Messages in this thread | | | Date | Mon, 6 Nov 2017 16:15:43 -0600 | From | Rob Herring <> | Subject | Re: [PATCH 2/3] clk: hisilicon: Add support for Hi3660 stub clocks |
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On Fri, Nov 03, 2017 at 03:25:06PM +0800, Kaihua Zhong wrote: > Hi3660 has four stub clocks, which are big and LITTLE cluster clocks, > GPU clock and DDR clock. These clocks ask MCU for frequency scaling > by sending message through mailbox. > > This commit adds support for stub clocks, it requests the dedicated > mailbox channel at initialization; then later uses this channel to send > message to MCU to execute frequency scaling. The four stub clocks share > the same mailbox channel, but every stub clock has its own command id so > MCU can distinguish the requirement coming for which clock. > > A shared memory is used to present effective frequency value, so the > clock driver uses I/O mapping for the memory and reads back rate value. > > Reviewed-by: Leo Yan <leo.yan@linaro.org> > Signed-off-by: Kai Zhao <zhaokai1@hisilicon.com> > Signed-off-by: Kevin Wang <kevin.wangtao@hisilicon.com> > Signed-off-by: Ruyi Wang <wangruyi@huawei.com> > Signed-off-by: Kaihua Zhong <zhongkaihua@huawei.com> > --- > drivers/clk/hisilicon/Kconfig | 6 + > drivers/clk/hisilicon/Makefile | 1 + > drivers/clk/hisilicon/clk-hi3660-stub.c | 195 +++++++++++++++++++++++++++++++
> include/dt-bindings/clock/hi3660-clock.h | 7 ++
This belongs in the binding doc patch. But no need to respin just for that.
> 4 files changed, 209 insertions(+) > create mode 100644 drivers/clk/hisilicon/clk-hi3660-stub.c
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