arch/arm/mach-omap2/smartreflex-class3.c

   1 /*
   2  * Smart reflex Class 3 specific implementations
   3  *
   4  * Author: Thara Gopinath       <thara@ti.com>
   5  *
   6  * Copyright (C) 2010 Texas Instruments, Inc.
   7  * Thara Gopinath <thara@ti.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include "smartreflex.h"
  15
  16 static int sr_class3_enable(struct voltagedomain *voltdm)
  17 {
  18         unsigned long volt = omap_voltage_get_nom_volt(voltdm);
  19
  20         if (!volt) {
  21                 pr_warning("%s: Curr voltage unknown. Cannot enable sr_%s\n",
  22                                 __func__, voltdm->name);
  23                 return -ENODATA;
  24         }
  25
  26         omap_vp_enable(voltdm);
  27         return sr_enable(voltdm, volt);
  28 }
  29
  30 static int sr_class3_disable(struct voltagedomain *voltdm, int is_volt_reset)
  31 {
  32         omap_vp_disable(voltdm);
  33         sr_disable(voltdm);
  34         if (is_volt_reset)
  35                 omap_voltage_reset(voltdm);
  36
  37         return 0;
  38 }
  39
  40 static int sr_class3_configure(struct voltagedomain *voltdm)
  41 {
  42         return sr_configure_errgen(voltdm);
  43 }
  44
  45 /* SR class3 structure */
  46 static struct omap_sr_class_data class3_data = {
  47         .enable = sr_class3_enable,
  48         .disable = sr_class3_disable,
  49         .configure = sr_class3_configure,
  50         .class_type = SR_CLASS3,
  51 };
  52
  53 /* Smartreflex Class3 init API to be called from board file */
  54 static int __init sr_class3_init(void)
  55 {
  56         pr_info("SmartReflex Class3 initialized\n");
  57         return sr_register_class(&class3_data);
  58 }
  59 late_initcall(sr_class3_init);