diff options
Diffstat (limited to 'arch/arm/mach-omap2/mcbsp.c')
| -rw-r--r-- | arch/arm/mach-omap2/mcbsp.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/mcbsp.c b/arch/arm/mach-omap2/mcbsp.c index d6cce00a730..92bd5e22a24 100644 --- a/arch/arm/mach-omap2/mcbsp.c +++ b/arch/arm/mach-omap2/mcbsp.c @@ -27,6 +27,13 @@ #include "control.h" +/* + * FIXME: Find a mechanism to enable/disable runtime the McBSP ICLK autoidle. + * Sidetone needs non-gated ICLK and sidetone autoidle is broken. + */ +#include "cm2xxx_3xxx.h" +#include "cm-regbits-34xx.h" + /* McBSP internal signal muxing functions */ void omap2_mcbsp1_mux_clkr_src(u8 mux) @@ -102,6 +109,24 @@ int omap2_mcbsp_set_clks_src(u8 id, u8 fck_src_id) } EXPORT_SYMBOL(omap2_mcbsp_set_clks_src); +static int omap3_enable_st_clock(unsigned int id, bool enable) +{ + unsigned int w; + + /* + * Sidetone uses McBSP ICLK - which must not idle when sidetones + * are enabled or sidetones start sounding ugly. + */ + w = omap2_cm_read_mod_reg(OMAP3430_PER_MOD, CM_AUTOIDLE); + if (enable) + w &= ~(1 << (id - 2)); + else + w |= 1 << (id - 2); + omap2_cm_write_mod_reg(w, OMAP3430_PER_MOD, CM_AUTOIDLE); + + return 0; +} + struct omap_device_pm_latency omap2_mcbsp_latency[] = { { .deactivate_func = omap_device_idle_hwmods, @@ -151,6 +176,7 @@ static int omap_init_mcbsp(struct omap_hwmod *oh, void *unused) if (oh->dev_attr) { oh_device[1] = omap_hwmod_lookup(( (struct omap_mcbsp_dev_attr *)(oh->dev_attr))->sidetone); + pdata->enable_st_clock = omap3_enable_st_clock; count++; } pdev = omap_device_build_ss(name, id, oh_device, count, pdata, |