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From: Peng Fan <peng.fan@nxp.com>
To: "sboyd@kernel.org" <sboyd@kernel.org>,
	"shawnguo@kernel.org" <shawnguo@kernel.org>,
	"s.hauer@pengutronix.de" <s.hauer@pengutronix.de>,
	"festevam@gmail.com" <festevam@gmail.com>,
	Abel Vesa <abel.vesa@nxp.com>,
	Leonard Crestez <leonard.crestez@nxp.com>
Cc: "kernel@pengutronix.de" <kernel@pengutronix.de>,
	dl-linux-imx <linux-imx@nxp.com>,
	Aisheng Dong <aisheng.dong@nxp.com>,
	"linux-clk@vger.kernel.org" <linux-clk@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Anson Huang <anson.huang@nxp.com>, Jacky Bai <ping.bai@nxp.com>,
	"l.stach@pengutronix.de" <l.stach@pengutronix.de>,
	Peng Fan <peng.fan@nxp.com>
Subject: [PATCH V2 0/4] clk: imx: imx8m: fix a53 cpu clock
Date: Tue, 14 Jan 2020 07:27:10 +0000
Message-ID: <1578986576-6168-1-git-send-email-peng.fan@nxp.com> (raw)

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

V2:
 Fix i.MX8MP build
 Update cover letter, i.MX7D not have this issue 

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.

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


             reply index

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-14  7:27 Peng Fan [this message]
2020-01-14  7:27 ` [PATCH V2 1/4] clk: imx: imx8mq: " Peng Fan
2020-02-12 13:43   ` Shawn Guo
2020-02-12 13:47     ` Peng Fan
2020-01-14  7:27 ` [PATCH V2 2/4] clk: imx: imx8mm: " Peng Fan
2020-01-14  7:27 ` [PATCH V2 3/4] clk: imx: imx8mn: " Peng Fan
2020-01-14  7:27 ` [PATCH V2 4/4] clk: imx: imx8mp: " Peng Fan

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