[V3,0/6] Add CPUidle support for Tegra210

Message

Joseph Lo Jan. 29, 2019, 9:28 a.m. UTC

This patch series adds CPUidle support for Tegra210, which supports
power-down state (C7) for CPU cores. And due to arch timer cannot work
across CPU core power-down and power on reset signal event. We introduce
Tegra210 timer driver to work as clock event device. So it can be the
wake-up source of CPU cores when they idled in the power-down state.

Fixed in V3:
 * use timer-of API for Tegra210 timer driver

Fixed in V2:
 * list all the timer IRQs in the binding doc and dts file
 * add error clean-up code in timer driver
 * add entry-latency-us and exit-latency-us properties for idle-states
   DT node

Joseph Lo (6):
  dt-bindings: timer: add Tegra210 timer
  clocksource: tegra: add Tegra210 timer driver
  arm64: dts: tegra210: fix timer node
  arm64: dts: tegra210: add CPU idle states properties
  arm64: dts: tegra210-p2180: Enable CPU idle support
  arm64: dts: tegra210-smaug: Enable CPU idle support

 .../bindings/timer/nvidia,tegra210-timer.txt  |  36 +++
 .../arm64/boot/dts/nvidia/tegra210-p2180.dtsi |   6 +
 arch/arm64/boot/dts/nvidia/tegra210-smaug.dts |   7 +
 arch/arm64/boot/dts/nvidia/tegra210.dtsi      |  33 ++-
 drivers/clocksource/Kconfig                   |   8 +
 drivers/clocksource/Makefile                  |   1 +
 drivers/clocksource/timer-tegra210.c          | 246 ++++++++++++++++++
 include/linux/cpuhotplug.h                    |   1 +
 8 files changed, 335 insertions(+), 3 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/timer/nvidia,tegra210-timer.txt
 create mode 100644 drivers/clocksource/timer-tegra210.c