From: Anson Huang <Anson.Huang@nxp•com>
To: robh+dt@kernel•org, mark.rutland@arm•com, shawnguo@kernel•org,
s.hauer@pengutronix•de, kernel@pengutronix•de,
festevam@gmail•com, daniel.lezcano@linaro•org,
tglx@linutronix•de, leonard.crestez@nxp•com,
daniel.baluta@nxp•com, ping.bai@nxp•com, jun.li@nxp•com,
l.stach@pengutronix•de, abel.vesa@nxp•com, ccaione@baylibre•com,
andrew.smirnov@gmail•com, angus@akkea•ca, agx@sigxcpu•org,
devicetree@vger•kernel.org, linux-arm-kernel@lists•infradead.org,
linux-kernel@vger•kernel.org
Cc: Linux-imx@nxp•com
Subject: [PATCH V6 4/4] arm64: dts: imx8mm: Enable cpu-idle driver
Date: Thu, 15 Aug 2019 20:38:45 -0400 [thread overview]
Message-ID: <1565915925-21009-4-git-send-email-Anson.Huang@nxp.com> (raw)
In-Reply-To: <1565915925-21009-1-git-send-email-Anson.Huang@nxp.com>
Enable i.MX8MM cpu-idle using generic ARM cpu-idle driver, 2 states
are supported, details as below:
root@imx8mmevk:~# cat /sys/devices/system/cpu/cpu0/cpuidle/state0/name
WFI
root@imx8mmevk:~# cat /sys/devices/system/cpu/cpu0/cpuidle/state0/usage
3973
root@imx8mmevk:~# cat /sys/devices/system/cpu/cpu0/cpuidle/state1/name
cpu-pd-wait
root@imx8mmevk:~# cat /sys/devices/system/cpu/cpu0/cpuidle/state1/usage
6647
Signed-off-by: Anson Huang <Anson.Huang@nxp•com>
---
Changes since V5:
- improve state1 idle name to better match PSCI doc;
- remove wakeup-latency-us property as it is NOT necessary when entry-latency-us/exit-latency-us
exist.
---
arch/arm64/boot/dts/freescale/imx8mm.dtsi | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/arch/arm64/boot/dts/freescale/imx8mm.dtsi b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
index 94433c53..9b2dc12 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
@@ -44,6 +44,19 @@
#address-cells = <1>;
#size-cells = <0>;
+ idle-states {
+ entry-method = "psci";
+
+ cpu_pd_wait: cpu-pd-wait {
+ compatible = "arm,idle-state";
+ arm,psci-suspend-param = <0x0010033>;
+ local-timer-stop;
+ entry-latency-us = <1000>;
+ exit-latency-us = <700>;
+ min-residency-us = <2700>;
+ };
+ };
+
A53_0: cpu@0 {
device_type = "cpu";
compatible = "arm,cortex-a53";
@@ -56,6 +69,7 @@
nvmem-cells = <&cpu_speed_grade>;
nvmem-cell-names = "speed_grade";
#cooling-cells = <2>;
+ cpu-idle-states = <&cpu_pd_wait>;
};
A53_1: cpu@1 {
@@ -68,6 +82,7 @@
next-level-cache = <&A53_L2>;
operating-points-v2 = <&a53_opp_table>;
#cooling-cells = <2>;
+ cpu-idle-states = <&cpu_pd_wait>;
};
A53_2: cpu@2 {
@@ -80,6 +95,7 @@
next-level-cache = <&A53_L2>;
operating-points-v2 = <&a53_opp_table>;
#cooling-cells = <2>;
+ cpu-idle-states = <&cpu_pd_wait>;
};
A53_3: cpu@3 {
@@ -92,6 +108,7 @@
next-level-cache = <&A53_L2>;
operating-points-v2 = <&a53_opp_table>;
#cooling-cells = <2>;
+ cpu-idle-states = <&cpu_pd_wait>;
};
A53_L2: l2-cache0 {
--
2.7.4
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists•infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2019-08-16 0:58 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-16 0:38 [PATCH V6 1/4] clocksource: imx-sysctr: Add internal clock divider handle Anson Huang
2019-08-16 0:38 ` [PATCH V6 2/4] arm64: dts: imx8mm: Add system counter node Anson Huang
2019-08-16 0:38 ` [PATCH V6 3/4] arm64: dts: imx8mq: " Anson Huang
2019-08-16 0:38 ` Anson Huang [this message]
2019-08-16 9:59 ` [PATCH V6 4/4] arm64: dts: imx8mm: Enable cpu-idle driver Daniel Lezcano
2019-08-16 10:08 ` Anson Huang
2019-08-16 10:37 ` Anson Huang
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=1565915925-21009-4-git-send-email-Anson.Huang@nxp.com \
--to=anson.huang@nxp$(echo .)com \
--cc=Linux-imx@nxp$(echo .)com \
--cc=abel.vesa@nxp$(echo .)com \
--cc=agx@sigxcpu$(echo .)org \
--cc=andrew.smirnov@gmail$(echo .)com \
--cc=angus@akkea$(echo .)ca \
--cc=ccaione@baylibre$(echo .)com \
--cc=daniel.baluta@nxp$(echo .)com \
--cc=daniel.lezcano@linaro$(echo .)org \
--cc=devicetree@vger$(echo .)kernel.org \
--cc=festevam@gmail$(echo .)com \
--cc=jun.li@nxp$(echo .)com \
--cc=kernel@pengutronix$(echo .)de \
--cc=l.stach@pengutronix$(echo .)de \
--cc=leonard.crestez@nxp$(echo .)com \
--cc=linux-arm-kernel@lists$(echo .)infradead.org \
--cc=linux-kernel@vger$(echo .)kernel.org \
--cc=mark.rutland@arm$(echo .)com \
--cc=ping.bai@nxp$(echo .)com \
--cc=robh+dt@kernel$(echo .)org \
--cc=s.hauer@pengutronix$(echo .)de \
--cc=shawnguo@kernel$(echo .)org \
--cc=tglx@linutronix$(echo .)de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
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