Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / sound / soc / samsung / snow.c

diff --git a/kernel/sound/soc/samsung/snow.c b/kernel/sound/soc/samsung/snow.c
new file mode 100644 (file)
index 0000000..7651dc9
--- /dev/null
+++ b/kernel/sound/soc/samsung/snow.c
@@ -0,0 +1,127 @@
+/*
+ * ASoC machine driver for Snow boards
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+
+#include <sound/soc.h>
+
+#include "i2s.h"
+
+#define FIN_PLL_RATE           24000000
+
+static struct snd_soc_dai_link snow_dai[] = {
+       {
+               .name = "Primary",
+               .stream_name = "Primary",
+               .codec_dai_name = "HiFi",
+               .dai_fmt = SND_SOC_DAIFMT_I2S |
+                               SND_SOC_DAIFMT_NB_NF |
+                               SND_SOC_DAIFMT_CBS_CFS,
+       },
+};
+
+static int snow_late_probe(struct snd_soc_card *card)
+{
+       struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai;
+       struct snd_soc_dai *cpu_dai = card->rtd[0].cpu_dai;
+       int ret;
+
+       /* Set the MCLK rate for the codec */
+       ret = snd_soc_dai_set_sysclk(codec_dai, 0,
+                                       FIN_PLL_RATE, SND_SOC_CLOCK_IN);
+       if (ret < 0)
+               return ret;
+
+       /* Select I2S Bus clock to set RCLK and BCLK */
+       ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_RCLKSRC_0,
+                                       0, SND_SOC_CLOCK_IN);
+       if (ret < 0)
+               return ret;
+
+       return 0;
+}
+
+static struct snd_soc_card snow_snd = {
+       .name = "Snow-I2S",
+       .dai_link = snow_dai,
+       .num_links = ARRAY_SIZE(snow_dai),
+
+       .late_probe = snow_late_probe,
+};
+
+static int snow_probe(struct platform_device *pdev)
+{
+       struct snd_soc_card *card = &snow_snd;
+       struct device_node *i2s_node, *codec_node;
+       int i, ret;
+
+       i2s_node = of_parse_phandle(pdev->dev.of_node,
+                                   "samsung,i2s-controller", 0);
+       if (!i2s_node) {
+               dev_err(&pdev->dev,
+                       "Property 'i2s-controller' missing or invalid\n");
+               return -EINVAL;
+       }
+
+       codec_node = of_parse_phandle(pdev->dev.of_node,
+                                     "samsung,audio-codec", 0);
+       if (!codec_node) {
+               dev_err(&pdev->dev,
+                       "Property 'audio-codec' missing or invalid\n");
+               return -EINVAL;
+       }
+
+       for (i = 0; i < ARRAY_SIZE(snow_dai); i++) {
+               snow_dai[i].codec_of_node = codec_node;
+               snow_dai[i].cpu_of_node = i2s_node;
+               snow_dai[i].platform_of_node = i2s_node;
+       }
+
+       card->dev = &pdev->dev;
+
+       /* Update card-name if provided through DT, else use default name */
+       snd_soc_of_parse_card_name(card, "samsung,model");
+
+       ret = devm_snd_soc_register_card(&pdev->dev, card);
+       if (ret) {
+               dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
+               return ret;
+       }
+
+       return ret;
+}
+
+static const struct of_device_id snow_of_match[] = {
+       { .compatible = "google,snow-audio-max98090", },
+       { .compatible = "google,snow-audio-max98091", },
+       { .compatible = "google,snow-audio-max98095", },
+       {},
+};
+MODULE_DEVICE_TABLE(of, snow_of_match);
+
+static struct platform_driver snow_driver = {
+       .driver = {
+               .name = "snow-audio",
+               .pm = &snd_soc_pm_ops,
+               .of_match_table = snow_of_match,
+       },
+       .probe = snow_probe,
+};
+
+module_platform_driver(snow_driver);
+
+MODULE_DESCRIPTION("ALSA SoC Audio machine driver for Snow");
+MODULE_LICENSE("GPL");