sw/device/tests/clkmgr_off_smc_clk_test.c

// Copyright 2023 Google LLC.
// Copyright lowRISC contributors.
// Licensed under the Apache License, Version 2.0, see LICENSE for details.
// SPDX-License-Identifier: Apache-2.0

#include "hw/top_matcha/sw/autogen/top_matcha.h"
#include "sw/device/lib/base/abs_mmio.h"
#include "sw/device/lib/base/memory.h"
#include "sw/device/lib/dif/dif_aon_timer.h"
#include "sw/device/lib/dif/dif_base.h"
#include "sw/device/lib/dif/dif_clkmgr.h"
#include "sw/device/lib/runtime/log.h"
#include "sw/device/lib/testing/aon_timer_testutils.h"
#include "sw/device/lib/testing/test_framework/check.h"
#include "sw/device/lib/testing/test_framework/ottf_main.h"

OTTF_DEFINE_TEST_CONFIG();

static dif_aon_timer_t aon_timer;

/**
 * Turn off the clock for 400us, then turn on
 * Check the result in chip_sw_clkmgr_off_peri_vseq
 */
static void test_gateable_clocks_off_without_reset(
    const dif_clkmgr_t *clkmgr, dif_clkmgr_gateable_clock_t clock) {
  // Make sure the clock for the unit is on.
  CHECK_DIF_OK(
      dif_clkmgr_gateable_clock_set_enabled(clkmgr, clock, kDifToggleEnabled));

  LOG_INFO("Testing gateable clock ...");

  // Disable the peripheral's clock.
  CHECK_DIF_OK(
      dif_clkmgr_gateable_clock_set_enabled(clkmgr, clock, kDifToggleDisabled));
  // Wait for the clock to really turn off.
  busy_spin_micros(400);
  // Enalbe the clock
  CHECK_DIF_OK(
      dif_clkmgr_gateable_clock_set_enabled(clkmgr, clock, kDifToggleEnabled));
}

bool test_main(void) {
  dif_clkmgr_t clkmgr;

  CHECK_DIF_OK(dif_clkmgr_init(
      mmio_region_from_addr(TOP_MATCHA_CLKMGR_AON_BASE_ADDR), &clkmgr));

  // Initialize aon timer.
  CHECK_DIF_OK(dif_aon_timer_init(
      mmio_region_from_addr(TOP_MATCHA_AON_TIMER_AON_BASE_ADDR), &aon_timer));

  test_gateable_clocks_off_without_reset(&clkmgr,
                                         kTopMatchaGateableClocksSmcPeri);
  return true;
}