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| author | Peng Fan <van.freenix@gmail.com> | 2016-08-25 19:03:17 +0200 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2016-10-17 09:04:43 +0200 |
| commit | 436baaa2f58b06dded81388853d0ae1277af5bbe (patch) | |
| tree | 41fb88f7d8ec8284a58acc713f49372aff29280e /arch/arm/imx-common/timer.c | |
| parent | 6e1f4d2652e79c5afc3a2b1411ff261bc355bdcb (diff) | |
arm: imx-common: introduce back usec2ticks
This commit "2bb014820c49a63902103bac710bc86b5772e843"
do some clean up to use the code in lib/time.c.
But usec2ticks is still being used by security related job ring code.
Bring back the function to avoid build break when CONFIG_FSL_CAAM
is defined.
The computation logic has been changed, using 64-bit variable
to ease the process, making it work on older (MX5) platforms.
Signed-off-by: Peng Fan <van.freenix@gmail.com>
Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
Signed-off-by: Gary Bisson <gary.bisson@boundarydevices.com>
Diffstat (limited to 'arch/arm/imx-common/timer.c')
| -rw-r--r-- | arch/arm/imx-common/timer.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/arm/imx-common/timer.c b/arch/arm/imx-common/timer.c index fb1b693161..1f7c671ebe 100644 --- a/arch/arm/imx-common/timer.c +++ b/arch/arm/imx-common/timer.c @@ -120,3 +120,19 @@ ulong get_tbclk(void) { return gpt_get_clk(); } + +/* + * This function is intended for SHORT delays only. + * It will overflow at around 10 seconds @ 400MHz, + * or 20 seconds @ 200MHz. + */ +unsigned long usec2ticks(unsigned long _usec) +{ + unsigned long long usec = _usec; + + usec *= get_tbclk(); + usec += 999999; + do_div(usec, 1000000); + + return usec; +} |