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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Smart reflex Class 3 specific implementations
   4  *
   5  * Author: Thara Gopinath       <thara@ti.com>
   6  *
   7  * Copyright (C) 2010 Texas Instruments, Inc.
   8  * Thara Gopinath <thara@ti.com>
   9  */
  10
  11 #include <linux/power/smartreflex.h>
  12 #include "soc.h"
  13 #include "voltage.h"
  14
  15 static int sr_class3_enable(struct omap_sr *sr)
  16 {
  17         unsigned long volt = voltdm_get_voltage(sr->voltdm);
  18
  19         if (!volt) {
  20                 pr_warn("%s: Curr voltage unknown. Cannot enable %s\n",
  21                         __func__, sr->name);
  22                 return -ENODATA;
  23         }
  24
  25         omap_vp_enable(sr->voltdm);
  26         return sr_enable(sr, volt);
  27 }
  28
  29 static int sr_class3_disable(struct omap_sr *sr, int is_volt_reset)
  30 {
  31         sr_disable_errgen(sr);
  32         omap_vp_disable(sr->voltdm);
  33         sr_disable(sr);
  34         if (is_volt_reset)
  35                 voltdm_reset(sr->voltdm);
  36
  37         return 0;
  38 }
  39
  40 static int sr_class3_configure(struct omap_sr *sr)
  41 {
  42         return sr_configure_errgen(sr);
  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 omap_late_initcall(sr_class3_init);