regulator: max8952: Convert to use GPIO descriptors

This finalizes the descriptor conversion of the MAX8952 driver
by letting the VID0 and VID1 GPIOs be fetched from descriptors.

Both VID0 and VID1

regulator: max8952: Convert to use GPIO descriptors

This finalizes the descriptor conversion of the MAX8952 driver
by letting the VID0 and VID1 GPIOs be fetched from descriptors.

Both VID0 and VID1 must be supplied for the VID selection to work,
I add some code to preserve the semantics that if only one of
the two VID gpios is supplied, it will be initialized to low.
This might be a bit overzealous, but I want to preserve any
implicit semantics.

This is currently only used by device tree in-kernel but it is
still also possible to supply the same GPIOs using a machine
descriptor table if a board file is used.

Ideally this should be phased over to using gpio-regulator.c
that does the same thing, but it might require some refactoring
and needs testing on real hardware.

Cc: Tomasz Figa <[email protected]>
Cc: MyungJoo Ham <[email protected]>
Cc: Marek Szyprowski <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>
Signed-off-by: Mark Brown <[email protected]>

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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156

Based on 1 normalized pattern(s):

this program is free software you can redistribute it and or modify
it under the terms of th

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156

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 this program is distributed in the
hope that it will be useful but without any warranty without even
the implied warranty of merchantability or fitness for a particular
purpose see the gnu general public license for more details you
should have received a copy of the gnu general public license along
with this program if not write to the free software foundation inc
59 temple place suite 330 boston ma 02111 1307 usa

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1334 file(s).

Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Allison Randal <[email protected]>
Reviewed-by: Richard Fontana <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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regulator: max8952: Pass descriptor instead of GPIO number

Instead of passing a global GPIO number for the enable GPIO, pass
a descriptor looked up with the standard devm_gpiod_get_optional()
call.

regulator: max8952: Pass descriptor instead of GPIO number

Instead of passing a global GPIO number for the enable GPIO, pass
a descriptor looked up with the standard devm_gpiod_get_optional()
call.

All users of this regulator use device tree so the transition is
pretty smooth.

Signed-off-by: Linus Walleij <[email protected]>
Signed-off-by: Mark Brown <[email protected]>

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regulator: max8952: Add Device Tree support

This patch adds Device Tree support to max8952 regulator driver.

Signed-off-by: Tomasz Figa <[email protected]>
Signed-off-by: Kyungmin Park <kyungmin.p

regulator: max8952: Add Device Tree support

This patch adds Device Tree support to max8952 regulator driver.

Signed-off-by: Tomasz Figa <[email protected]>
Signed-off-by: Kyungmin Park <[email protected]>
Signed-off-by: Mark Brown <[email protected]>

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regulator: max8952: Separate constraints from platform data struct

This patch modifies platform data structure of max8952 driver to
use pointer to regulator_init_data struct instead of embedding it.

regulator: max8952: Separate constraints from platform data struct

This patch modifies platform data structure of max8952 driver to
use pointer to regulator_init_data struct instead of embedding it.

This is a prerequisite for adding Device Tree support for the driver.

Signed-off-by: Tomasz Figa <[email protected]>
Signed-off-by: Kyungmin Park <[email protected]>
Signed-off-by: Mark Brown <[email protected]>

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MAX8952 PMIC Driver Initial Release

MAX8952 PMIC is used to provide voltage output between 770mV - 1400mV
with DVS support. In this initial release, users can set voltages for
four DVS modes, RAMP d

MAX8952 PMIC Driver Initial Release

MAX8952 PMIC is used to provide voltage output between 770mV - 1400mV
with DVS support. In this initial release, users can set voltages for
four DVS modes, RAMP delay values, and SYNC frequency.
Controlling FPWM/SYNC_MODE/Pull-Down/Ramp Modes and reading CHIP_ID
is not supported in this release.

If GPIO of EN is not valid in platform data, the driver assumes that it
is always-on. If GPIO of VID0 or VID1 is invalid, the driver pulls down
VID0 and VID1 to fix DVS mode as 0 and disables DVS support.

We assume that V_OUT is capable to provide every voltage from 770mV to
1.40V in 10mV steps although the data sheet has some ambiguity on it.

Signed-off-by: MyungJoo Ham <[email protected]>
Signed-off-by: Kyungmin Park <[email protected]>
Acked-by: Mark Brown <[email protected]>
--
v2:
- Style correction
- Can accept platform_data with invalid GPIOs
- Removed unnecessary features
- Improved error handling
Signed-off-by: Liam Girdwood <[email protected]>

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