include/sound/aess.h

   1 /*
   2  * AESS IP block reset
   3  *
   4  * Copyright (C) 2012 Texas Instruments, Inc.
   5  * Paul Walmsley
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation version 2.
  10  *
  11  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
  12  * kind, whether express or implied; without even the implied warranty
  13  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  19  * 02110-1301 USA
  20  */
  21 #ifndef __SOUND_AESS_H__
  22 #define __SOUND_AESS_H__
  23
  24 #include <linux/kernel.h>
  25 #include <linux/io.h>
  26
  27 /*
  28  * AESS_AUTO_GATING_ENABLE_OFFSET: offset in bytes of the AESS IP
  29  *     block's AESS_AUTO_GATING_ENABLE__1 register from the IP block's
  30  *     base address
  31  */
  32 #define AESS_AUTO_GATING_ENABLE_OFFSET                  0x07c
  33
  34 /* Register bitfields in the AESS_AUTO_GATING_ENABLE__1 register */
  35 #define AESS_AUTO_GATING_ENABLE_SHIFT                   0
  36
  37 /**
  38  * aess_enable_autogating - enable AESS internal autogating
  39  * @oh: struct omap_hwmod *
  40  *
  41  * Enable internal autogating on the AESS.  This allows the AESS to
  42  * indicate that it is idle to the OMAP PRCM.  Returns 0.
  43  */
  44 static inline void aess_enable_autogating(void __iomem *base)
  45 {
  46         u32 v;
  47
  48         /* Set AESS_AUTO_GATING_ENABLE__1.ENABLE to allow idle entry */
  49         v = 1 << AESS_AUTO_GATING_ENABLE_SHIFT;
  50         writel(v, base + AESS_AUTO_GATING_ENABLE_OFFSET);
  51 }
  52
  53 #endif /* __SOUND_AESS_H__ */