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ASoC: fsl-ssi: add SSIEN errata work around

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The chip errata for the i.MX35, Rev.2 has the following errata:

ENGcm06222: SSI:Transmission does not take place in bit length early frame sync
	    configuration

The workaround states, that TX_EN and SSI_EN bits should be set in the same
register write. As the next errata in the document (ENGcm06532) says to always
write RX_EN and TX_EN in the same register write in network mode.

Therefore include the whole write to
	CCSR_SSI_SCR_TE and CCSR_SSI_SCR_RE
into the write to
	CCSR_SSI_SCR_SSIEN

Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Steffen Trumtrar 2013-08-19 17:05:59 +02:00 committed by Mark Brown
parent cd7f0295aa
commit f8fdf5375e
1 changed files with 4 additions and 7 deletions
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11
sound/soc/fsl/fsl_ssi.c
View File

@ -424,15 +424,12 @@ static int fsl_ssi_setup(struct fsl_ssi_private *ssi_private)
write_ssi(0x300, &ssi->saccen);
/*
* Enable SSI
* Enable SSI, Transmit and Receive
*/
write_ssi_mask(&ssi->scr, 0, CCSR_SSI_SCR_SSIEN);
write_ssi(CCSR_SSI_SOR_WAIT(3), &ssi->sor);
write_ssi_mask(&ssi->scr, 0, CCSR_SSI_SCR_SSIEN |
CCSR_SSI_SCR_TE | CCSR_SSI_SCR_RE);
/*
* Enable Transmit and Receive
*/
write_ssi_mask(&ssi->scr, 0, CCSR_SSI_SCR_TE | CCSR_SSI_SCR_RE);
write_ssi(CCSR_SSI_SOR_WAIT(3), &ssi->sor);
}
return 0;