diff options
| author | Alistair Delva <adelva@google.com> | 2021-02-16 21:01:22 +0000 |
|---|---|---|
| committer | Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com> | 2021-02-16 21:01:22 +0000 |
| commit | efb2826bb8160e2d8e0fcec85133a7468484f9fd (patch) | |
| tree | 37a21c69306801ee7cdda5167a30896c8740155b /drivers/renesas/common/delay/micro_delay.c | |
| parent | b00a71fc312c9781fa6f404dccfb55b062b2ccac (diff) | |
| parent | faa476c0caaa598afa5a6109d17102db5fe35ec6 (diff) | |
| download | platform_external_arm-trusted-firmware-master.tar.gz platform_external_arm-trusted-firmware-master.tar.bz2 platform_external_arm-trusted-firmware-master.zip | |
Merge branch 'aosp/upstream-master' into HEAD am: faa476c0caHEADandroid-s-beta-5android-s-beta-4android-s-beta-3android-s-beta-2android-s-beta-1mastermain-cg-testing-releaseandroid-s-beta-5android-s-beta-4
Original change: https://android-review.googlesource.com/c/platform/external/arm-trusted-firmware/+/1589611
MUST ONLY BE SUBMITTED BY AUTOMERGER
Change-Id: I3a25534ceed4f8e188510641080d8b8ed49b8f62
Diffstat (limited to 'drivers/renesas/common/delay/micro_delay.c')
| -rw-r--r-- | drivers/renesas/common/delay/micro_delay.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/renesas/common/delay/micro_delay.c b/drivers/renesas/common/delay/micro_delay.c new file mode 100644 index 000000000..a5e2a6928 --- /dev/null +++ b/drivers/renesas/common/delay/micro_delay.c @@ -0,0 +1,31 @@ +/* + * Copyright (c) 2018-2020, Renesas Electronics Corporation. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <arch.h> +#include <arch_helpers.h> + +#include "micro_delay.h" + +#define RCAR_CONV_MICROSEC 1000000U + +void +#if IMAGE_BL31 + __attribute__ ((section(".system_ram"))) +#endif + rcar_micro_delay(uint64_t micro_sec) +{ + uint64_t freq; + uint64_t base_count; + uint64_t get_count; + uint64_t wait_time = 0U; + + freq = read_cntfrq_el0(); + base_count = read_cntpct_el0(); + while (micro_sec > wait_time) { + get_count = read_cntpct_el0(); + wait_time = ((get_count - base_count) * RCAR_CONV_MICROSEC) / freq; + } +} |