The Amlogic Meson GX SoCs embeds a clock measurer IP to measure the internal clocks frequencies. The precision is determined by stepping into the duration until the counter overflows. The debugfs shows a pretty summary and each clock can be measured individually aswell.
This patchset includes the dt-bindings, driver and the DT node added to the meson-gx dtsi. Changes since v2 at [2]: - Removed all reference to GX - Added compatibles for meson8/meson8b - Used Martin's suggestions on the divider naming - Added Martin's meson8/meson8b clk id table - Added Martin's fixes to support 32bit SoCs Changes since v1 at [1]: - fixed clock names - added summary in debugfs and moved indivudual clocks into a subdirectory - added the GX table to the match data [1] https://lkml.kernel.org/r/[email protected] [2] https://lkml.kernel.org/r/[email protected] Neil Armstrong (3): dt-bindings: amlogic: Add Internal Clock Measurer bindings soc: amlogic: Add Meson Clock Measure driver ARM64: dts: meson-gx: Add Internal Clock Measurer node .../bindings/soc/amlogic/clk-measure.txt | 18 + arch/arm64/boot/dts/amlogic/meson-gx.dtsi | 5 + drivers/soc/amlogic/Kconfig | 8 + drivers/soc/amlogic/Makefile | 1 + drivers/soc/amlogic/meson-clk-measure.c | 350 ++++++++++++++++++ 5 files changed, 382 insertions(+) create mode 100644 Documentation/devicetree/bindings/soc/amlogic/clk-measure.txt create mode 100644 drivers/soc/amlogic/meson-clk-measure.c -- 2.19.1
