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
  18 static int sr_class3_enable(struct omap_sr *sr)
  19 {
  20         unsigned long volt = voltdm_get_voltage(sr->voltdm);
  21
  22         if (!volt) {
  23                 pr_warning("%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
  32 static 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
  43 static int sr_class3_configure(struct omap_sr *sr)
  44 {
  45         return sr_configure_errgen(sr);
  46 }
  47
  48 /* SR class3 structure */
  49 static 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 */
  57 static int __init sr_class3_init(void)
  58 {
  59         pr_info("SmartReflex Class3 initialized\n");
  60         return sr_register_class(&class3_data);
  61 }
  62 omap_late_initcall(sr_class3_init);