v4.19.13 snapshot.
diff --git a/sound/soc/codecs/ac97.c b/sound/soc/codecs/ac97.c
new file mode 100644
index 0000000..02b4d01
--- /dev/null
+++ b/sound/soc/codecs/ac97.c
@@ -0,0 +1,154 @@
+/*
+ * ac97.c -- ALSA Soc AC97 codec support
+ *
+ * Copyright 2005 Wolfson Microelectronics PLC.
+ * Author: Liam Girdwood <lrg@slimlogic.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * Generic AC97 support.
+ */
+
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/ac97_codec.h>
+#include <sound/initval.h>
+#include <sound/soc.h>
+
+static const struct snd_soc_dapm_widget ac97_widgets[] = {
+ SND_SOC_DAPM_INPUT("RX"),
+ SND_SOC_DAPM_OUTPUT("TX"),
+};
+
+static const struct snd_soc_dapm_route ac97_routes[] = {
+ { "AC97 Capture", NULL, "RX" },
+ { "TX", NULL, "AC97 Playback" },
+};
+
+static int ac97_prepare(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_component *component = dai->component;
+ struct snd_ac97 *ac97 = snd_soc_component_get_drvdata(component);
+
+ int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
+ AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
+ return snd_ac97_set_rate(ac97, reg, substream->runtime->rate);
+}
+
+static const struct snd_soc_dai_ops ac97_dai_ops = {
+ .prepare = ac97_prepare,
+};
+
+static struct snd_soc_dai_driver ac97_dai = {
+ .name = "ac97-hifi",
+ .playback = {
+ .stream_name = "AC97 Playback",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_KNOT,
+ .formats = SND_SOC_STD_AC97_FMTS,},
+ .capture = {
+ .stream_name = "AC97 Capture",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_KNOT,
+ .formats = SND_SOC_STD_AC97_FMTS,},
+ .ops = &ac97_dai_ops,
+};
+
+static int ac97_soc_probe(struct snd_soc_component *component)
+{
+ struct snd_ac97 *ac97;
+ struct snd_ac97_bus *ac97_bus;
+ struct snd_ac97_template ac97_template;
+ int ret;
+
+ /* add codec as bus device for standard ac97 */
+ ret = snd_ac97_bus(component->card->snd_card, 0, soc_ac97_ops,
+ NULL, &ac97_bus);
+ if (ret < 0)
+ return ret;
+
+ memset(&ac97_template, 0, sizeof(struct snd_ac97_template));
+ ret = snd_ac97_mixer(ac97_bus, &ac97_template, &ac97);
+ if (ret < 0)
+ return ret;
+
+ snd_soc_component_set_drvdata(component, ac97);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int ac97_soc_suspend(struct snd_soc_component *component)
+{
+ struct snd_ac97 *ac97 = snd_soc_component_get_drvdata(component);
+
+ snd_ac97_suspend(ac97);
+
+ return 0;
+}
+
+static int ac97_soc_resume(struct snd_soc_component *component)
+{
+
+ struct snd_ac97 *ac97 = snd_soc_component_get_drvdata(component);
+
+ snd_ac97_resume(ac97);
+
+ return 0;
+}
+#else
+#define ac97_soc_suspend NULL
+#define ac97_soc_resume NULL
+#endif
+
+static const struct snd_soc_component_driver soc_component_dev_ac97 = {
+ .probe = ac97_soc_probe,
+ .suspend = ac97_soc_suspend,
+ .resume = ac97_soc_resume,
+ .dapm_widgets = ac97_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(ac97_widgets),
+ .dapm_routes = ac97_routes,
+ .num_dapm_routes = ARRAY_SIZE(ac97_routes),
+ .idle_bias_on = 1,
+ .use_pmdown_time = 1,
+ .endianness = 1,
+ .non_legacy_dai_naming = 1,
+};
+
+static int ac97_probe(struct platform_device *pdev)
+{
+ return devm_snd_soc_register_component(&pdev->dev,
+ &soc_component_dev_ac97, &ac97_dai, 1);
+}
+
+static int ac97_remove(struct platform_device *pdev)
+{
+ return 0;
+}
+
+static struct platform_driver ac97_codec_driver = {
+ .driver = {
+ .name = "ac97-codec",
+ },
+
+ .probe = ac97_probe,
+ .remove = ac97_remove,
+};
+
+module_platform_driver(ac97_codec_driver);
+
+MODULE_DESCRIPTION("Soc Generic AC97 driver");
+MODULE_AUTHOR("Liam Girdwood");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:ac97-codec");