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Merge series "Tegra210 audio graph card" from Sameer Pujar <spujar@nvidia.com>: 

This series adds audio graph based sound card support for Tegra210
platforms like Jetson-TX1 an Jetson-Nano. The following preparatory
audio graph enhancement series is already merged.
 * https://patchwork.kernel.org/project/alsa-devel/list/?series=375629&state=*

Following are the summary of changes:
 * Add graph/audio-graph based schemas or schema updates for Tegra210
   component and machine drivers.
 * Add Tegra audio graph machine driver.
 * Add required DT support for Jetson-TX1/Nano.

This work is based on earlier discussion of DPCM usage for Tegra
and simple card driver updates.
 * https://lkml.org/lkml/2020/4/30/519
 * https://lkml.org/lkml/2020/6/27/4

Original v6 series was sent about 6-7 weeks back. The dependency commit,
https://lore.kernel.org/alsa-devel/1610948585-16286-1-git-send-email-spujar@nvidia.com/
is now merged. Resending this now to appear in the top of the mail list.

Changelog
=========

v5 -> v6
--------
 * Added ports or port description in YAML docs for Tegra AHUB
   devices and graph card in patch 1/6 and 2/6. Reference of
   audio-graph-port.yaml is used for AHUB devices.
 * Dropped redundant NULL check return for of_device_get_match_data()
   in patch 3/6.
 * Added 'Reviewed-by' tag from Jon Hunter.
 * No changes in remaining patches.

v4 -> v5
--------
 * Audio graph related changes were sent in separate v5 series as
   mentioned above and are dropped from current series.
 * Graph and audio graph doc patches are dropped from this series
   and are sent separately as mentioned above.
 * Minor change with phandle label for TX1 and Nano platform DT files.
 * No changes in other patches.

v3 -> v4
--------
 * Added new patches to convert graph.txt and audio-graph-card.txt
   to corresponding json-schema files. Later these references
   are used in Tegra audio graph schema.

 * AHUB component binding docs are updated to reflect the usage
   of ports/port/endpoint

 * More common stuff is moved into graph_parse_of() and this is
   used by both generic and Tegra audio graph.

 * DT binding for Tegra audio graph is updated to included "ports { }"

 * As per the suggestion 'void *data' member is dropped from
   'asoc_simple_priv' and instead container method is used to
   maintain required custom data internal to Tegra audio graph.

v2 -> v3
--------
 * Dropped new compatible addition in generic graph driver
   after reviewing it with Morimoto-san. Instead added Tegra
   audio graph driver and new compatibles are added in the same.
 * Added new patches to expose new members for customization
   in audio graph driver.
 * Added new patch for Tegra audio graph driver and related
   documentation.
 * Minor change in below commit where mutex version of helper is used
   "ASoC: audio-graph: Identify 'no_pcm' DAI links for DPCM"
 * DT binding is updated to use the newly exposed compatibles
 * No changes in other patches

v1 -> v2
--------
 * Re-organized ports/endpoints description for ADMAIF and XBAR.
   Updated DT patches accordingly.
 * After above change, multiple Codec endpoint support is not
   required and hence dropped for now. This will be considered
   separately if at all required in future.
 * Re-ordered patches in the series.

Sameer Pujar (6):
  ASoC: dt-bindings: tegra: Add graph bindings
  ASoC: dt-bindings: tegra: Add json-schema for Tegra audio graph card
  ASoC: tegra: Add audio graph based card driver
  arm64: defconfig: Enable Tegra audio graph card driver
  arm64: tegra: Audio graph header for Tegra210
  arm64: tegra: Audio graph sound card for Jetson Nano and TX1

 .../sound/nvidia,tegra-audio-graph-card.yaml       | 187 +++++++++++++++
 .../bindings/sound/nvidia,tegra186-dspk.yaml       |  18 +-
 .../bindings/sound/nvidia,tegra210-admaif.yaml     |  13 +-
 .../bindings/sound/nvidia,tegra210-ahub.yaml       |  13 +-
 .../bindings/sound/nvidia,tegra210-dmic.yaml       |  18 +-
 .../bindings/sound/nvidia,tegra210-i2s.yaml        |  18 +-
 .../boot/dts/nvidia/tegra210-audio-graph.dtsi      | 153 ++++++++++++
 arch/arm64/boot/dts/nvidia/tegra210-p2371-2180.dts | 262 +++++++++++++++++++++
 arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts | 146 ++++++++++++
 arch/arm64/configs/defconfig                       |   1 +
 sound/soc/tegra/Kconfig                            |   9 +
 sound/soc/tegra/Makefile                           |   2 +
 sound/soc/tegra/tegra_audio_graph_card.c           | 251 ++++++++++++++++++++
 13 files changed, 1085 insertions(+), 6 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/sound/nvidia,tegra-audio-graph-card.yaml
 create mode 100644 arch/arm64/boot/dts/nvidia/tegra210-audio-graph.dtsi
 create mode 100644 sound/soc/tegra/tegra_audio_graph_card.c

--
2.7.4
This commit is contained in:
Mark Brown 2021-01-19 16:20:13 +00:00
parent 9769243240 202e2f7745
commit 6b050d45a6
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
9 changed files with 523 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

187
Documentation/devicetree/bindings/sound/nvidia,tegra-audio-graph-card.yaml Normal file
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@ -0,0 +1,187 @@
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/sound/nvidia,tegra-audio-graph-card.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Audio Graph based Tegra sound card driver
description: |
This is based on generic audio graph card driver along with additional
customizations for Tegra platforms. It uses the same bindings with
additional standard clock DT bindings required for Tegra.
maintainers:
- Jon Hunter <jonathanh@nvidia.com>
- Sameer Pujar <spujar@nvidia.com>
allOf:
- $ref: audio-graph.yaml#
properties:
compatible:
enum:
- nvidia,tegra210-audio-graph-card
- nvidia,tegra186-audio-graph-card
clocks:
minItems: 2
clock-names:
minItems: 2
items:
- const: pll_a
- const: plla_out0
assigned-clocks:
minItems: 1
maxItems: 3
assigned-clock-parents:
minItems: 1
maxItems: 3
assigned-clock-rates:
minItems: 1
maxItems: 3
required:
- clocks
- clock-names
- assigned-clocks
- assigned-clock-parents
unevaluatedProperties: false
examples:
- |
#include<dt-bindings/clock/tegra210-car.h>
tegra_sound {
compatible = "nvidia,tegra210-audio-graph-card";
clocks = <&tegra_car TEGRA210_CLK_PLL_A>,
<&tegra_car TEGRA210_CLK_PLL_A_OUT0>;
clock-names = "pll_a", "plla_out0";
assigned-clocks = <&tegra_car TEGRA210_CLK_PLL_A>,
<&tegra_car TEGRA210_CLK_PLL_A_OUT0>,
<&tegra_car TEGRA210_CLK_EXTERN1>;
assigned-clock-parents = <0>, <0>, <&tegra_car TEGRA210_CLK_PLL_A_OUT0>;
assigned-clock-rates = <368640000>, <49152000>, <12288000>;
dais = /* FE */
<&admaif1_port>,
/* Router */
<&xbar_i2s1_port>,
/* I/O DAP Ports */
<&i2s1_port>;
label = "jetson-tx1-ape";
};
// The ports are defined for AHUB and its child devices.
ahub@702d0800 {
compatible = "nvidia,tegra210-ahub";
reg = <0x702d0800 0x800>;
clocks = <&tegra_car TEGRA210_CLK_D_AUDIO>;
clock-names = "ahub";
assigned-clocks = <&tegra_car TEGRA210_CLK_D_AUDIO>;
assigned-clock-parents = <&tegra_car TEGRA210_CLK_PLL_A_OUT0>;
#address-cells = <1>;
#size-cells = <1>;
ranges = <0x702d0000 0x702d0000 0x0000e400>;
ports {
#address-cells = <1>;
#size-cells = <0>;
port@0 {
reg = <0x0>;
xbar_admaif1_ep: endpoint {
remote-endpoint = <&admaif1_ep>;
};
};
// ...
xbar_i2s1_port: port@a {
reg = <0xa>;
xbar_i2s1_ep: endpoint {
remote-endpoint = <&i2s1_cif_ep>;
};
};
};
admaif@702d0000 {
compatible = "nvidia,tegra210-admaif";
reg = <0x702d0000 0x800>;
dmas = <&adma 1>, <&adma 1>,
<&adma 2>, <&adma 2>,
<&adma 3>, <&adma 3>,
<&adma 4>, <&adma 4>,
<&adma 5>, <&adma 5>,
<&adma 6>, <&adma 6>,
<&adma 7>, <&adma 7>,
<&adma 8>, <&adma 8>,
<&adma 9>, <&adma 9>,
<&adma 10>, <&adma 10>;
dma-names = "rx1", "tx1",
"rx2", "tx2",
"rx3", "tx3",
"rx4", "tx4",
"rx5", "tx5",
"rx6", "tx6",
"rx7", "tx7",
"rx8", "tx8",
"rx9", "tx9",
"rx10", "tx10";
ports {
#address-cells = <1>;
#size-cells = <0>;
admaif1_port: port@0 {
reg = <0x0>;
admaif1_ep: endpoint {
remote-endpoint = <&xbar_admaif1_ep>;
};
};
// More ADMAIF ports to follow
};
};
i2s@702d1000 {
compatible = "nvidia,tegra210-i2s";
clocks = <&tegra_car TEGRA210_CLK_I2S0>;
clock-names = "i2s";
assigned-clocks = <&tegra_car TEGRA210_CLK_I2S0>;
assigned-clock-parents = <&tegra_car TEGRA210_CLK_PLL_A_OUT0>;
assigned-clock-rates = <1536000>;
reg = <0x702d1000 0x100>;
ports {
#address-cells = <1>;
#size-cells = <0>;
port@0 {
reg = <0x0>;
i2s1_cif_ep: endpoint {
remote-endpoint = <&xbar_i2s1_ep>;
};
};
i2s1_port: port@1 {
reg = <0x1>;
i2s1_dap: endpoint {
dai-format = "i2s";
};
};
};
};
};
...

18
Documentation/devicetree/bindings/sound/nvidia,tegra186-dspk.yaml
View File

@ -17,6 +17,9 @@ maintainers:
- Jon Hunter <jonathanh@nvidia.com>
- Sameer Pujar <spujar@nvidia.com>
allOf:
- $ref: audio-graph-port.yaml#
properties:
$nodename:
pattern: "^dspk@[0-9a-f]*$"
@ -55,6 +58,19 @@ properties:
The name can be "DSPK1" or "DSPKx", where x depends on the maximum
available instances on a Tegra SoC.
ports:
type: object
properties:
port@0:
description: |
DSPK ACIF (Audio Client Interface) port connected to the
corresponding AHUB (Audio Hub) ACIF port.
port@1:
description: |
DSPK DAP (Digital Audio Port) interface which can be connected
to external audio codec for playback.
required:
- compatible
- reg
@ -64,7 +80,7 @@ required:
- assigned-clock-parents
- sound-name-prefix
additionalProperties: false
unevaluatedProperties: false
examples:
- |

13
Documentation/devicetree/bindings/sound/nvidia,tegra210-admaif.yaml
View File

@ -17,6 +17,9 @@ maintainers:
- Jon Hunter <jonathanh@nvidia.com>
- Sameer Pujar <spujar@nvidia.com>
allOf:
- $ref: audio-graph-port.yaml#
properties:
$nodename:
pattern: "^admaif@[0-9a-f]*$"
@ -37,6 +40,14 @@ properties:
dma-names: true
ports:
description: |
Contains list of ACIF (Audio CIF) port nodes for ADMAIF channels.
The number of port nodes depends on the number of ADMAIF channels
that SoC may have. These are interfaced with respective ACIF ports
in AHUB (Audio Hub). Each port is capable of data transfers in
both directions.
if:
properties:
compatible:
@ -81,7 +92,7 @@ required:
- dmas
- dma-names
additionalProperties: false
unevaluatedProperties: false
examples:
- |

13
Documentation/devicetree/bindings/sound/nvidia,tegra210-ahub.yaml
View File

@ -17,6 +17,9 @@ maintainers:
- Jon Hunter <jonathanh@nvidia.com>
- Sameer Pujar <spujar@nvidia.com>
allOf:
- $ref: audio-graph-port.yaml#
properties:
$nodename:
pattern: "^ahub@[0-9a-f]*$"
@ -56,6 +59,13 @@ properties:
ranges: true
ports:
description: |
Contains list of ACIF (Audio CIF) port nodes for AHUB (Audio Hub).
These are connected to ACIF interfaces of AHUB clients. Thus the
number of port nodes depend on the number of clients that AHUB may
have depending on the SoC revision.
required:
- compatible
- reg
@ -67,8 +77,7 @@ required:
- "#size-cells"
- ranges
additionalProperties:
type: object
unevaluatedProperties: false
examples:
- |

18
Documentation/devicetree/bindings/sound/nvidia,tegra210-dmic.yaml
View File

@ -16,6 +16,9 @@ maintainers:
- Jon Hunter <jonathanh@nvidia.com>
- Sameer Pujar <spujar@nvidia.com>
allOf:
- $ref: audio-graph-port.yaml#
properties:
$nodename:
pattern: "^dmic@[0-9a-f]*$"
@ -56,6 +59,19 @@ properties:
The name can be "DMIC1" or "DMIC2" ... "DMICx", where x depends
on the maximum available instances on a Tegra SoC.
ports:
type: object
properties:
port@0:
description: |
DMIC ACIF (Audio Client Interface) port connected to the
corresponding AHUB (Audio Hub) ACIF port.
port@1:
description: |
DMIC DAP (Digital Audio Port) interface which can be connected
to external audio codec for capture.
required:
- compatible
- reg
@ -64,7 +80,7 @@ required:
- assigned-clocks
- assigned-clock-parents
additionalProperties: false
unevaluatedProperties: false
examples:
- |

18
Documentation/devicetree/bindings/sound/nvidia,tegra210-i2s.yaml
View File

@ -16,6 +16,9 @@ maintainers:
- Jon Hunter <jonathanh@nvidia.com>
- Sameer Pujar <spujar@nvidia.com>
allOf:
- $ref: audio-graph-port.yaml#
properties:
$nodename:
pattern: "^i2s@[0-9a-f]*$"
@ -74,6 +77,19 @@ properties:
The name can be "I2S1" or "I2S2" ... "I2Sx", where x depends
on the maximum available instances on a Tegra SoC.
ports:
type: object
properties:
port@0:
description: |
I2S ACIF (Audio Client Interface) port connected to the
corresponding AHUB (Audio Hub) ACIF port.
port@1:
description: |
I2S DAP (Digital Audio Port) interface which can be connected
to external audio codec for playback or capture.
required:
- compatible
- reg
@ -82,7 +98,7 @@ required:
- assigned-clocks
- assigned-clock-parents
additionalProperties: false
unevaluatedProperties: false
examples:
- |

9
sound/soc/tegra/Kconfig
View File

@ -117,6 +117,15 @@ config SND_SOC_TEGRA210_ADMAIF
channel. Buffer size is configurable for each ADMAIIF channel.
Say Y or M if you want to add support for Tegra210 ADMAIF module.
config SND_SOC_TEGRA_AUDIO_GRAPH_CARD
tristate "Audio Graph Card based Tegra driver"
depends on SND_AUDIO_GRAPH_CARD
help
Config to enable Tegra audio machine driver based on generic
audio graph driver. It is a thin driver written to customize
few things for Tegra audio. Most of the code is re-used from
audio graph driver and the same DT bindings are used.
config SND_SOC_TEGRA_RT5640
tristate "SoC Audio support for Tegra boards using an RT5640 codec"
depends on SND_SOC_TEGRA && I2C && GPIOLIB

2
sound/soc/tegra/Makefile
View File

@ -38,6 +38,7 @@ snd-soc-tegra-trimslice-objs := trimslice.o
snd-soc-tegra-alc5632-objs := tegra_alc5632.o
snd-soc-tegra-max98090-objs := tegra_max98090.o
snd-soc-tegra-sgtl5000-objs := tegra_sgtl5000.o
snd-soc-tegra-audio-graph-card-objs := tegra_audio_graph_card.o
obj-$(CONFIG_SND_SOC_TEGRA_RT5640) += snd-soc-tegra-rt5640.o
obj-$(CONFIG_SND_SOC_TEGRA_RT5677) += snd-soc-tegra-rt5677.o
@ -48,3 +49,4 @@ obj-$(CONFIG_SND_SOC_TEGRA_TRIMSLICE) += snd-soc-tegra-trimslice.o
obj-$(CONFIG_SND_SOC_TEGRA_ALC5632) += snd-soc-tegra-alc5632.o
obj-$(CONFIG_SND_SOC_TEGRA_MAX98090) += snd-soc-tegra-max98090.o
obj-$(CONFIG_SND_SOC_TEGRA_SGTL5000) += snd-soc-tegra-sgtl5000.o
obj-$(CONFIG_SND_SOC_TEGRA_AUDIO_GRAPH_CARD) += snd-soc-tegra-audio-graph-card.o

251
sound/soc/tegra/tegra_audio_graph_card.c Normal file
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@ -0,0 +1,251 @@
// SPDX-License-Identifier: GPL-2.0-only
//
// tegra_audio_graph_card.c - Audio Graph based Tegra Machine Driver
//
// Copyright (c) 2020 NVIDIA CORPORATION. All rights reserved.
#include <linux/math64.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <sound/graph_card.h>
#include <sound/pcm_params.h>
#define MAX_PLLA_OUT0_DIV 128
#define simple_to_tegra_priv(simple) \
container_of(simple, struct tegra_audio_priv, simple)
enum srate_type {
/*
* Sample rates multiple of 8000 Hz and below are supported:
* ( 8000, 16000, 32000, 48000, 96000, 192000 Hz )
*/
x8_RATE,
/*
* Sample rates multiple of 11025 Hz and below are supported:
* ( 11025, 22050, 44100, 88200, 176400 Hz )
*/
x11_RATE,
NUM_RATE_TYPE,
};
struct tegra_audio_priv {
struct asoc_simple_priv simple;
struct clk *clk_plla_out0;
struct clk *clk_plla;
};
/* Tegra audio chip data */
struct tegra_audio_cdata {
unsigned int plla_rates[NUM_RATE_TYPE];
unsigned int plla_out0_rates[NUM_RATE_TYPE];
};
/* Setup PLL clock as per the given sample rate */
static int tegra_audio_graph_update_pll(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
struct asoc_simple_priv *simple = snd_soc_card_get_drvdata(rtd->card);
struct tegra_audio_priv *priv = simple_to_tegra_priv(simple);
struct device *dev = rtd->card->dev;
const struct tegra_audio_cdata *data = of_device_get_match_data(dev);
unsigned int plla_rate, plla_out0_rate, bclk;
unsigned int srate = params_rate(params);
int err;
switch (srate) {
case 11025:
case 22050:
case 44100:
case 88200:
case 176400:
plla_out0_rate = data->plla_out0_rates[x11_RATE];
plla_rate = data->plla_rates[x11_RATE];
break;
case 8000:
case 16000:
case 32000:
case 48000:
case 96000:
case 192000:
plla_out0_rate = data->plla_out0_rates[x8_RATE];
plla_rate = data->plla_rates[x8_RATE];
break;
default:
dev_err(rtd->card->dev, "Unsupported sample rate %u\n",
srate);
return -EINVAL;
}
/*
* Below is the clock relation:
*
* PLLA
* |
* |--> PLLA_OUT0
* |
* |---> I2S modules
* |
* |---> DMIC modules
* |
* |---> DSPK modules
*
*
* Default PLLA_OUT0 rate might be too high when I/O is running
* at minimum PCM configurations. This may result in incorrect
* clock rates and glitchy audio. The maximum divider is 128
* and any thing higher than that won't work. Thus reduce PLLA_OUT0
* to work for lower configurations.
*
* This problem is seen for I2S only, as DMIC and DSPK minimum
* clock requirements are under allowed divider limits.
*/
bclk = srate * params_channels(params) * params_width(params);
if (div_u64(plla_out0_rate, bclk) > MAX_PLLA_OUT0_DIV)
plla_out0_rate >>= 1;
dev_dbg(rtd->card->dev,
"Update clock rates: PLLA(= %u Hz) and PLLA_OUT0(= %u Hz)\n",
plla_rate, plla_out0_rate);
/* Set PLLA rate */
err = clk_set_rate(priv->clk_plla, plla_rate);
if (err) {
dev_err(rtd->card->dev,
"Can't set plla rate for %u, err: %d\n",
plla_rate, err);
return err;
}
/* Set PLLA_OUT0 rate */
err = clk_set_rate(priv->clk_plla_out0, plla_out0_rate);
if (err) {
dev_err(rtd->card->dev,
"Can't set plla_out0 rate %u, err: %d\n",
plla_out0_rate, err);
return err;
}
return err;
}
static int tegra_audio_graph_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
int err;
/*
* This gets called for each DAI link (FE or BE) when DPCM is used.
* We may not want to update PLLA rate for each call. So PLLA update
* must be restricted to external I/O links (I2S, DMIC or DSPK) since
* they actually depend on it. I/O modules update their clocks in
* hw_param() of their respective component driver and PLLA rate
* update here helps them to derive appropriate rates.
*
* TODO: When more HW accelerators get added (like sample rate
* converter, volume gain controller etc., which don't really
* depend on PLLA) we need a better way to filter here.
*/
if (cpu_dai->driver->ops && rtd->dai_link->no_pcm) {
err = tegra_audio_graph_update_pll(substream, params);
if (err)
return err;
}
return asoc_simple_hw_params(substream, params);
}
static const struct snd_soc_ops tegra_audio_graph_ops = {
.startup = asoc_simple_startup,
.shutdown = asoc_simple_shutdown,
.hw_params = tegra_audio_graph_hw_params,
};
static int tegra_audio_graph_card_probe(struct snd_soc_card *card)
{
struct asoc_simple_priv *simple = snd_soc_card_get_drvdata(card);
struct tegra_audio_priv *priv = simple_to_tegra_priv(simple);
priv->clk_plla = devm_clk_get(card->dev, "pll_a");
if (IS_ERR(priv->clk_plla)) {
dev_err(card->dev, "Can't retrieve clk pll_a\n");
return PTR_ERR(priv->clk_plla);
}
priv->clk_plla_out0 = devm_clk_get(card->dev, "plla_out0");
if (IS_ERR(priv->clk_plla_out0)) {
dev_err(card->dev, "Can't retrieve clk plla_out0\n");
return PTR_ERR(priv->clk_plla_out0);
}
return graph_card_probe(card);
}
static int tegra_audio_graph_probe(struct platform_device *pdev)
{
struct tegra_audio_priv *priv;
struct device *dev = &pdev->dev;
struct snd_soc_card *card;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
card = simple_priv_to_card(&priv->simple);
card->probe = tegra_audio_graph_card_probe;
/* graph_parse_of() depends on below */
card->component_chaining = 1;
priv->simple.ops = &tegra_audio_graph_ops;
priv->simple.force_dpcm = 1;
return graph_parse_of(&priv->simple, dev);
}
static const struct tegra_audio_cdata tegra210_data = {
/* PLLA */
.plla_rates[x8_RATE] = 368640000,
.plla_rates[x11_RATE] = 338688000,
/* PLLA_OUT0 */
.plla_out0_rates[x8_RATE] = 49152000,
.plla_out0_rates[x11_RATE] = 45158400,
};
static const struct tegra_audio_cdata tegra186_data = {
/* PLLA */
.plla_rates[x8_RATE] = 245760000,
.plla_rates[x11_RATE] = 270950400,
/* PLLA_OUT0 */
.plla_out0_rates[x8_RATE] = 49152000,
.plla_out0_rates[x11_RATE] = 45158400,
};
static const struct of_device_id graph_of_tegra_match[] = {
{ .compatible = "nvidia,tegra210-audio-graph-card",
.data = &tegra210_data },
{ .compatible = "nvidia,tegra186-audio-graph-card",
.data = &tegra186_data },
{},
};
MODULE_DEVICE_TABLE(of, graph_of_tegra_match);
static struct platform_driver tegra_audio_graph_card = {
.driver = {
.name = "tegra-audio-graph-card",
.pm = &snd_soc_pm_ops,
.of_match_table = graph_of_tegra_match,
},
.probe = tegra_audio_graph_probe,
};
module_platform_driver(tegra_audio_graph_card);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("ASoC Tegra Audio Graph Sound Card");
MODULE_AUTHOR("Sameer Pujar <spujar@nvidia.com>");