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ASoC: fsi: add master clock control functions

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Current FSI driver required set_rate() platform callback function
to set audio clock if it was master mode,
because it seemed that CPG/FSI-DIV clocks calculation depend on
platform/board/cpu.
But it was calculable regardless of platform.
This patch supports audio clock calculation method,
but the sampling rate under 32kHz is not supported at this point.
Old type set_rate() is still supported now,
but it will be deleted on next version

Signed-off-by: Kuninori Morimoto <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
This commit is contained in:
Kuninori Morimoto 2012-11-05 18:30:38 -08:00 • committed by Mark Brown
commit ab6f6d8521
2 changed files with 378 additions and 6 deletions
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6
include/sound/sh_fsi.h
View file

@ -26,6 +26,7 @@
* A: inversion
* B: format mode
* C: chip specific
* D: clock selecter if master mode
*/
/* A: clock inversion */
@ -44,6 +45,11 @@
#define SH_FSI_OPTION_MASK 0x00000F00
#define SH_FSI_ENABLE_STREAM_MODE (1 << 8) /* for 16bit data */
/* D: clock selecter if master mode */
#define SH_FSI_CLK_MASK 0x0000F000
#define SH_FSI_CLK_EXTERNAL (1 << 12)
#define SH_FSI_CLK_CPG (2 << 12) /* FSIxCK + FSI-DIV */
/*
* set_rate return value
*