From: Jon Hunter <jonathanh@nvidia.com>
To: Thierry Reding <thierry.reding@gmail.com>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>
Cc: devicetree@vger.kernel.org, linux-tegra@vger.kernel.org,
Jon Hunter <jonathanh@nvidia.com>,
stable@vger.kernel.org
Subject: [PATCH 2/3] arm64: tegra: Update Jetson TX1 GPU regulator timings
Date: Thu, 20 Jun 2019 09:17:01 +0100 [thread overview]
Message-ID: <20190620081702.17209-3-jonathanh@nvidia.com> (raw)
In-Reply-To: <20190620081702.17209-1-jonathanh@nvidia.com>
The GPU regulator enable ramp delay for Jetson TX1 is set to 1ms which
not sufficient because the enable ramp delay has been measured to be
greater than 1ms. Furthermore, the downstream kernels released by NVIDIA
for Jetson TX1 are using a enable ramp delay 2ms and a settling delay of
160us. Update the GPU regulator enable ramp delay for Jetson TX1 to be
2ms and add a settling delay of 160us.
Cc: stable@vger.kernel.org
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
---
arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi b/arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi
index e8654061ce03..27723829d033 100644
--- a/arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi
@@ -341,7 +341,8 @@
regulator-max-microvolt = <1320000>;
enable-gpios = <&pmic 6 GPIO_ACTIVE_HIGH>;
regulator-ramp-delay = <80>;
- regulator-enable-ramp-delay = <1000>;
+ regulator-enable-ramp-delay = <2000>;
+ regulator-settling-time-us = <160>;
};
};
};
--
2.17.1
next prev parent reply other threads:[~2019-06-20 8:17 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-20 8:16 [PATCH 0/3] arm64: tegra: A few device-tree fixes Jon Hunter
2019-06-20 8:17 ` [PATCH 1/3] arm64: tegra: Fix AGIC register range Jon Hunter
2019-06-20 9:13 ` Thierry Reding
2019-06-20 8:17 ` Jon Hunter [this message]
2019-06-20 9:18 ` [PATCH 2/3] arm64: tegra: Update Jetson TX1 GPU regulator timings Thierry Reding
2019-06-20 8:17 ` [PATCH 3/3] arm64: tegra: Fix Jetson Nano GPU regulator Jon Hunter
2019-06-20 9:19 ` Thierry Reding
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=20190620081702.17209-3-jonathanh@nvidia.com \
--to=jonathanh@nvidia.com \
--cc=devicetree@vger.kernel.org \
--cc=linux-tegra@vger.kernel.org \
--cc=mark.rutland@arm.com \
--cc=robh+dt@kernel.org \
--cc=stable@vger.kernel.org \
--cc=thierry.reding@gmail.com \
/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).