treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

Based on 2 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 version 2 as
published by the free software foundation

this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation #

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-only

has been chosen to replace the boilerplate/reference in 4122 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Enrico Weigelt <info@metux.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

ASoC: max98504: Add max98504 speaker amplifier driver

This patch adds driver for the MAX98504 speaker amplifier. The MAX98504
is a high efficiency mono class D amplifier that features an integrated
boost converter with voltage and current sensing ADCs for Dynamic Speaker
Management.
This driver does not include support for the I2S DAI, as we wouldn't be
able to test such code in a hardware configuration where the amplifier
has only wired the analogue input.

Signed-off-by: Inha Song <ideal.song@samsung.com>
[k.kozlowski: rebased on 4.1]
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
[s.nawrocki: removed unused macro definitions, rewrote regulator supply
related parts, rewrote regmap configuration code, added support for speaker
enable and global chip enable through DAPM, rewritten as component driver,
added PDM DAI definition and TDM callbacks for PDM channels configuration]
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
--
Changes since v2:
- added parsing of the VBAT brownout DT properties,
- removed MAX98504_REG_SPEAKER_SOURCE_SELECT register initialization,
- removed unused macro definitions.

Changes since v1:
- none.

Changes since initial version:
- added regulator supply handling,
- added DAPM widges for speaker source selection,
- added PDM DAI definition and TDM callbacks for setting up active
PDM Tx channels and I/V sense ADC data mapping,
- removed all optional DT properties, added regulator supply properties
in the DT binding.
Signed-off-by: Mark Brown <broonie@kernel.org>