arch/arm/mach-omap2/clockdomain33xx.c

   1 /*
   2  * AM33XX clockdomain control
   3  *
   4  * Copyright (C) 2011-2012 Texas Instruments Incorporated - http://www.ti.com/
   5  * Vaibhav Hiremath <hvaibhav@ti.com>
   6  *
   7  * Derived from mach-omap2/clockdomain44xx.c written by Rajendra Nayak
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation version 2.
  12  *
  13  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
  14  * kind, whether express or implied; without even the implied warranty
  15  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  */
  18
  19 #include <linux/kernel.h>
  20
  21 #include "clockdomain.h"
  22 #include "cm33xx.h"
  23
  24
  25 static int am33xx_clkdm_sleep(struct clockdomain *clkdm)
  26 {
  27         am33xx_cm_clkdm_force_sleep(clkdm->cm_inst, clkdm->clkdm_offs);
  28         return 0;
  29 }
  30
  31 static int am33xx_clkdm_wakeup(struct clockdomain *clkdm)
  32 {
  33         am33xx_cm_clkdm_force_wakeup(clkdm->cm_inst, clkdm->clkdm_offs);
  34         return 0;
  35 }
  36
  37 static void am33xx_clkdm_allow_idle(struct clockdomain *clkdm)
  38 {
  39         am33xx_cm_clkdm_enable_hwsup(clkdm->cm_inst, clkdm->clkdm_offs);
  40 }
  41
  42 static void am33xx_clkdm_deny_idle(struct clockdomain *clkdm)
  43 {
  44         am33xx_cm_clkdm_disable_hwsup(clkdm->cm_inst, clkdm->clkdm_offs);
  45 }
  46
  47 static int am33xx_clkdm_clk_enable(struct clockdomain *clkdm)
  48 {
  49         if (clkdm->flags & CLKDM_CAN_FORCE_WAKEUP)
  50                 return am33xx_clkdm_wakeup(clkdm);
  51
  52         return 0;
  53 }
  54
  55 static int am33xx_clkdm_clk_disable(struct clockdomain *clkdm)
  56 {
  57         bool hwsup = false;
  58
  59         hwsup = am33xx_cm_is_clkdm_in_hwsup(clkdm->cm_inst, clkdm->clkdm_offs);
  60
  61         if (!hwsup && (clkdm->flags & CLKDM_CAN_FORCE_SLEEP))
  62                 am33xx_clkdm_sleep(clkdm);
  63
  64         return 0;
  65 }
  66
  67 struct clkdm_ops am33xx_clkdm_operations = {
  68         .clkdm_sleep            = am33xx_clkdm_sleep,
  69         .clkdm_wakeup           = am33xx_clkdm_wakeup,
  70         .clkdm_allow_idle       = am33xx_clkdm_allow_idle,
  71         .clkdm_deny_idle        = am33xx_clkdm_deny_idle,
  72         .clkdm_clk_enable       = am33xx_clkdm_clk_enable,
  73         .clkdm_clk_disable      = am33xx_clkdm_clk_disable,
  74 };