arch/arm/mach-omap2/powerdomain44xx.c

   1 /*
   2  * OMAP4 powerdomain control
   3  *
   4  * Copyright (C) 2009-2010 Texas Instruments, Inc.
   5  * Copyright (C) 2007-2009 Nokia Corporation
   6  *
   7  * Derived from mach-omap2/powerdomain.c written by Paul Walmsley
   8  * Rajendra Nayak <rnayak@ti.com>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  */
  14
  15 #include <linux/io.h>
  16 #include <linux/errno.h>
  17 #include <linux/delay.h>
  18 #include <plat/powerdomain.h>
  19 #include <plat/prcm.h>
  20 #include "prm.h"
  21 #include "prm-regbits-44xx.h"
  22 #include "powerdomains.h"
  23
  24 static int omap4_pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst)
  25 {
  26         prm_rmw_mod_reg_bits(OMAP_POWERSTATE_MASK,
  27                                 (pwrst << OMAP_POWERSTATE_SHIFT),
  28                                 pwrdm->prcm_offs, OMAP4_PM_PWSTCTRL);
  29         return 0;
  30 }
  31
  32 static int omap4_pwrdm_read_next_pwrst(struct powerdomain *pwrdm)
  33 {
  34         return prm_read_mod_bits_shift(pwrdm->prcm_offs,
  35                                 OMAP4_PM_PWSTCTRL, OMAP_POWERSTATE_MASK);
  36 }
  37
  38 static int omap4_pwrdm_read_pwrst(struct powerdomain *pwrdm)
  39 {
  40         return prm_read_mod_bits_shift(pwrdm->prcm_offs,
  41                                 OMAP4_PM_PWSTST, OMAP_POWERSTATEST_MASK);
  42 }
  43
  44 static int omap4_pwrdm_read_prev_pwrst(struct powerdomain *pwrdm)
  45 {
  46         return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP4_PM_PWSTST,
  47                                 OMAP4430_LASTPOWERSTATEENTERED_MASK);
  48 }
  49
  50 struct pwrdm_ops omap4_pwrdm_operations = {
  51         .pwrdm_set_next_pwrst   = omap4_pwrdm_set_next_pwrst,
  52         .pwrdm_read_next_pwrst  = omap4_pwrdm_read_next_pwrst,
  53         .pwrdm_read_pwrst       = omap4_pwrdm_read_pwrst,
  54         .pwrdm_read_prev_pwrst  = omap4_pwrdm_read_prev_pwrst,
  55 };