The Amlogic Meson GX SoCs embeds a clock measurer IP to measure the internal clocks frequencyies. The precision is determined by stepping into the divider until the counter overflows. The debugfs slows a pretty summary and each clock can be measured individually aswell.
Thsi patchset includes the dt-bindings, driver and the DT node added to the meson-gx dtsi. 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 Neil Armstrong (3): dt-bindings: amlogic: Add Internal Clock Measurer bindings soc: amlogic: Add Meson GX Clock Measure driver ARM64: dts: meson-gx: Add Internal Clock Measurer node .../bindings/soc/amlogic/clk-measure.txt | 15 + arch/arm64/boot/dts/amlogic/meson-gx.dtsi | 5 + drivers/soc/amlogic/Kconfig | 8 + drivers/soc/amlogic/Makefile | 1 + drivers/soc/amlogic/meson-gx-clk-measure.c | 293 ++++++++++++++++++ 5 files changed, 322 insertions(+) create mode 100644 Documentation/devicetree/bindings/soc/amlogic/clk-measure.txt create mode 100644 drivers/soc/amlogic/meson-gx-clk-measure.c -- 2.19.1
