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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 21 Oct 2020 20:36:51 +0300
From:   Abel Vesa <abel.vesa@....com>
To:     Shawn Guo <shawnguo@...nel.org>, Stephen Boyd <sboyd@...nel.org>,
        Peng Fan <peng.fan@....com>,
        Dong Aisheng <aisheng.dong@....com>,
        Anson Huang <anson.huang@....com>
Cc:     NXP Linux Team <linux-imx@....com>, linux-clk@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Abel Vesa <abel.vesa@....com>
Subject: [RFC 0/4] clk: imx: Register the dram_apb and dram_alt as read-only 

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