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/Kconfig b/sound/soc/codecs/Kconfig
index e49e9da..5e5fcb6 100644 (file)
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -69,6 +69,7 @@ config SND_SOC_ALL_CODECS
        select SND_SOC_DA7219 if I2C
        select SND_SOC_DA732X if I2C
        select SND_SOC_DA9055 if I2C
+       select SND_SOC_DIO2125
        select SND_SOC_DMIC
        select SND_SOC_ES8328_SPI if SPI_MASTER
        select SND_SOC_ES8328_I2C if I2C
@@ -516,6 +517,10 @@ config SND_SOC_DA732X
 config SND_SOC_DA9055
        tristate
 
+config SND_SOC_DIO2125
+       tristate "Dioo DIO2125 Amplifier"
+       select GPIOLIB
+
 config SND_SOC_DMIC
        tristate
 

diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index 1796cb9..04894fa 100644 (file)
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -221,6 +221,7 @@ snd-soc-wm9712-objs := wm9712.o
 snd-soc-wm9713-objs := wm9713.o
 snd-soc-wm-hubs-objs := wm_hubs.o
 # Amp
+snd-soc-dio2125-objs := dio2125.o
 snd-soc-max9877-objs := max9877.o
 snd-soc-max98504-objs := max98504.o
 snd-soc-tpa6130a2-objs := tpa6130a2.o
@@ -448,6 +449,7 @@ obj-$(CONFIG_SND_SOC_WM_ADSP)       += snd-soc-wm-adsp.o
 obj-$(CONFIG_SND_SOC_WM_HUBS)  += snd-soc-wm-hubs.o
 
 # Amp
+obj-$(CONFIG_SND_SOC_DIO2125)  += snd-soc-dio2125.o
 obj-$(CONFIG_SND_SOC_MAX9877)  += snd-soc-max9877.o
 obj-$(CONFIG_SND_SOC_MAX98504) += snd-soc-max98504.o
 obj-$(CONFIG_SND_SOC_TPA6130A2)        += snd-soc-tpa6130a2.o

diff --git a/sound/soc/codecs/dio2125.c b/sound/soc/codecs/dio2125.c
new file mode 100644 (file)
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");