Probing of regulators can be a slow operation and can contribute to
slower boot times. This is especially true if a regulator is turned on
at probe time (with regulator-boot-on or regulator-always-on) and the
regulator requires delays (off-on-time, ramp time, etc).
While the overall kernel is not ready to switch to async probe by
default, as per the discussion on the mailing lists [1] it is believed
that the regulator subsystem is in good shape and we can move
regulator drivers over wholesale. There is no way to just magically
opt in all regulators (regulators are just normal drivers like
platform_driver), so we set PROBE_PREFER_ASYNCHRONOUS for all
regulators found in 'drivers/regulator' individually.
Given the number of drivers touched and the impossibility to test this
ahead of time, it wouldn't be shocking at all if this caused a
regression for someone. If there is a regression caused by this patch,
it's likely to be one of the cases talked about in [1]. As a "quick
fix", drivers involved in the regression could be fixed by changing
them to PROBE_FORCE_SYNCHRONOUS. That being said, the correct fix
would be to directly fix the problem that caused the issue with async
probe.
The approach here follows a similar approach that was used for the mmc
subsystem several years ago [2]. In fact, I ran nearly the same python
script to auto-generate the changes. The only thing I changed was to
search for "i2c_driver", "spmi_driver", and "spi_driver" in addition
to "platform_driver".
[1] https://lore.kernel.org/r/06db017f-e985-4434-8d1d-02ca2100cca0@sirena.org.uk
[2] https://lore.kernel.org/r/20200903232441.2694866-1-dianders@chromium.org/
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20230316125351.1.I2a4677392a38db5758dee0788b2cea5872562a82@changeid
Signed-off-by: Mark Brown <broonie@kernel.org>
Change the regulator helpers to use common linear_ranges code.
Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Acked-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Link: https://lore.kernel.org/r/64f01d5e381b8631a271616b7790f9d5640974fb.1588944082.git.matti.vaittinen@fi.rohmeurope.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 of the license or at
your option any later version
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-or-later
has been chosen to replace the boilerplate/reference in 3029 file(s).
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Use regulator core's simplified DT parsing code to simply the driver
implementation.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Current implementation missed the case BCM590XX_REG_VSR, so
bcm590xx_get_enable_register() returns 0 when id is BCM590XX_REG_VSR.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Declare regulator_ops structure as const as it is only stored in the ops
field of a regulator_desc structure. This field is of type const, so
regulator_ops structures having this property can be made const too.
File size before: drivers/regulator/bcm590xx-regulator.o
text data bss dec hex filename
1807 3360 0 5167 142f regulator/bcm590xx-regulator.o
File size after: drivers/regulator/bcm590xx-regulator.o
text data bss dec hex filename
2575 2592 0 5167 142f regulator/bcm590xx-regulator.o
Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
It's clearly a typo error that just creates a null statement so remove it.
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The vbus regulator was not getting its name set. This results
in the sysfs entry being empty. The lack of a bcm590xx_regs[]
table entry also upsets Coverity runs. Add the table entry
so the name gets set properly.
Signed-off-by: Graham Williams <graham.williams@linaro.org>
Acked-by: Matt Porter <mporter@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
The site-specific OOM messages are unnecessary, because they
duplicate the MM subsystem generic OOM message.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Matt Porter <mporter@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
The bcm590xx MFD driver now exposes a secondary regmap descriptor
making the registers for regulators on the secondary I2C slave address
available. Add support for GPLDO1-6 and VBUS regulators found within
this register range.
Signed-off-by: Matt Porter <mporter@linaro.org>
Acked-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Fix the macro used to define linear range regulators to include the
number of voltages.
Signed-off-by: Tim Kryger <tim.kryger@linaro.org>
Acked-by: Matt Porter <mporter@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
The **rdev of 'struct bcm590xx_reg' isn't used anywhere in the driver so
remove it.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Matt Porter <mporter@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
Add a regulator driver for the BCM590xx PMU voltage regulators.
The driver supports LDOs and DCDCs in normal mode only. There is
no support for low-power mode or power sequencing.
Signed-off-by: Matt Porter <mporter@linaro.org>
Reviewed-by: Tim Kryger <tim.kryger@linaro.org>
Reviewed-by: Markus Mayer <markus.mayer@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
Douglas Anderson