/* * NXP AMIX ALSA SoC Digital Audio Interface (DAI) driver * * Copyright 2017 NXP * * Author: Viorel Suman * * This file is licensed under the terms of the GNU General Public License * version 2. This program is licensed "as is" without any warranty of any * kind, whether express or implied. */ #include #include #include #include #include #include #include "fsl_amix.h" #define SOC_ENUM_SINGLE_S(xreg, xshift, xtexts) \ SOC_ENUM_SINGLE(xreg, xshift, ARRAY_SIZE(xtexts), xtexts) typedef int (*fsl_amix_state_handler)(struct snd_soc_component *comp, unsigned int *mask, unsigned int *ctr); static const char *tdm_sel[] = { "TDM1", "TDM2", }, *mode_sel[] = { "Disabled", "TDM1", "TDM2", "Mixed", }, *width_sel[] = { "16b", "18b", "20b", "24b", "32b", }, *pol_sel[] = { "Positive edge", "Negative edge", }, *endis_sel[] = { "Disabled", "Enabled", }, *updn_sel[] = { "Downward", "Upward", }, *mask_sel[] = { "Unmask", "Mask", }; static const struct soc_enum fsl_amix_enum[] = { /* FSL_AMIX_CTR enums */ SOC_ENUM_SINGLE_S(FSL_AMIX_CTR, FSL_AMIX_CTR_MIXCLK_SHIFT, tdm_sel), SOC_ENUM_SINGLE_S(FSL_AMIX_CTR, FSL_AMIX_CTR_OUTSRC_SHIFT, mode_sel), SOC_ENUM_SINGLE_S(FSL_AMIX_CTR, FSL_AMIX_CTR_OUTWIDTH_SHIFT, width_sel), SOC_ENUM_SINGLE_S(FSL_AMIX_CTR, FSL_AMIX_CTR_OUTCKPOL_SHIFT, pol_sel), SOC_ENUM_SINGLE_S(FSL_AMIX_CTR, FSL_AMIX_CTR_MASKRTDF_SHIFT, mask_sel), SOC_ENUM_SINGLE_S(FSL_AMIX_CTR, FSL_AMIX_CTR_MASKCKDF_SHIFT, mask_sel), SOC_ENUM_SINGLE_S(FSL_AMIX_CTR, FSL_AMIX_CTR_SYNCMODE_SHIFT, endis_sel), SOC_ENUM_SINGLE_S(FSL_AMIX_CTR, FSL_AMIX_CTR_SYNCSRC_SHIFT, tdm_sel), /* FSL_AMIX_ATCR0 enums */ SOC_ENUM_SINGLE_S(FSL_AMIX_ATCR0, 0, endis_sel), SOC_ENUM_SINGLE_S(FSL_AMIX_ATCR0, 1, updn_sel), /* FSL_AMIX_ATCR1 enums */ SOC_ENUM_SINGLE_S(FSL_AMIX_ATCR1, 0, endis_sel), SOC_ENUM_SINGLE_S(FSL_AMIX_ATCR1, 1, updn_sel), }; static int fsl_amix_state_dis_tdm1(struct snd_soc_component *comp, unsigned int *mask, unsigned int *ctr) { struct fsl_amix *priv = snd_soc_component_get_drvdata(comp); /* Enforce the proper TDM is started */ if (!(priv->tdms & BIT(0))) { dev_err(comp->dev, "DIS->TDM1: TDM1 is not started!\n"); return -EINVAL; } /* Set mix clock */ (*mask) |= FSL_AMIX_CTR_MIXCLK_MASK; (*ctr) |= FSL_AMIX_CTR_MIXCLK(0); return 0; } static int fsl_amix_state_dis_tdm2(struct snd_soc_component *comp, unsigned int *mask, unsigned int *ctr) { struct fsl_amix *priv = snd_soc_component_get_drvdata(comp); /* Enforce the proper TDM is started */ if (!(priv->tdms & BIT(1))) { dev_err(comp->dev, "DIS->TDM2: TDM2 is not started!\n"); return -EINVAL; } /* Set mix clock */ (*mask) |= FSL_AMIX_CTR_MIXCLK_MASK; (*ctr) |= FSL_AMIX_CTR_MIXCLK(1); return 0; } static int fsl_amix_state_tdm1_dis(struct snd_soc_component *comp, unsigned int *mask, unsigned int *ctr) { struct fsl_amix *priv = snd_soc_component_get_drvdata(comp); /* Enforce the proper TDM is started */ if (!(priv->tdms & BIT(0))) { dev_err(comp->dev, "TDM1->DIS: TDM1 is not started!\n"); return -EINVAL; } /* Keep mix clock unchanged */ return 0; } static int fsl_amix_state_tdm2_dis(struct snd_soc_component *comp, unsigned int *mask, unsigned int *ctr) { struct fsl_amix *priv = snd_soc_component_get_drvdata(comp); /* Enforce the proper TDM is started */ if (!(priv->tdms & BIT(1))) { dev_err(comp->dev, "TDM2->DIS: TDM2 is not started!\n"); return -EINVAL; } /* Keep mix clock unchanged */ return 0; } static int fsl_amix_state_dis_mix(struct snd_soc_component *comp, unsigned int *mask, unsigned int *ctr) { struct fsl_amix *priv = snd_soc_component_get_drvdata(comp); /* Enforce all TDMs are started */ if (priv->tdms != 3) { dev_err(comp->dev, "DIS->MIX: Please start both TDMs!\n"); return -EINVAL; } /* Keep mix clock unchanged */ return 0; } static int fsl_amix_state_tdm1_tdm2(struct snd_soc_component *comp, unsigned int *mask, unsigned int *ctr) { struct fsl_amix *priv = snd_soc_component_get_drvdata(comp); /* Enforce all TDMs are started */ if (priv->tdms != 3) { dev_err(comp->dev, "TDM1->TDM2: Please start both TDMs!\n"); return -EINVAL; } /* Set mix clock */ (*mask) |= FSL_AMIX_CTR_MIXCLK_MASK; (*ctr) |= FSL_AMIX_CTR_MIXCLK(1); return 0; } static int fsl_amix_state_tdm2_tdm1(struct snd_soc_component *comp, unsigned int *mask, unsigned int *ctr) { struct fsl_amix *priv = snd_soc_component_get_drvdata(comp); /* Enforce all TDMs are started */ if (priv->tdms != 3) { dev_err(comp->dev, "TDM2->TDM1: Please start both TDMs!\n"); return -EINVAL; } /* Set mix clock */ (*mask) |= FSL_AMIX_CTR_MIXCLK_MASK; (*ctr) |= FSL_AMIX_CTR_MIXCLK(0); return 0; } static int fsl_amix_state_tdm1_mix(struct snd_soc_component *comp, unsigned int *mask, unsigned int *ctr) { struct fsl_amix *priv = snd_soc_component_get_drvdata(comp); /* Enforce all TDMs are started */ if (priv->tdms != 3) { dev_err(comp->dev, "TDM1->MIX: Please start both TDMs!\n"); return -EINVAL; } /* Keep mix clock unchanged */ return 0; } static int fsl_amix_state_tdm2_mix(struct snd_soc_component *comp, unsigned int *mask, unsigned int *ctr) { struct fsl_amix *priv = snd_soc_component_get_drvdata(comp); /* Enforce all TDMs are started */ if (priv->tdms != 3) { dev_err(comp->dev, "TDM2->MIX: Please start both TDMs!\n"); return -EINVAL; } /* Keep mix clock unchanged */ return 0; } static int fsl_amix_state_mix_tdm1(struct snd_soc_component *comp, unsigned int *mask, unsigned int *ctr) { struct fsl_amix *priv = snd_soc_component_get_drvdata(comp); /* Enforce all TDMs are started */ if (priv->tdms != 3) { dev_err(comp->dev, "MIX->TDM1: Please start both TDMs!\n"); return -EINVAL; } /* Set mix clock */ (*mask) |= FSL_AMIX_CTR_MIXCLK_MASK; (*ctr) |= FSL_AMIX_CTR_MIXCLK(0); return 0; } static int fsl_amix_state_mix_tdm2(struct snd_soc_component *comp, unsigned int *mask, unsigned int *ctr) { struct fsl_amix *priv = snd_soc_component_get_drvdata(comp); /* Enforce all TDMs are started */ if (priv->tdms != 3) { dev_err(comp->dev, "MIX->TDM2: Please start both TDMs!\n"); return -EINVAL; } /* Set mix clock */ (*mask) |= FSL_AMIX_CTR_MIXCLK_MASK; (*ctr) |= FSL_AMIX_CTR_MIXCLK(1); return 0; } static int fsl_amix_state_mix_dis(struct snd_soc_component *comp, unsigned int *mask, unsigned int *ctr) { struct fsl_amix *priv = snd_soc_component_get_drvdata(comp); /* Enforce all TDMs are started */ if (priv->tdms != 3) { dev_err(comp->dev, "MIX->DIS: Please start both TDMs!\n"); return -EINVAL; } /* Keep mix clock unchanged */ return 0; } static const fsl_amix_state_handler state_machine[4][4] = { /* From Disabled */ { 0, /* To Disabled, do nothing */ fsl_amix_state_dis_tdm1, /* To TDM1*/ fsl_amix_state_dis_tdm2, /* To TDM2 */ fsl_amix_state_dis_mix /* To Mixed */ }, /* From TDM1 */ { fsl_amix_state_tdm1_dis, /* To Disabled */ 0, /* To TDM1, do nothing */ fsl_amix_state_tdm1_tdm2, /* To TDM2 */ fsl_amix_state_tdm1_mix /* To Mixed */ }, /* From TDM2 */ { fsl_amix_state_tdm2_dis, /* To Disabled */ fsl_amix_state_tdm2_tdm1, /* To TDM1 */ 0, /* To TDM2, do nothing */ fsl_amix_state_tdm2_mix /* To Mixed */ }, /* From Mixed */ { fsl_amix_state_mix_dis, /* To Disabled */ fsl_amix_state_mix_tdm1, /* To TDM1 */ fsl_amix_state_mix_tdm2, /* To TDM2 */ 0 /* To Mixed, do nothing */ } }; static int fsl_amix_put_mix_clk_src(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_component *comp = snd_kcontrol_chip(kcontrol); struct fsl_amix *priv = snd_soc_component_get_drvdata(comp); struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; unsigned int *item = ucontrol->value.enumerated.item; unsigned int reg_val, val, mix_clk; int ret = 0; /* Get current state */ ret = snd_soc_component_read(comp, FSL_AMIX_CTR, ®_val); if (ret) return ret; mix_clk = reg_val & 1; val = snd_soc_enum_item_to_val(e, item[0]); dev_dbg(comp->dev, "[%s]: TDMs=x%08x, val=x%08x\n", __func__, priv->tdms, val); /** * Ensure the current selected mixer clock is available * for configuration propagation */ if (!(priv->tdms & BIT(mix_clk))) { dev_err(comp->dev, "MIXCLK: A started TDM%d is required " "for configuration propagation!\n", mix_clk + 1); return -EINVAL; } if (!(priv->tdms & BIT(val))) { dev_err(comp->dev, "The selected clock source has " "no TDM%d enabled!\n", val + 1); return -EINVAL; } return snd_soc_put_enum_double(kcontrol, ucontrol); } static int fsl_amix_put_out_src(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_component *comp = snd_kcontrol_chip(kcontrol); struct fsl_amix *priv = snd_soc_component_get_drvdata(comp); struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; unsigned int *item = ucontrol->value.enumerated.item; u32 out_src, mix_clk; unsigned int reg_val, val, mask = 0, ctr = 0; int ret = 0; /* Get current state */ ret = snd_soc_component_read(comp, FSL_AMIX_CTR, ®_val); if (ret) return ret; /* "From" state */ out_src = ((reg_val & FSL_AMIX_CTR_OUTSRC_MASK) >> FSL_AMIX_CTR_OUTSRC_SHIFT); mix_clk = reg_val & 1; /* "To" state */ val = snd_soc_enum_item_to_val(e, item[0]); dev_dbg(comp->dev, "[%s]: TDMs=x%08x, val=x%08x\n", __func__, priv->tdms, val); /* Check if state is changing ... */ if (!state_machine[out_src][val]) return 0; /** * Ensure the current selected mixer clock is available * for configuration propagation */ if (!(priv->tdms & BIT(mix_clk))) { dev_err(comp->dev, "MIXCLK: A started TDM%d is required " "for configuration propagation!\n", mix_clk + 1); return -EINVAL; } /* Check state transition constraints */ ret = state_machine[out_src][val](comp, &mask, &ctr); if (ret) return ret; /* Complete transition to new state */ mask |= FSL_AMIX_CTR_OUTSRC_MASK; ctr |= FSL_AMIX_CTR_OUTSRC(val); return snd_soc_component_update_bits(comp, FSL_AMIX_CTR, mask, ctr); } static const struct snd_kcontrol_new fsl_amix_snd_controls[] = { /* FSL_AMIX_CTR controls */ SOC_ENUM_EXT("Mixing Clock Source", fsl_amix_enum[0], snd_soc_get_enum_double, fsl_amix_put_mix_clk_src), SOC_ENUM_EXT("Output Source", fsl_amix_enum[1], snd_soc_get_enum_double, fsl_amix_put_out_src), SOC_ENUM("Output Width", fsl_amix_enum[2]), SOC_ENUM("Output Clock Polarity", fsl_amix_enum[3]), SOC_ENUM("Frame Rate Diff Error", fsl_amix_enum[4]), SOC_ENUM("Clock Freq Diff Error", fsl_amix_enum[5]), SOC_ENUM("Sync Mode Config", fsl_amix_enum[6]), SOC_ENUM("Sync Mode Clk Source", fsl_amix_enum[7]), /* TDM1 Attenuation controls */ SOC_ENUM("TDM1 Attenuation", fsl_amix_enum[8]), SOC_ENUM("TDM1 Attenuation Direction", fsl_amix_enum[9]), SOC_SINGLE("TDM1 Attenuation Step Divider", FSL_AMIX_ATCR0, 2, 0x00fff, 0), SOC_SINGLE("TDM1 Attenuation Initial Value", FSL_AMIX_ATIVAL0, 0, 0x3ffff, 0), SOC_SINGLE("TDM1 Attenuation Step Up Factor", FSL_AMIX_ATSTPUP0, 0, 0x3ffff, 0), SOC_SINGLE("TDM1 Attenuation Step Down Factor", FSL_AMIX_ATSTPDN0, 0, 0x3ffff, 0), SOC_SINGLE("TDM1 Attenuation Step Target", FSL_AMIX_ATSTPTGT0, 0, 0x3ffff, 0), /* TDM2 Attenuation controls */ SOC_ENUM("TDM2 Attenuation", fsl_amix_enum[10]), SOC_ENUM("TDM2 Attenuation Direction", fsl_amix_enum[11]), SOC_SINGLE("TDM2 Attenuation Step Divider", FSL_AMIX_ATCR1, 2, 0x00fff, 0), SOC_SINGLE("TDM2 Attenuation Initial Value", FSL_AMIX_ATIVAL1, 0, 0x3ffff, 0), SOC_SINGLE("TDM2 Attenuation Step Up Factor", FSL_AMIX_ATSTPUP1, 0, 0x3ffff, 0), SOC_SINGLE("TDM2 Attenuation Step Down Factor", FSL_AMIX_ATSTPDN1, 0, 0x3ffff, 0), SOC_SINGLE("TDM2 Attenuation Step Target", FSL_AMIX_ATSTPTGT1, 0, 0x3ffff, 0), }; static int fsl_amix_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) { struct fsl_amix *priv = snd_soc_dai_get_drvdata(dai); u32 mask = 0, ctr = 0; /* AMIX is working in DSP_A format only */ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_DSP_A: break; default: return -EINVAL; } /* For playback the AMIX is slave, and for record is master */ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { case SND_SOC_DAIFMT_CBM_CFM: case SND_SOC_DAIFMT_CBS_CFS: break; default: return -EINVAL; } switch (fmt & SND_SOC_DAIFMT_INV_MASK) { case SND_SOC_DAIFMT_IB_NF: /* Output data will be written on positive edge of the clock */ ctr |= FSL_AMIX_CTR_OUTCKPOL(0); break; case SND_SOC_DAIFMT_NB_NF: /* Output data will be written on negative edge of the clock */ ctr |= FSL_AMIX_CTR_OUTCKPOL(1); break; default: return -EINVAL; } mask |= FSL_AMIX_CTR_OUTCKPOL_MASK; return regmap_update_bits(priv->regmap, FSL_AMIX_CTR, mask, ctr); } static int fsl_amix_dai_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *dai) { struct fsl_amix *priv = snd_soc_dai_get_drvdata(dai); /* Capture stream shall not be handled */ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) return 0; switch (cmd) { case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_RESUME: case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: priv->tdms |= BIT(dai->driver->id); break; case SNDRV_PCM_TRIGGER_STOP: case SNDRV_PCM_TRIGGER_SUSPEND: case SNDRV_PCM_TRIGGER_PAUSE_PUSH: priv->tdms &= ~BIT(dai->driver->id); break; default: return -EINVAL; } return 0; } static struct snd_soc_dai_ops fsl_amix_dai_ops = { .set_fmt = fsl_amix_dai_set_fmt, .trigger = fsl_amix_dai_trigger, }; static struct snd_soc_dai_driver fsl_amix_dai[] = { { .id = 0, .name = "amix-0", .playback = { .stream_name = "AMIX-Playback-0", .channels_min = 8, .channels_max = 8, .rate_min = 8000, .rate_max = 96000, .rates = SNDRV_PCM_RATE_8000_96000, .formats = FSL_AMIX_FORMATS, }, .capture = { .stream_name = "AMIX-Capture-0", .channels_min = 8, .channels_max = 8, .rate_min = 8000, .rate_max = 96000, .rates = SNDRV_PCM_RATE_8000_96000, .formats = FSL_AMIX_FORMATS, }, .ops = &fsl_amix_dai_ops, }, { .id = 1, .name = "amix-1", .playback = { .stream_name = "AMIX-Playback-1", .channels_min = 8, .channels_max = 8, .rate_min = 8000, .rate_max = 96000, .rates = SNDRV_PCM_RATE_8000_96000, .formats = FSL_AMIX_FORMATS, }, .capture = { .stream_name = "AMIX-Capture-1", .channels_min = 8, .channels_max = 8, .rate_min = 8000, .rate_max = 96000, .rates = SNDRV_PCM_RATE_8000_96000, .formats = FSL_AMIX_FORMATS, }, .ops = &fsl_amix_dai_ops, }, }; static const struct snd_soc_component_driver fsl_amix_component = { .name = "fsl-amix-dai", .controls = fsl_amix_snd_controls, .num_controls = ARRAY_SIZE(fsl_amix_snd_controls), }; static bool fsl_amix_readable_reg(struct device *dev, unsigned int reg) { switch (reg) { case FSL_AMIX_CTR: case FSL_AMIX_STR: case FSL_AMIX_ATCR0: case FSL_AMIX_ATIVAL0: case FSL_AMIX_ATSTPUP0: case FSL_AMIX_ATSTPDN0: case FSL_AMIX_ATSTPTGT0: case FSL_AMIX_ATTNVAL0: case FSL_AMIX_ATSTP0: case FSL_AMIX_ATCR1: case FSL_AMIX_ATIVAL1: case FSL_AMIX_ATSTPUP1: case FSL_AMIX_ATSTPDN1: case FSL_AMIX_ATSTPTGT1: case FSL_AMIX_ATTNVAL1: case FSL_AMIX_ATSTP1: return true; default: return false; } } static bool fsl_amix_writeable_reg(struct device *dev, unsigned int reg) { switch (reg) { case FSL_AMIX_CTR: case FSL_AMIX_ATCR0: case FSL_AMIX_ATIVAL0: case FSL_AMIX_ATSTPUP0: case FSL_AMIX_ATSTPDN0: case FSL_AMIX_ATSTPTGT0: case FSL_AMIX_ATCR1: case FSL_AMIX_ATIVAL1: case FSL_AMIX_ATSTPUP1: case FSL_AMIX_ATSTPDN1: case FSL_AMIX_ATSTPTGT1: return true; default: return false; } } static struct reg_default fsl_amix_reg[] = { { FSL_AMIX_CTR, 0x00060 }, { FSL_AMIX_STR, 0x00003 }, { FSL_AMIX_ATCR0, 0x00000 }, { FSL_AMIX_ATIVAL0, 0x3FFFF }, { FSL_AMIX_ATSTPUP0, 0x2AAAA }, { FSL_AMIX_ATSTPDN0, 0x30000 }, { FSL_AMIX_ATSTPTGT0, 0x00010 }, { FSL_AMIX_ATTNVAL0, 0x00000 }, { FSL_AMIX_ATSTP0, 0x00000 }, { FSL_AMIX_ATCR1, 0x00000 }, { FSL_AMIX_ATIVAL1, 0x3FFFF }, { FSL_AMIX_ATSTPUP1, 0x2AAAA }, { FSL_AMIX_ATSTPDN1, 0x30000 }, { FSL_AMIX_ATSTPTGT1, 0x00010 }, { FSL_AMIX_ATTNVAL1, 0x00000 }, { FSL_AMIX_ATSTP1, 0x00000 }, }; static const struct regmap_config fsl_amix_regmap_config = { .reg_bits = 32, .reg_stride = 4, .val_bits = 32, .max_register = FSL_AMIX_ATSTP1, .reg_defaults = fsl_amix_reg, .num_reg_defaults = ARRAY_SIZE(fsl_amix_reg), .readable_reg = fsl_amix_readable_reg, .writeable_reg = fsl_amix_writeable_reg, .cache_type = REGCACHE_FLAT, }; static int fsl_amix_probe(struct platform_device *pdev) { struct fsl_amix *priv; struct resource *res; void __iomem *regs; int ret; priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; priv->pdev = pdev; /* Get the addresses */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); regs = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(regs)) return PTR_ERR(regs); priv->regmap = devm_regmap_init_mmio_clk(&pdev->dev, "ipg", regs, &fsl_amix_regmap_config); if (IS_ERR(priv->regmap)) { dev_err(&pdev->dev, "failed to init regmap\n"); return PTR_ERR(priv->regmap); } priv->ipg_clk = devm_clk_get(&pdev->dev, "ipg"); if (IS_ERR(priv->ipg_clk)) { dev_err(&pdev->dev, "failed to get ipg clock\n"); return PTR_ERR(priv->ipg_clk); } platform_set_drvdata(pdev, priv); pm_runtime_enable(&pdev->dev); ret = devm_snd_soc_register_component(&pdev->dev, &fsl_amix_component, fsl_amix_dai, ARRAY_SIZE(fsl_amix_dai)); if (ret) { dev_err(&pdev->dev, "failed to register ASoC DAI\n"); return ret; } return 0; } #ifdef CONFIG_PM static int fsl_amix_runtime_resume(struct device *dev) { struct fsl_amix *priv = dev_get_drvdata(dev); int ret; ret = clk_prepare_enable(priv->ipg_clk); if (ret) { dev_err(dev, "Failed to enable IPG clock: %d\n", ret); return ret; } regcache_cache_only(priv->regmap, false); regcache_mark_dirty(priv->regmap); return regcache_sync(priv->regmap); } static int fsl_amix_runtime_suspend(struct device *dev) { struct fsl_amix *priv = dev_get_drvdata(dev); regcache_cache_only(priv->regmap, true); clk_disable_unprepare(priv->ipg_clk); return 0; } #endif /* CONFIG_PM */ static const struct dev_pm_ops fsl_amix_pm = { SET_RUNTIME_PM_OPS(fsl_amix_runtime_suspend, fsl_amix_runtime_resume, NULL) SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume) }; static const struct of_device_id fsl_amix_ids[] = { { .compatible = "fsl,imx8qm-amix", }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, fsl_amix_ids); static struct platform_driver fsl_amix_driver = { .probe = fsl_amix_probe, .driver = { .name = "fsl-amix", .of_match_table = fsl_amix_ids, .pm = &fsl_amix_pm, }, }; module_platform_driver(fsl_amix_driver); MODULE_DESCRIPTION("NXP AMIX ASoC DAI driver"); MODULE_AUTHOR("Viorel Suman "); MODULE_ALIAS("platform:fsl-amix"); MODULE_LICENSE("GPL v2");