summaryrefslogtreecommitdiffstats
path: root/kernel/sound/soc/codecs/adau1761-spi.c
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/sound/soc/codecs/adau1761-spi.c')
-rw-r--r--kernel/sound/soc/codecs/adau1761-spi.c77
1 files changed, 77 insertions, 0 deletions
diff --git a/kernel/sound/soc/codecs/adau1761-spi.c b/kernel/sound/soc/codecs/adau1761-spi.c
new file mode 100644
index 000000000..cce2f11f1
--- /dev/null
+++ b/kernel/sound/soc/codecs/adau1761-spi.c
@@ -0,0 +1,77 @@
+/*
+ * Driver for ADAU1761/ADAU1461/ADAU1761/ADAU1961 codec
+ *
+ * Copyright 2014 Analog Devices Inc.
+ * Author: Lars-Peter Clausen <lars@metafoo.de>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/spi/spi.h>
+#include <sound/soc.h>
+
+#include "adau1761.h"
+
+static void adau1761_spi_switch_mode(struct device *dev)
+{
+ struct spi_device *spi = to_spi_device(dev);
+
+ /*
+ * To get the device into SPI mode CLATCH has to be pulled low three
+ * times. Do this by issuing three dummy reads.
+ */
+ spi_w8r8(spi, 0x00);
+ spi_w8r8(spi, 0x00);
+ spi_w8r8(spi, 0x00);
+}
+
+static int adau1761_spi_probe(struct spi_device *spi)
+{
+ const struct spi_device_id *id = spi_get_device_id(spi);
+ struct regmap_config config;
+
+ if (!id)
+ return -EINVAL;
+
+ config = adau1761_regmap_config;
+ config.val_bits = 8;
+ config.reg_bits = 24;
+ config.read_flag_mask = 0x1;
+
+ return adau1761_probe(&spi->dev,
+ devm_regmap_init_spi(spi, &config),
+ id->driver_data, adau1761_spi_switch_mode);
+}
+
+static int adau1761_spi_remove(struct spi_device *spi)
+{
+ snd_soc_unregister_codec(&spi->dev);
+ return 0;
+}
+
+static const struct spi_device_id adau1761_spi_id[] = {
+ { "adau1361", ADAU1361 },
+ { "adau1461", ADAU1761 },
+ { "adau1761", ADAU1761 },
+ { "adau1961", ADAU1361 },
+ { }
+};
+MODULE_DEVICE_TABLE(spi, adau1761_spi_id);
+
+static struct spi_driver adau1761_spi_driver = {
+ .driver = {
+ .name = "adau1761",
+ .owner = THIS_MODULE,
+ },
+ .probe = adau1761_spi_probe,
+ .remove = adau1761_spi_remove,
+ .id_table = adau1761_spi_id,
+};
+module_spi_driver(adau1761_spi_driver);
+
+MODULE_DESCRIPTION("ASoC ADAU1361/ADAU1461/ADAU1761/ADAU1961 CODEC SPI driver");
+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
+MODULE_LICENSE("GPL");