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path: root/sound/soc/codecs/nau8540.c
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2019-06-19treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500Thomas Gleixner1-4/+1
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>
2018-11-29ASoC: au8540: use 64-bit arithmetic instead of 32-bitYoung_X1-1/+1
Add suffix ULL to constant 256 in order to give the compiler complete information about the proper arithmetic to use. Notice that such constant is used in a context that expects an expression of type u64 (64 bits, unsigned) and the following expression is currently being evaluated using 32-bit arithmetic: 256 * fs * 2 * mclk_src_scaling[i].param Signed-off-by: Young_X <YangX92@hotmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2018-08-01ASoC: nau8540: remove redundant variable osrateColin Ian King1-3/+0
Variable osrate is being assigned but is never used hence it is redundant and can be removed. Cleans up clang warning: warning: variable 'osrate' set but not used [-Wunused-but-set-variable] Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2018-02-12ASoC: nau8540: replace codec to componentKuninori Morimoto1-43/+36
Now we can replace Codec to Component. Let's do it. Note: xxx_codec_xxx() -> xxx_component_xxx() .idle_bias_off = 0 -> .idle_bias_on = 1 .ignore_pmdown_time = 0 -> .use_pmdown_time = 1 - -> .endianness = 1 - -> .non_legacy_dai_naming = 1 Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-11-16ASoC: nau8540: improve FLL performanceJohn Hsu1-7/+14
Add these parameters to improve the FLL performance. The comments show as follows: (1)ICTRL_LATCH: FLL DSP speed capability control When FLL running at high frequency with long decimal number, DSP needs to operate at high speed. FLL DSP can optimize between performance and power consumption by ICTRL_LATCH.(111 has highest power consumption.) The default setting can be used to reduce power. (2)CUTOFF500: loop filter cutoff frequency at 500Khz It will give the best FLL performance but highest power consumption to enable the cutoff frequency. FLL Loop Filter enable to reduce FLL output noise, especially,(DCO frequency)/(FLL input reference frequency) is not a integer. (3)GAIN_ERR: FLL gain error correction threshold setting The threshold is comparison between DCO and target frequency. The value 1111 has the most sensitive threshold, that is, 1111 can have the most accurate DCO to target frequency. However, the gain error setting conditionally and inversely depends on FLL input reference clock rate. Higher FLL reference input frequency can only set lower gain error, such as 0000 for input reference from MCLK=12.288Mhz. On the other side, if FLL reference input is from Frame Sync, 48KHz, higher error gain can apply such as 1111. Signed-off-by: John Hsu <KCHSU0@nuvoton.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-11-07ASoC: nau8540: fix the record pop noiseJohn Hsu1-8/+39
When the record starts, the driver turns on MICBIAS and the voltage is pulled up for an instant. If the receiver starts to capture the signal between the instant, there is an pop noise in the stream beginning. To avoid the pop noise, the driver makes a delay in the sequence. After MICBIAS powered up, the driver waits 300 ms for the voltage going down. Then turns on the ADC output, and sends signal to receiver. The pop noise can be erased. Signed-off-by: John Hsu <KCHSU0@nuvoton.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-11-07ASoC: nau8540: PGA short to groundJohn Hsu1-0/+7
Change channel PGA input mode selection for better recording quality. The patch shorts the inputs to ground with 12kOhm differentially terminated. Signed-off-by: John Hsu <KCHSU0@nuvoton.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-11-07ASoC: nau8540: reset state machine for channel phase syncJohn Hsu1-3/+20
The four channel ADCs in NAU85L40 have difference control registers, it is hard to synchronous these four channels without correct sequence. The phase difference will not be a constant and not to conjecture easily. It may be 2.55 degree, or more ,or less. Intended to prevent phase difference of channels, the solution as follows: (1)Channel_Sync need to be enabled. (2)Do soft reset without affecting register when recording done. Signed-off-by: John Hsu <KCHSU0@nuvoton.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-08-10ASoC: codecs: add const to snd_soc_codec_driver structuresBhumika Goyal1-1/+1
Declare snd_soc_codec_driver structures as const as they are only passed as an argument to the function snd_soc_register_codec. This argument is of type const, so declare the structures with this property as const. In file codecs/sn95031.c, snd_soc_codec_driver structure is also used in a copy operation along with getting passed to snd_soc_register_codec. So, it can be made const too. Done using Coccinelle: @match disable optional_qualifier@ identifier s; position p; @@ static struct snd_soc_codec_driver s@p={...}; @good1@ identifier match.s; position p; @@ snd_soc_register_codec(...,&s@p,...) @bad@ identifier match.s; position p!={match.p,good1.p}; @@ s@p @depends on !bad disable optional_qualifier@ identifier match.s; @@ static +const struct snd_soc_codec_driver s={...}; Signed-off-by: Bhumika Goyal <bhumirks@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-04-18ASoC: nau8540: fix tab conversion problemJohn Hsu1-612/+612
Fix the tab converting to space problem. Signed-off-by: John Hsu <KCHSU0@nuvoton.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-02-04ASoC: nau8540: new codec driverJohn Hsu1-0/+835
Add codec driver of NAU85L40 Signed-off-by: John Hsu <KCHSU0@nuvoton.com> Signed-off-by: Mark Brown <broonie@kernel.org>