From: Yixun Lan <dlan@kernel.org>
To: Aurelien Jarno <aurelien@aurel32.net>
Cc: linux-kernel@vger.kernel.org, Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Paul Walmsley <pjw@kernel.org>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Alexandre Ghiti <alex@ghiti.fr>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>,
"open list:RISC-V ARCHITECTURE" <linux-riscv@lists.infradead.org>,
"open list:RISC-V SPACEMIT SoC Support"
<spacemit@lists.linux.dev>
Subject: Re: [PATCH v2 4/4] riscv: dts: spacemit: Add Milk-V Jupiter board (M1)
Date: Thu, 30 Jul 2026 08:54:24 +0000 [thread overview]
Message-ID: <20260730085424-GKK76518@kernel.org> (raw)
In-Reply-To: <20260729160749.1621415-5-aurelien@aurel32.net>
Hi Aurelien,
On 18:00 Wed 29 Jul , Aurelien Jarno wrote:
> Add support for the Milk-V Jupiter board with the M1 CPU. The M1 differs
> from the K1 only by its package, which provides improved cooling
> performance and allows it to run at up to 1.8 GHz instead of 1.6 GHz.
>
> Add m1-opp.dtsi to define the 1.8 GHz operating point and the
> corresponding core voltage, based on the upstream kernel. Include it
> from m1-milkv-jupiter.dts. Raise the maximum buck1 voltage to 1.116V to
> match the new operating point.
>
While checking the schematics, the buck1,2 provide power supply both
for cpu core and AVDD09 domain - check schematics page 9/25 [1]
the R81 is NC, so buck1,2 is actually all power supply, raise voltage will
result high risk to damage the chip (overvoltage of AVDD09 domain), so
a safe strategy would to test if M1 able to run at 1.8G without voltage
change (still at 1.05v)?
Link: https://github.com/milkv-jupiter/jupiter-files/blob/main/hardware/v1_0/jupiter-sch-v1_0.pdf [1]
--
Yixun Lan (dlan)
_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv
next prev parent reply other threads:[~2026-07-30 8:54 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-29 16:00 [PATCH v2 0/4] riscv: dts: spacemit: Add cpu scaling for Milk-V Jupiter Aurelien Jarno
2026-07-29 16:00 ` [PATCH v2 1/4] " Aurelien Jarno
2026-07-29 16:00 ` [PATCH v2 2/4] riscv: dts: spacemit: Add a common board dtsi for Milk-V Jupiter boards Aurelien Jarno
2026-07-29 16:00 ` [PATCH v2 3/4] dt-bindings: riscv: spacemit: add Milk-V Jupiter M1 compatible Aurelien Jarno
2026-07-30 7:26 ` Krzysztof Kozlowski
2026-07-30 10:06 ` Aurelien Jarno
2026-07-29 16:00 ` [PATCH v2 4/4] riscv: dts: spacemit: Add Milk-V Jupiter board (M1) Aurelien Jarno
2026-07-30 8:54 ` Yixun Lan [this message]
2026-07-30 10:13 ` Aurelien Jarno
2026-07-30 11:29 ` Yixun Lan
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=20260730085424-GKK76518@kernel.org \
--to=dlan@kernel.org \
--cc=alex@ghiti.fr \
--cc=aou@eecs.berkeley.edu \
--cc=aurelien@aurel32.net \
--cc=conor+dt@kernel.org \
--cc=devicetree@vger.kernel.org \
--cc=krzk+dt@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-riscv@lists.infradead.org \
--cc=palmer@dabbelt.com \
--cc=pjw@kernel.org \
--cc=robh@kernel.org \
--cc=spacemit@lists.linux.dev \
/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