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311 lines
7.3 KiB
311 lines
7.3 KiB
// SPDX-License-Identifier: (GPL-2.0 OR MIT) |
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// |
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// Copyright (c) 2018 BayLibre, SAS. |
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// Author: Jerome Brunet <[email protected]> |
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#include <linux/gpio/consumer.h> |
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#include <linux/of_platform.h> |
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#include <linux/module.h> |
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#include <sound/soc.h> |
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struct es7241_clock_mode { |
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unsigned int rate_min; |
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unsigned int rate_max; |
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unsigned int *slv_mfs; |
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unsigned int slv_mfs_num; |
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unsigned int mst_mfs; |
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unsigned int mst_m0:1; |
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unsigned int mst_m1:1; |
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}; |
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struct es7241_chip { |
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const struct es7241_clock_mode *modes; |
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unsigned int mode_num; |
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}; |
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struct es7241_data { |
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struct gpio_desc *reset; |
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struct gpio_desc *m0; |
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struct gpio_desc *m1; |
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unsigned int fmt; |
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unsigned int mclk; |
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bool is_consumer; |
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const struct es7241_chip *chip; |
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}; |
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static void es7241_set_mode(struct es7241_data *priv, int m0, int m1) |
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{ |
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/* put the device in reset */ |
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gpiod_set_value_cansleep(priv->reset, 0); |
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/* set the mode */ |
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gpiod_set_value_cansleep(priv->m0, m0); |
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gpiod_set_value_cansleep(priv->m1, m1); |
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/* take the device out of reset - datasheet does not specify a delay */ |
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gpiod_set_value_cansleep(priv->reset, 1); |
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} |
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static int es7241_set_consumer_mode(struct es7241_data *priv, |
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const struct es7241_clock_mode *mode, |
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unsigned int mfs) |
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{ |
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int j; |
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if (!mfs) |
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goto out_ok; |
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for (j = 0; j < mode->slv_mfs_num; j++) { |
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if (mode->slv_mfs[j] == mfs) |
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goto out_ok; |
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} |
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return -EINVAL; |
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out_ok: |
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es7241_set_mode(priv, 1, 1); |
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return 0; |
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} |
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static int es7241_set_provider_mode(struct es7241_data *priv, |
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const struct es7241_clock_mode *mode, |
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unsigned int mfs) |
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{ |
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/* |
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* We can't really set clock ratio, if the mclk/lrclk is different |
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* from what we provide, then error out |
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*/ |
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if (mfs && mfs != mode->mst_mfs) |
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return -EINVAL; |
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es7241_set_mode(priv, mode->mst_m0, mode->mst_m1); |
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return 0; |
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} |
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static int es7241_hw_params(struct snd_pcm_substream *substream, |
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struct snd_pcm_hw_params *params, |
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struct snd_soc_dai *dai) |
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{ |
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struct es7241_data *priv = snd_soc_dai_get_drvdata(dai); |
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unsigned int rate = params_rate(params); |
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unsigned int mfs = priv->mclk / rate; |
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int i; |
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for (i = 0; i < priv->chip->mode_num; i++) { |
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const struct es7241_clock_mode *mode = &priv->chip->modes[i]; |
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if (rate < mode->rate_min || rate >= mode->rate_max) |
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continue; |
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if (priv->is_consumer) |
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return es7241_set_consumer_mode(priv, mode, mfs); |
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else |
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return es7241_set_provider_mode(priv, mode, mfs); |
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} |
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/* should not happen */ |
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dev_err(dai->dev, "unsupported rate: %u\n", rate); |
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return -EINVAL; |
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} |
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static int es7241_set_sysclk(struct snd_soc_dai *dai, int clk_id, |
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unsigned int freq, int dir) |
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{ |
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struct es7241_data *priv = snd_soc_dai_get_drvdata(dai); |
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if (dir == SND_SOC_CLOCK_IN && clk_id == 0) { |
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priv->mclk = freq; |
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return 0; |
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} |
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return -ENOTSUPP; |
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} |
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static int es7241_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) |
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{ |
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struct es7241_data *priv = snd_soc_dai_get_drvdata(dai); |
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if ((fmt & SND_SOC_DAIFMT_INV_MASK) != SND_SOC_DAIFMT_NB_NF) { |
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dev_err(dai->dev, "Unsupported dai clock inversion\n"); |
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return -EINVAL; |
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} |
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if ((fmt & SND_SOC_DAIFMT_FORMAT_MASK) != priv->fmt) { |
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dev_err(dai->dev, "Invalid dai format\n"); |
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return -EINVAL; |
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} |
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switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { |
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case SND_SOC_DAIFMT_CBC_CFC: |
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priv->is_consumer = true; |
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break; |
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case SND_SOC_DAIFMT_CBP_CFP: |
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priv->is_consumer = false; |
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break; |
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default: |
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dev_err(dai->dev, "Unsupported clock configuration\n"); |
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return -EINVAL; |
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} |
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return 0; |
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} |
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static const struct snd_soc_dai_ops es7241_dai_ops = { |
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.set_fmt = es7241_set_fmt, |
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.hw_params = es7241_hw_params, |
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.set_sysclk = es7241_set_sysclk, |
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}; |
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static struct snd_soc_dai_driver es7241_dai = { |
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.name = "es7241-hifi", |
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.capture = { |
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.stream_name = "Capture", |
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.channels_min = 2, |
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.channels_max = 2, |
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.rates = SNDRV_PCM_RATE_8000_192000, |
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.formats = (SNDRV_PCM_FMTBIT_S16_LE | |
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SNDRV_PCM_FMTBIT_S24_3LE | |
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SNDRV_PCM_FMTBIT_S24_LE), |
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}, |
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.ops = &es7241_dai_ops, |
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}; |
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static const struct es7241_clock_mode es7241_modes[] = { |
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{ |
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/* Single speed mode */ |
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.rate_min = 8000, |
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.rate_max = 50000, |
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.slv_mfs = (unsigned int[]) { 256, 384, 512, 768, 1024 }, |
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.slv_mfs_num = 5, |
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.mst_mfs = 256, |
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.mst_m0 = 0, |
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.mst_m1 = 0, |
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}, { |
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/* Double speed mode */ |
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.rate_min = 50000, |
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.rate_max = 100000, |
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.slv_mfs = (unsigned int[]) { 128, 192 }, |
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.slv_mfs_num = 2, |
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.mst_mfs = 128, |
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.mst_m0 = 1, |
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.mst_m1 = 0, |
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}, { |
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/* Quad speed mode */ |
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.rate_min = 100000, |
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.rate_max = 200000, |
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.slv_mfs = (unsigned int[]) { 64 }, |
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.slv_mfs_num = 1, |
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.mst_mfs = 64, |
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.mst_m0 = 0, |
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.mst_m1 = 1, |
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}, |
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}; |
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static const struct es7241_chip es7241_chip __maybe_unused = { |
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.modes = es7241_modes, |
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.mode_num = ARRAY_SIZE(es7241_modes), |
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}; |
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static const struct snd_soc_dapm_widget es7241_dapm_widgets[] = { |
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SND_SOC_DAPM_INPUT("AINL"), |
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SND_SOC_DAPM_INPUT("AINR"), |
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SND_SOC_DAPM_DAC("ADC", "Capture", SND_SOC_NOPM, 0, 0), |
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SND_SOC_DAPM_REGULATOR_SUPPLY("VDDP", 0, 0), |
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SND_SOC_DAPM_REGULATOR_SUPPLY("VDDD", 0, 0), |
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SND_SOC_DAPM_REGULATOR_SUPPLY("VDDA", 0, 0), |
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}; |
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static const struct snd_soc_dapm_route es7241_dapm_routes[] = { |
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{ "ADC", NULL, "AINL", }, |
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{ "ADC", NULL, "AINR", }, |
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{ "ADC", NULL, "VDDA", }, |
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{ "Capture", NULL, "VDDP", }, |
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{ "Capture", NULL, "VDDD", }, |
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}; |
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static const struct snd_soc_component_driver es7241_component_driver = { |
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.dapm_widgets = es7241_dapm_widgets, |
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.num_dapm_widgets = ARRAY_SIZE(es7241_dapm_widgets), |
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.dapm_routes = es7241_dapm_routes, |
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.num_dapm_routes = ARRAY_SIZE(es7241_dapm_routes), |
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.idle_bias_on = 1, |
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.endianness = 1, |
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}; |
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static void es7241_parse_fmt(struct device *dev, struct es7241_data *priv) |
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{ |
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bool is_leftj; |
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/* |
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* The format is given by a pull resistor on the SDOUT pin: |
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* pull-up for i2s, pull-down for left justified. |
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*/ |
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is_leftj = of_property_read_bool(dev->of_node, |
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"everest,sdout-pull-down"); |
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if (is_leftj) |
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priv->fmt = SND_SOC_DAIFMT_LEFT_J; |
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else |
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priv->fmt = SND_SOC_DAIFMT_I2S; |
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} |
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static int es7241_probe(struct platform_device *pdev) |
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{ |
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struct device *dev = &pdev->dev; |
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struct es7241_data *priv; |
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); |
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if (!priv) |
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return -ENOMEM; |
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platform_set_drvdata(pdev, priv); |
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priv->chip = of_device_get_match_data(dev); |
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if (!priv->chip) { |
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dev_err(dev, "failed to match device\n"); |
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return -ENODEV; |
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} |
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es7241_parse_fmt(dev, priv); |
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priv->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW); |
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if (IS_ERR(priv->reset)) |
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return dev_err_probe(dev, PTR_ERR(priv->reset), |
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"Failed to get 'reset' gpio"); |
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priv->m0 = devm_gpiod_get_optional(dev, "m0", GPIOD_OUT_LOW); |
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if (IS_ERR(priv->m0)) |
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return dev_err_probe(dev, PTR_ERR(priv->m0), |
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"Failed to get 'm0' gpio"); |
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priv->m1 = devm_gpiod_get_optional(dev, "m1", GPIOD_OUT_LOW); |
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if (IS_ERR(priv->m1)) |
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return dev_err_probe(dev, PTR_ERR(priv->m1), |
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"Failed to get 'm1' gpio"); |
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return devm_snd_soc_register_component(&pdev->dev, |
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&es7241_component_driver, |
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&es7241_dai, 1); |
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} |
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#ifdef CONFIG_OF |
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static const struct of_device_id es7241_ids[] = { |
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{ .compatible = "everest,es7241", .data = &es7241_chip }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(of, es7241_ids); |
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#endif |
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static struct platform_driver es7241_driver = { |
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.driver = { |
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.name = "es7241", |
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.of_match_table = of_match_ptr(es7241_ids), |
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}, |
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.probe = es7241_probe, |
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}; |
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module_platform_driver(es7241_driver); |
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MODULE_DESCRIPTION("ASoC ES7241 audio codec driver"); |
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MODULE_AUTHOR("Jerome Brunet <[email protected]>"); |
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MODULE_LICENSE("GPL");
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