1 files changed, 10 insertions, 0 deletions

diff --git a/sound/soc/omap/mcbsp.c b/sound/soc/omap/mcbsp.c
index d7167932113a..21dbb0532bca 100644
--- a/sound/soc/omap/mcbsp.c
+++ b/sound/soc/omap/mcbsp.c
@@ -548,6 +548,16 @@ void omap_mcbsp_free(struct omap_mcbsp *mcbsp)
 
         reg_cache = mcbsp->reg_cache;
 
+        /*
+         * Select CLKS source from internal source unconditionally before
+         * marking the McBSP port as free.
+         * If the external clock source via MCBSP_CLKS pin has been selected the
+         * system will refuse to enter idle if the CLKS pin source is not reset
+         * back to internal source.
+         */
+        if (!cpu_class_is_omap1())
+                omap2_mcbsp_set_clks_src(mcbsp, MCBSP_CLKS_PRCM_SRC);
+
         spin_lock(&mcbsp->lock);
         if (mcbsp->free)
                 dev_err(mcbsp->dev, "McBSP%d was not reserved\n", mcbsp->id);