Hi Rob, On 16/07/2018 23:45, Rob Herring wrote: > On Tue, Jul 03, 2018 at 03:21:49PM +0200, Neil Armstrong wrote: >> The Amlogic Meson GX SoCs embeds a clock measurer IP to measure the internal >> clock paths frequencies. >> >> Signed-off-by: Neil Armstrong <[email protected]> >> --- >> .../devicetree/bindings/soc/amlogic/clk-measure.txt | 15 >> +++++++++++++++ >> 1 file changed, 15 insertions(+) >> create mode 100644 >> Documentation/devicetree/bindings/soc/amlogic/clk-measure.txt >> >> diff --git a/Documentation/devicetree/bindings/soc/amlogic/clk-measure.txt >> b/Documentation/devicetree/bindings/soc/amlogic/clk-measure.txt >> new file mode 100644 >> index 0000000..ba9183a >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/soc/amlogic/clk-measure.txt >> @@ -0,0 +1,15 @@ >> +Amlogic Internal Clock Measurer >> +=============================== >> + >> +The Amlogic SoCs contains an IP to measure the internal clocks. >> +The precision is multiple of MHz, useful to debug the clock states. > > What a simple yet useful debug tool. > >> + >> +Required properties: >> +- compatible: Shall contain "amlogic,meson-gx-clk-measure" >> +- reg: base address and size of the Clock Measurer register space. >> + >> +Example: >> + clock-measure@8758 { >> + compatible = "amlogic,meson-gx-clk-measure"; >> + reg = <0x0 0x8758 0x0 0x10>; > > This doesn't really look like its own block though. Can't the parent > device instantiate the driver for this?
As weird as it seems, on the GX family the registers are not on a aligned boundary, but yes it's its own block. On newer SoCs, they have a more aligned register address, with the exact same register set. Neil > > >> + }; >> -- >> 2.7.4 >> >> >> _______________________________________________ >> linux-arm-kernel mailing list >> [email protected] >> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
