From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Sasha Levin <sashal@kernel.org>,
devicetree@vger.kernel.org, linux-samsung-soc@vger.kernel.org,
Krzysztof Kozlowski <krzk@kernel.org>,
Alim Akhtar <alim.akhtar@samsung.com>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH AUTOSEL 4.9 3/9] arm64: dts: exynos: Fix silent hang after boot on Espresso
Date: Sat, 8 Aug 2020 19:40:30 -0400 [thread overview]
Message-ID: <20200808234037.3619732-3-sashal@kernel.org> (raw)
In-Reply-To: <20200808234037.3619732-1-sashal@kernel.org>
From: Alim Akhtar <alim.akhtar@samsung.com>
[ Upstream commit b072714bfc0e42c984b8fd6e069f3ca17de8137a ]
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>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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 c528dd52ba2d3..2f7d144d556da 100644
--- a/arch/arm64/boot/dts/exynos/exynos7-espresso.dts
+++ b/arch/arm64/boot/dts/exynos/exynos7-espresso.dts
@@ -131,6 +131,7 @@ ldo7_reg: LDO7 {
regulator-min-microvolt = <700000>;
regulator-max-microvolt = <1150000>;
regulator-enable-ramp-delay = <125>;
+ regulator-always-on;
};
ldo8_reg: LDO8 {
--
2.25.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next parent reply other threads:[~2020-08-09 0:03 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200808234037.3619732-1-sashal@kernel.org>
2020-08-08 23:40 ` Sasha Levin [this message]
2020-08-08 23:40 ` [PATCH AUTOSEL 4.9 8/9] ARM: at91: pm: add missing put_device() call in at91_pm_sram_init() Sasha Levin
2020-08-08 23:40 ` [PATCH AUTOSEL 4.9 9/9] ARM: socfpga: PM: add missing put_device() call in socfpga_setup_ocram_self_refresh() Sasha Levin
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=20200808234037.3619732-3-sashal@kernel.org \
--to=sashal@kernel.org \
--cc=alim.akhtar@samsung.com \
--cc=devicetree@vger.kernel.org \
--cc=krzk@kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-samsung-soc@vger.kernel.org \
--cc=stable@vger.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).