linux-kernel - RE: [RFC 0/4] clk: imx: Register the dram_apb and dram

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Date:   Tue, 17 Nov 2020 02:47:53 +0000
From:   Peng Fan <peng.fan@....com>
To:     Abel Vesa <abel.vesa@....com>, Shawn Guo <shawnguo@...nel.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Aisheng Dong <aisheng.dong@....com>,
        Anson Huang <anson.huang@....com>
CC:     dl-linux-imx <linux-imx@....com>,
        "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Abel Vesa <abel.vesa@....com>
Subject: RE: [RFC 0/4] clk: imx: Register the dram_apb and dram_alt as
 read-only 

> Subject: [RFC 0/4] clk: imx: Register the dram_apb and dram_alt as read-only

Any follow up about this patchset?

Regards,
Peng.

> 
> On i.MX8M platforms the dram_apb and dram_alt are controlled from EL3.
> So in order to keep track of the actual clock tree in kernel, we need to
> actually declare the clocks but never write to any of their registes.
> We do that by registering the clocks with only the ops that read but never
> write the registers.
> 
> Abel Vesa (4):
>   clk: Add CLK_GET_PARENT_NOCACHE flag
>   clk: Add clk_gate_ro_ops for read-only gate clocks
>   clk: imx: composite-8m: Add DRAM clock registration variant
>   clk: imx8m: Use dram variant registration for dram clocks
> 
>  drivers/clk/clk-gate.c             |  5 +++++
>  drivers/clk/clk.c                  | 31 +++++++++++++++++--------------
>  drivers/clk/imx/clk-composite-8m.c | 12 +++++++++++-
>  drivers/clk/imx/clk-imx8mm.c       |  4 ++--
>  drivers/clk/imx/clk-imx8mn.c       |  4 ++--
>  drivers/clk/imx/clk-imx8mp.c       |  4 ++--
>  drivers/clk/imx/clk-imx8mq.c       |  4 ++--
>  drivers/clk/imx/clk.h              |  7 +++++++
>  include/linux/clk-provider.h       |  2 ++
>  9 files changed, 50 insertions(+), 23 deletions(-)
> 
> --
> 2.7.4