linux-kernel - [PATCH 0/4] clk: imx: imx8m: fix a53 cpu clock

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Message-ID: <1578971599-4277-1-git-send-email-peng.fan@nxp.com>
Date:   Tue, 14 Jan 2020 03:17:44 +0000
From:   Peng Fan <peng.fan@....com>
To:     "sboyd@...nel.org" <sboyd@...nel.org>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        Abel Vesa <abel.vesa@....com>,
        Leonard Crestez <leonard.crestez@....com>
CC:     "kernel@...gutronix.de" <kernel@...gutronix.de>,
        dl-linux-imx <linux-imx@....com>,
        Aisheng Dong <aisheng.dong@....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@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Anson Huang <anson.huang@....com>,
        Jacky Bai <ping.bai@....com>,
        "l.stach@...gutronix.de" <l.stach@...gutronix.de>,
        Peng Fan <peng.fan@....com>
Subject: [PATCH 0/4] clk: imx: imx8m: fix a53 cpu clock

From: Peng Fan <peng.fan@....com>

The A53 CCM clk root only accepts input up to 1GHz, CCM A53 root
signoff timing is 1Ghz, however the A53 core which sources from CCM
root could run above 1GHz which voilates the CCM.

There is a CORE_SEL slice before A53 core, we need configure the
CORE_SEL slice source from ARM PLL, not A53 CCM clk root.

The A53 CCM clk root should only be used when need to change ARM PLL
frequency.

The i.MX7D A7 CCM should also be fixed, I'll write a patch later.

Peng Fan (4):
  clk: imx: imx8mq: fix a53 cpu clock
  clk: imx: imx8mm: fix a53 cpu clock
  clk: imx: imx8mn: fix a53 cpu clock
  clk: imx: imx8mp: fix a53 cpu clock

 drivers/clk/imx/clk-imx8mm.c             | 16 ++++++++++++----
 drivers/clk/imx/clk-imx8mn.c             | 16 ++++++++++++----
 drivers/clk/imx/clk-imx8mp.c             | 16 ++++++++++++----
 drivers/clk/imx/clk-imx8mq.c             | 16 ++++++++++++----
 include/dt-bindings/clock/imx8mm-clock.h |  4 +++-
 include/dt-bindings/clock/imx8mn-clock.h |  4 +++-
 include/dt-bindings/clock/imx8mp-clock.h |  3 ++-
 include/dt-bindings/clock/imx8mq-clock.h |  4 +++-
 8 files changed, 59 insertions(+), 20 deletions(-)

-- 
2.16.4