ARM: OMAP4+: AESS: enable internal auto-gating during initial setup

[firefly-linux-kernel-4.4.55.git] / arch / arm / mach-omap2 / omap_hwmod_reset.c

diff --git a/arch/arm/mach-omap2/omap_hwmod_reset.c b/arch/arm/mach-omap2/omap_hwmod_reset.c
new file mode 100644 (file)
index 0000000..bba43fa
--- /dev/null
+++ b/arch/arm/mach-omap2/omap_hwmod_reset.c
@@ -0,0 +1,52 @@
+/*
+ * OMAP IP block custom reset and preprogramming stubs
+ *
+ * Copyright (C) 2012 Texas Instruments, Inc.
+ * Paul Walmsley
+ *
+ * A small number of IP blocks need custom reset and preprogramming
+ * functions.  The stubs in this file provide a standard way for the
+ * hwmod code to call these functions, which are to be located under
+ * drivers/.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+#include <linux/kernel.h>
+
+#include <sound/aess.h>
+
+#include "omap_hwmod.h"
+
+/**
+ * omap_hwmod_aess_preprogram - enable AESS internal autogating
+ * @oh: struct omap_hwmod *
+ *
+ * The AESS will not IdleAck to the PRCM until its internal autogating
+ * is enabled.  Since internal autogating is disabled by default after
+ * AESS reset, we must enable autogating after the hwmod code resets
+ * the AESS.  Returns 0.
+ */
+int omap_hwmod_aess_preprogram(struct omap_hwmod *oh)
+{
+       void __iomem *va;
+
+       va = omap_hwmod_get_mpu_rt_va(oh);
+       if (!va)
+               return -EINVAL;
+
+       aess_enable_autogating(va);
+
+       return 0;
+}