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__ */