From: Dong Aisheng <aisheng.dong@nxp.com>
To: linux-arm-kernel@lists.infradead.org
Cc: Dong Aisheng <aisheng.dong@nxp.com>,
Mark Rutland <mark.rutland@arm.com>,
dongas86@gmail.com, devicetree@vger.kernel.org,
Rob Herring <robh+dt@kernel.org>,
linux-imx@nxp.com, kernel@pengutronix.de, fabio.estevam@nxp.com,
shawnguo@kernel.org
Subject: [PATCH 3/4] dt-bindings: arm: fsl: add scu binding doc
Date: Sat, 28 Apr 2018 02:46:15 +0800 [thread overview]
Message-ID: <1524854776-14863-4-git-send-email-aisheng.dong@nxp.com> (raw)
In-Reply-To: <1524854776-14863-1-git-send-email-aisheng.dong@nxp.com>
The System Controller Firmware (SCFW) is a low-level system function
which runs on a dedicated Cortex-M core to provide power, clock, and
resource management. It exists on some i.MX8 processors. e.g. i.MX8QM
(QM, QP), and i.MX8QX (QXP, DX).
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: devicetree@vger.kernel.org
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
---
.../devicetree/bindings/arm/freescale/fsl,scu.txt | 40 ++++++++++++++++++++++
1 file changed, 40 insertions(+)
create mode 100644 Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
diff --git a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
new file mode 100644
index 0000000..3b51d82
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
@@ -0,0 +1,40 @@
+NXP i.MX System Controller Firmware (SCFW)
+--------------------------------------------------------------------
+
+The System Controller Firmware (SCFW) is a low-level system function
+which runs on a dedicated Cortex-M core to provide power, clock, and
+resource management. It exists on some i.MX8 processors. e.g. i.MX8QM
+(QM, QP), and i.MX8QX (QXP, DX).
+
+The AP communicates with the SC using a multi-ported MU module found
+in the LSIO subsystem. The current definition of this MU module provides
+5 remote AP connections to the SC to support up to 5 execution environments
+(TZ, HV, standard Linux, etc.). The SC side of this MU module interfaces
+with the LSIO DSC IP bus. The SC firmware will communicate with this MU
+using the MSI bus.
+
+System Controller Device Node:
+=============================
+
+Required properties:
+-------------------
+- compatible: should be "fsl,imx8qxp-scu" or "fsl,imx8qm-scu"
+- fsl,mu: a phandle to the Message Unit used by SCU. Should be
+ one of LSIO MU0~M4 for imx8qxp and imx8qm. Users need
+ to make sure not use the one which is conflict with
+ other execution environments. e.g. ATF.
+
+Examples:
+--------
+lsio_mu0: mu@5d1b0000 {
+ compatible = "fsl,imx8qxp-mu", "fsl,imx6sx-mu";
+ reg = <0x0 0x5d1b0000 0x0 0x10000>;
+ interrupts = <GIC_SPI 176 IRQ_TYPE_LEVEL_HIGH>;
+ status = "okay";
+};
+
+scu {
+ compatible = "fsl,imx8qxp-scu";
+ fsl,mu = <&lsio_mu0>;
+ status = "okay";
+};
--
2.7.4
next prev parent reply other threads:[~2018-04-27 18:46 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1524854776-14863-1-git-send-email-aisheng.dong@nxp.com>
2018-04-27 18:46 ` [PATCH 2/4] dt-bindings: arm: fsl: add mu binding doc Dong Aisheng
2018-05-01 15:25 ` Rob Herring
2018-05-02 17:29 ` A.s. Dong
2018-04-27 18:46 ` Dong Aisheng [this message]
2018-05-01 15:29 ` [PATCH 3/4] dt-bindings: arm: fsl: add scu " Rob Herring
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1524854776-14863-4-git-send-email-aisheng.dong@nxp.com \
--to=aisheng.dong@nxp.com \
--cc=devicetree@vger.kernel.org \
--cc=dongas86@gmail.com \
--cc=fabio.estevam@nxp.com \
--cc=kernel@pengutronix.de \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-imx@nxp.com \
--cc=mark.rutland@arm.com \
--cc=robh+dt@kernel.org \
--cc=shawnguo@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).