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* regulator: core: Return error in get optional stubTim Kryger2014-04-181-2/+2
| | | | | | | | | | | | | Drivers that call regulator_get_optional are tolerant to the absence of that regulator. By modifying the value returned from the stub function to match that seen when a regulator isn't present, callers can wrap the regulator logic with an IS_ERR based conditional even if they happen to call regulator_is_supported_voltage. This improves efficiency as well as eliminates the possibility for a very subtle bug. Signed-off-by: Tim Kryger <tim.kryger@linaro.org> Reviewed-by: Alex Elder <elder@linaro.org> Signed-off-by: Mark Brown <broonie@linaro.org>
*-. Merge remote-tracking branches 'regulator/topic/max8973', ↵Mark Brown2014-03-261-0/+14
|\ \ | | | | | | | | | 'regulator/topic/max8997', 'regulator/topic/max8998', 'regulator/topic/mc13xxx', 'regulator/topic/pfuze100', 'regulator/topic/rc5t583' and 'regulator/topic/s2mps11' into regulator-next
| | * regulator: pfuze100: add pfuze200 supportRobin Gong2014-03-041-0/+14
| |/ | | | | | | | | | | | | support pfuze200 chip which remove SW1C and SW4 based on pfuze100. Signed-off-by: Robin Gong <b38343@freescale.com> Signed-off-by: Mark Brown <broonie@linaro.org>
* | regulator: helpers: Modify helpers enabling multi-bit controlCarlo Caione2014-03-061-0/+8
|/ | | | | | | | | | | | | | | | | | This patch extends the regulator helpers to account for device that use multiple bits for control when using regmap enable/disable/bypass ops. The actual regulator helpers wrongly assume that the regulator control is always performed using single bits, using in the regulator_desc struct only two parameters *_reg and *_mask defining register and mask for control. This patch extends this struct and introduces the helpers to take into account devices where control is performed using multiple bits and specific multi-bit values are used for enabling/disabling/bypassing the regulator. Signed-off-by: Carlo Caione <carlo@caione.org> Signed-off-by: Mark Brown <broonie@linaro.org>
* regulator: act8865: add PMIC act8865 driverWenyou Yang2013-12-241-0/+53
| | | | | Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> Signed-off-by: Mark Brown <broonie@linaro.org>
* Merge remote-tracking branch 'regulator/topic/optional' into regulator-nextMark Brown2013-10-241-5/+0
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| * regulator: core: Remove unused regulator_use_dummy_regulator()Mark Brown2013-09-171-5/+0
| | | | | | | | | | | | | | | | No boards have used this functionality and the new default of providing dummy regulators by default provides a better solution to the problem it was trying to solve. Signed-off-by: Mark Brown <broonie@linaro.org>
* | Merge remote-tracking branch 'regulator/topic/linear' into regulator-nextMark Brown2013-10-241-2/+9
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| * | regulator: Add REGULATOR_LINEAR_RANGE macroAxel Lin2013-10-111-0/+9
| | | | | | | | | | | | | | | | | | | | | Add REGULATOR_LINEAR_RANGE macro and convert regulator drivers to use it. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@linaro.org>
| * | regulator: Remove max_uV from struct regulator_linear_rangeAxel Lin2013-10-111-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | linear ranges means each range has linear voltage settings. So we can calculate max_uV for each linear range in regulator core rather than set the max_uV field in drivers. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@linaro.org>
* | | Merge remote-tracking branch 'regulator/topic/fixed' into regulator-nextMark Brown2013-10-241-0/+2
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| * | | regulator: core: provide fixed voltage in desc for single voltage railLaxman Dewangan2013-09-101-0/+2
| | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If given rail has the single voltage (n_voltages = 1) then provide the rail voltage through regulator descriptor so that core can use this value for finding voltage. This will avoid the implementation of the callback for get_voltage() or list_voltage() callback on regulator driver. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Mark Brown <broonie@linaro.org>
* | | Merge remote-tracking branch 'regulator/topic/core' into regulator-nextMark Brown2013-10-241-0/+2
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| * | | regulator: core: add support for configuring turn-on time through constraintsLaxman Dewangan2013-09-181-0/+2
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The turn-on time of the regulator depends on the regulator device's electrical characteristics. Sometimes regulator turn-on time also depends on the capacitive load on the given platform and it can be more than the datasheet value. The driver provides the enable-time as per datasheet. Add support for configure the enable ramp time through regulator constraints so that regulator core can take this value for enable time for that regulator. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Acked-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Mark Brown <broonie@linaro.org>
* | | Merge remote-tracking branch 'regulator/topic/alias' into regulator-nextMark Brown2013-10-242-0/+84
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| * | regulator: core: Add ability to create a lookup alias for supplyCharles Keepax2013-10-181-0/+79
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | These patches add the ability to create an alternative device on which a lookup for a certain supply should be conducted. A common use-case for this would be devices that are logically represented as a collection of drivers within Linux but are are presented as a single device from device tree. It this case it is necessary for each sub device to locate their supply data on the main device. Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Signed-off-by: Mark Brown <broonie@linaro.org>
| * | regulator: core: Provide managed regulator registrationMark Brown2013-09-171-0/+5
| |/ | | | | | | | | | | | | | | | | Many regulator drivers have a remove function that consists solely of calling regulator_unregister() so provide a devm_regulator_register() in order to allow this repeated code to be removed and help eliminate error handling code. Signed-off-by: Mark Brown <broonie@linaro.org>
* | regulator: fix fatal kernel-doc errorRandy Dunlap2013-09-171-0/+2
|/ | | | | | | | | | Fix fatal kernel-doc error in <linux/regulator/driver.h>: Error(include/linux/regulator/driver.h:52): cannot understand prototype: 'struct regulator_linear_range ' Signed-off-by: Randy Dunlap <rdunlap@infradead.org> [Rewrote first line -- broonie] Signed-off-by: Mark Brown <broonie@linaro.org>
* Merge remote-tracking branch 'regulator/topic/ramp' into regulator-nextMark Brown2013-09-011-0/+1
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| * regulator: core: Add support for disabling ramp delayYadwinder Singh Brar2013-07-151-0/+1
| | | | | | | | | | | | | | | | | | | | | | Some hardwares support disabling ramp delay, so adding ramp_disable flag to constraints. It will be used to figure out whether ramp_delay in constraints is explicitly set to zero or its unintialized (zero by default). And we don't need to call set_voltage_time_sel() for regulators for whom ramp delay is disabled in constraints. Signed-off-by: Yadwinder Singh Brar <yadi.brar@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
* | Merge remote-tracking branch 'regulator/topic/pfuze100' into regulator-nextMark Brown2013-09-011-0/+44
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| * | regulator: pfuze100: add pfuze100 regulator driverRobin Gong2013-07-251-0/+44
| |/ | | | | | | | | | | | | | | Add pfuze100 regulator driver. Signed-off-by: Robin Gong <b38343@freescale.com> Tested-by: Steffen Trumtrar <s.trumtrar@pengutronix.de> Signed-off-by: Mark Brown <broonie@linaro.org>
* | Merge remote-tracking branch 'regulator/topic/optional' into regulator-nextMark Brown2013-09-011-0/+25
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| * | regulator: Add devm_regulator_get_exclusive()Matthias Kaehlcke2013-08-291-0/+2
| | | | | | | | | | | | | | | | | | | | | Add a resource managed regulator_get_exclusive() Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net> Signed-off-by: Mark Brown <broonie@linaro.org>
| * | regulator: core: Provide hints to the core about optional suppliesMark Brown2013-07-311-1/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | While the majority of supplies on devices are mandatory and can't be physically omitted for electrical reasons some devices do have optional supplies and need to know if they are missing, MMC being the most common of these. Currently the core accurately reports all errors when regulators are requested since it does not know if the supply is one that must be provided even if by a regulator software does not know about or if it is one that may genuinely be disconnected. In order to allow this behaviour to be changed and stub regulators to be provided in the former case add a new regulator request function regulator_get_optional() which provides a hint to the core that the regulator may genuinely not be connected. Currently the implementation is identical to the current behaviour, future patches will add support in the core for returning stub regulators in the case where normal regulator_get() fails and the board has requested it. Signed-off-by: Mark Brown <broonie@linaro.org> Acked-by: Chris Ball <cjb@laptop.org>
| * | regulator: core: Add missing stub for regulator_get_exclusive()Mark Brown2013-07-311-0/+7
| |/ | | | | | | Signed-off-by: Mark Brown <broonie@linaro.org>
* | Merge remote-tracking branch 'regulator/topic/max8660' into regulator-nextMark Brown2013-09-011-1/+1
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| * | regulators: max8660: add DT bindingsDaniel Mack2013-08-021-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | This patch adds devicetree bindings for max8660, along with some documentation. Signed-off-by: Daniel Mack <zonque@gmail.com> Signed-off-by: Mark Brown <broonie@linaro.org>
* | | Merge remote-tracking branch 'regulator/topic/fan53555' into regulator-nextMark Brown2013-09-011-0/+1
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| * | | regulator: fan53555: Prevent multiple include of fan53555.hAxel Lin2013-08-071-0/+1
| | |/ | |/| | | | | | | | | | | | | | | | Add define for __FAN53555_H__ to prevent multiple include of the header file. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@linaro.org>
* | | Merge remote-tracking branch 'regulator/topic/core' into regulator-nextMark Brown2013-09-011-2/+5
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| * | regulator: core: Make set_voltage_tol() try for mid-range firstMark Brown2013-07-151-2/+5
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | The expected semantic for something expressed as a tolerance is that it should deliver the specified value with some deviation allowed but this is not what set_voltage_tol() currently does. Instead it just passes the maximum possible range to set_voltage() which will typically result in a voltage aimed at lower than the target voltage. Instead first try to set a voltage between the target voltage and the upper limit, then fall back on the full range. This will be much more robust against physical variation in systems and makes the API behave more like users would expect. Signed-off-by: Mark Brown <broonie@linaro.org>
* | regulator: core: Add helpers for multiple linear rangesMark Brown2013-07-151-0/+25
|/ | | | | | | | | | | | | Many regulators have several linear ranges of selector with different step sizes, for example offering better resolution at lower voltages. Provide regulator_{map,list}_voltage_linear_range() allowing these regulators to use generic code. To do so a table of regulator_linear_range structs needs to be pointed to from the descriptor. This was inspired by similar code included in a driver submission from Chao Xie and Yi Zhang at Marvell. Signed-off-by: Mark Brown <broonie@linaro.org>
* Merge remote-tracking branch 'regulator/topic/linar' into regulator-nextMark Brown2013-07-011-0/+1
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| * regulator: core: add regulator_get_linear_step()Paul Walmsley2013-06-071-0/+1
| | | | | | | | | | | | | | | | | | | | | | Add regulator_get_linear_step(), which returns the voltage step size between VSEL values for linear regulators. This is intended for use by regulator consumers which build their own voltage-to-VSEL tables. Signed-off-by: Paul Walmsley <pwalmsley@nvidia.com> Reviewed-by: Andrew Chew <achew@nvidia.com> Cc: Matthew Longnecker <mlongnecker@nvidia.com> Signed-off-by: Mark Brown <broonie@linaro.org>
* | regulator: ab8500-ext: Register as a device in its own rightLee Jones2013-06-111-4/+0
|/ | | | | | | | | | | Some platforms don't support the AB8500 external regulators, so instead of having a list of is_<platform>() calls prior to calling ab8500_ext_regulator_init() from ab8500_regulator_probe(), we can only register as a platform device on platforms which require them. It means we also have more control over them when booting with Device Tree. Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Mark Brown <broonielinaro.org>
* Merge remote-tracking branch 'regulator/topic/max8952' into v3.9-rc8Mark Brown2013-04-281-5/+5
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| * regulator: max8952: Add Device Tree supportTomasz Figa2013-04-051-4/+4
| | | | | | | | | | | | | | | | This patch adds Device Tree support to max8952 regulator driver. Signed-off-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| * regulator: max8952: Separate constraints from platform data structTomasz Figa2013-04-051-1/+1
| | | | | | | | | | | | | | | | | | | | | | This patch modifies platform data structure of max8952 driver to use pointer to regulator_init_data struct instead of embedding it. This is a prerequisite for adding Device Tree support for the driver. Signed-off-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* | Merge remote-tracking branch 'regulator/topic/gpio' into v3.9-rc8Mark Brown2013-04-281-2/+2
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| * | regulator: core: use regulator_ena_pin memberKim, Milo2013-03-041-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The regulator_dev has regulator_enable_gpio structure. 'ena_gpio' and 'ena_gpio_invert' were moved to in regulator_enable_gpio. regulator_dev ---> regulator_enable_gpio .ena_gpio .gpio .ena_gpio_invert .ena_gpio_invert Pointer, 'ena_pin' is used for checking valid enable GPIO pin. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Reviewed-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| * | regulator: core: support shared enable GPIO conceptKim, Milo2013-03-041-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A Regulator can be enabled by external GPIO pin. This is configurable in the regulator_config. At this moment, the GPIO can be owned by only one regulator device. In some devices, multiple regulators are enabled by shared one GPIO pin. This patch extends this limitation, enabling shared enable GPIO of regulators. New list for enable GPIO: 'regulator_ena_gpio_list' This manages enable GPIO list. New structure for supporting shared enable GPIO: 'regulator_enable_gpio' The enable count is used for balancing GPIO control count. This count is incremented when GPIO is enabled. On the other hand, it's decremented when GPIO is disabled. Reference count: 'request_count' The reference count, 'request_count' is incremented/decremented on requesting/freeing the GPIO. This count makes sure only free the GPIO when it has no users. How it works If the GPIO is already used, skip requesting new GPIO usage. The GPIO is new one, request GPIO function and add it to the list of enable GPIO. This list is used for balancing enable GPIO count and pin control. Updating a GPIO and invert code moved 'ena_gpio' and 'ena_gpio_invert' of the regulator_config were moved to new function, regulator_ena_gpio_request(). Use regulator_enable_pin structure rather than regulator_dev. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Reviewed-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* | | Merge remote-tracking branch 'regulator/topic/enable-invert' into v3.9-rc8Mark Brown2013-04-281-0/+3
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| * | | regulator: core: Add enable_is_inverted flag to indicate set enable_mask ↵Axel Lin2013-03-051-0/+3
| | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | bits to disable Add enable_is_inverted flag to indicate set enable_mask bits to disable when using regulator_enable_regmap and friends APIs. Signed-off-by: Axel Lin <axel.lin@ingics.com> Reviewed-by: Haojian Zhuang <haojian.zhuang@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* | | Merge remote-tracking branch 'regulator/topic/core' into v3.9-rc8Mark Brown2013-04-281-7/+7
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| * | | regulator: core: Mark all get and enable calls as __must_checkMark Brown2013-03-041-7/+7
| | |/ | |/| | | | | | | | | | | | | | | | It's generally important that devices have power when they expect it so drivers really ought to be checking for errors on the power up paths. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* | | Merge remote-tracking branch 'regulator/topic/ascend' into v3.9-rc8Mark Brown2013-04-281-0/+2
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| * | | regulator: core: Add regulator_map_voltage_ascend() APIAxel Lin2013-04-181-0/+2
| | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A lot of regulator hardware has ascendant voltage list. This patch adds regulator_map_voltage_ascend() and export it. Drivers that have ascendant voltage list can use this as their map_voltage() operation, this is more efficient than default regulator_map_voltage_iterate() function. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* | | regulator: ab8500-ext: Make the return type of ab8500_ext_regulator_exit() voidAxel Lin2013-04-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | ab8500_ext_regulator_exit() never fails. Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Bengt Jonsson <bengt.g.jonsson@stericsson.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* | | regulator: ab8500: Introduce aux5, aux6 regulators for AB8540Zhenhua HUANG2013-04-031-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce aux5, aux6 into ab8540 regulator framework. Signed-off-by: Zhenhua HUANG <zhenhua.huang@stericsson.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Reviewed-by: Maxime COQUELIN <maxime.coquelin@stericsson.com> Reviewed-by: David PARIS <david.paris@stericsson.com> Reviewed-by: Philippe LANGLAIS <philippe.langlais@stericsson.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
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