4 bool "Enable sound support"
6 Support making sounds through an audio codec. This is normally a
7 beep at a chosen frequency for a selected length of time. However
8 the drivers support playing arbitrary sound samples using a
11 Note: At present the sound setup is somewhat tangled up in that the
12 audio codecs are called from the sound-i2s code. This could be
13 converted to driver model.
16 bool "Enable I2S support"
19 I2S is a serial bus often used to transmit audio data from the
20 SoC to the audio codec. This option enables sound support using
21 I2S. It calls either of the two supported codecs (no use is made
22 of driver model at present).
25 bool "Enable I2S support for Rockchip SoCs"
28 Rockchip SoCs support an I2S interface for sending audio data to an
29 audio codec. This option enables support for this, using one of the
30 available audio codec drivers. This driver does not make use of
31 DMA, but writes each word directly to the hardware.
34 bool "Enable I2C support for Samsung SoCs"
37 Samsung Exynos SoCs support an I2S interface for sending audio
38 data to an audio codec. This option enables support for this,
39 using one of the available audio codec drivers. Enabling this
40 option provides an implementation for sound_init() and
43 config SOUND_INTEL_HDA
44 bool "Intel HDA audio codec"
47 Most Intel chips have an HDA (High-definition audio) codec which can
48 be used by U-Boot to play simple beeps. This is also sometimes called
49 Azalia which was the development code-name. It requires setup
50 information in the device tree (see intel-hda.txt).
52 config SOUND_IVYBRIDGE
53 bool "Intel Ivybridge sound support"
55 select SOUND_INTEL_HDA
57 Enable sound output on supported Intel Ivybridge-based boards. This
58 driver uses Intel's High-definition Audio (HDA) architecture,
59 sometimes called Azalia. The audio codec is detected using a
60 semi-automatic mechanism.
63 bool "Support Maxim max98088 audio codec"
66 Enable the max98088 audio codec. This is connected via I2S for
67 audio data and I2C for codec control. At present it only works
68 with the Samsung I2S driver.
71 bool "Support Maxim max98090 audio codec"
74 Enable the max98090 audio codec. This is connected via I2S for
75 audio data and I2C for codec control. At present it only works
76 with the Samsung I2S driver.
79 bool "Support Maxim max98095 audio codec"
82 Enable the max98095 audio codec. This is connected via I2S for
83 audio data and I2C for codec control. At present it only works
84 with the Samsung I2S driver.
87 bool "Support sandbox emulated audio codec"
88 depends on SANDBOX && SOUND
90 U-Boot sandbox can emulate a sound device using SDL, playing the
91 sound on the host machine. This option implements the sound_init()
92 and sound_play() functions for sandbox. Note that you must install
93 the SDL libraries for this to work.
96 bool "Support Wolfson Micro wm8994 audio codec"
97 depends on I2S_SAMSUNG
99 Enable the wm8994 audio codec. This is connected via I2S for
100 audio data and I2C for codec control. At present it only works
101 with the Samsung I2S driver.