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Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
668 lines
22 KiB
C
668 lines
22 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (C) 2014-2015 Samsung Electronics
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* Przemyslaw Marczak <p.marczak@samsung.com>
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*/
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#ifndef _INCLUDE_REGULATOR_H_
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#define _INCLUDE_REGULATOR_H_
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struct udevice;
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/**
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* U-Boot Voltage/Current Regulator
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* ================================
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*
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* The regulator API is based on a driver model, with the device tree support.
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* And this header describes the functions and data types for the uclass id:
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* 'UCLASS_REGULATOR' and the regulator driver API.
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*
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* The regulator uclass - is based on uclass platform data which is allocated,
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* automatically for each regulator device on bind and 'dev->uclass_plat'
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* points to it. The data type is: 'struct dm_regulator_uclass_plat'.
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* The uclass file: 'drivers/power/regulator/regulator-uclass.c'
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*
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* The regulator device - is based on driver's model 'struct udevice'.
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* The API can use regulator name in two meanings:
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* - devname - the regulator device's name: 'dev->name'
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* - platname - the device's plat's name. So in the code it looks like:
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* 'uc_pdata = dev->uclass_plat'; 'name = uc_pdata->name'.
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*
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* The regulator device driver - provide an implementation of uclass operations
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* pointed by 'dev->driver->ops' as a struct of type 'struct dm_regulator_ops'.
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*
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* To proper bind the regulator device, the device tree node should provide
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* regulator constraints, like in the example below:
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*
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* ldo1 {
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* regulator-name = "VDD_MMC_1.8V"; (must be unique for proper bind)
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* regulator-min-microvolt = <1000000>; (optional)
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* regulator-max-microvolt = <1000000>; (optional)
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* regulator-min-microamp = <1000>; (optional)
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* regulator-max-microamp = <1000>; (optional)
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* regulator-always-on; (optional)
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* regulator-boot-on; (optional)
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* };
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*
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* Note: For the proper operation, at least name constraint is needed, since
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* it can be used when calling regulator_get_by_platname(). And the mandatory
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* rule for this name is, that it must be globally unique for the single dts.
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* If regulator-name property is not provided, node name will be chosen.
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*
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* Regulator bind:
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* For each regulator device, the device_bind() should be called with passed
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* device tree offset. This is required for this uclass's '.post_bind' method,
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* which does the scan on the device node, for the 'regulator-name' constraint.
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* If the parent is not a PMIC device, and the child is not bind by function:
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* 'pmic_bind_childs()', then it's recommended to bind the device by call to
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* dm_scan_fdt_dev() - this is usually done automatically for bus devices,
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* as a post bind method.
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*
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* Regulator get:
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* Having the device's name constraint, we can call regulator_by_platname(),
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* to find the required regulator. Before return, the regulator is probed,
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* and the rest of its constraints are put into the device's uclass platform
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* data, by the uclass regulator '.pre_probe' method.
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*
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* For more info about PMIC bind, please refer to file: 'include/power/pmic.h'
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*
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* Note:
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* Please do not use the device_bind_by_name() function, since it pass '-1' as
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* device node offset - and the bind will fail on uclass .post_bind method,
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* because of missing 'regulator-name' constraint.
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*
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*
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* Fixed Voltage/Current Regulator
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* ===============================
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*
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* When fixed voltage regulator is needed, then enable the config:
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* - CONFIG_DM_REGULATOR_FIXED
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*
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* The driver file: 'drivers/power/regulator/fixed.c', provides basic support
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* for control the GPIO, and return the device tree constraint values.
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*
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* To bind the fixed voltage regulator device, we usually use a 'simple-bus'
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* node as a parent. And 'regulator-fixed' for the driver compatible. This is
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* the same as in the kernel. The example node of fixed regulator:
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*
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* simple-bus {
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* compatible = "simple-bus";
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* #address-cells = <1>;
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* #size-cells = <0>;
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*
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* blue_led {
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* compatible = "regulator-fixed";
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* regulator-name = "VDD_LED_3.3V";
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* regulator-min-microvolt = <3300000>;
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* regulator-max-microvolt = <3300000>;
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* gpio = <&gpc1 0 GPIO_ACTIVE_LOW>;
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* };
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* };
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*
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* The fixed regulator devices also provide regulator uclass platform data. And
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* devices bound from such node, can use the regulator drivers API.
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*/
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/* enum regulator_type - used for regulator_*() variant calls */
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enum regulator_type {
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REGULATOR_TYPE_LDO = 0,
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REGULATOR_TYPE_BUCK,
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REGULATOR_TYPE_DVS,
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REGULATOR_TYPE_FIXED,
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REGULATOR_TYPE_GPIO,
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REGULATOR_TYPE_OTHER,
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};
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/**
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* struct dm_regulator_mode - this structure holds an information about
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* each regulator operation mode. Probably in most cases - an array.
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* This will be probably a driver-static data, since it is device-specific.
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*
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* @id - a driver-specific mode id
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* @register_value - a driver-specific value for its mode id
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* @name - the name of mode - used for regulator command
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* Note:
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* The field 'id', should be always a positive number, since the negative values
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* are reserved for the errno numbers when returns the mode id.
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*/
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struct dm_regulator_mode {
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int id; /* Set only as >= 0 (negative value is reserved for errno) */
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int register_value;
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const char *name;
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};
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enum regulator_flag {
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REGULATOR_FLAG_AUTOSET_UV = 1 << 0,
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REGULATOR_FLAG_AUTOSET_UA = 1 << 1,
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};
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/**
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* struct dm_regulator_uclass_plat - pointed by dev->uclass_plat, and
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* allocated on each regulator bind. This structure holds an information
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* about each regulator's constraints and supported operation modes.
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* There is no "step" voltage value - so driver should take care of this.
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*
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* @type - one of 'enum regulator_type'
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* @mode - pointer to the regulator mode (array if more than one)
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* @mode_count - number of '.mode' entries
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* @min_uV* - minimum voltage (micro Volts)
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* @max_uV* - maximum voltage (micro Volts)
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* @min_uA* - minimum amperage (micro Amps)
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* @max_uA* - maximum amperage (micro Amps)
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* @always_on* - bool type, true or false
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* @boot_on* - bool type, true or false
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* @force_off* - bool type, true or false
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* TODO(sjg@chromium.org): Consider putting the above two into @flags
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* @ramp_delay - Time to settle down after voltage change (unit: uV/us)
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* @flags: - flags value (see REGULATOR_FLAG_...)
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* @name** - fdt regulator name - should be taken from the device tree
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* ctrl_reg: - Control register offset used to enable/disable regulator
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* volt_reg: - register offset for writing voltage vsel values
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*
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* Note:
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* * - set automatically on device probe by the uclass's '.pre_probe' method.
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* ** - set automatically on device bind by the uclass's '.post_bind' method.
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* The constraints: type, mode, mode_count, can be set by device driver, e.g.
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* by the driver '.probe' method.
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*/
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struct dm_regulator_uclass_plat {
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enum regulator_type type;
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struct dm_regulator_mode *mode;
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int mode_count;
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int min_uV;
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int max_uV;
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int init_uV;
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int min_uA;
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int max_uA;
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unsigned int ramp_delay;
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bool always_on;
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bool boot_on;
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bool force_off;
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const char *name;
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int flags;
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u8 ctrl_reg;
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u8 volt_reg;
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bool suspend_on;
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u32 suspend_uV;
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};
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/* Regulator device operations */
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struct dm_regulator_ops {
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/**
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* The regulator output value function calls operates on a micro Volts.
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*
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* get/set_value - get/set output value of the given output number
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* @dev - regulator device
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* Sets:
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* @uV - set the output value [micro Volts]
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* @return output value [uV] on success or negative errno if fail.
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*/
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int (*get_value)(struct udevice *dev);
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int (*set_value)(struct udevice *dev, int uV);
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/**
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* The regulator suspend output value function calls operates
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* on a micro Volts.
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*
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* get/set_suspen_value - get/set suspend mode output value
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* @dev - regulator device
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* Sets:
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* @uV - set the suspend output value [micro Volts]
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* @return output value [uV] on success or negative errno if fail.
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*/
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int (*set_suspend_value)(struct udevice *dev, int uV);
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int (*get_suspend_value)(struct udevice *dev);
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/**
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* The regulator output current function calls operates on a micro Amps.
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*
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* get/set_current - get/set output current of the given output number
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* @dev - regulator device
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* Sets:
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* @uA - set the output current [micro Amps]
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* @return output value [uA] on success or negative errno if fail.
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*/
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int (*get_current)(struct udevice *dev);
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int (*set_current)(struct udevice *dev, int uA);
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/**
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* The most basic feature of the regulator output is its enable state.
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*
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* get/set_enable - get/set enable state of the given output number
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* @dev - regulator device
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* Sets:
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* @enable - set true - enable or false - disable
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* @return true/false for get or -errno if fail; 0 / -errno for set.
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*/
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int (*get_enable)(struct udevice *dev);
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int (*set_enable)(struct udevice *dev, bool enable);
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/**
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* The most basic feature of the regulator output is its enable state
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* in suspend mode.
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*
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* get/set_suspend_enable - get/set enable state of the suspend output
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* @dev - regulator device
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* Sets:
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* @enable - set true - enable or false - disable
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* @return true/false for get or -errno if fail; 0 / -errno for set.
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*/
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int (*set_suspend_enable)(struct udevice *dev, bool enable);
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int (*get_suspend_enable)(struct udevice *dev);
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/**
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* The 'get/set_mode()' function calls should operate on a driver-
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* specific mode id definitions, which should be found in:
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* field 'id' of struct dm_regulator_mode.
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*
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* get/set_mode - get/set operation mode of the given output number
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* @dev - regulator device
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* Sets
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* @mode_id - set output mode id (struct dm_regulator_mode->id)
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* @return id/0 for get/set on success or negative errno if fail.
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* Note:
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* The field 'id' of struct type 'dm_regulator_mode', should be always
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* a positive number, since the negative is reserved for the error.
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*/
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int (*get_mode)(struct udevice *dev);
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int (*set_mode)(struct udevice *dev, int mode_id);
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};
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#if CONFIG_IS_ENABLED(DM_REGULATOR)
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/**
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* regulator_mode: returns a pointer to the array of regulator mode info
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*
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* @dev - pointer to the regulator device
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* @modep - pointer to the returned mode info array
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* Return: - count of modep entries on success or negative errno if fail.
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*/
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int regulator_mode(struct udevice *dev, struct dm_regulator_mode **modep);
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/**
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* regulator_get_value: get microvoltage voltage value of a given regulator
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*
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* @dev - pointer to the regulator device
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* Return: - positive output value [uV] on success or negative errno if fail.
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*/
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int regulator_get_value(struct udevice *dev);
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/**
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* regulator_set_value: set the microvoltage value of a given regulator.
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*
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* @dev - pointer to the regulator device
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* @uV - the output value to set [micro Volts]
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* Return: - 0 on success or -errno val if fails
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*/
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int regulator_set_value(struct udevice *dev, int uV);
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/**
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* regulator_set_suspend_value: set the suspend microvoltage value of a given regulator.
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*
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* @dev - pointer to the regulator device
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* @uV - the output suspend value to set [micro Volts]
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* Return: - 0 on success or -errno val if fails
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*/
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int regulator_set_suspend_value(struct udevice *dev, int uV);
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/**
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* regulator_get_suspend_value: get the suspend microvoltage value of a given regulator.
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*
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* @dev - pointer to the regulator device
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* Return: - positive output value [uV] on success or negative errno if fail.
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*/
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int regulator_get_suspend_value(struct udevice *dev);
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/**
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* regulator_set_value_force: set the microvoltage value of a given regulator
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* without any min-,max condition check
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*
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* @dev - pointer to the regulator device
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* @uV - the output value to set [micro Volts]
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* Return: - 0 on success or -errno val if fails
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*/
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int regulator_set_value_force(struct udevice *dev, int uV);
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/**
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* regulator_get_current: get microampere value of a given regulator
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*
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* @dev - pointer to the regulator device
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* Return: - positive output current [uA] on success or negative errno if fail.
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*/
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int regulator_get_current(struct udevice *dev);
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/**
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* regulator_set_current: set the microampere value of a given regulator.
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*
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* @dev - pointer to the regulator device
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* @uA - set the output current [micro Amps]
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* Return: - 0 on success or -errno val if fails
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*/
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int regulator_set_current(struct udevice *dev, int uA);
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/**
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* regulator_get_enable: get regulator device enable state.
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*
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* @dev - pointer to the regulator device
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* Return: - true/false of enable state or -errno val if fails
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*/
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int regulator_get_enable(struct udevice *dev);
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/**
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* regulator_set_enable: set regulator enable state
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*
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* @dev - pointer to the regulator device
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* @enable - set true or false
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* Return: - 0 on success or -errno val if fails
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*/
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int regulator_set_enable(struct udevice *dev, bool enable);
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/**
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* regulator_set_enable_if_allowed: set regulator enable state if allowed by
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* regulator
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*
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* @dev - pointer to the regulator device
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* @enable - set true or false
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* Return: - 0 on success or if enabling is not supported
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* -errno val if fails.
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*/
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int regulator_set_enable_if_allowed(struct udevice *dev, bool enable);
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/**
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* regulator_set_suspend_enable: set regulator suspend enable state
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*
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* @dev - pointer to the regulator device
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* @enable - set true or false
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* Return: - 0 on success or -errno val if fails
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*/
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int regulator_set_suspend_enable(struct udevice *dev, bool enable);
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/**
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* regulator_get_suspend_enable: get regulator suspend enable state
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*
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* @dev - pointer to the regulator device
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* Return: - true/false of enable state or -errno val if fails
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*/
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int regulator_get_suspend_enable(struct udevice *dev);
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/**
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* regulator_get_mode: get active operation mode id of a given regulator
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*
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* @dev - pointer to the regulator device
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* Return: - positive mode 'id' number on success or -errno val if fails
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* Note:
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* The device can provide an array of operating modes, which is type of struct
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* dm_regulator_mode. Each mode has it's own 'id', which should be unique inside
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* that array. By calling this function, the driver should return an active mode
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* id of the given regulator device.
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*/
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int regulator_get_mode(struct udevice *dev);
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/**
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* regulator_set_mode: set the given regulator's, active mode id
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*
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* @dev - pointer to the regulator device
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* @mode_id - mode id to set ('id' field of struct type dm_regulator_mode)
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* Return: - 0 on success or -errno value if fails
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* Note:
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* The device can provide an array of operating modes, which is type of struct
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* dm_regulator_mode. Each mode has it's own 'id', which should be unique inside
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* that array. By calling this function, the driver should set the active mode
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* of a given regulator to given by "mode_id" argument.
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*/
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int regulator_set_mode(struct udevice *dev, int mode_id);
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/**
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* regulators_enable_boot_on() - enable regulators needed for boot
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*
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* This enables all regulators which are marked to be on at boot time. This
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* only works for regulators which don't have a range for voltage/current,
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* since in that case it is not possible to know which value to use.
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*
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* This effectively calls regulator_autoset() for every regulator.
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*/
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int regulators_enable_boot_on(bool verbose);
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/**
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* regulators_enable_boot_off() - disable regulators needed for boot
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*
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* This disables all regulators which are marked to be off at boot time.
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*
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* This effectively calls regulator_unset() for every regulator.
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*/
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int regulators_enable_boot_off(bool verbose);
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/**
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* regulator_autoset: setup the voltage/current on a regulator
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*
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* The setup depends on constraints found in device's uclass's platform data
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* (struct dm_regulator_uclass_plat):
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*
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* - Enable - will set - if any of: 'always_on' or 'boot_on' is set to true,
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* or if both are unset, then the function returns
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* - Voltage value - will set - if '.min_uV' and '.max_uV' values are equal
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* - Current limit - will set - if '.min_uA' and '.max_uA' values are equal
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*
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* The function returns on the first-encountered error.
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*
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* @platname - expected string for dm_regulator_uclass_plat .name field
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* @devp - returned pointer to the regulator device - if non-NULL passed
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* @return: 0 on success or negative value of errno.
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*/
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int regulator_autoset(struct udevice *dev);
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/**
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* regulator_unset: turn off a regulator
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*
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* The setup depends on constraints found in device's uclass's platform data
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* (struct dm_regulator_uclass_platdata):
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*
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* - Disable - will set - if 'force_off' is set to true,
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*
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* The function returns on the first-encountered error.
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*/
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int regulator_unset(struct udevice *dev);
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/**
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* regulator_autoset_by_name: setup the regulator given by its uclass's
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* platform data name field. The setup depends on constraints found in device's
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* uclass's platform data (struct dm_regulator_uclass_plat):
|
|
* - Enable - will set - if any of: 'always_on' or 'boot_on' is set to true,
|
|
* or if both are unset, then the function returns
|
|
* - Voltage value - will set - if '.min_uV' and '.max_uV' values are equal
|
|
* - Current limit - will set - if '.min_uA' and '.max_uA' values are equal
|
|
*
|
|
* The function returns on first encountered error.
|
|
*
|
|
* @platname - expected string for dm_regulator_uclass_plat .name field
|
|
* @devp - returned pointer to the regulator device - if non-NULL passed
|
|
* @return: 0 on success or negative value of errno.
|
|
*
|
|
* The returned 'regulator' device can be used with:
|
|
* - regulator_get/set_*
|
|
*/
|
|
int regulator_autoset_by_name(const char *platname, struct udevice **devp);
|
|
|
|
/**
|
|
* regulator_list_autoset: setup the regulators given by list of their uclass's
|
|
* platform data name field. The setup depends on constraints found in device's
|
|
* uclass's platform data. The function loops with calls to:
|
|
* regulator_autoset_by_name() for each name from the list.
|
|
*
|
|
* @list_platname - an array of expected strings for .name field of each
|
|
* regulator's uclass plat
|
|
* @list_devp - an array of returned pointers to the successfully setup
|
|
* regulator devices if non-NULL passed
|
|
* @verbose - (true/false) print each regulator setup info, or be quiet
|
|
* Return: 0 on successfully setup of all list entries, otherwise first error.
|
|
*
|
|
* The returned 'regulator' devices can be used with:
|
|
* - regulator_get/set_*
|
|
*
|
|
* Note: The list must ends with NULL entry, like in the "platname" list below:
|
|
* char *my_regulators[] = {
|
|
* "VCC_3.3V",
|
|
* "VCC_1.8V",
|
|
* NULL,
|
|
* };
|
|
*/
|
|
int regulator_list_autoset(const char *list_platname[],
|
|
struct udevice *list_devp[],
|
|
bool verbose);
|
|
|
|
/**
|
|
* regulator_get_by_devname: returns the pointer to the pmic regulator device.
|
|
* Search by name, found in regulator device's name.
|
|
*
|
|
* @devname - expected string for 'dev->name' of regulator device
|
|
* @devp - returned pointer to the regulator device
|
|
* Return: 0 on success or negative value of errno.
|
|
*
|
|
* The returned 'regulator' device is probed and can be used with:
|
|
* - regulator_get/set_*
|
|
*/
|
|
int regulator_get_by_devname(const char *devname, struct udevice **devp);
|
|
|
|
/**
|
|
* regulator_get_by_platname: returns the pointer to the pmic regulator device.
|
|
* Search by name, found in regulator uclass plat.
|
|
*
|
|
* @platname - expected string for uc_pdata->name of regulator uclass plat
|
|
* @devp - returns pointer to the regulator device or NULL on error
|
|
* Return: 0 on success or negative value of errno.
|
|
*
|
|
* The returned 'regulator' device is probed and can be used with:
|
|
* - regulator_get/set_*
|
|
*/
|
|
int regulator_get_by_platname(const char *platname, struct udevice **devp);
|
|
|
|
/**
|
|
* device_get_supply_regulator: returns the pointer to the supply regulator.
|
|
* Search by phandle, found in device's node.
|
|
*
|
|
* Note: Please pay attention to proper order of device bind sequence.
|
|
* The regulator device searched by the phandle, must be binded before
|
|
* this function call.
|
|
*
|
|
* @dev - device with supply phandle
|
|
* @supply_name - phandle name of regulator
|
|
* @devp - returned pointer to the supply device
|
|
* Return: 0 on success or negative value of errno.
|
|
*/
|
|
int device_get_supply_regulator(struct udevice *dev, const char *supply_name,
|
|
struct udevice **devp);
|
|
#else
|
|
static inline int regulator_mode(struct udevice *dev, struct dm_regulator_mode **modep)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int regulator_get_value(struct udevice *dev)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int regulator_set_value(struct udevice *dev, int uV)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int regulator_set_suspend_value(struct udevice *dev, int uV)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int regulator_get_suspend_value(struct udevice *dev)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int regulator_set_value_force(struct udevice *dev, int uV)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int regulator_get_current(struct udevice *dev)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int regulator_set_current(struct udevice *dev, int uA)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int regulator_get_enable(struct udevice *dev)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int regulator_set_enable(struct udevice *dev, bool enable)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int regulator_set_enable_if_allowed(struct udevice *dev, bool enable)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int regulator_set_suspend_enable(struct udevice *dev, bool enable)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int regulator_get_suspend_enable(struct udevice *dev)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int regulator_get_mode(struct udevice *dev)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int regulator_set_mode(struct udevice *dev, int mode_id)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int regulators_enable_boot_on(bool verbose)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int regulator_autoset(struct udevice *dev)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int regulator_autoset_by_name(const char *platname, struct udevice **devp)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int regulator_list_autoset(const char *list_platname[], struct udevice *list_devp[],
|
|
bool verbose)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int regulator_get_by_devname(const char *devname, struct udevice **devp)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int regulator_get_by_platname(const char *platname, struct udevice **devp)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int device_get_supply_regulator(struct udevice *dev, const char *supply_name,
|
|
struct udevice **devp)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
#endif
|
|
|
|
#endif /* _INCLUDE_REGULATOR_H_ */
|