This series contains the CPUfreq driver for Broadcom SoCs that use "AVS Firmware" for voltage and frequency scaling. All voltage and frequency transitions are performed by the firmware and are therefore hidden from Linux.
The driver provides a standard CPUfreq interface to other kernel components and to userland on the one hand and communicates with the AVS co-processor on the other. Communication between the two processors is via shared mailbox registers and interrupts (ARM -> AVS to tell the firmware that there is a command to process and AVS -> ARM to tell the driver that a command finished executing). lkml.org seems to be down for me. Here are patchwork links to the original series: https://patchwork.kernel.org/patch/9278119/ https://patchwork.kernel.org/patch/9278121/ https://patchwork.kernel.org/patch/9278127/ Changes from v1: - renamed binding document - rewrote the introduction of the binding document - created a new driver documentation file that contains Linux specific information that was previously part of the binding document - renamed the driver (and related config options) to include a reference to "STB", since this implementation is primarily intended for use on set-top boxes - improved comments - updated function __map_region() - updated struct private_data - added code to unmap memory regions in the error and exit paths - added new sysfs property to report frequency directly from the co-processor register Markus Mayer (3): dt: cpufreq: brcm: New binding document for brcmstb-avs-cpufreq cpufreq: brcmstb-avs-cpufreq: AVS CPUfreq driver for Broadcom STB SoCs cpufreq: brcmstb-avs-cpufreq: add debugfs support Documentation/cpu-freq/brcmstb-avs-cpufreq.txt | 27 + .../bindings/cpufreq/brcm,stb-avs-cpu-freq.txt | 77 ++ MAINTAINERS | 9 + drivers/cpufreq/Kconfig.arm | 10 + drivers/cpufreq/Makefile | 1 + drivers/cpufreq/brcmstb-avs-cpufreq.c | 1026 ++++++++++++++++++++ 6 files changed, 1150 insertions(+) create mode 100644 Documentation/cpu-freq/brcmstb-avs-cpufreq.txt create mode 100644 Documentation/devicetree/bindings/cpufreq/brcm,stb-avs-cpu-freq.txt create mode 100644 drivers/cpufreq/brcmstb-avs-cpufreq.c -- 2.7.4
