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32ead3c1ba
Rockchip boards may depend on a working MMC regulator in SPL to successfully load FIT payload from MMC. Typically, these boards only include the vmmc-supply regulator and not its vin-supply in SPL control FDT. The commitf98d812e53("power: regulator: Add vin-supply for GPIO and Fixed regulators") breaks loading FIT from MMC in SPL on some of these boards due to now requiring the vin-supply to be included in the SPL control FDT. The commit also strangely enables any found vin-supply in regulator_common_of_to_plat() and not when a regulator is enabled or as part of regulator_autoset(). Revert the commit to fix FIT loading in SPL on broken boards. If a board needs to have its vin-supply enabled, two options come to mind: - Add regulator-always-on prop to the regulator in the -u-boot.dtsi for any board. - Implement full support for reference counting of regulators and then update the regulator-uclass to enable any found vin-supply when a regulator is enabled. This reverts commitf98d812e53. Reported-by: Dang Huynh <danct12@riseup.net> Signed-off-by: Jonas Karlman <jonas@kwiboo.se> Reviewed-by: Dragan Simic <dsimic@manjaro.org>
48 lines
1.5 KiB
C
48 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2019 Disruptive Technologies Research AS
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* Sven Schwermer <sven.svenschwermer@disruptive-technologies.com>
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*/
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#ifndef _REGULATOR_COMMON_H
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#define _REGULATOR_COMMON_H
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#include <asm/gpio.h>
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struct regulator_common_plat {
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struct gpio_desc gpio; /* GPIO for regulator enable control */
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unsigned int startup_delay_us;
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unsigned int off_on_delay_us;
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unsigned int enable_count;
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};
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int regulator_common_of_to_plat(struct udevice *dev,
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struct regulator_common_plat *plat, const
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char *enable_gpio_name);
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int regulator_common_get_enable(const struct udevice *dev,
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struct regulator_common_plat *plat);
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/*
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* Enable or Disable a regulator
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*
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* This is a reentrant function and subsequent calls that enable will
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* increase an internal counter, and disable calls will decrease the counter.
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* The actual resource will be enabled when the counter gets to 1 coming from 0,
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* and disabled when it reaches 0 coming from 1.
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*
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* @dev: regulator device
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* @plat: Platform data
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* @enable: bool indicating whether to enable or disable the regulator
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* @return:
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* 0 on Success
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* -EBUSY if the regulator cannot be disabled because it's requested by
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* another device
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* -EALREADY if the regulator has already been enabled or has already been
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* disabled
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* -EACCES if there is no possibility to enable/disable the regulator
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* -ve on different error situation
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*/
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int regulator_common_set_enable(const struct udevice *dev,
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struct regulator_common_plat *plat, bool enable);
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#endif /* _REGULATOR_COMMON_H */
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