Add SPDX license identifiers to all Make/Kconfig files which:
- Have no license information of any form
These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:
GPL-2.0-only
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
I2S controller on EP93xx seems to have undocumented HW issue. According to
"EP93xx User’s Guide", controller can handle underflow and either transmit
last sample or zeroes in such case until FIFO is filled again. In reality
undeflow conditions seem to confuse internal state machine from time to
time and the whole stream gets shifted by one byte (as captured by logic
analyser on the I2S outputs). One could only hear noise instead of original
stream and this continues until the FIFO is disabled and enabled again.
Work this around by watching underflow interrupt and resetting I2S TX
channel + fill FIFO with zero samples until DMA catches up again. This is
a nasty workaround, but it works. Hence, Kconfig option to disable it in
case of problems.
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The tlv320aic23 codec is selected by the ep93xx snapper platform,
which are missing a dependency on I2C, and that can result in this
build error, as found during randconfig builds:
.../codecs/tlv320aic23-i2c.c: In function 'tlv320aic23_i2c_probe':
.../codecs/tlv320aic23-i2c.c:27:2: error: implicit declaration of function 'i2c_check_functionality' [-Werror=implicit-function-declaration]
if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
^
This adds the missing dependency.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
Currently the cs4271 driver depends on SND_SOC_I2C_AND_SPI.
So the driver cannot be built as built-in if CONFIG_I2C=m.
Split SPI and I2C code into different modules to avoid this issue.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Brian Austin <brian.austin@cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Now that AIC23 supports two control interfaces all existing I2C users
should select I2C variant.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Configuration for Cirrus Logic audio support is included only
if SND_SOC symbol selected, so no reason to check it once more.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Mark Brown <broonie@linaro.org>
The core support for ep93xx (currently only the DMA driver) does not
depend on the architecture at all and everything else has more strict
dependencies so enable compile test builds for improved build coverage.
Signed-off-by: Mark Brown <broonie@linaro.org>
Use the generic dmaengine PCM driver instead of a custom implementation.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This patch is to rename the directory "ep93xx" in "cirrus".
Name more accurately reflects the manufacturer and allows to add
drivers not only for architecture ep93xx in this directory.
Patch not contain any functional changes.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Thomas Gleixner