All of lore.kernel.org
 help / color / mirror / Atom feed
From: Alim Akhtar <alim.akhtar@samsung.com>
To: rzk@kernel.org
Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org,
	robh+dt@kernel.org, Alim Akhtar <alim.akhtar@samsung.com>
Subject: [PATCH 1/2] arm64: dts: exynos: Fix silent hang after boot
Date: Sun,  5 Jul 2020 12:27:46 +0530	[thread overview]
Message-ID: <20200705065747.63014-1-alim.akhtar@samsung.com> (raw)
In-Reply-To: CGME20200705071805epcas5p37045f009655c40d573077babf17c51fa@epcas5p3.samsung.com

Once regulators are disabled after kernel boot, on espresso
board silent hang observed because of LDO7 being disabled.
LDO7 actually provide power to CPU cores and non-cpu blocks
circuitries.
Keep this regulator always-on to fix this hang.

Fixes: 9589f7721e16 ("arm64: dts: Add S2MPS15 PMIC node on exynos7-espresso")
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
---
 arch/arm64/boot/dts/exynos/exynos7-espresso.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/exynos/exynos7-espresso.dts b/arch/arm64/boot/dts/exynos/exynos7-espresso.dts
index 790f12ca8981..bb86950032d3 100644
--- a/arch/arm64/boot/dts/exynos/exynos7-espresso.dts
+++ b/arch/arm64/boot/dts/exynos/exynos7-espresso.dts
@@ -157,6 +157,7 @@
 				regulator-min-microvolt = <700000>;
 				regulator-max-microvolt = <1150000>;
 				regulator-enable-ramp-delay = <125>;
+				regulator-always-on;
 			};
 
 			ldo8_reg: LDO8 {

base-commit: 9e50b94b3eb0d859a2586b5a40d7fd6e5afd9210
-- 
2.17.1


WARNING: multiple messages have this Message-ID (diff)
From: Alim Akhtar <alim.akhtar@samsung.com>
To: rzk@kernel.org
Cc: devicetree@vger.kernel.org, linux-samsung-soc@vger.kernel.org,
	linux-kernel@vger.kernel.org, robh+dt@kernel.org,
	Alim Akhtar <alim.akhtar@samsung.com>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/2] arm64: dts: exynos: Fix silent hang after boot
Date: Sun,  5 Jul 2020 12:27:46 +0530	[thread overview]
Message-ID: <20200705065747.63014-1-alim.akhtar@samsung.com> (raw)
In-Reply-To: CGME20200705071805epcas5p37045f009655c40d573077babf17c51fa@epcas5p3.samsung.com

Once regulators are disabled after kernel boot, on espresso
board silent hang observed because of LDO7 being disabled.
LDO7 actually provide power to CPU cores and non-cpu blocks
circuitries.
Keep this regulator always-on to fix this hang.

Fixes: 9589f7721e16 ("arm64: dts: Add S2MPS15 PMIC node on exynos7-espresso")
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
---
 arch/arm64/boot/dts/exynos/exynos7-espresso.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/exynos/exynos7-espresso.dts b/arch/arm64/boot/dts/exynos/exynos7-espresso.dts
index 790f12ca8981..bb86950032d3 100644
--- a/arch/arm64/boot/dts/exynos/exynos7-espresso.dts
+++ b/arch/arm64/boot/dts/exynos/exynos7-espresso.dts
@@ -157,6 +157,7 @@
 				regulator-min-microvolt = <700000>;
 				regulator-max-microvolt = <1150000>;
 				regulator-enable-ramp-delay = <125>;
+				regulator-always-on;
 			};
 
 			ldo8_reg: LDO8 {

base-commit: 9e50b94b3eb0d859a2586b5a40d7fd6e5afd9210
-- 
2.17.1


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

       reply	other threads:[~2020-07-05  7:18 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20200705071805epcas5p37045f009655c40d573077babf17c51fa@epcas5p3.samsung.com>
2020-07-05  6:57 ` Alim Akhtar [this message]
2020-07-05  6:57   ` [PATCH 1/2] arm64: dts: exynos: Fix silent hang after boot Alim Akhtar
     [not found]   ` <CGME20200705071806epcas5p27abbd5b89689ab16328807bb5a213abf@epcas5p2.samsung.com>
2020-07-05  6:57     ` [PATCH 2/2] arm64: dts: exynos: keep LDO12 always-on Alim Akhtar
2020-07-05  6:57       ` Alim Akhtar

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=20200705065747.63014-1-alim.akhtar@samsung.com \
    --to=alim.akhtar@samsung.com \
    --cc=devicetree@vger.kernel.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-samsung-soc@vger.kernel.org \
    --cc=robh+dt@kernel.org \
    --cc=rzk@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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.