Add the rt linux 4.1.3-rt3 as base
[kvmfornfv.git] / kernel / sound / soc / tegra / tegra30_i2s.c
diff --git a/kernel/sound/soc/tegra/tegra30_i2s.c b/kernel/sound/soc/tegra/tegra30_i2s.c
new file mode 100644 (file)
index 0000000..fe36375
--- /dev/null
@@ -0,0 +1,600 @@
+/*
+ * 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>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#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/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 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 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);
+
+       return 0;
+}
+
+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_MASTER_MASK) {
+       case SND_SOC_DAIFMT_CBS_CFS:
+               val |= TEGRA30_I2S_CTRL_MASTER_ENABLE;
+               break;
+       case SND_SOC_DAIFMT_CBM_CFM:
+               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)
+{
+       tegra30_ahub_disable_rx_fifo(i2s->capture_fifo_cif);
+       regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL,
+                          TEGRA30_I2S_CTRL_XFER_EN_RX, 0);
+}
+
+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_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 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,
+};
+
+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_rates = 1,
+};
+
+static const struct snd_soc_component_driver tegra30_i2s_component = {
+       .name           = DRV_NAME,
+};
+
+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 of_device_id *match;
+       u32 cif_ids[2];
+       struct resource *mem, *memregion;
+       void __iomem *regs;
+       int ret;
+
+       i2s = devm_kzalloc(&pdev->dev, sizeof(struct tegra30_i2s), GFP_KERNEL);
+       if (!i2s) {
+               dev_err(&pdev->dev, "Can't allocate tegra30_i2s\n");
+               ret = -ENOMEM;
+               goto err;
+       }
+       dev_set_drvdata(&pdev->dev, i2s);
+
+       match = of_match_device(tegra30_i2s_of_match, &pdev->dev);
+       if (!match) {
+               dev_err(&pdev->dev, "Error: No device match found\n");
+               ret = -ENODEV;
+               goto err;
+       }
+       i2s->soc_data = (struct tegra30_i2s_soc_data *)match->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 = 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;
+       }
+
+       mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       if (!mem) {
+               dev_err(&pdev->dev, "No memory resource\n");
+               ret = -ENODEV;
+               goto err_clk_put;
+       }
+
+       memregion = devm_request_mem_region(&pdev->dev, mem->start,
+                                           resource_size(mem), DRV_NAME);
+       if (!memregion) {
+               dev_err(&pdev->dev, "Memory region already claimed\n");
+               ret = -EBUSY;
+               goto err_clk_put;
+       }
+
+       regs = devm_ioremap(&pdev->dev, mem->start, resource_size(mem));
+       if (!regs) {
+               dev_err(&pdev->dev, "ioremap failed\n");
+               ret = -ENOMEM;
+               goto err_clk_put;
+       }
+
+       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_clk_put;
+       }
+       regcache_cache_only(i2s->regmap, true);
+
+       pm_runtime_enable(&pdev->dev);
+       if (!pm_runtime_enabled(&pdev->dev)) {
+               ret = tegra30_i2s_runtime_resume(&pdev->dev);
+               if (ret)
+                       goto err_pm_disable;
+       }
+
+       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_suspend;
+       }
+       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_suspend:
+       if (!pm_runtime_status_suspended(&pdev->dev))
+               tegra30_i2s_runtime_suspend(&pdev->dev);
+err_pm_disable:
+       pm_runtime_disable(&pdev->dev);
+err_clk_put:
+       clk_put(i2s->clk_i2s);
+err:
+       return ret;
+}
+
+static int tegra30_i2s_platform_remove(struct platform_device *pdev)
+{
+       struct tegra30_i2s *i2s = dev_get_drvdata(&pdev->dev);
+
+       pm_runtime_disable(&pdev->dev);
+       if (!pm_runtime_status_suspended(&pdev->dev))
+               tegra30_i2s_runtime_suspend(&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);
+
+       clk_put(i2s->clk_i2s);
+
+       return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int tegra30_i2s_suspend(struct device *dev)
+{
+       struct tegra30_i2s *i2s = dev_get_drvdata(dev);
+
+       regcache_mark_dirty(i2s->regmap);
+
+       return 0;
+}
+
+static int tegra30_i2s_resume(struct device *dev)
+{
+       struct tegra30_i2s *i2s = dev_get_drvdata(dev);
+       int ret;
+
+       ret = pm_runtime_get_sync(dev);
+       if (ret < 0)
+               return ret;
+       ret = regcache_sync(i2s->regmap);
+       pm_runtime_put(dev);
+
+       return ret;
+}
+#endif
+
+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(tegra30_i2s_suspend, tegra30_i2s_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);