ASoC: dio2125: add dio2125 amp driver
The dio2125 is a stereo output driver with adjustable gain.
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/sound/soc/codecs/dio2125.c b/sound/soc/codecs/dio2125.c
new file mode 100644
index 0000000..015e310
--- /dev/null
+++ b/sound/soc/codecs/dio2125.c
@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2017 BayLibre, SAS.
+ * Author: Jerome Brunet <jbrunet@baylibre.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ * The full GNU General Public License is included in this distribution
+ * in the file called COPYING.
+ */
+
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <sound/soc.h>
+
+#define DRV_NAME "dio2125"
+
+struct dio2125 {
+ struct gpio_desc *gpiod_enable;
+};
+
+static int drv_event(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *control, int event)
+{
+ struct snd_soc_component *c = snd_soc_dapm_to_component(w->dapm);
+ struct dio2125 *priv = snd_soc_component_get_drvdata(c);
+ int val;
+
+ switch (event) {
+ case SND_SOC_DAPM_POST_PMU:
+ val = 1;
+ break;
+ case SND_SOC_DAPM_PRE_PMD:
+ val = 0;
+ break;
+ default:
+ WARN(1, "Unexpected event");
+ return -EINVAL;
+ }
+
+ gpiod_set_value(priv->gpiod_enable, val);
+
+ return 0;
+}
+
+static const struct snd_soc_dapm_widget dio2125_dapm_widgets[] = {
+ SND_SOC_DAPM_INPUT("INL"),
+ SND_SOC_DAPM_INPUT("INR"),
+ SND_SOC_DAPM_OUT_DRV_E("DRV", SND_SOC_NOPM, 0, 0, NULL, 0, drv_event,
+ (SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD)),
+ SND_SOC_DAPM_OUTPUT("OUTL"),
+ SND_SOC_DAPM_OUTPUT("OUTR"),
+};
+
+static const struct snd_soc_dapm_route dio2125_dapm_routes[] = {
+ { "DRV", NULL, "INL" },
+ { "DRV", NULL, "INR" },
+ { "OUTL", NULL, "DRV" },
+ { "OUTR", NULL, "DRV" },
+};
+
+static const struct snd_soc_component_driver dio2125_component_driver = {
+ .dapm_widgets = dio2125_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(dio2125_dapm_widgets),
+ .dapm_routes = dio2125_dapm_routes,
+ .num_dapm_routes = ARRAY_SIZE(dio2125_dapm_routes),
+};
+
+static int dio2125_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct dio2125 *priv;
+ int err;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (priv == NULL)
+ return -ENOMEM;
+ platform_set_drvdata(pdev, priv);
+
+ priv->gpiod_enable = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
+ if (IS_ERR(priv->gpiod_enable)) {
+ err = PTR_ERR(priv->gpiod_enable);
+ if (err != -EPROBE_DEFER)
+ dev_err(dev, "Failed to get 'enable' gpio: %d", err);
+ return err;
+ }
+
+ return devm_snd_soc_register_component(dev, &dio2125_component_driver,
+ NULL, 0);
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id dio2125_ids[] = {
+ { .compatible = "dioo,dio2125", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, dio2125_ids);
+#endif
+
+static struct platform_driver dio2125_driver = {
+ .driver = {
+ .name = DRV_NAME,
+ .of_match_table = of_match_ptr(dio2125_ids),
+ },
+ .probe = dio2125_probe,
+};
+
+module_platform_driver(dio2125_driver);
+
+MODULE_DESCRIPTION("ASoC DIO2125 output driver");
+MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
+MODULE_LICENSE("GPL");