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authorHans-Christian Egtvedt <hcegtvedt@atmel.com>2007-07-23 16:01:38 +0200
committerJaroslav Kysela <perex@perex.cz>2007-10-16 15:57:50 +0200
commiteafe57084786d5711e434165297f13864697f9f9 (patch)
treea3b6a8cd16caf2396917cea765f1c35f478c99bb /include/linux/spi
parent3b0a899ca0fca7801127757cfaafb4d8671793f0 (diff)
downloadop-kernel-dev-eafe57084786d5711e434165297f13864697f9f9.zip
op-kernel-dev-eafe57084786d5711e434165297f13864697f9f9.tar.gz
[ALSA] ALSA sound driver for the AT73C213 DAC using Atmel SSC driver
This patch adds support for the AT73C213 DAC using the misc Atmel SSC driver in I2S mode. The driver also requires a SPI to setup the registers and control volume. It has been tested with an AT32AP7000 on the ATSTK1000 development board. The driver should also work with any Atmel device with an SSC module supported by the Atmel SSC driver (atmel-ssc). The atmel-ssc driver is just submitted to the Linux kernel. Please see mail thread http://lkml.org/lkml/2007/7/16/32 Signed-off-by: Hans-Christian Egtvedt <hcegtvedt@atmel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Diffstat (limited to 'include/linux/spi')
-rw-r--r--include/linux/spi/at73c213.h25
1 files changed, 25 insertions, 0 deletions
diff --git a/include/linux/spi/at73c213.h b/include/linux/spi/at73c213.h
new file mode 100644
index 0000000..0f20a70e
--- /dev/null
+++ b/include/linux/spi/at73c213.h
@@ -0,0 +1,25 @@
+/*
+ * Board-specific data used to set up AT73c213 audio DAC driver.
+ */
+
+#ifndef __LINUX_SPI_AT73C213_H
+#define __LINUX_SPI_AT73C213_H
+
+/**
+ * at73c213_board_info - how the external DAC is wired to the device.
+ *
+ * @ssc_id: SSC platform_driver id the DAC shall use to stream the audio.
+ * @dac_clk: the external clock used to provide master clock to the DAC.
+ * @shortname: a short discription for the DAC, seen by userspace tools.
+ *
+ * This struct contains the configuration of the hardware connection to the
+ * external DAC. The DAC needs a master clock and a I2S audio stream. It also
+ * provides a name which is used to identify it in userspace tools.
+ */
+struct at73c213_board_info {
+ int ssc_id;
+ struct clk *dac_clk;
+ char shortname[32];
+};
+
+#endif /* __LINUX_SPI_AT73C213_H */
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