lib/efi_selftest/efi_selftest_rtc.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * efi_selftest_rtc
   4  *
   5  * Copyright (c) 2018 Heinrich Schuchardt <xypron.glpk@gmx.de>
   6  *
   7  * Test the real time clock runtime services.
   8  */
   9
  10 #include <efi_selftest.h>
  11
  12 #define EFI_ST_NO_RTC "Could not read real time clock\n"
  13
  14 static struct efi_runtime_services *runtime;
  15
  16 /*
  17  * Setup unit test.
  18  *
  19  * @handle:     handle of the loaded image
  20  * @systable:   system table
  21  * @return:     EFI_ST_SUCCESS for success
  22  */
  23 static int setup(const efi_handle_t handle,
  24                  const struct efi_system_table *systable)
  25 {
  26         runtime = systable->runtime;
  27         return EFI_ST_SUCCESS;
  28 }
  29
  30 /*
  31  * Execute unit test.
  32  *
  33  * Display current time.
  34  *
  35  * @return:     EFI_ST_SUCCESS for success
  36  */
  37 static int execute(void)
  38 {
  39         efi_status_t ret;
  40         struct efi_time tm;
  41
  42         /* Display current time */
  43         ret = runtime->get_time(&tm, NULL);
  44         if (ret != EFI_SUCCESS) {
  45 #ifdef CONFIG_CMD_DATE
  46                 efi_st_error(EFI_ST_NO_RTC);
  47                 return EFI_ST_FAILURE;
  48 #else
  49                 efi_st_todo(EFI_ST_NO_RTC);
  50                 return EFI_ST_SUCCESS;
  51 #endif
  52         } else {
  53                 efi_st_printf("Time according to real time clock: "
  54                               "%.4u-%.2u-%.2u %.2u:%.2u:%.2u\n",
  55                               tm.year, tm.month, tm.day,
  56                               tm.hour, tm.minute, tm.second);
  57         }
  58
  59         return EFI_ST_SUCCESS;
  60 }
  61
  62 EFI_UNIT_TEST(rtc) = {
  63         .name = "real time clock",
  64         .phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
  65         .setup = setup,
  66         .execute = execute,
  67 };