drivers/firmware/smccc/smccc.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2020 Arm Limited
   4  */
   5
   6 #define pr_fmt(fmt) "smccc: " fmt
   7
   8 #include <linux/init.h>
   9 #include <linux/arm-smccc.h>
  10
  11 static u32 smccc_version = ARM_SMCCC_VERSION_1_0;
  12 static enum arm_smccc_conduit smccc_conduit = SMCCC_CONDUIT_NONE;
  13
  14 void __init arm_smccc_version_init(u32 version, enum arm_smccc_conduit conduit)
  15 {
  16         smccc_version = version;
  17         smccc_conduit = conduit;
  18 }
  19
  20 enum arm_smccc_conduit arm_smccc_1_1_get_conduit(void)
  21 {
  22         if (smccc_version < ARM_SMCCC_VERSION_1_1)
  23                 return SMCCC_CONDUIT_NONE;
  24
  25         return smccc_conduit;
  26 }
  27 EXPORT_SYMBOL_GPL(arm_smccc_1_1_get_conduit);
  28
  29 u32 arm_smccc_get_version(void)
  30 {
  31         return smccc_version;
  32 }
  33 EXPORT_SYMBOL_GPL(arm_smccc_get_version);