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efdfeb079c
As we augmented the regulator core to accept a GPIO descriptor instead of a GPIO number, we can augment the fixed GPIO regulator to look up and pass that descriptor directly from device tree or board GPIO descriptor look up tables. Some boards just auto-enumerate their fixed regulator platform devices and I have assumed they get names like "fixed-regulator.0" but it's pretty hard to guess this. I need some testing from board maintainers to be sure. Other boards are straight forward, using just plain "fixed-regulator" (ID -1) or "fixed-regulator.1" hammering down the device ID. It seems the da9055 and da9211 has never got around to actually passing any enable gpio into its platform data (not the in-tree code anyway) so we can just decide to simply pass a descriptor instead. The fixed GPIO-controlled regulator in mach-pxa/ezx.c was confusingly named "*_dummy_supply_device" while it is a very real device backed by a GPIO line. There is nothing dummy about it at all, so I renamed it with the infix *_regulator_* as part of this patch set. Intel MID portions tested by Andy. Tested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> # Check the x86 BCM stuff Acked-by: Tony Lindgren <tony@atomide.com> # OMAP1,2,3 maintainer Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Janusz Krzysztofik <jmkrzyszt@gmail.com> Reviewed-by: Mike Rapoport <rppt@linux.vnet.ibm.com> Signed-off-by: Mark Brown <broonie@kernel.org>
73 lines
2.3 KiB
C
73 lines
2.3 KiB
C
/*
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* fixed.h
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*
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* Copyright 2008 Wolfson Microelectronics PLC.
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*
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* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
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*
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* Copyright (c) 2009 Nokia Corporation
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* Roger Quadros <ext-roger.quadros@nokia.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*/
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#ifndef __REGULATOR_FIXED_H
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#define __REGULATOR_FIXED_H
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struct regulator_init_data;
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/**
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* struct fixed_voltage_config - fixed_voltage_config structure
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* @supply_name: Name of the regulator supply
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* @input_supply: Name of the input regulator supply
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* @microvolts: Output voltage of regulator
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* @startup_delay: Start-up time in microseconds
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* @gpio_is_open_drain: Gpio pin is open drain or normal type.
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* If it is open drain type then HIGH will be set
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* through PULL-UP with setting gpio as input
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* and low will be set as gpio-output with driven
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* to low. For non-open-drain case, the gpio will
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* will be in output and drive to low/high accordingly.
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* @enable_high: Polarity of enable GPIO
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* 1 = Active high, 0 = Active low
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* @enabled_at_boot: Whether regulator has been enabled at
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* boot or not. 1 = Yes, 0 = No
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* This is used to keep the regulator at
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* the default state
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* @init_data: regulator_init_data
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*
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* This structure contains fixed voltage regulator configuration
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* information that must be passed by platform code to the fixed
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* voltage regulator driver.
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*/
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struct fixed_voltage_config {
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const char *supply_name;
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const char *input_supply;
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int microvolts;
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unsigned startup_delay;
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unsigned gpio_is_open_drain:1;
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unsigned enable_high:1;
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unsigned enabled_at_boot:1;
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struct regulator_init_data *init_data;
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};
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struct regulator_consumer_supply;
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#if IS_ENABLED(CONFIG_REGULATOR)
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struct platform_device *regulator_register_always_on(int id, const char *name,
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struct regulator_consumer_supply *supplies, int num_supplies, int uv);
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#else
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static inline struct platform_device *regulator_register_always_on(int id, const char *name,
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struct regulator_consumer_supply *supplies, int num_supplies, int uv)
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{
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return NULL;
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}
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#endif
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#define regulator_register_fixed(id, s, ns) regulator_register_always_on(id, \
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"fixed-dummy", s, ns, 0)
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#endif
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