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Diffstat (limited to 'sound/soc/tegra/tegra30_i2s.c')
-rw-r--r--sound/soc/tegra/tegra30_i2s.c574
1 files changed, 574 insertions, 0 deletions
diff --git a/sound/soc/tegra/tegra30_i2s.c b/sound/soc/tegra/tegra30_i2s.c
new file mode 100644
index 000000000..10cd37096
--- /dev/null
+++ b/sound/soc/tegra/tegra30_i2s.c
@@ -0,0 +1,574 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * tegra30_i2s.c - Tegra30 I2S driver
+ *
+ * Author: Stephen Warren <swarren@nvidia.com>
+ * Copyright (c) 2010-2012, NVIDIA CORPORATION. All rights reserved.
+ *
+ * Based on code copyright/by:
+ *
+ * Copyright (c) 2009-2010, NVIDIA Corporation.
+ * Scott Peterson <speterson@nvidia.com>
+ *
+ * Copyright (C) 2010 Google, Inc.
+ * Iliyan Malchev <malchev@google.com>
+ */
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+#include <linux/slab.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/dmaengine_pcm.h>
+
+#include "tegra30_ahub.h"
+#include "tegra30_i2s.h"
+
+#define DRV_NAME "tegra30-i2s"
+
+static __maybe_unused int tegra30_i2s_runtime_suspend(struct device *dev)
+{
+ struct tegra30_i2s *i2s = dev_get_drvdata(dev);
+
+ regcache_cache_only(i2s->regmap, true);
+
+ clk_disable_unprepare(i2s->clk_i2s);
+
+ return 0;
+}
+
+static __maybe_unused int tegra30_i2s_runtime_resume(struct device *dev)
+{
+ struct tegra30_i2s *i2s = dev_get_drvdata(dev);
+ int ret;
+
+ ret = clk_prepare_enable(i2s->clk_i2s);
+ if (ret) {
+ dev_err(dev, "clk_enable failed: %d\n", ret);
+ return ret;
+ }
+
+ regcache_cache_only(i2s->regmap, false);
+ regcache_mark_dirty(i2s->regmap);
+
+ ret = regcache_sync(i2s->regmap);
+ if (ret)
+ goto disable_clocks;
+
+ return 0;
+
+disable_clocks:
+ clk_disable_unprepare(i2s->clk_i2s);
+
+ return ret;
+}
+
+static int tegra30_i2s_set_fmt(struct snd_soc_dai *dai,
+ unsigned int fmt)
+{
+ struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+ unsigned int mask = 0, val = 0;
+
+ switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+ case SND_SOC_DAIFMT_NB_NF:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ mask |= TEGRA30_I2S_CTRL_MASTER_ENABLE;
+ switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
+ case SND_SOC_DAIFMT_BP_FP:
+ val |= TEGRA30_I2S_CTRL_MASTER_ENABLE;
+ break;
+ case SND_SOC_DAIFMT_BC_FC:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ mask |= TEGRA30_I2S_CTRL_FRAME_FORMAT_MASK |
+ TEGRA30_I2S_CTRL_LRCK_MASK;
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_DSP_A:
+ val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_FSYNC;
+ val |= TEGRA30_I2S_CTRL_LRCK_L_LOW;
+ break;
+ case SND_SOC_DAIFMT_DSP_B:
+ val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_FSYNC;
+ val |= TEGRA30_I2S_CTRL_LRCK_R_LOW;
+ break;
+ case SND_SOC_DAIFMT_I2S:
+ val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_LRCK;
+ val |= TEGRA30_I2S_CTRL_LRCK_L_LOW;
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_LRCK;
+ val |= TEGRA30_I2S_CTRL_LRCK_L_LOW;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_LRCK;
+ val |= TEGRA30_I2S_CTRL_LRCK_L_LOW;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ pm_runtime_get_sync(dai->dev);
+ regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL, mask, val);
+ pm_runtime_put(dai->dev);
+
+ return 0;
+}
+
+static int tegra30_i2s_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct device *dev = dai->dev;
+ struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+ unsigned int mask, val, reg;
+ int ret, sample_size, srate, i2sclock, bitcnt;
+ struct tegra30_ahub_cif_conf cif_conf;
+
+ if (params_channels(params) != 2)
+ return -EINVAL;
+
+ mask = TEGRA30_I2S_CTRL_BIT_SIZE_MASK;
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+ val = TEGRA30_I2S_CTRL_BIT_SIZE_16;
+ sample_size = 16;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL, mask, val);
+
+ srate = params_rate(params);
+
+ /* Final "* 2" required by Tegra hardware */
+ i2sclock = srate * params_channels(params) * sample_size * 2;
+
+ bitcnt = (i2sclock / (2 * srate)) - 1;
+ if (bitcnt < 0 || bitcnt > TEGRA30_I2S_TIMING_CHANNEL_BIT_COUNT_MASK_US)
+ return -EINVAL;
+
+ ret = clk_set_rate(i2s->clk_i2s, i2sclock);
+ if (ret) {
+ dev_err(dev, "Can't set I2S clock rate: %d\n", ret);
+ return ret;
+ }
+
+ val = bitcnt << TEGRA30_I2S_TIMING_CHANNEL_BIT_COUNT_SHIFT;
+
+ if (i2sclock % (2 * srate))
+ val |= TEGRA30_I2S_TIMING_NON_SYM_ENABLE;
+
+ regmap_write(i2s->regmap, TEGRA30_I2S_TIMING, val);
+
+ cif_conf.threshold = 0;
+ cif_conf.audio_channels = 2;
+ cif_conf.client_channels = 2;
+ cif_conf.audio_bits = TEGRA30_AUDIOCIF_BITS_16;
+ cif_conf.client_bits = TEGRA30_AUDIOCIF_BITS_16;
+ cif_conf.expand = 0;
+ cif_conf.stereo_conv = 0;
+ cif_conf.replicate = 0;
+ cif_conf.truncate = 0;
+ cif_conf.mono_conv = 0;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ cif_conf.direction = TEGRA30_AUDIOCIF_DIRECTION_RX;
+ reg = TEGRA30_I2S_CIF_RX_CTRL;
+ } else {
+ cif_conf.direction = TEGRA30_AUDIOCIF_DIRECTION_TX;
+ reg = TEGRA30_I2S_CIF_TX_CTRL;
+ }
+
+ i2s->soc_data->set_audio_cif(i2s->regmap, reg, &cif_conf);
+
+ val = (1 << TEGRA30_I2S_OFFSET_RX_DATA_OFFSET_SHIFT) |
+ (1 << TEGRA30_I2S_OFFSET_TX_DATA_OFFSET_SHIFT);
+ regmap_write(i2s->regmap, TEGRA30_I2S_OFFSET, val);
+
+ return 0;
+}
+
+static void tegra30_i2s_start_playback(struct tegra30_i2s *i2s)
+{
+ tegra30_ahub_enable_tx_fifo(i2s->playback_fifo_cif);
+ regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL,
+ TEGRA30_I2S_CTRL_XFER_EN_TX,
+ TEGRA30_I2S_CTRL_XFER_EN_TX);
+}
+
+static void tegra30_i2s_stop_playback(struct tegra30_i2s *i2s)
+{
+ tegra30_ahub_disable_tx_fifo(i2s->playback_fifo_cif);
+ regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL,
+ TEGRA30_I2S_CTRL_XFER_EN_TX, 0);
+}
+
+static void tegra30_i2s_start_capture(struct tegra30_i2s *i2s)
+{
+ tegra30_ahub_enable_rx_fifo(i2s->capture_fifo_cif);
+ regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL,
+ TEGRA30_I2S_CTRL_XFER_EN_RX,
+ TEGRA30_I2S_CTRL_XFER_EN_RX);
+}
+
+static void tegra30_i2s_stop_capture(struct tegra30_i2s *i2s)
+{
+ regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL,
+ TEGRA30_I2S_CTRL_XFER_EN_RX, 0);
+ tegra30_ahub_disable_rx_fifo(i2s->capture_fifo_cif);
+}
+
+static int tegra30_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
+ struct snd_soc_dai *dai)
+{
+ struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ tegra30_i2s_start_playback(i2s);
+ else
+ tegra30_i2s_start_capture(i2s);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ tegra30_i2s_stop_playback(i2s);
+ else
+ tegra30_i2s_stop_capture(i2s);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int tegra30_i2s_set_tdm(struct snd_soc_dai *dai,
+ unsigned int tx_mask, unsigned int rx_mask,
+ int slots, int slot_width)
+{
+ struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+ unsigned int mask, val;
+
+ dev_dbg(dai->dev, "%s: txmask=0x%08x rxmask=0x%08x slots=%d width=%d\n",
+ __func__, tx_mask, rx_mask, slots, slot_width);
+
+ mask = TEGRA30_I2S_SLOT_CTRL_TOTAL_SLOTS_MASK |
+ TEGRA30_I2S_SLOT_CTRL_RX_SLOT_ENABLES_MASK |
+ TEGRA30_I2S_SLOT_CTRL_TX_SLOT_ENABLES_MASK;
+
+ val = (tx_mask << TEGRA30_I2S_SLOT_CTRL_TX_SLOT_ENABLES_SHIFT) |
+ (rx_mask << TEGRA30_I2S_SLOT_CTRL_RX_SLOT_ENABLES_SHIFT) |
+ ((slots - 1) << TEGRA30_I2S_SLOT_CTRL_TOTAL_SLOTS_SHIFT);
+
+ pm_runtime_get_sync(dai->dev);
+ regmap_update_bits(i2s->regmap, TEGRA30_I2S_SLOT_CTRL, mask, val);
+ /* set the fsync width to minimum of 1 clock width */
+ regmap_update_bits(i2s->regmap, TEGRA30_I2S_CH_CTRL,
+ TEGRA30_I2S_CH_CTRL_FSYNC_WIDTH_MASK, 0x0);
+ pm_runtime_put(dai->dev);
+
+ return 0;
+}
+
+static int tegra30_i2s_probe(struct snd_soc_dai *dai)
+{
+ struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+
+ dai->capture_dma_data = &i2s->capture_dma_data;
+ dai->playback_dma_data = &i2s->playback_dma_data;
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops tegra30_i2s_dai_ops = {
+ .set_fmt = tegra30_i2s_set_fmt,
+ .hw_params = tegra30_i2s_hw_params,
+ .trigger = tegra30_i2s_trigger,
+ .set_tdm_slot = tegra30_i2s_set_tdm,
+};
+
+static const struct snd_soc_dai_driver tegra30_i2s_dai_template = {
+ .probe = tegra30_i2s_probe,
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000_96000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ },
+ .capture = {
+ .stream_name = "Capture",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000_96000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ },
+ .ops = &tegra30_i2s_dai_ops,
+ .symmetric_rate = 1,
+};
+
+static const struct snd_soc_component_driver tegra30_i2s_component = {
+ .name = DRV_NAME,
+ .legacy_dai_naming = 1,
+};
+
+static bool tegra30_i2s_wr_rd_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case TEGRA30_I2S_CTRL:
+ case TEGRA30_I2S_TIMING:
+ case TEGRA30_I2S_OFFSET:
+ case TEGRA30_I2S_CH_CTRL:
+ case TEGRA30_I2S_SLOT_CTRL:
+ case TEGRA30_I2S_CIF_RX_CTRL:
+ case TEGRA30_I2S_CIF_TX_CTRL:
+ case TEGRA30_I2S_FLOWCTL:
+ case TEGRA30_I2S_TX_STEP:
+ case TEGRA30_I2S_FLOW_STATUS:
+ case TEGRA30_I2S_FLOW_TOTAL:
+ case TEGRA30_I2S_FLOW_OVER:
+ case TEGRA30_I2S_FLOW_UNDER:
+ case TEGRA30_I2S_LCOEF_1_4_0:
+ case TEGRA30_I2S_LCOEF_1_4_1:
+ case TEGRA30_I2S_LCOEF_1_4_2:
+ case TEGRA30_I2S_LCOEF_1_4_3:
+ case TEGRA30_I2S_LCOEF_1_4_4:
+ case TEGRA30_I2S_LCOEF_1_4_5:
+ case TEGRA30_I2S_LCOEF_2_4_0:
+ case TEGRA30_I2S_LCOEF_2_4_1:
+ case TEGRA30_I2S_LCOEF_2_4_2:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool tegra30_i2s_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case TEGRA30_I2S_FLOW_STATUS:
+ case TEGRA30_I2S_FLOW_TOTAL:
+ case TEGRA30_I2S_FLOW_OVER:
+ case TEGRA30_I2S_FLOW_UNDER:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static const struct regmap_config tegra30_i2s_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .max_register = TEGRA30_I2S_LCOEF_2_4_2,
+ .writeable_reg = tegra30_i2s_wr_rd_reg,
+ .readable_reg = tegra30_i2s_wr_rd_reg,
+ .volatile_reg = tegra30_i2s_volatile_reg,
+ .cache_type = REGCACHE_FLAT,
+};
+
+static const struct tegra30_i2s_soc_data tegra30_i2s_config = {
+ .set_audio_cif = tegra30_ahub_set_cif,
+};
+
+static const struct tegra30_i2s_soc_data tegra124_i2s_config = {
+ .set_audio_cif = tegra124_ahub_set_cif,
+};
+
+static const struct of_device_id tegra30_i2s_of_match[] = {
+ { .compatible = "nvidia,tegra124-i2s", .data = &tegra124_i2s_config },
+ { .compatible = "nvidia,tegra30-i2s", .data = &tegra30_i2s_config },
+ {},
+};
+
+static int tegra30_i2s_platform_probe(struct platform_device *pdev)
+{
+ struct tegra30_i2s *i2s;
+ const struct tegra30_i2s_soc_data *soc_data;
+ u32 cif_ids[2];
+ void __iomem *regs;
+ int ret;
+
+ i2s = devm_kzalloc(&pdev->dev, sizeof(struct tegra30_i2s), GFP_KERNEL);
+ if (!i2s) {
+ ret = -ENOMEM;
+ goto err;
+ }
+ dev_set_drvdata(&pdev->dev, i2s);
+
+ soc_data = of_device_get_match_data(&pdev->dev);
+ if (!soc_data) {
+ dev_err(&pdev->dev, "Error: No device match found\n");
+ ret = -ENODEV;
+ goto err;
+ }
+ i2s->soc_data = soc_data;
+
+ i2s->dai = tegra30_i2s_dai_template;
+ i2s->dai.name = dev_name(&pdev->dev);
+
+ ret = of_property_read_u32_array(pdev->dev.of_node,
+ "nvidia,ahub-cif-ids", cif_ids,
+ ARRAY_SIZE(cif_ids));
+ if (ret < 0)
+ goto err;
+
+ i2s->playback_i2s_cif = cif_ids[0];
+ i2s->capture_i2s_cif = cif_ids[1];
+
+ i2s->clk_i2s = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(i2s->clk_i2s)) {
+ dev_err(&pdev->dev, "Can't retrieve i2s clock\n");
+ ret = PTR_ERR(i2s->clk_i2s);
+ goto err;
+ }
+
+ regs = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(regs)) {
+ ret = PTR_ERR(regs);
+ goto err;
+ }
+
+ i2s->regmap = devm_regmap_init_mmio(&pdev->dev, regs,
+ &tegra30_i2s_regmap_config);
+ if (IS_ERR(i2s->regmap)) {
+ dev_err(&pdev->dev, "regmap init failed\n");
+ ret = PTR_ERR(i2s->regmap);
+ goto err;
+ }
+ regcache_cache_only(i2s->regmap, true);
+
+ pm_runtime_enable(&pdev->dev);
+
+ i2s->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ i2s->playback_dma_data.maxburst = 4;
+ ret = tegra30_ahub_allocate_tx_fifo(&i2s->playback_fifo_cif,
+ i2s->playback_dma_chan,
+ sizeof(i2s->playback_dma_chan),
+ &i2s->playback_dma_data.addr);
+ if (ret) {
+ dev_err(&pdev->dev, "Could not alloc TX FIFO: %d\n", ret);
+ goto err_pm_disable;
+ }
+ ret = tegra30_ahub_set_rx_cif_source(i2s->playback_i2s_cif,
+ i2s->playback_fifo_cif);
+ if (ret) {
+ dev_err(&pdev->dev, "Could not route TX FIFO: %d\n", ret);
+ goto err_free_tx_fifo;
+ }
+
+ i2s->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ i2s->capture_dma_data.maxburst = 4;
+ ret = tegra30_ahub_allocate_rx_fifo(&i2s->capture_fifo_cif,
+ i2s->capture_dma_chan,
+ sizeof(i2s->capture_dma_chan),
+ &i2s->capture_dma_data.addr);
+ if (ret) {
+ dev_err(&pdev->dev, "Could not alloc RX FIFO: %d\n", ret);
+ goto err_unroute_tx_fifo;
+ }
+ ret = tegra30_ahub_set_rx_cif_source(i2s->capture_fifo_cif,
+ i2s->capture_i2s_cif);
+ if (ret) {
+ dev_err(&pdev->dev, "Could not route TX FIFO: %d\n", ret);
+ goto err_free_rx_fifo;
+ }
+
+ ret = snd_soc_register_component(&pdev->dev, &tegra30_i2s_component,
+ &i2s->dai, 1);
+ if (ret) {
+ dev_err(&pdev->dev, "Could not register DAI: %d\n", ret);
+ ret = -ENOMEM;
+ goto err_unroute_rx_fifo;
+ }
+
+ ret = tegra_pcm_platform_register_with_chan_names(&pdev->dev,
+ &i2s->dma_config, i2s->playback_dma_chan,
+ i2s->capture_dma_chan);
+ if (ret) {
+ dev_err(&pdev->dev, "Could not register PCM: %d\n", ret);
+ goto err_unregister_component;
+ }
+
+ return 0;
+
+err_unregister_component:
+ snd_soc_unregister_component(&pdev->dev);
+err_unroute_rx_fifo:
+ tegra30_ahub_unset_rx_cif_source(i2s->capture_fifo_cif);
+err_free_rx_fifo:
+ tegra30_ahub_free_rx_fifo(i2s->capture_fifo_cif);
+err_unroute_tx_fifo:
+ tegra30_ahub_unset_rx_cif_source(i2s->playback_i2s_cif);
+err_free_tx_fifo:
+ tegra30_ahub_free_tx_fifo(i2s->playback_fifo_cif);
+err_pm_disable:
+ pm_runtime_disable(&pdev->dev);
+err:
+ return ret;
+}
+
+static int tegra30_i2s_platform_remove(struct platform_device *pdev)
+{
+ struct tegra30_i2s *i2s = dev_get_drvdata(&pdev->dev);
+
+ tegra_pcm_platform_unregister(&pdev->dev);
+ snd_soc_unregister_component(&pdev->dev);
+
+ tegra30_ahub_unset_rx_cif_source(i2s->capture_fifo_cif);
+ tegra30_ahub_free_rx_fifo(i2s->capture_fifo_cif);
+
+ tegra30_ahub_unset_rx_cif_source(i2s->playback_i2s_cif);
+ tegra30_ahub_free_tx_fifo(i2s->playback_fifo_cif);
+
+ pm_runtime_disable(&pdev->dev);
+
+ return 0;
+}
+
+static const struct dev_pm_ops tegra30_i2s_pm_ops = {
+ SET_RUNTIME_PM_OPS(tegra30_i2s_runtime_suspend,
+ tegra30_i2s_runtime_resume, NULL)
+ SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
+};
+
+static struct platform_driver tegra30_i2s_driver = {
+ .driver = {
+ .name = DRV_NAME,
+ .of_match_table = tegra30_i2s_of_match,
+ .pm = &tegra30_i2s_pm_ops,
+ },
+ .probe = tegra30_i2s_platform_probe,
+ .remove = tegra30_i2s_platform_remove,
+};
+module_platform_driver(tegra30_i2s_driver);
+
+MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
+MODULE_DESCRIPTION("Tegra30 I2S ASoC driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRV_NAME);
+MODULE_DEVICE_TABLE(of, tegra30_i2s_of_match);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-30 22:32:35 +0000