the voltage to change to immediately between the "A"
(normal) and "B" (standby) values as programmed and does nothing for
the enable state...
This means that "regulator-on-in-suspend" does not work (the regulator
is switched off when the PMIC enters standby mode on the hardware
signal) and, potentially, depending on the A and B voltage
configurations the voltage could be incorrectly changed *before*
actually entering suspend.
The right bit to use for the functionality is the "CONF" bit in the
"CONT" register.
The detailed register description says "Sequencer target state"
for this bit which is not very clear but the functional description
is clearer.
>From 5.1.5 System Enable:
De-asserting SYS_EN (changing from active to passive state)
clears control SYSTEM_EN which triggers a power down sequence
into hibernate/standby mode
...
With the exception of supplies that have the xxxx_CONF control
bit asserted, all regulators in power domains POWER1, POWER, and
SYSTEM are sequentially disabled in reverse order.
Regulators with the <x>_CONF bit set remain on but change the
active voltage controlregisters from V<x>_A to V<x>_B
(if V<x>_B is notalready selected).
Signed-off-by: Martin Fuzzey <martin.fuzzey@flowbird.group>
Link: https://lore.kernel.org/r/1584461691-14344-1-git-send-email-martin.fuzzey@flowbird.group
Signed-off-by: Mark Brown <broonie@kernel.org>
MP8867 is an I2C-controlled adjustable voltage regulator made by
Monolithic Power Systems. The difference between MP8867 and MP8869
are:
1.If V_BOOT, the vref of MP8869 is fixed at 600mv while vref of
MP8867 is determined by the I2C control.
2.For MP8867, when setting voltage, if the step is within 5, we
need to manually set the GO BIT to 0.
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Link: https://lore.kernel.org/r/20200316223127.4b1ecc92@xhacker
Signed-off-by: Mark Brown <broonie@kernel.org>
The MP8869 from Monolithic Power Systems is a single output DC/DC
converter. The voltage can be controlled via I2C.
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Link: https://lore.kernel.org/r/20200316223020.1a6d92ae@xhacker
Signed-off-by: Mark Brown <broonie@kernel.org>
With current code:
st-gyro-i2c i2c-PRP0001:00: i2c-PRP0001:00 supply vdd not found, using dummy regulator
which looks a bit oververbose.
Replace this with simplified format string for the above case, and drop
"deviceless" case since for all dev_*() macros used in _regulator_get()
the "(null)" will be printed anyway.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200312183245.1612-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
A couple of small fixes, one for a minor issue in the stm32-vrefbuf
driver and a documentation fix in the Qualcomm code.
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Merge tag 'regulator-fix-v5.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator
Pull regulator fixes from Mark Brown:
"A couple of small fixes, one for a minor issue in the stm32-vrefbuf
driver and a documentation fix in the Qualcomm code"
* tag 'regulator-fix-v5.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
regulator: stm32-vrefbuf: fix a possible overshoot when re-enabling
regulator: qcom_spmi: Fix docs for PM8004
The regulator_init_complete_work logic defers the cleanup for an
arbitrary 30 seconds of time to allow modules loaded by userland
to start.
This arbitrary timeout is similar to the
driver_deferred_probe_timeout value, and its been suggested we
align these so users have a method to extend the timeouts as
needed.
So this patch changes the logic to use the
driver_deferred_probe_timeout value for the delay value if it
is set (using a delay of 0 if it is not).
Cc: linux-pm@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Thierry Reding <treding@nvidia.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Saravana Kannan <saravanak@google.com>
Cc: Todd Kjos <tkjos@google.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Kevin Hilman <khilman@kernel.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Rob Herring <robh@kernel.org>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Link: https://lore.kernel.org/r/20200225050828.56458-7-john.stultz@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
There maybe an overshoot, when disabling, then re-enabling vrefbuf
too quickly. VREFBUF is used by ADC/DAC on some boards. When re-enabling
too quickly, an overshoot on the reference voltage make the conversions
inaccurate for a short period of time.
- Don't put the VREFBUF in HiZ when disabling, to force an active
discharge.
- Enforce a 1ms OFF/ON delay
Fixes: 0cdbf481e9 ("regulator: Add support for stm32-vrefbuf")
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Message-Id: <1583312132-20932-1-git-send-email-fabrice.gasnier@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
devm_regulator_register() could return -EPROBE_DEFER when trying to
get init data and NOT all resources are available at that time, for
this case, error message is better to be present for debug level ONLY.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Link: https://lore.kernel.org/r/1583243052-1930-1-git-send-email-Anson.Huang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Deferred probe is an expected return value for devm_pwm_get(). Given
that the driver deals with it properly, rather than warn on probe
deferral, only output a message on probe deferral if debug level
prints are enabled.
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Link: https://lore.kernel.org/r/20200302141428.14119-1-jonathanh@nvidia.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Smb208 regulators are used on some ipq806x soc.
Add support for it to make it avaiable on some routers
that use it.
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Signed-off-by: Adrian Panella <ianchi74@outlook.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20200219163711.479-1-ansuelsmth@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
It works incidentally, because AXP20X_DCDC2_LDO3_V_RAMP_DCDC2_EN
is non-zero, but the false branch value really should be just 0.
Signed-off-by: Ondrej Jirman <megous@megous.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Link: https://lore.kernel.org/r/20200222235634.243805-1-megous@megous.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The current codebase makes use of the zero-length array language
extension to the C90 standard, but the preferred mechanism to declare
variable-length types such as these ones is a flexible array member[1][2],
introduced in C99:
struct foo {
int stuff;
struct boo array[];
};
By making use of the mechanism above, we will get a compiler warning
in case the flexible array does not occur last in the structure, which
will help us prevent some kind of undefined behavior bugs from being
inadvertenly introduced[3] to the codebase from now on.
This issue was found with the help of Coccinelle.
[1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
[2] https://github.com/KSPP/linux/issues/21
[3] commit 7649773293 ("cxgb3/l2t: Fix undefined behaviour")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Acked-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Link: https://lore.kernel.org/r/20200211234612.GA28682@embeddedor
Signed-off-by: Mark Brown <broonie@kernel.org>
The current codebase makes use of the zero-length array language
extension to the C90 standard, but the preferred mechanism to declare
variable-length types such as these ones is a flexible array member[1][2],
introduced in C99:
struct foo {
int stuff;
struct boo array[];
};
By making use of the mechanism above, we will get a compiler warning
in case the flexible array does not occur last in the structure, which
will help us prevent some kind of undefined behavior bugs from being
inadvertenly introduced[3] to the codebase from now on.
This issue was found with the help of Coccinelle.
[1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
[2] https://github.com/KSPP/linux/issues/21
[3] commit 7649773293 ("cxgb3/l2t: Fix undefined behaviour")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Link: https://lore.kernel.org/r/20200211234710.GA29532@embeddedor
Signed-off-by: Mark Brown <broonie@kernel.org>
Adding regulator driver for the device mp5416.
The MP5416 PMIC device contains four DC-DC buck converters and
five regulators, accessed over I2C.
Signed-off-by: Saravanan Sekar <sravanhome@gmail.com>
Link: https://lore.kernel.org/r/20200204110419.25933-3-sravanhome@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The devm_request_threaded_irq() already returns 0 on success
and negative error code on failure. So return from this itself
can be used while preserving error log in case of failure.
Signed-off-by: Rishi Gupta <gupt21@gmail.com>
Link: https://lore.kernel.org/r/1580996996-28798-1-git-send-email-gupt21@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit fixes following errors & warnings in this driver
as reported by checkpatch.pl:
- WARNING: Prefer 'unsigned int' to bare use of 'unsigned'
- WARNING: line over 80 characters
- ERROR: space prohibited before that ',' (ctx:WxW)
- ERROR: code indent should use tabs where possible
- WARNING: Block comments use * on subsequent lines
Signed-off-by: Rishi Gupta <gupt21@gmail.com>
Link: https://lore.kernel.org/r/1580996917-28494-1-git-send-email-gupt21@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Add vin_supply to the regulator description to support a nice
regulator tree.
Signed-off-by: Markus Reichl <m.reichl@fivetechno.de>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/20200203110034.1448-1-m.reichl@fivetechno.de
Signed-off-by: Mark Brown <broonie@kernel.org>
