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authorTakashi Iwai <tiwai@suse.de>2014-06-03 11:51:14 +0200
committerTakashi Iwai <tiwai@suse.de>2014-06-03 11:51:14 +0200
commit8743dcd6639c28204ac03fb3e9db7932e3d85418 (patch)
tree53b80846cf6731ddb196d522ed2bbf0f76da8344 /sound/soc/codecs/adau1781-spi.c
parentMerge branch 'for-linus' into for-next (diff)
parentASoC: free jack GPIOs before the sound card is freed (diff)
downloadlinux-8743dcd6639c28204ac03fb3e9db7932e3d85418.tar.xz
linux-8743dcd6639c28204ac03fb3e9db7932e3d85418.zip
Merge tag 'asoc-v3.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-next
ASoC: Final updates for v3.16 A few more updates from the last week of development, nothing too exciting. Highlights include: - GPIO descriptor support for jacks - More updates and fixes to the Freescale SSI, Intel and rsnd drivers. - New drivers for Analog Devices ADAU1361, ADAU1381, ADAU1761 and ADAU1781, and Realtek RT5677.
Diffstat (limited to 'sound/soc/codecs/adau1781-spi.c')
-rw-r--r--sound/soc/codecs/adau1781-spi.c75
1 files changed, 75 insertions, 0 deletions
diff --git a/sound/soc/codecs/adau1781-spi.c b/sound/soc/codecs/adau1781-spi.c
new file mode 100644
index 000000000000..194686716bbe
--- /dev/null
+++ b/sound/soc/codecs/adau1781-spi.c
@@ -0,0 +1,75 @@
+/*
+ * Driver for ADAU1381/ADAU1781 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 "adau1781.h"
+
+static void adau1781_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 adau1781_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 = adau1781_regmap_config;
+ config.val_bits = 8;
+ config.reg_bits = 24;
+ config.read_flag_mask = 0x1;
+
+ return adau1781_probe(&spi->dev,
+ devm_regmap_init_spi(spi, &config),
+ id->driver_data, adau1781_spi_switch_mode);
+}
+
+static int adau1781_spi_remove(struct spi_device *spi)
+{
+ snd_soc_unregister_codec(&spi->dev);
+ return 0;
+}
+
+static const struct spi_device_id adau1781_spi_id[] = {
+ { "adau1381", ADAU1381 },
+ { "adau1781", ADAU1781 },
+ { }
+};
+MODULE_DEVICE_TABLE(spi, adau1781_spi_id);
+
+static struct spi_driver adau1781_spi_driver = {
+ .driver = {
+ .name = "adau1781",
+ .owner = THIS_MODULE,
+ },
+ .probe = adau1781_spi_probe,
+ .remove = adau1781_spi_remove,
+ .id_table = adau1781_spi_id,
+};
+module_spi_driver(adau1781_spi_driver);
+
+MODULE_DESCRIPTION("ASoC ADAU1381/ADAU1781 CODEC SPI driver");
+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
+MODULE_LICENSE("GPL");