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caa4daa2ae
We use 'priv' for private data but often use 'platdata' for platform data. We can't really use 'pdata' since that is ambiguous (it could mean private or platform data). Rename some of the latter variables to end with 'plat' for consistency. Signed-off-by: Simon Glass <sjg@chromium.org>
642 lines
21 KiB
C
642 lines
21 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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/**
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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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* 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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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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* 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_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):
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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 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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* The returned 'regulator' device can be used with:
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* - regulator_get/set_*
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*/
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int regulator_autoset_by_name(const char *platname, struct udevice **devp);
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/**
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* regulator_list_autoset: setup the regulators given by list of their uclass's
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* 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_ */
|