From: Eero Nurkkala <[email protected]> McBSP fclk must be maintained for the duration of audio playback or recording. Otherwise the fclk may get autogated when the PER96M clk is no longer required by other modules. This results in audio playback being hang. Fix this phenomenom by enabling the McBSP fclk clockactivity bit for the entire active duration of McBSP usage
Signed-off-by: Eero Nurkkala <[email protected]> --- arch/arm/plat-omap/include/mach/mcbsp.h | 1 + arch/arm/plat-omap/mcbsp.c | 6 +++--- 2 files changed, 4 insertions(+), 3 deletions(-) diff --git a/arch/arm/plat-omap/include/mach/mcbsp.h b/arch/arm/plat-omap/include/mach/mcbsp.h index 26bde05..ec61b89 100644 --- a/arch/arm/plat-omap/include/mach/mcbsp.h +++ b/arch/arm/plat-omap/include/mach/mcbsp.h @@ -252,6 +252,7 @@ #define RDISABLE 0x0001 /********************** McBSP SYSCONFIG bit definitions ********************/ +#define CLOCKACTIVITY(value) ((value)<<8) #define SIDLEMODE(value) ((value)<<3) #define ENAWAKEUP 0x0004 #define SOFTRST 0x0002 diff --git a/arch/arm/plat-omap/mcbsp.c b/arch/arm/plat-omap/mcbsp.c index a94d03e..59850c2 100644 --- a/arch/arm/plat-omap/mcbsp.c +++ b/arch/arm/plat-omap/mcbsp.c @@ -248,8 +248,8 @@ int omap_mcbsp_request(unsigned int id) u16 w; w = OMAP_MCBSP_READ(mcbsp->io_base, SYSCON); - w &= ~(ENAWAKEUP | SIDLEMODE(0x03)); - w |= (ENAWAKEUP | SIDLEMODE(0x02)); + w &= ~(ENAWAKEUP | SIDLEMODE(0x03) | CLOCKACTIVITY(0x03)); + w |= (ENAWAKEUP | SIDLEMODE(0x02) | CLOCKACTIVITY(0x01)); OMAP_MCBSP_WRITE(mcbsp->io_base, SYSCON, w); OMAP_MCBSP_WRITE(mcbsp->io_base, WAKEUPEN, WAKEUPEN_ALL); @@ -308,7 +308,7 @@ void omap_mcbsp_free(unsigned int id) u16 w; w = OMAP_MCBSP_READ(mcbsp->io_base, SYSCON); - w &= ~(ENAWAKEUP | SIDLEMODE(0x03)); + w &= ~(ENAWAKEUP | SIDLEMODE(0x03) | CLOCKACTIVITY(0x03)); OMAP_MCBSP_WRITE(mcbsp->io_base, SYSCON, w); w = OMAP_MCBSP_READ(mcbsp->io_base, WAKEUPEN); -- 1.5.2 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
