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authorRaffaele Recalcati <raffaele.recalcati@bticino.it>2010-07-06 12:39:04 +0400
committerMark Brown <broonie@opensource.wolfsonmicro.com>2010-07-06 18:54:07 +0400
commitd9823ed9fa3126097dfd2bbce6dc33957c1be728 (patch)
treea929aead29f43232b408b182ce5a5e5e4c8654a0 /init
parentec6375533748806a1a49dad7ce124cc02886854a (diff)
downloadlinux-d9823ed9fa3126097dfd2bbce6dc33957c1be728.tar.xz
ASoC: DaVinci: More accurate continuous serial clock for McBSP (I2S)
i2s_accurate_sck switch can be used to have a better approximate sampling frequency. The clock is an externally visible bit clock and it is named i2s continuous serial clock (I2S_SCK). The trade off is between more accurate clock (fast clock) and less accurate clock (slow clock). The waveform will be not symmetric. Probably it is possible to get a better algorithm for calculating the divider, trying to keep a slower clock as possible. This patch has been developed against the http://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-davinci.git git tree and has been tested on bmx board (similar to dm365 evm, but using uda1345 as external audio codec). Signed-off-by: Raffaele Recalcati <raffaele.recalcati@bticino.it> Signed-off-by: Davide Bonfanti <davide.bonfanti@bticino.it> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Acked-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
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