diff options
Diffstat (limited to 'arch/arm/plat-omap')
| -rw-r--r-- | arch/arm/plat-omap/mcbsp.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/arch/arm/plat-omap/mcbsp.c b/arch/arm/plat-omap/mcbsp.c index e31496e35b0f..ecbfe398a309 100644 --- a/arch/arm/plat-omap/mcbsp.c +++ b/arch/arm/plat-omap/mcbsp.c @@ -878,7 +878,7 @@ EXPORT_SYMBOL(omap_mcbsp_free); void omap_mcbsp_start(unsigned int id, int tx, int rx) { struct omap_mcbsp *mcbsp; - int idle; + int enable_srg = 0; u16 w; if (!omap_mcbsp_check_valid_id(id)) { @@ -893,10 +893,13 @@ void omap_mcbsp_start(unsigned int id, int tx, int rx) mcbsp->rx_word_length = (MCBSP_READ_CACHE(mcbsp, RCR1) >> 5) & 0x7; mcbsp->tx_word_length = (MCBSP_READ_CACHE(mcbsp, XCR1) >> 5) & 0x7; - idle = !((MCBSP_READ_CACHE(mcbsp, SPCR2) | - MCBSP_READ_CACHE(mcbsp, SPCR1)) & 1); + /* Only enable SRG, if McBSP is master */ + w = MCBSP_READ_CACHE(mcbsp, PCR0); + if (w & (FSXM | FSRM | CLKXM | CLKRM)) + enable_srg = !((MCBSP_READ_CACHE(mcbsp, SPCR2) | + MCBSP_READ_CACHE(mcbsp, SPCR1)) & 1); - if (idle) { + if (enable_srg) { /* Start the sample generator */ w = MCBSP_READ_CACHE(mcbsp, SPCR2); MCBSP_WRITE(mcbsp, SPCR2, w | (1 << 6)); @@ -919,7 +922,7 @@ void omap_mcbsp_start(unsigned int id, int tx, int rx) */ udelay(500); - if (idle) { + if (enable_srg) { /* Start frame sync */ w = MCBSP_READ_CACHE(mcbsp, SPCR2); MCBSP_WRITE(mcbsp, SPCR2, w | (1 << 7)); |