arch/arm/mach-omap2/cm4xxx.c

   1 /*
   2  * OMAP4 CM module functions
   3  *
   4  * Copyright (C) 2009 Nokia Corporation
   5  * Paul Walmsley
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/module.h>
  14 #include <linux/types.h>
  15 #include <linux/delay.h>
  16 #include <linux/spinlock.h>
  17 #include <linux/list.h>
  18 #include <linux/errno.h>
  19 #include <linux/err.h>
  20 #include <linux/io.h>
  21
  22 #include <asm/atomic.h>
  23
  24 #include "cm.h"
  25
  26 /* XXX move this to cm.h */
  27 /* MAX_MODULE_READY_TIME: max milliseconds for module to leave idle */
  28 #define MAX_MODULE_READY_TIME                   20000
  29
  30 /*
  31  * OMAP4_PRCM_CM_CLKCTRL_IDLEST_MASK: isolates the IDLEST field in the
  32  * CM_CLKCTRL register.
  33  */
  34 #define OMAP4_PRCM_CM_CLKCTRL_IDLEST_MASK       (0x2 << 16)
  35
  36 /*
  37  * OMAP4 prcm_mod u32 fields contain packed data: the CM ID in bit 16 and
  38  * the PRCM module offset address (from the CM module base) in bits 15-0.
  39  */
  40 #define OMAP4_PRCM_MOD_CM_ID_SHIFT              16
  41 #define OMAP4_PRCM_MOD_OFFS_MASK                0xffff
  42
  43 /**
  44  * omap4_cm_wait_idlest_ready - wait for a module to leave idle or standby
  45  * @prcm_mod: PRCM module offset (XXX example)
  46  * @prcm_dev_offs: PRCM device offset (e.g. MCASP XXX example)
  47  *
  48  * XXX document
  49  */
  50 int omap4_cm_wait_idlest_ready(u32 prcm_mod, u8 prcm_dev_offs)
  51 {
  52         /* FIXME: Add clock manager related code */
  53         return 0;
  54 }
  55