Message-Id: <1529320591-22434-1-git-send-email-rohitkr@codeaurora.org>
Date:   Mon, 18 Jun 2018 16:46:31 +0530
From:   Rohit kumar <rohitkr@...eaurora.org>
To:     lgirdwood@...il.com, broonie@...nel.org, robh+dt@...nel.org,
        mark.rutland@....com, plai@...eaurora.org, bgoswami@...eaurora.org,
        perex@...ex.cz, srinivas.kandagatla@...aro.org, tiwai@...e.com,
        alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Rohit kumar <rohitkr@...eaurora.org>
Subject: [PATCH] ASoC: qcom: add sdm845 sound card support

This patch adds sdm845 audio machine driver support.

Signed-off-by: Rohit kumar <rohitkr@...eaurora.org>
---
 .../devicetree/bindings/sound/qcom,sdm845.txt      |  87 ++++
 sound/soc/qcom/Kconfig                             |   9 +
 sound/soc/qcom/Makefile                            |   2 +
 sound/soc/qcom/sdm845.c                            | 539 +++++++++++++++++++++
 4 files changed, 637 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/qcom,sdm845.txt
 create mode 100644 sound/soc/qcom/sdm845.c

diff --git a/Documentation/devicetree/bindings/sound/qcom,sdm845.txt b/Documentation/devicetree/bindings/sound/qcom,sdm845.txt
new file mode 100644
index 0000000..fc0e98c
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/qcom,sdm845.txt
@@ -0,0 +1,87 @@
+* Qualcomm Technologies Inc. SDM845 ASoC sound card driver
+
+This binding describes the SDM845 sound card, which uses qdsp for audio.
+
+- compatible:
+	Usage: required
+	Value type: <stringlist>
+	Definition: must be "qcom,sdm845-sndcard"
+
+- qcom,audio-routing:
+	Usage: Optional
+	Value type: <stringlist>
+	Definition:  A list of the connections between audio components.
+		  Each entry is a pair of strings, the first being the
+		  connection's sink, the second being the connection's
+		  source. Valid names could be power supplies, MicBias
+		  of codec and the jacks on the board.
+
+- cdc-vdd-supply:
+	Usage: Optional
+	Value type: <phandle>
+	Definition: phandle of regulator supply required for codec vdd.
+
+= dailinks
+Each subnode of sndcard represents either a dailink, and subnodes of each
+dailinks would be cpu/codec/platform dais.
+
+- link-name:
+	Usage: required
+	Value type: <string>
+	Definition: User friendly name for dai link
+
+= CPU, PLATFORM, CODEC dais subnodes
+- cpu:
+	Usage: required
+	Value type: <subnode>
+	Definition: cpu dai sub-node
+
+- codec:
+	Usage: required
+	Value type: <subnode>
+	Definition: codec dai sub-node
+
+- platform:
+	Usage: opional
+	Value type: <subnode>
+	Definition: platform dai sub-node
+
+- sound-dai:
+	Usage: required
+	Value type: <phandle>
+	Definition: dai phandle/s and port of CPU/CODEC/PLATFORM node.
+
+Example:
+
+audio {
+	compatible = "qcom,sdm845-sndcard";
+	qcom,model = "sdm845-snd-card";
+	pinctrl-names = "pri_active", "pri_sleep";
+	pinctrl-0 = <&pri_mi2s_active &pri_mi2s_ws_active>;
+	pinctrl-1 = <&pri_mi2s_sleep &pri_mi2s_ws_sleep>;
+
+	qcom,audio-routing = "PRI_MI2S_RX Audio Mixer", "Pri-mi2s-gpio";
+
+	cdc-vdd-supply = <&pm8998_l14>;
+
+	fe@1 {
+		link-name = "MultiMedia1";
+		cpu {
+			sound-dai = <&q6asmdai MSM_FRONTEND_DAI_MULTIMEDIA1>;
+		};
+		platform {
+			sound-dai = <&q6asmdai>;
+		};
+	};
+
+	be@1 {
+		link-name = "PRI MI2S Playback";
+		cpu {
+			sound-dai = <&q6afedai PRIMARY_MI2S_RX>;
+		};
+
+		platform {
+			sound-dai = <&q6routing>;
+		};
+	};
+};
diff --git a/sound/soc/qcom/Kconfig b/sound/soc/qcom/Kconfig
index 87838fa..09de50d 100644
--- a/sound/soc/qcom/Kconfig
+++ b/sound/soc/qcom/Kconfig
@@ -90,3 +90,12 @@ config SND_SOC_MSM8996
           Support for Qualcomm Technologies LPASS audio block in
           APQ8096 SoC-based systems.
           Say Y if you want to use audio device on this SoCs
+
+config SND_SOC_SDM845
+	tristate "SoC Machine driver for SDM845 boards"
+	depends on QCOM_APR
+	select SND_SOC_QDSP6
+	help
+	  To add support for audio on Qualcomm Technologies Inc.
+	  SDM845 SoC-based systems.
+          Say Y if you want to use audio device on this SoCs
diff --git a/sound/soc/qcom/Makefile b/sound/soc/qcom/Makefile
index 206945b..ac9609e 100644
--- a/sound/soc/qcom/Makefile
+++ b/sound/soc/qcom/Makefile
@@ -14,10 +14,12 @@ obj-$(CONFIG_SND_SOC_LPASS_APQ8016) += snd-soc-lpass-apq8016.o
 snd-soc-storm-objs := storm.o
 snd-soc-apq8016-sbc-objs := apq8016_sbc.o
 snd-soc-apq8096-objs := apq8096.o
+snd-soc-sdm845-objs := sdm845.o
 
 obj-$(CONFIG_SND_SOC_STORM) += snd-soc-storm.o
 obj-$(CONFIG_SND_SOC_APQ8016_SBC) += snd-soc-apq8016-sbc.o
 obj-$(CONFIG_SND_SOC_MSM8996) += snd-soc-apq8096.o
++obj-$(CONFIG_SND_SOC_SDM845) += snd-soc-sdm845.o
 
 #DSP lib
 obj-$(CONFIG_SND_SOC_QDSP6) += qdsp6/
diff --git a/sound/soc/qcom/sdm845.c b/sound/soc/qcom/sdm845.c
new file mode 100644
index 0000000..70d2611
--- /dev/null
+++ b/sound/soc/qcom/sdm845.c
@@ -0,0 +1,539 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/module.h>
+#include <linux/component.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/atomic.h>
+#include <linux/of_device.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <linux/soc/qcom/apr.h>
+#include "qdsp6/q6afe.h"
+
+#define DEFAULT_SAMPLE_RATE_48K		48000
+#define DEFAULT_MCLK_RATE		24576000
+#define DEFAULT_BCLK_RATE		1536000
+
+struct sdm845_snd_data {
+	struct snd_soc_card *card;
+	struct regulator *vdd_supply;
+	struct snd_soc_dai_link dai_link[];
+};
+
+static struct mutex pri_mi2s_res_lock;
+static struct mutex quat_tdm_res_lock;
+static atomic_t pri_mi2s_clk_count;
+static atomic_t quat_tdm_clk_count;
+
+static unsigned int tdm_slot_offset[8] = {0, 4, 8, 12, 16, 20, 24, 28};
+
+static int sdm845_tdm_snd_hw_params(struct snd_pcm_substream *substream,
+					struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	int ret = 0;
+	int channels, slot_width;
+
+	channels = params_channels(params);
+	if (channels < 1 || channels > 8) {
+		pr_err("%s: invalid param channels %d\n",
+				__func__, channels);
+		return -EINVAL;
+	}
+
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_S32_LE:
+	case SNDRV_PCM_FORMAT_S24_LE:
+	case SNDRV_PCM_FORMAT_S16_LE:
+		slot_width = 32;
+		break;
+	default:
+		pr_err("%s: invalid param format 0x%x\n",
+				__func__, params_format(params));
+		return -EINVAL;
+	}
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0, 0x3,
+				channels, slot_width);
+		if (ret < 0) {
+			pr_err("%s: failed to set tdm slot, err:%d\n",
+					__func__, ret);
+			goto end;
+		}
+
+		ret = snd_soc_dai_set_channel_map(cpu_dai, 0, NULL,
+				channels, tdm_slot_offset);
+		if (ret < 0) {
+			pr_err("%s: failed to set channel map, err:%d\n",
+					__func__, ret);
+			goto end;
+		}
+	} else {
+		ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0xf, 0,
+				channels, slot_width);
+		if (ret < 0) {
+			pr_err("%s: failed to set tdm slot, err:%d\n",
+					__func__, ret);
+			goto end;
+		}
+
+		ret = snd_soc_dai_set_channel_map(cpu_dai, channels,
+				tdm_slot_offset, 0, NULL);
+		if (ret < 0) {
+			pr_err("%s: failed to set channel map, err:%d\n",
+					__func__, ret);
+			goto end;
+		}
+	}
+end:
+	return ret;
+}
+
+static int sdm845_snd_hw_params(struct snd_pcm_substream *substream,
+					struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	int ret = 0;
+
+	switch (cpu_dai->id) {
+	case QUATERNARY_TDM_RX_0:
+	case QUATERNARY_TDM_TX_0:
+		ret = sdm845_tdm_snd_hw_params(substream, params);
+		break;
+	default:
+		pr_err("%s: invalid dai id 0x%x\n", __func__, cpu_dai->id);
+		break;
+	}
+	return ret;
+}
+
+static int sdm845_snd_startup(struct snd_pcm_substream *substream)
+{
+	unsigned int fmt = SND_SOC_DAIFMT_CBS_CFS;
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+
+	pr_debug("%s: dai_id: 0x%x\n", __func__, cpu_dai->id);
+	switch (cpu_dai->id) {
+	case PRIMARY_MI2S_RX:
+	case PRIMARY_MI2S_TX:
+		mutex_lock(&pri_mi2s_res_lock);
+		if (atomic_inc_return(&pri_mi2s_clk_count) == 1) {
+			snd_soc_dai_set_sysclk(cpu_dai,
+				Q6AFE_LPASS_CLK_ID_MCLK_1,
+				DEFAULT_MCLK_RATE, SNDRV_PCM_STREAM_PLAYBACK);
+			snd_soc_dai_set_sysclk(cpu_dai,
+				Q6AFE_LPASS_CLK_ID_PRI_MI2S_IBIT,
+				DEFAULT_BCLK_RATE, SNDRV_PCM_STREAM_PLAYBACK);
+		}
+		mutex_unlock(&pri_mi2s_res_lock);
+		snd_soc_dai_set_fmt(cpu_dai, fmt);
+		break;
+	case QUATERNARY_TDM_RX_0:
+	case QUATERNARY_TDM_TX_0:
+		mutex_lock(&quat_tdm_res_lock);
+		if (atomic_inc_return(&quat_tdm_clk_count) == 1) {
+			snd_soc_dai_set_sysclk(cpu_dai,
+				Q6AFE_LPASS_CLK_ID_QUAD_TDM_IBIT,
+				DEFAULT_BCLK_RATE, SNDRV_PCM_STREAM_PLAYBACK);
+		}
+		mutex_unlock(&quat_tdm_res_lock);
+		break;
+	default:
+		pr_err("%s: invalid dai id 0x%x\n", __func__, cpu_dai->id);
+		break;
+	}
+	return 0;
+}
+
+static void  sdm845_snd_shutdown(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+
+	pr_debug("%s: dai_id: 0x%x\n", __func__, cpu_dai->id);
+	switch (cpu_dai->id) {
+	case PRIMARY_MI2S_RX:
+	case PRIMARY_MI2S_TX:
+		mutex_lock(&pri_mi2s_res_lock);
+		if (!atomic_dec_return(&pri_mi2s_clk_count)) {
+			snd_soc_dai_set_sysclk(cpu_dai,
+				Q6AFE_LPASS_CLK_ID_MCLK_1,
+				0, SNDRV_PCM_STREAM_PLAYBACK);
+			snd_soc_dai_set_sysclk(cpu_dai,
+				Q6AFE_LPASS_CLK_ID_PRI_MI2S_IBIT,
+				0, SNDRV_PCM_STREAM_PLAYBACK);
+		};
+		mutex_unlock(&pri_mi2s_res_lock);
+		break;
+	case QUATERNARY_TDM_RX_0:
+	case QUATERNARY_TDM_TX_0:
+		mutex_lock(&quat_tdm_res_lock);
+		if (!atomic_dec_return(&quat_tdm_clk_count)) {
+			snd_soc_dai_set_sysclk(cpu_dai,
+				Q6AFE_LPASS_CLK_ID_QUAD_TDM_IBIT,
+				0, SNDRV_PCM_STREAM_PLAYBACK);
+		}
+		mutex_unlock(&quat_tdm_res_lock);
+		break;
+	default:
+		pr_err("%s: invalid dai id 0x%x\n", __func__, cpu_dai->id);
+		break;
+	}
+}
+
+static struct snd_soc_ops sdm845_be_ops = {
+	.hw_params = sdm845_snd_hw_params,
+	.startup = sdm845_snd_startup,
+	.shutdown = sdm845_snd_shutdown,
+};
+
+static int sdm845_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
+				struct snd_pcm_hw_params *params)
+{
+	struct snd_interval *rate = hw_param_interval(params,
+					SNDRV_PCM_HW_PARAM_RATE);
+	struct snd_interval *channels = hw_param_interval(params,
+					SNDRV_PCM_HW_PARAM_CHANNELS);
+
+	rate->min = rate->max = DEFAULT_SAMPLE_RATE_48K;
+	channels->min = channels->max = 2;
+
+	return 0;
+}
+
+static const struct snd_soc_dapm_widget sdm845_widgets[] = {
+	SND_SOC_DAPM_PINCTRL("Pri-mi2s-gpio", "pri_active", "pri_sleep"),
+	SND_SOC_DAPM_PINCTRL("Quat-tdm-gpio", "quat_active", "quat_sleep"),
+};
+
+static int sdm845_sbc_parse_of(struct snd_soc_card *card)
+{
+	struct device *dev = card->dev;
+	struct snd_soc_dai_link *link;
+	struct device_node *np, *codec, *platform, *cpu, *node;
+	int ret, num_links;
+	struct sdm845_snd_data *data;
+
+	ret = snd_soc_of_parse_card_name(card, "qcom,model");
+	if (ret) {
+		dev_err(dev, "Error parsing card name: %d\n", ret);
+		return ret;
+	}
+
+	node = dev->of_node;
+
+	/* DAPM routes */
+	if (of_property_read_bool(node, "qcom,audio-routing")) {
+		ret = snd_soc_of_parse_audio_routing(card,
+					"qcom,audio-routing");
+		if (ret)
+			return ret;
+	}
+
+	/* Populate links */
+	num_links = of_get_child_count(node);
+
+	dev_info(dev, "Found %d child audio dai links..\n", num_links);
+	/* Allocate the private data and the DAI link array */
+	data = kzalloc(sizeof(*data) + sizeof(*link) * num_links,
+			GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	card->dai_link = &data->dai_link[0];
+	card->num_links = num_links;
+	card->dapm_widgets = sdm845_widgets;
+	card->num_dapm_widgets = ARRAY_SIZE(sdm845_widgets);
+
+	link = data->dai_link;
+	data->card = card;
+
+	for_each_child_of_node(node, np) {
+		cpu = of_get_child_by_name(np, "cpu");
+		platform = of_get_child_by_name(np, "platform");
+		codec = of_get_child_by_name(np, "codec");
+
+		if (!cpu) {
+			dev_err(dev, "Can't find cpu DT node\n");
+			ret = -EINVAL;
+			goto fail;
+		}
+
+		link->cpu_of_node = of_parse_phandle(cpu, "sound-dai", 0);
+		if (!link->cpu_of_node) {
+			dev_err(card->dev, "error getting cpu phandle\n");
+			ret = -EINVAL;
+			goto fail;
+		}
+
+		link->platform_of_node = of_parse_phandle(platform,
+				"sound-dai", 0);
+		if (!link->platform_of_node) {
+			dev_err(card->dev, "error getting platform phandle\n");
+			ret = -EINVAL;
+			goto fail;
+		}
+
+		ret = snd_soc_of_get_dai_name(cpu, &link->cpu_dai_name);
+		if (ret) {
+			dev_err(card->dev, "error getting cpu dai name\n");
+			goto fail;
+		}
+
+		if (codec) {
+			ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
+			if (ret < 0) {
+				dev_err(card->dev, "error getting codec dai name\n");
+				goto fail;
+			}
+			link->no_pcm = 1;
+			link->ignore_suspend = 1;
+			link->ignore_pmdown_time = 1;
+			link->ops = &sdm845_be_ops;
+			link->be_hw_params_fixup = sdm845_be_hw_params_fixup;
+		} else {
+			link->dynamic = 1;
+			link->codec_dai_name = "snd-soc-dummy-dai";
+			link->codec_name = "snd-soc-dummy";
+		}
+
+		ret = of_property_read_string(np, "link-name", &link->name);
+		if (ret) {
+			dev_err(card->dev,
+				"error getting codec dai_link name\n");
+			goto fail;
+		}
+
+		link->dpcm_playback = 1;
+		link->dpcm_capture = 1;
+		link->stream_name = link->name;
+		link++;
+	}
+	dev_set_drvdata(dev, card);
+	snd_soc_card_set_drvdata(card, data);
+
+	return ret;
+fail:
+	kfree(data);
+	return ret;
+}
+
+static void sdm845_init_supplies(struct device *dev)
+{
+	struct snd_soc_card *card = dev_get_drvdata(dev);
+	struct sdm845_snd_data *data = snd_soc_card_get_drvdata(card);
+
+	data->vdd_supply = regulator_get(dev, "cdc-vdd");
+	if (IS_ERR(data->vdd_supply)) {
+		dev_err(dev, "Unable to get regulator supplies\n");
+		data->vdd_supply = NULL;
+		return;
+	}
+
+	if (regulator_enable(data->vdd_supply))
+		dev_err(dev, "Unable to enable vdd supply\n");
+}
+
+static void sdm845_deinit_supplies(struct device *dev)
+{
+	struct snd_soc_card *card = dev_get_drvdata(dev);
+	struct sdm845_snd_data *data = snd_soc_card_get_drvdata(card);
+
+	if (!data->vdd_supply)
+		return;
+
+	regulator_disable(data->vdd_supply);
+	regulator_put(data->vdd_supply);
+}
+
+static int sdm845_bind(struct device *dev)
+{
+	struct snd_soc_card *card;
+	int ret;
+
+	card = kzalloc(sizeof(*card), GFP_KERNEL);
+	if (!card)
+		return -ENOMEM;
+
+	ret = component_bind_all(dev, card);
+	if (ret) {
+		dev_err(dev, "Audio components bind failed: %d\n", ret);
+		goto bind_fail;
+	}
+
+	card->dev = dev;
+	ret = sdm845_sbc_parse_of(card);
+	if (ret) {
+		dev_err(dev, "Error parsing OF data\n");
+		goto parse_dt_fail;
+	}
+	sdm845_init_supplies(dev);
+
+	mutex_init(&pri_mi2s_res_lock);
+	mutex_init(&quat_tdm_res_lock);
+	atomic_set(&pri_mi2s_clk_count, 0);
+	atomic_set(&quat_tdm_clk_count, 0);
+	ret = snd_soc_register_card(card);
+	if (ret) {
+		dev_err(dev, "Sound card registration failed\n");
+		goto register_card_fail;
+	}
+	return ret;
+
+register_card_fail:
+	mutex_destroy(&pri_mi2s_res_lock);
+	mutex_destroy(&quat_tdm_res_lock);
+	sdm845_deinit_supplies(dev);
+	kfree(snd_soc_card_get_drvdata(card));
+parse_dt_fail:
+	component_unbind_all(dev, card);
+bind_fail:
+	kfree(card);
+	return ret;
+}
+
+static void sdm845_unbind(struct device *dev)
+{
+	struct snd_soc_card *card = dev_get_drvdata(dev);
+	struct sdm845_snd_data *data = snd_soc_card_get_drvdata(card);
+
+	mutex_destroy(&pri_mi2s_res_lock);
+	mutex_destroy(&quat_tdm_res_lock);
+	if (data->vdd_supply)
+		regulator_put(data->vdd_supply);
+	component_unbind_all(dev, card);
+	snd_soc_unregister_card(card);
+	kfree(data);
+	kfree(card);
+}
+
+static const struct component_master_ops sdm845_ops = {
+	.bind = sdm845_bind,
+	.unbind = sdm845_unbind,
+};
+
+static int sdm845_runtime_resume(struct device *dev)
+{
+	struct snd_soc_card *card = dev_get_drvdata(dev);
+	struct sdm845_snd_data *data = snd_soc_card_get_drvdata(card);
+
+	if (!data->vdd_supply) {
+		dev_dbg(dev, "no supplies defined\n");
+		return 0;
+	}
+
+	if (regulator_enable(data->vdd_supply))
+		dev_err(dev, "Enable regulator supply failed\n");
+
+	return 0;
+}
+
+static int sdm845_runtime_suspend(struct device *dev)
+{
+	struct snd_soc_card *card = dev_get_drvdata(dev);
+	struct sdm845_snd_data *data = snd_soc_card_get_drvdata(card);
+
+	if (!data->vdd_supply) {
+		dev_dbg(dev, "no supplies defined\n");
+		return 0;
+	}
+
+	if (regulator_disable(data->vdd_supply))
+		dev_err(dev, "Disable regulator supply failed\n");
+
+	return 0;
+}
+
+static const struct dev_pm_ops sdm845_pm_ops = {
+	SET_RUNTIME_PM_OPS(sdm845_runtime_suspend,
+			sdm845_runtime_resume, NULL)
+};
+
+static int sdm845_compare_of(struct device *dev, void *data)
+{
+	return dev->of_node == data;
+}
+
+static void sdm845_release_of(struct device *dev, void *data)
+{
+	of_node_put(data);
+}
+
+static int add_audio_components(struct device *dev,
+				struct component_match **matchptr)
+{
+	struct device_node *np, *platform, *cpu, *node, *dai_node;
+
+	node = dev->of_node;
+
+	for_each_child_of_node(node, np) {
+		cpu = of_get_child_by_name(np, "cpu");
+		if (cpu) {
+			dai_node = of_parse_phandle(cpu, "sound-dai", 0);
+			of_node_get(dai_node);
+			component_match_add_release(dev, matchptr,
+					sdm845_release_of,
+					sdm845_compare_of,
+					dai_node);
+		}
+
+		platform = of_get_child_by_name(np, "platform");
+		if (platform) {
+			dai_node = of_parse_phandle(platform, "sound-dai", 0);
+			component_match_add_release(dev, matchptr,
+					sdm845_release_of,
+					sdm845_compare_of,
+					dai_node);
+		}
+	}
+
+	return 0;
+}
+
+static int sdm845_snd_platform_probe(struct platform_device *pdev)
+{
+	struct component_match *match = NULL;
+	int ret;
+
+	ret = add_audio_components(&pdev->dev, &match);
+	if (ret)
+		return ret;
+
+	return component_master_add_with_match(&pdev->dev, &sdm845_ops, match);
+}
+
+static int sdm845_snd_platform_remove(struct platform_device *pdev)
+{
+	component_master_del(&pdev->dev, &sdm845_ops);
+	return 0;
+}
+
+static const struct of_device_id sdm845_snd_device_id[]  = {
+	{ .compatible = "qcom,sdm845-sndcard" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, sdm845_snd_device_id);
+
+static struct platform_driver sdm845_snd_driver = {
+	.probe = sdm845_snd_platform_probe,
+	.remove = sdm845_snd_platform_remove,
+	.driver = {
+		.name = "msm-snd-sdm845",
+		.pm = &sdm845_pm_ops,
+		.owner = THIS_MODULE,
+		.of_match_table = of_match_ptr(sdm845_snd_device_id),
+	},
+};
+module_platform_driver(sdm845_snd_driver);
+
+MODULE_DESCRIPTION("sdm845 ASoC Machine Driver");
+MODULE_LICENSE("GPL v2");
-- 
Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc.,
is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.

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