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