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path: root/drivers/regulator
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2015-11-05Merge tag 'spi-v4.4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi Pull spi updates from Mark Brown: "Quite a lot of activity in SPI this cycle, almost all of it in drivers with a few minor improvements and tweaks in the core. - Updates to pxa2xx to support Intel Broxton and multiple chip selects. - Support for big endian in the bcm63xx driver. - Multiple slave support for the mt8173 - New driver for the auxiliary SPI controller in bcm2835 SoCs. - Support for Layerscale SoCs in the Freescale DSPI driver" * tag 'spi-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (87 commits) spi: pxa2xx: Rework self-initiated platform data creation for non-ACPI spi: pxa2xx: Add support for Intel Broxton spi: pxa2xx: Detect number of enabled Intel LPSS SPI chip select signals spi: pxa2xx: Add output control for multiple Intel LPSS chip selects spi: pxa2xx: Use LPSS prefix for defines that are Intel LPSS specific spi: Add DSPI support for layerscape family spi: ti-qspi: improve ->remove() callback spi/spi-xilinx: Fix race condition on last word read spi: Drop owner assignment from spi_drivers spi: Add THIS_MODULE to spi_driver in SPI core spi: Setup the master controller driver before setting the chipselect spi: dw: replace magic constant by DW_SPI_DR spi: mediatek: mt8173 spi multiple devices support spi: mediatek: handle controller_data in mtk_spi_setup spi: mediatek: remove mtk_spi_config spi: mediatek: Update document devicetree bindings to support multiple devices spi: fix kernel-doc warnings about missing return desc in spi.c spi: fix kernel-doc warnings about missing return desc in spi.h spi: pxa2xx: Align a few defines spi: pxa2xx: Save other reg_cs_ctrl bits when configuring chip select ...
2015-11-04Merge remote-tracking branches 'regulator/topic/supply', ↵Mark Brown
'regulator/topic/tps6105x' and 'regulator/topic/tps65023' into regulator-next
2015-11-04Merge remote-tracking branches 'regulator/topic/load', ↵Mark Brown
'regulator/topic/max77802', 'regulator/topic/pwm', 'regulator/topic/qcom-smd' and 'regulator/topic/stw481x' into regulator-next
2015-11-04Merge remote-tracking branches 'regulator/topic/da9053' and ↵Mark Brown
'regulator/topic/da9063' into regulator-next
2015-11-04Merge remote-tracking branches 'regulator/topic/act8865', ↵Mark Brown
'regulator/topic/anatop', 'regulator/topic/arizona', 'regulator/topic/axp20x' and 'regulator/topic/bcm590xx' into regulator-next
2015-11-04Merge remote-tracking branch 'regulator/topic/list' into regulator-nextMark Brown
2015-11-04Merge remote-tracking branch 'regulator/topic/core' into regulator-nextMark Brown
2015-11-04Merge remote-tracking branches 'spi/topic/omap-100k', ↵Mark Brown
'spi/topic/omap-uwire', 'spi/topic/owner', 'spi/topic/pxa' and 'spi/topic/pxa2xx' into spi-next
2015-11-04regulator: Use regulator_lock_supply() for get_voltage() tooMark Brown
Since we need to read voltages of parents as part of setting supply voltages we need to be able to do get_voltage() internally without taking locks so reorganize the locking to take locks on the full tree on entry rather than as we recurse when called externally. Reported-by: John Stultz <john.stultz@linaro.org> Tested-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-28spi: Drop owner assignment from spi_driversAndrew F. Davis
An spi_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Andrew F. Davis <afd@ti.com> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-22regulator: stw481x: compile on COMPILE_TESTLuis de Bethencourt
The driver depends on MFD_STW481X but there isn't a build dependency so it's a good idea to allow the driver to always be built when the COMPILE_TEST option is enabled. That way, the driver can be built with a config generated by make allyesconfig and check if a patch would break the build. Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-22regulator: qcom-smd: Correct set_load() unitBjorn Andersson
The set_load() op deals with uA while the SMD packets used mA, so convert as we're building the packet. Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-22regulator: core: Propagate voltage changes to supply regulatorsSascha Hauer
Until now changing the voltage of a regulator only ever effected the regulator itself, but never its supplies. It's a common pattern though to put LDO regulators behind switching regulators. The switching regulators efficiently drop the input voltage but have a high ripple on their output. The output is then cleaned up by the LDOs. For higher energy efficiency the voltage drop at the LDOs should be minimized. For this scenario we need to propagate the voltage change to the supply regulators. Another scenario where voltage propagation is desired is a regulator which only consists of a switch and thus cannot regulate voltages itself. In this case we can pass setting voltages to the supply. This patch adds support for voltage propagation. We do voltage propagation when the current regulator has a minimum dropout voltage specified or if the current regulator lacks a get_voltage operation (indicating it's a switch and not a regulator). Changing the supply voltage must be done carefully. When we are increasing the current regulators output we must first increase the supply voltage and then the regulator itself. When we are decreasing the current regulators voltage we must decrease the supply voltage after changing the current regulators voltage. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-20regulator: core: Factor out regulator_map_voltageSascha Hauer
_regulator_call_set_voltage has code to translate a minimum/maximum voltage pair into a selector. This code is useful for others aswell, so create a regulator_map_voltage function. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-16regulator: i.MX anatop: Allow supply regulatorSascha Hauer
The anatop regulators are SoC internal LDO regulators usually supplied by an external PMIC. This patch adds support for specifying the supply from the device tree using the vin-supply property. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-16regulator: core: create unlocked version of regulator_set_voltageSascha Hauer
The unlocked version will be needed when we start propagating voltage changes to the supply regulators. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-16regulator: arizona-ldo1: Fix handling of GPIO 0Charles Keepax
The LDO1 driver is using the arizona_of_get_named_gpio helper function which will return 0 if an error was encountered whilst parsing the GPIO, as under the pdata scheme 0 was not being treated as a valid GPIO. However, since the regulator framework was expanded to allow the use of GPIO 0 this causes us to attempt to register GPIO 0 when we encountered an error parsing the device tree. This patch uses of_get_named_gpio directly and sets the ena_gpio_initialized flag based on the return value. Fixes: 1de3821ace82 ("regulator: Set ena_gpio_initialized in regulator drivers") Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-16regulator: da9053: Update regulator for DA9053 BC silicon supportSteve Twiss
Provide an additional case entry for DA9053_BC in the find_regulator_info() function in order to support BC type silicon for the DA9053 device. Signed-off-by: Steve Twiss <stwiss.opensource@diasemi.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-06Merge remote-tracking branch 'regulator/fix/axp20x' into regulator-linusMark Brown
2015-10-05regulator: axp20x: set supply names for AXP22X DC1SW/DC5LDO internallyChen-Yu Tsai
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>
2015-10-05mfd: tps6105x: Use i2c regmap to access registersGrigoryev Denis
This patch modifies tps6105x and associated function driver to use regmap instead of operating directly on i2c. Signed-off-by: Denis Grigoryev <grigoryev@fastwel.ru> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2015-10-02regulator: act8865: support output voltage by VSET2[] bitsWenyou Yang
For the step-down DC/DC regulators, the output voltage is selectable by setting VSEL pin that when VSEL is low, output voltage is programmed by VSET1[] bits, and when VSEL is high, output voltage is programmed by VSET2[] bits. The DT property "active-semi,vsel-high" is used to specify the VSEL pin at high on the board. Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> Reviewed-by: Ludovic Desroches <ludovic.desroches@atmel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-02regulator: arizona: add support for WM8998 and WM1814Richard Fitzgerald
Signed-off-by: Richard Fitzgerald <rf@opensource.wolfsonmicro.com> Acked-by: Mark Brown <broonie@kernel.org> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-01regulator: core: create unlocked version of regulator_list_voltageSascha Hauer
The unlocked version will be needed when we start propagating voltage changes to the supply regulators. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-01regulator: core: introduce function to lock regulators and its suppliesSascha Hauer
Each regulator_dev is locked with its own mutex. This is fine as long as only one regulator_dev is locked, but makes lockdep unhappy when we have to walk up the supply chain like it can happen in regulator_get_voltage: regulator_get_voltage -> mutex_lock(&regulator->rdev->mutex) -> _regulator_get_voltage(regulator->rdev) -> regulator_get_voltage(rdev->supply) -> mutex_lock(&regulator->rdev->mutex); This causes lockdep to issue a possible deadlock warning. There are at least two ways to work around this: - We can always lock the whole supply chain using the functions introduced with this patch. - We could store the current voltage in struct regulator_rdev so that we do not have to walk up the supply chain for the _regulator_get_voltage case. Anyway, regulator_lock_supply/regulator_unlock_supply will be needed once we allow regulator_set_voltage to optimize the supply voltages. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-01regulator: core: Handle probe deferral from DT when resolving suppliesMark Brown
When resolving regulator-regulator supplies we ignore probe deferral returns from regulator_dev_lookup() (such as are generated for DT when we can see a supply is registered) and just fall back to the dummy regulator if there are full constraints (as is the case for DT). This means that probe deferral is broken for DT systems, fix that by paying attention to -EPROBE_DEFER return codes like we do -ENODEV. A further patch will simplify this further, this is a minimal fix for the specific issue. Fixes: 9f7e25edb1575a6d2 (regulator: core: Handle full constraints systems when resolving supplies) Reported-by: Sascha Hauer <s.hauer@pengutronix.de> Tested-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Mark Brown <broonnie@kernel.org> Cc: stable@vger.kernel.org
2015-09-29regulator: axp20x: Fix enable bit indexes for DCDC4 and DCDC5Chen-Yu Tsai
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
2015-09-21Merge remote-tracking branches 'regulator/fix/anatop', 'regulator/fix/gpio', ↵Mark Brown
'regulator/fix/pbias', 'regulator/fix/tpx65218' and 'regulator/fix/vexpress' into regulator-linus
2015-09-21Merge remote-tracking branch 'regulator/fix/core' into regulator-linusMark Brown
2015-09-21regulator: pwm: implement ->enable(), ->disable() and ->is_enabled methodsBoris Brezillon
Implement the ->enable(), ->disable() and ->is_enabled methods and remove the PWM call in ->set_voltage_sel(). This is particularly important for critical regulators tagged as always-on, because not claiming the PWM (and its dependencies) might lead to unpredictable behavior (like a system hang because the PWM clk is only claimed when the PWM device is enabled). Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-09-21regulator: core: Remove regulator_listTomeu Vizoso
As we are already registering a device with regulator_class for each regulator device, regulator_list is redundant and can be replaced with calls to class_find_device() and class_for_each_device(). Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-09-21regulator: tps65023: add device tree supportThomas Elste
Add device tree based initialization support for tps65023 regulators. Therefore add macros for regulator definition setting of_match and regulators_node members. Add initialization of regulator_desc data using these macros. Remove old regulator_desc initialization. Add device tree binding document for tps65023 regulators. Signed-off-by: Thomas Elste <thomas.elste@imms.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-09-19regulator: vexpress: Fix module autoload for OF platform driverLuis de Bethencourt
This platform driver has a OF device ID table but the OF module alias information is not created so module autoloading won't work. Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-09-19regulator: gpio: Fix module autoload for OF platform driverLuis de Bethencourt
This platform driver has a OF device ID table but the OF module alias information is not created so module autoloading won't work. Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-09-19regulator: anatop: Fix module autoload for OF platform driverLuis de Bethencourt
This platform driver has a OF device ID table but the OF module alias information is not created so module autoloading won't work. Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-09-17regulator: core: Correct return value check in regulator_resolve_supplyCharles Keepax
The ret pointer passed to regulator_dev_lookup is only filled with a valid error code if regulator_dev_lookup returned NULL. Currently regulator_resolve_supply checks this ret value before it checks if a regulator was returned, this can result in valid regulator lookups being ignored. Fixes: 6261b06de565 ("regulator: Defer lookup of supply to regulator_get") Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Signed-off-by: Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org
2015-09-17regulator: Introduce property to flag set-load supportBjorn Andersson
Introduce "regulator-allow-set-load" property to make it possible to flag in the board configuration that a regulator is allowed to have the load requirements changed. Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-09-16regulator: core: Make error messages more informativeStephen Boyd
The same error print exists 4 times in the regulator core <rdev>: operation not allowed Unfortunately, seeing this in the dmesg is not very informative. Add what type of operation is not allowed to the message so that these errors are unique, hopefully pointing developers in the right direction <rdev>: drms operation not allowed <rdev>: voltage operation not allowed <rdev>: current operation not allowed <rdev>: mode operation not allowed Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-09-16regulator: tps65218: Fix missing zero typoAndrew F. Davis
Add missing zero to value. This will be needed when range checking is implemented. Signed-off-by: Andrew F. Davis <afd@ti.com> Acked-by: Dan Murphy <dmurphy@ti.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-09-14regulator: da9063: Remove unneeded semicolonJavier Martinez Canillas
It's clearly a typo error that just creates a null statement so remove it. Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-09-14regulator: bcm590xx: Remove unneeded semicolonJavier Martinez Canillas
It's clearly a typo error that just creates a null statement so remove it. Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-09-08Merge tag 'regmap-v4.3' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap Pull regmap updates from Mark Brown: "This has been a busy release for regmap. By far the biggest set of changes here are those from Markus Pargmann which implement support for block transfers in smbus devices. This required quite a bit of refactoring but leaves us better able to handle odd restrictions that controllers may have and with better performance on smbus. Other new features include: - Fix interactions with lockdep for nested regmaps (eg, when a device using regmap is connected to a bus where the bus controller has a separate regmap). Lockdep's default class identification is too crude to work without help. - Support for must write bitfield operations, useful for operations which require writing a bit to trigger them from Kuniori Morimoto. - Support for delaying during register patch application from Nariman Poushin. - Support for overriding cache state via the debugfs implementation from Richard Fitzgerald" * tag 'regmap-v4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap: (25 commits) regmap: fix a NULL pointer dereference in __regmap_init regmap: Support bulk reads for devices without raw formatting regmap-i2c: Add smbus i2c block support regmap: Add raw_write/read checks for max_raw_write/read sizes regmap: regmap max_raw_read/write getter functions regmap: Introduce max_raw_read/write for regmap_bulk_read/write regmap: Add missing comments about struct regmap_bus regmap: No multi_write support if bus->write does not exist regmap: Split use_single_rw internally into use_single_read/write regmap: Fix regmap_bulk_write for bus writes regmap: regmap_raw_read return error on !bus->read regulator: core: Print at debug level on debugfs creation failure regmap: Fix regmap_can_raw_write check regmap: fix typos in regmap.c regmap: Fix integertypes for register address and value regmap: Move documentation to regmap.h regmap: Use different lockdep class for each regmap init call thermal: sti: Add parentheses around bridge->ops->regmap_init call mfd: vexpress: Add parentheses around bridge->ops->regmap_init call regmap: debugfs: Fix misuse of IS_ENABLED ...
2015-09-04Merge remote-tracking branches 'regmap/topic/debugfs' and ↵Mark Brown
'regmap/topic/force-update' into regmap-next
2015-09-03regulator: pbias: program pbias register offset in pbias driverKishon Vijay Abraham I
Add separate compatible strings for every platform and populate the pbias register offset in the driver data. This helps avoid depending on the dt for pbias register offset. Also update the dt binding documentation for the new compatible strings. Suggested-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-09-02regulator: qcom_smd: Handle big endian CPUsStephen Boyd
The smd rpm structures are always in little endian, but this driver is not capable of being used on big endian CPUs. Annotate the little endian data members and update the code to do the proper byte swapping. Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-09-02regulator: core: fix possible NULL dereferenceSudip Mukherjee
We were checking rdev->supply for NULL after dereferencing it. Lets check for rdev->supply along with _regulator_is_enabled() and call regulator_enable() only if rdev->supply is not NULL. Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-30Merge remote-tracking branch 'regulator/topic/tps6586x' into regulator-nextMark Brown
2015-08-30Merge remote-tracking branches 'regulator/topic/qcom-smd', ↵Mark Brown
'regulator/topic/qcom-spmi', 'regulator/topic/rk808', 'regulator/topic/stub' and 'regulator/topic/tol' into regulator-next
2015-08-30Merge remote-tracking branches 'regulator/topic/mt6311', ↵Mark Brown
'regulator/topic/ocp', 'regulator/topic/owner', 'regulator/topic/pfuze100' and 'regulator/topic/pwm' into regulator-next
2015-08-30Merge remote-tracking branches 'regulator/topic/lp872x', ↵Mark Brown
'regulator/topic/ltc3589', 'regulator/topic/max77693' and 'regulator/topic/max8973' into regulator-next