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Date: Wed, 13 Mar 2019 20:34:05 +0100 From: Alexandre Bailon <abailon@...libre.com> To: linux-pm@...r.kernel.org, georgi.djakov@...aro.org Cc: mturquette@...libre.com, ptitiano@...libre.com, linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, zening.wang@....com, aisheng.dong@....com, khilman@...libre.com, ccaione@...libre.com, Alexandre Bailon <abailon@...libre.com> Subject: [RFC PATCH 0/3] Add support of busfreq This series implements busfreq, a framework used in MXP's tree to scale the interconnect and dram frequencies. In the vendor tree, device's driver request for a performance level, which is used to scale the frequencies. This series implements it using the interconnect framework. Devices' driver request for bandwidth which is use by busfreq to determine a performance level, and then scale the frequency. Busfreq is quite generic. It could be used for any i.MX SoC. A busfreq platform driver just have to define a list of interconnect nodes, and some OPPs. This series is sent as RFC mostly because the current support of i.MX SoC won't benefit of busfreq framework, because the clocks' driver don't support interconnect / dram frequency scaling. As exemple, this series implements busfreq for i.MX8MM whose upstreaming is in progress. Because this relies on ATF to do the frequency scaling, it won't be hard make it work. As exemple, this series implements busfreq for Alexandre Bailon (3): drivers: interconnect: Add a driver for i.MX SoC drivers: interconnect: imx: Add support of i.MX8MM dt-bindings: interconnect: Document fsl,busfreq-imx8mm bindings .../bindings/interconnect/imx8mm.txt | 24 + drivers/interconnect/Kconfig | 1 + drivers/interconnect/Makefile | 1 + drivers/interconnect/imx/Kconfig | 17 + drivers/interconnect/imx/Makefile | 2 + drivers/interconnect/imx/busfreq-imx8mm.c | 132 ++++ drivers/interconnect/imx/busfreq.c | 570 ++++++++++++++++++ drivers/interconnect/imx/busfreq.h | 123 ++++ include/dt-bindings/interconnect/imx8mm.h | 37 ++ 9 files changed, 907 insertions(+) create mode 100644 Documentation/devicetree/bindings/interconnect/imx8mm.txt create mode 100644 drivers/interconnect/imx/Kconfig create mode 100644 drivers/interconnect/imx/Makefile create mode 100644 drivers/interconnect/imx/busfreq-imx8mm.c create mode 100644 drivers/interconnect/imx/busfreq.c create mode 100644 drivers/interconnect/imx/busfreq.h create mode 100644 include/dt-bindings/interconnect/imx8mm.h -- 2.19.2
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