arch/arm/mach-omap2/omap_hwmod_reset.c

   1 /*
   2  * OMAP IP block custom reset and preprogramming stubs
   3  *
   4  * Copyright (C) 2012 Texas Instruments, Inc.
   5  * Paul Walmsley
   6  *
   7  * A small number of IP blocks need custom reset and preprogramming
   8  * functions.  The stubs in this file provide a standard way for the
   9  * hwmod code to call these functions, which are to be located under
  10  * drivers/.
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License as
  14  * published by the Free Software Foundation version 2.
  15  *
  16  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
  17  * kind, whether express or implied; without even the implied warranty
  18  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  24  * 02110-1301 USA
  25  */
  26 #include <linux/kernel.h>
  27 #include <linux/errno.h>
  28
  29 #include <sound/aess.h>
  30
  31 #include "omap_hwmod.h"
  32
  33 /**
  34  * omap_hwmod_aess_preprogram - enable AESS internal autogating
  35  * @oh: struct omap_hwmod *
  36  *
  37  * The AESS will not IdleAck to the PRCM until its internal autogating
  38  * is enabled.  Since internal autogating is disabled by default after
  39  * AESS reset, we must enable autogating after the hwmod code resets
  40  * the AESS.  Returns 0.
  41  */
  42 int omap_hwmod_aess_preprogram(struct omap_hwmod *oh)
  43 {
  44         void __iomem *va;
  45
  46         va = omap_hwmod_get_mpu_rt_va(oh);
  47         if (!va)
  48                 return -EINVAL;
  49
  50         aess_enable_autogating(va);
  51
  52         return 0;
  53 }