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timer: Add High Precision Event Timers (HPET) support

Ivan Gorinov u-boot 13 versions – New

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Versions newest first · linked by author and title

  1. v6 Latest posting 2/22 patches 0 repliesNew
  2. v6 posting 1/21 patch 0 repliesSuperseded
  3. v52 patches 0 repliesSuperseded
Earlier versions · 10
VersionPostedPatchesRepliesStatus
v4 posting 2/21 patch0 repliesSuperseded
v4 posting 1/21 patch0 repliesSuperseded
v2 posting 5/51 patch0 repliesSuperseded
v2 posting 4/51 patch0 repliesSuperseded
v2 posting 3/51 patch0 repliesSuperseded
v3 posting 2/21 patch0 repliesSuperseded
v3 posting 1/21 patch0 repliesSuperseded
v2 posting 2/51 patch0 repliesSuperseded
v2 posting 1/51 patch0 repliesSuperseded
v11 patch0 repliesSuperseded

Changes in v6 from the cover letter

Added TSC-specific timer functions to use instead of early timer in the code that specifically needs TSC.

Patches in v6 posting 2/2 No applies recorded yet

#Subject and filesSizeRepliesApplied
1/2x86: Add TSC-specific timer functionsarch/x86/cpu/coreboot/timestamp.c arch/x86/cpu/quark/mrc_util.c arch/x86/include/asm/u-boot-x86.h +1 more+32 -183 replies
1/2x86: Add TSC-specific timer functions+0 -01 reply
1/2x86: Add TSC-specific timer functions+0 -03 replies
2/2timer: Add High Precision Event Timers (HPET) supportarch/Kconfig arch/x86/Kconfig arch/x86/dts/hpet.dtsi +5 more+257 -00 replies

Reviews trailers per patch

No Reviewed-by, Acked-by or Tested-by trailers for v6 yet.

Read the v6 thread

Cover letter [U-Boot] [PATCH v6 0/2] timer: Add High Precision Event Timers (HPET) support

Add HPET driver as an alternative timer for x86 (default is TSC). HPET counter has constant frequency and does not need calibration. This change also makes TSC timer driver optional on x86. New HPET driver can also be selected as the early timer on x86.

v6:
Added TSC-specific timer functions to use instead of early timer in the code that specifically needs TSC.

v5:
Using readq() and writeq() for main counter access.

v3:
Added early timer choice in x86 Kconfig.

Ivan Gorinov (2):
x86: Add TSC-specific timer functions
timer: Add High Precision Event Timers (HPET) support

 arch/Kconfig                      |   1 +
 arch/x86/Kconfig                  |  21 ++++
 arch/x86/cpu/coreboot/timestamp.c |   2 +-
 arch/x86/cpu/quark/mrc_util.c     |  13 ++-
 arch/x86/dts/hpet.dtsi            |   7 ++
 arch/x86/include/asm/u-boot-x86.h |   2 +-
 common/Kconfig                    |   1 +
 drivers/timer/Kconfig             |   9 ++
 drivers/timer/Makefile            |   1 +
 drivers/timer/hpet_timer.c        | 209 ++++++++++++++++++++++++++++++++++++++
 drivers/timer/tsc_timer.c         |  39 +++++--
 11 files changed, 288 insertions(+), 17 deletions(-)
 create mode 100644 arch/x86/dts/hpet.dtsi
 create mode 100644 drivers/timer/hpet_timer.c
Signature · 1 line
2.7.4

Read the cover letter in its thread