LXR linux/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 <linux/power/smartreflex.h>
  15#include "soc.h"
  16#include "voltage.h"
  17
  18static int sr_class3_enable(struct omap_sr *sr)
  19{
  20        unsigned long volt = voltdm_get_voltage(sr->voltdm);
  21
  22        if (!volt) {
  23                pr_warn("%s: Curr voltage unknown. Cannot enable %s\n",
  24                        __func__, sr->name);
  25                return -ENODATA;
  26        }
  27
  28        omap_vp_enable(sr->voltdm);
  29        return sr_enable(sr, volt);
  30}
  31
  32static int sr_class3_disable(struct omap_sr *sr, int is_volt_reset)
  33{
  34        sr_disable_errgen(sr);
  35        omap_vp_disable(sr->voltdm);
  36        sr_disable(sr);
  37        if (is_volt_reset)
  38                voltdm_reset(sr->voltdm);
  39
  40        return 0;
  41}
  42
  43static int sr_class3_configure(struct omap_sr *sr)
  44{
  45        return sr_configure_errgen(sr);
  46}
  47
  48/* SR class3 structure */
  49static struct omap_sr_class_data class3_data = {
  50        .enable = sr_class3_enable,
  51        .disable = sr_class3_disable,
  52        .configure = sr_class3_configure,
  53        .class_type = SR_CLASS3,
  54};
  55
  56/* Smartreflex Class3 init API to be called from board file */
  57static int __init sr_class3_init(void)
  58{
  59        pr_info("SmartReflex Class3 initialized\n");
  60        return sr_register_class(&class3_data);
  61}
  62omap_late_initcall(sr_class3_init);
  63