RE: [RFC PATCH 0/3] Add support of busfreq
- Date: Fri, 15 Mar 2019 02:39:48 +0000
- From: Aisheng Dong <aisheng.dong@xxxxxxx>
- Subject: RE: [RFC PATCH 0/3] Add support of busfreq
+Jacky and Leonard, Ranjani
> From: Alexandre Bailon [mailto:abailon@xxxxxxxxxxxx]
> 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.
It's really great to see this patch series.
And it should be the correct direction we're heading to upstream busfreq support.
> 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.
How can I test this patch series?
Any additional patches you can share with us?
Or what else we need to do to test it? We can help with it.
> 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
> create mode 100644 drivers/interconnect/imx/Kconfig create mode
> 100644 drivers/interconnect/imx/Makefile create mode 100644
> 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