Add support for the ACONNECT bus which is part of the audio sub-system on Tegra210. I did look to see if we could use the simple-pm-bus infrastructure for this, however, in the end I found that it did was not a good fit because of the way clocks for the bus are handled. The simple-pm-bus is tightly coupled to the genpd subsystem and is reliant on the power-domain associated with the bus to have the flag GENPD_FLAG_PM_CLK set and uses the genpd function pointer, attach_dev(), as a hook to populate the clocks. For Tegra this does not work because the power-domains are instantiated from device-tree rather than platform code. In this case for Tegra it is simpler to keep the clock management of devices within the power-domain separated from the power-domain itself. Jon Hunter (3): dt-bindings: bus: Add documentation for Tegra210 ACONNECT bus: Add support for Tegra ACONNECT arm64: tegra: Add ACONNECT bus node for Tegra210 .../bindings/bus/nvidia,tegra210-aconnect.txt | 45 ++++++++ arch/arm64/boot/dts/nvidia/tegra210.dtsi | 12 +++ drivers/bus/Kconfig | 9 ++ drivers/bus/Makefile | 1 + drivers/bus/tegra-aconnect.c | 113 +++++++++++++++++++++ 5 files changed, 180 insertions(+) create mode 100644 Documentation/devicetree/bindings/bus/nvidia,tegra210-aconnect.txt create mode 100644 drivers/bus/tegra-aconnect.c -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
