[U-Boot] [PATCH v2 07/22] dm: sound: Create a uclass for sound

[sjg at google.com]

The sound driver pulls together the audio codec and i2s drivers in order
to actually make sounds. It supports setup() and play() methods. The
sound_find_codec_i2s() function allows locating the linked codec and i2s
devices. They can be referred to from uclass-private data.

Add a uclass and a test for sound.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

Changes in v2:
- Update 'init' command to print the error code

 arch/sandbox/dts/test.dts       |  11 +++
 arch/sandbox/include/asm/test.h |  20 +++++
 cmd/sound.c                     |  23 +++++-
 drivers/sound/Makefile          |   1 +
 drivers/sound/sandbox.c         |  67 +++++++++++++++++
 drivers/sound/sound-uclass.c    | 127 ++++++++++++++++++++++++++++++++
 include/dm/uclass-id.h          |   1 +
 include/sound.h                 |  70 +++++++++++++++++-
 test/dm/Makefile                |   1 +
 test/dm/sound.c                 |  34 +++++++++
 10 files changed, 351 insertions(+), 4 deletions(-)
 create mode 100644 drivers/sound/sound-uclass.c
 create mode 100644 test/dm/sound.c

Applied to u-boot-dm/master