[alsa-devel] Applied "ASoC: img: Add driver for I2S input controller" to the asoc tree
Mark Brown
broonie at kernel.org
Wed Nov 4 15:59:36 CET 2015
The patch
ASoC: img: Add driver for I2S input controller
has been applied to the asoc tree at
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git
All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying
to this mail.
Thanks,
Mark
>From 15484a2060bc9c81fd2ae93ea5d53c83a5a63f55 Mon Sep 17 00:00:00 2001
From: "Damien.Horsley" <Damien.Horsley at imgtec.com>
Date: Wed, 4 Nov 2015 14:40:48 +0000
Subject: [PATCH] ASoC: img: Add driver for I2S input controller
Add driver for Imagination Technologies I2S input
controller
Signed-off-by: Damien.Horsley <Damien.Horsley at imgtec.com>
Signed-off-by: Mark Brown <broonie at kernel.org>
---
sound/soc/Kconfig | 1 +
sound/soc/Makefile | 1 +
sound/soc/img/Kconfig | 12 ++
sound/soc/img/Makefile | 1 +
sound/soc/img/img-i2s-in.c | 516 +++++++++++++++++++++++++++++++++++++++++++++
5 files changed, 531 insertions(+)
create mode 100644 sound/soc/img/Kconfig
create mode 100644 sound/soc/img/Makefile
create mode 100644 sound/soc/img/img-i2s-in.c
diff --git a/sound/soc/Kconfig b/sound/soc/Kconfig
index 225bfda..b6b11a6 100644
--- a/sound/soc/Kconfig
+++ b/sound/soc/Kconfig
@@ -47,6 +47,7 @@ source "sound/soc/jz4740/Kconfig"
source "sound/soc/nuc900/Kconfig"
source "sound/soc/omap/Kconfig"
source "sound/soc/kirkwood/Kconfig"
+source "sound/soc/img/Kconfig"
source "sound/soc/intel/Kconfig"
source "sound/soc/mediatek/Kconfig"
source "sound/soc/mxs/Kconfig"
diff --git a/sound/soc/Makefile b/sound/soc/Makefile
index 134aca1..08ff929 100644
--- a/sound/soc/Makefile
+++ b/sound/soc/Makefile
@@ -26,6 +26,7 @@ obj-$(CONFIG_SND_SOC) += davinci/
obj-$(CONFIG_SND_SOC) += dwc/
obj-$(CONFIG_SND_SOC) += fsl/
obj-$(CONFIG_SND_SOC) += jz4740/
+obj-$(CONFIG_SND_SOC) += img/
obj-$(CONFIG_SND_SOC) += intel/
obj-$(CONFIG_SND_SOC) += mediatek/
obj-$(CONFIG_SND_SOC) += mxs/
diff --git a/sound/soc/img/Kconfig b/sound/soc/img/Kconfig
new file mode 100644
index 0000000..f9f73d0
--- /dev/null
+++ b/sound/soc/img/Kconfig
@@ -0,0 +1,12 @@
+config SND_SOC_IMG
+ bool "Audio support for Imagination Technologies designs"
+ help
+ Audio support for Imagination Technologies audio hardware
+
+config SND_SOC_IMG_I2S_IN
+ tristate "Imagination I2S Input Device Driver"
+ depends on SND_SOC_IMG
+ select SND_SOC_GENERIC_DMAENGINE_PCM
+ help
+ Say Y or M if you want to add support for I2S in driver for
+ Imagination Technologies I2S in device.
diff --git a/sound/soc/img/Makefile b/sound/soc/img/Makefile
new file mode 100644
index 0000000..fe8426b
--- /dev/null
+++ b/sound/soc/img/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_SND_SOC_IMG_I2S_IN) += img-i2s-in.o
diff --git a/sound/soc/img/img-i2s-in.c b/sound/soc/img/img-i2s-in.c
new file mode 100644
index 0000000..0389203
--- /dev/null
+++ b/sound/soc/img/img-i2s-in.c
@@ -0,0 +1,516 @@
+/*
+ * IMG I2S input controller driver
+ *
+ * Copyright (C) 2015 Imagination Technologies Ltd.
+ *
+ * Author: Damien Horsley <Damien.Horsley at imgtec.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.
+ */
+
+#include <linux/clk.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
+
+#include <sound/core.h>
+#include <sound/dmaengine_pcm.h>
+#include <sound/initval.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#define IMG_I2S_IN_RX_FIFO 0x0
+
+#define IMG_I2S_IN_CTL 0x4
+#define IMG_I2S_IN_CTL_ACTIVE_CHAN_MASK 0xfffffffc
+#define IMG_I2S_IN_CTL_ACTIVE_CH_SHIFT 2
+#define IMG_I2S_IN_CTL_16PACK_MASK BIT(1)
+#define IMG_I2S_IN_CTL_ME_MASK BIT(0)
+
+#define IMG_I2S_IN_CH_CTL 0x4
+#define IMG_I2S_IN_CH_CTL_CCDEL_MASK 0x38000
+#define IMG_I2S_IN_CH_CTL_CCDEL_SHIFT 15
+#define IMG_I2S_IN_CH_CTL_FEN_MASK BIT(14)
+#define IMG_I2S_IN_CH_CTL_FMODE_MASK BIT(13)
+#define IMG_I2S_IN_CH_CTL_16PACK_MASK BIT(12)
+#define IMG_I2S_IN_CH_CTL_JUST_MASK BIT(10)
+#define IMG_I2S_IN_CH_CTL_PACKH_MASK BIT(9)
+#define IMG_I2S_IN_CH_CTL_CLK_TRANS_MASK BIT(8)
+#define IMG_I2S_IN_CH_CTL_BLKP_MASK BIT(7)
+#define IMG_I2S_IN_CH_CTL_FIFO_FLUSH_MASK BIT(6)
+#define IMG_I2S_IN_CH_CTL_LRD_MASK BIT(3)
+#define IMG_I2S_IN_CH_CTL_FW_MASK BIT(2)
+#define IMG_I2S_IN_CH_CTL_SW_MASK BIT(1)
+#define IMG_I2S_IN_CH_CTL_ME_MASK BIT(0)
+
+#define IMG_I2S_IN_CH_STRIDE 0x20
+
+struct img_i2s_in {
+ void __iomem *base;
+ struct clk *clk_sys;
+ struct snd_dmaengine_dai_dma_data dma_data;
+ struct device *dev;
+ unsigned int max_i2s_chan;
+ void __iomem *channel_base;
+ unsigned int active_channels;
+ struct snd_soc_dai_driver dai_driver;
+};
+
+static inline void img_i2s_in_writel(struct img_i2s_in *i2s, u32 val, u32 reg)
+{
+ writel(val, i2s->base + reg);
+}
+
+static inline u32 img_i2s_in_readl(struct img_i2s_in *i2s, u32 reg)
+{
+ return readl(i2s->base + reg);
+}
+
+static inline void img_i2s_in_ch_writel(struct img_i2s_in *i2s, u32 chan,
+ u32 val, u32 reg)
+{
+ writel(val, i2s->channel_base + (chan * IMG_I2S_IN_CH_STRIDE) + reg);
+}
+
+static inline u32 img_i2s_in_ch_readl(struct img_i2s_in *i2s, u32 chan,
+ u32 reg)
+{
+ return readl(i2s->channel_base + (chan * IMG_I2S_IN_CH_STRIDE) + reg);
+}
+
+static inline void img_i2s_in_ch_disable(struct img_i2s_in *i2s, u32 chan)
+{
+ u32 reg;
+
+ reg = img_i2s_in_ch_readl(i2s, chan, IMG_I2S_IN_CH_CTL);
+ reg &= ~IMG_I2S_IN_CH_CTL_ME_MASK;
+ img_i2s_in_ch_writel(i2s, chan, reg, IMG_I2S_IN_CH_CTL);
+}
+
+static inline void img_i2s_in_ch_enable(struct img_i2s_in *i2s, u32 chan)
+{
+ u32 reg;
+
+ reg = img_i2s_in_ch_readl(i2s, chan, IMG_I2S_IN_CH_CTL);
+ reg |= IMG_I2S_IN_CH_CTL_ME_MASK;
+ img_i2s_in_ch_writel(i2s, chan, reg, IMG_I2S_IN_CH_CTL);
+}
+
+static inline void img_i2s_in_disable(struct img_i2s_in *i2s)
+{
+ u32 reg;
+
+ reg = img_i2s_in_readl(i2s, IMG_I2S_IN_CTL);
+ reg &= ~IMG_I2S_IN_CTL_ME_MASK;
+ img_i2s_in_writel(i2s, reg, IMG_I2S_IN_CTL);
+}
+
+static inline void img_i2s_in_enable(struct img_i2s_in *i2s)
+{
+ u32 reg;
+
+ reg = img_i2s_in_readl(i2s, IMG_I2S_IN_CTL);
+ reg |= IMG_I2S_IN_CTL_ME_MASK;
+ img_i2s_in_writel(i2s, reg, IMG_I2S_IN_CTL);
+}
+
+static inline void img_i2s_in_flush(struct img_i2s_in *i2s)
+{
+ int i;
+ u32 reg;
+
+ for (i = 0; i < i2s->active_channels; i++) {
+ reg = img_i2s_in_ch_readl(i2s, i, IMG_I2S_IN_CH_CTL);
+ reg |= IMG_I2S_IN_CH_CTL_FIFO_FLUSH_MASK;
+ img_i2s_in_ch_writel(i2s, i, reg, IMG_I2S_IN_CH_CTL);
+ reg &= ~IMG_I2S_IN_CH_CTL_FIFO_FLUSH_MASK;
+ img_i2s_in_ch_writel(i2s, i, reg, IMG_I2S_IN_CH_CTL);
+ }
+}
+
+static int img_i2s_in_trigger(struct snd_pcm_substream *substream, int cmd,
+ struct snd_soc_dai *dai)
+{
+ struct img_i2s_in *i2s = snd_soc_dai_get_drvdata(dai);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ img_i2s_in_enable(i2s);
+ break;
+
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ img_i2s_in_disable(i2s);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int img_i2s_in_check_rate(struct img_i2s_in *i2s,
+ unsigned int sample_rate, unsigned int frame_size,
+ unsigned int *bclk_filter_enable,
+ unsigned int *bclk_filter_value)
+{
+ unsigned int bclk_freq, cur_freq;
+
+ bclk_freq = sample_rate * frame_size;
+
+ cur_freq = clk_get_rate(i2s->clk_sys);
+
+ if (cur_freq >= bclk_freq * 8) {
+ *bclk_filter_enable = 1;
+ *bclk_filter_value = 0;
+ } else if (cur_freq >= bclk_freq * 7) {
+ *bclk_filter_enable = 1;
+ *bclk_filter_value = 1;
+ } else if (cur_freq >= bclk_freq * 6) {
+ *bclk_filter_enable = 0;
+ *bclk_filter_value = 0;
+ } else {
+ dev_err(i2s->dev,
+ "Sys clock rate %u insufficient for sample rate %u\n",
+ cur_freq, sample_rate);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int img_i2s_in_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
+{
+ struct img_i2s_in *i2s = snd_soc_dai_get_drvdata(dai);
+ unsigned int rate, channels, i2s_channels, frame_size;
+ unsigned int bclk_filter_enable, bclk_filter_value;
+ int i, ret = 0;
+ u32 reg, control_mask, chan_control_mask;
+ u32 control_set = 0, chan_control_set = 0;
+ snd_pcm_format_t format;
+
+ rate = params_rate(params);
+ format = params_format(params);
+ channels = params_channels(params);
+ i2s_channels = channels / 2;
+
+ switch (format) {
+ case SNDRV_PCM_FORMAT_S32_LE:
+ frame_size = 64;
+ chan_control_set |= IMG_I2S_IN_CH_CTL_SW_MASK;
+ chan_control_set |= IMG_I2S_IN_CH_CTL_FW_MASK;
+ chan_control_set |= IMG_I2S_IN_CH_CTL_PACKH_MASK;
+ break;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ frame_size = 64;
+ chan_control_set |= IMG_I2S_IN_CH_CTL_SW_MASK;
+ chan_control_set |= IMG_I2S_IN_CH_CTL_FW_MASK;
+ break;
+ case SNDRV_PCM_FORMAT_S16_LE:
+ frame_size = 32;
+ control_set |= IMG_I2S_IN_CTL_16PACK_MASK;
+ chan_control_set |= IMG_I2S_IN_CH_CTL_16PACK_MASK;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if ((channels < 2) ||
+ (channels > (i2s->max_i2s_chan * 2)) ||
+ (channels % 2))
+ return -EINVAL;
+
+ control_set |= ((i2s_channels - 1) << IMG_I2S_IN_CTL_ACTIVE_CH_SHIFT);
+
+ ret = img_i2s_in_check_rate(i2s, rate, frame_size,
+ &bclk_filter_enable, &bclk_filter_value);
+ if (ret < 0)
+ return ret;
+
+ if (bclk_filter_enable)
+ chan_control_set |= IMG_I2S_IN_CH_CTL_FEN_MASK;
+
+ if (bclk_filter_value)
+ chan_control_set |= IMG_I2S_IN_CH_CTL_FMODE_MASK;
+
+ control_mask = IMG_I2S_IN_CTL_16PACK_MASK |
+ IMG_I2S_IN_CTL_ACTIVE_CHAN_MASK;
+
+ chan_control_mask = IMG_I2S_IN_CH_CTL_16PACK_MASK |
+ IMG_I2S_IN_CH_CTL_FEN_MASK |
+ IMG_I2S_IN_CH_CTL_FMODE_MASK |
+ IMG_I2S_IN_CH_CTL_SW_MASK |
+ IMG_I2S_IN_CH_CTL_FW_MASK |
+ IMG_I2S_IN_CH_CTL_PACKH_MASK;
+
+ reg = img_i2s_in_readl(i2s, IMG_I2S_IN_CTL);
+ reg = (reg & ~control_mask) | control_set;
+ img_i2s_in_writel(i2s, reg, IMG_I2S_IN_CTL);
+
+ for (i = 0; i < i2s->active_channels; i++)
+ img_i2s_in_ch_disable(i2s, i);
+
+ for (i = 0; i < i2s->max_i2s_chan; i++) {
+ reg = img_i2s_in_ch_readl(i2s, i, IMG_I2S_IN_CH_CTL);
+ reg = (reg & ~chan_control_mask) | chan_control_set;
+ img_i2s_in_ch_writel(i2s, i, reg, IMG_I2S_IN_CH_CTL);
+ }
+
+ i2s->active_channels = i2s_channels;
+
+ img_i2s_in_flush(i2s);
+
+ for (i = 0; i < i2s->active_channels; i++)
+ img_i2s_in_ch_enable(i2s, i);
+
+ return 0;
+}
+
+static int img_i2s_in_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ struct img_i2s_in *i2s = snd_soc_dai_get_drvdata(dai);
+ int i;
+ u32 chan_control_mask, lrd_set = 0, blkp_set = 0, chan_control_set = 0;
+ u32 reg;
+
+ switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+ case SND_SOC_DAIFMT_NB_NF:
+ lrd_set |= IMG_I2S_IN_CH_CTL_LRD_MASK;
+ break;
+ case SND_SOC_DAIFMT_NB_IF:
+ break;
+ case SND_SOC_DAIFMT_IB_NF:
+ lrd_set |= IMG_I2S_IN_CH_CTL_LRD_MASK;
+ blkp_set |= IMG_I2S_IN_CH_CTL_BLKP_MASK;
+ break;
+ case SND_SOC_DAIFMT_IB_IF:
+ blkp_set |= IMG_I2S_IN_CH_CTL_BLKP_MASK;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ chan_control_set |= IMG_I2S_IN_CH_CTL_CLK_TRANS_MASK;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBM_CFM:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ chan_control_mask = IMG_I2S_IN_CH_CTL_CLK_TRANS_MASK;
+
+ for (i = 0; i < i2s->active_channels; i++)
+ img_i2s_in_ch_disable(i2s, i);
+
+ /*
+ * BLKP and LRD must be set during separate register writes
+ */
+ for (i = 0; i < i2s->max_i2s_chan; i++) {
+ reg = img_i2s_in_ch_readl(i2s, i, IMG_I2S_IN_CH_CTL);
+ reg = (reg & ~chan_control_mask) | chan_control_set;
+ img_i2s_in_ch_writel(i2s, i, reg, IMG_I2S_IN_CH_CTL);
+ reg = (reg & ~IMG_I2S_IN_CH_CTL_BLKP_MASK) | blkp_set;
+ img_i2s_in_ch_writel(i2s, i, reg, IMG_I2S_IN_CH_CTL);
+ reg = (reg & ~IMG_I2S_IN_CH_CTL_LRD_MASK) | lrd_set;
+ img_i2s_in_ch_writel(i2s, i, reg, IMG_I2S_IN_CH_CTL);
+ }
+
+ for (i = 0; i < i2s->active_channels; i++)
+ img_i2s_in_ch_enable(i2s, i);
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops img_i2s_in_dai_ops = {
+ .trigger = img_i2s_in_trigger,
+ .hw_params = img_i2s_in_hw_params,
+ .set_fmt = img_i2s_in_set_fmt
+};
+
+static int img_i2s_in_dai_probe(struct snd_soc_dai *dai)
+{
+ struct img_i2s_in *i2s = snd_soc_dai_get_drvdata(dai);
+
+ snd_soc_dai_init_dma_data(dai, NULL, &i2s->dma_data);
+
+ return 0;
+}
+
+static const struct snd_soc_component_driver img_i2s_in_component = {
+ .name = "img-i2s-in"
+};
+
+static int img_i2s_in_dma_prepare_slave_config(struct snd_pcm_substream *st,
+ struct snd_pcm_hw_params *params, struct dma_slave_config *sc)
+{
+ unsigned int i2s_channels = params_channels(params) / 2;
+ struct snd_soc_pcm_runtime *rtd = st->private_data;
+ struct snd_dmaengine_dai_dma_data *dma_data;
+ int ret;
+
+ dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, st);
+
+ ret = snd_hwparams_to_dma_slave_config(st, params, sc);
+ if (ret)
+ return ret;
+
+ sc->src_addr = dma_data->addr;
+ sc->src_addr_width = dma_data->addr_width;
+ sc->src_maxburst = 4 * i2s_channels;
+
+ return 0;
+}
+
+static const struct snd_dmaengine_pcm_config img_i2s_in_dma_config = {
+ .prepare_slave_config = img_i2s_in_dma_prepare_slave_config
+};
+
+static int img_i2s_in_probe(struct platform_device *pdev)
+{
+ struct img_i2s_in *i2s;
+ struct resource *res;
+ void __iomem *base;
+ int ret, i;
+ struct reset_control *rst;
+ unsigned int max_i2s_chan_pow_2;
+ struct device *dev = &pdev->dev;
+
+ i2s = devm_kzalloc(dev, sizeof(*i2s), GFP_KERNEL);
+ if (!i2s)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, i2s);
+
+ i2s->dev = dev;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ i2s->base = base;
+
+ if (of_property_read_u32(pdev->dev.of_node, "img,i2s-channels",
+ &i2s->max_i2s_chan)) {
+ dev_err(dev, "No img,i2s-channels property\n");
+ return -EINVAL;
+ }
+
+ max_i2s_chan_pow_2 = 1 << get_count_order(i2s->max_i2s_chan);
+
+ i2s->channel_base = base + (max_i2s_chan_pow_2 * 0x20);
+
+ i2s->clk_sys = devm_clk_get(dev, "sys");
+ if (IS_ERR(i2s->clk_sys)) {
+ if (PTR_ERR(i2s->clk_sys) != -EPROBE_DEFER)
+ dev_err(dev, "Failed to acquire clock 'sys'\n");
+ return PTR_ERR(i2s->clk_sys);
+ }
+
+ ret = clk_prepare_enable(i2s->clk_sys);
+ if (ret)
+ return ret;
+
+ i2s->active_channels = 1;
+ i2s->dma_data.addr = res->start + IMG_I2S_IN_RX_FIFO;
+ i2s->dma_data.addr_width = 4;
+
+ i2s->dai_driver.probe = img_i2s_in_dai_probe;
+ i2s->dai_driver.capture.channels_min = 2;
+ i2s->dai_driver.capture.channels_max = i2s->max_i2s_chan * 2;
+ i2s->dai_driver.capture.rates = SNDRV_PCM_RATE_8000_192000;
+ i2s->dai_driver.capture.formats = SNDRV_PCM_FMTBIT_S32_LE |
+ SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE;
+ i2s->dai_driver.ops = &img_i2s_in_dai_ops;
+
+ rst = devm_reset_control_get(dev, "rst");
+ if (IS_ERR(rst)) {
+ if (PTR_ERR(rst) == -EPROBE_DEFER) {
+ ret = -EPROBE_DEFER;
+ goto err_clk_disable;
+ }
+
+ dev_dbg(dev, "No top level reset found\n");
+
+ img_i2s_in_disable(i2s);
+
+ for (i = 0; i < i2s->max_i2s_chan; i++)
+ img_i2s_in_ch_disable(i2s, i);
+ } else {
+ reset_control_assert(rst);
+ reset_control_deassert(rst);
+ }
+
+ img_i2s_in_writel(i2s, 0, IMG_I2S_IN_CTL);
+
+ for (i = 0; i < i2s->max_i2s_chan; i++)
+ img_i2s_in_ch_writel(i2s, i,
+ (4 << IMG_I2S_IN_CH_CTL_CCDEL_SHIFT) |
+ IMG_I2S_IN_CH_CTL_JUST_MASK |
+ IMG_I2S_IN_CH_CTL_FW_MASK, IMG_I2S_IN_CH_CTL);
+
+ ret = devm_snd_soc_register_component(dev, &img_i2s_in_component,
+ &i2s->dai_driver, 1);
+ if (ret)
+ goto err_clk_disable;
+
+ ret = devm_snd_dmaengine_pcm_register(dev, &img_i2s_in_dma_config, 0);
+ if (ret)
+ goto err_clk_disable;
+
+ return 0;
+
+err_clk_disable:
+ clk_disable_unprepare(i2s->clk_sys);
+
+ return ret;
+}
+
+static int img_i2s_in_dev_remove(struct platform_device *pdev)
+{
+ struct img_i2s_in *i2s = platform_get_drvdata(pdev);
+
+ clk_disable_unprepare(i2s->clk_sys);
+
+ return 0;
+}
+
+static const struct of_device_id img_i2s_in_of_match[] = {
+ { .compatible = "img,i2s-in" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, img_i2s_in_of_match);
+
+static struct platform_driver img_i2s_in_driver = {
+ .driver = {
+ .name = "img-i2s-in",
+ .of_match_table = img_i2s_in_of_match
+ },
+ .probe = img_i2s_in_probe,
+ .remove = img_i2s_in_dev_remove
+};
+module_platform_driver(img_i2s_in_driver);
+
+MODULE_AUTHOR("Damien Horsley <Damien.Horsley at imgtec.com>");
+MODULE_DESCRIPTION("IMG I2S Input Driver");
+MODULE_LICENSE("GPL v2");
--
2.6.1
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