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From: Sarah Emery <sarah.emery@canonical.com>
To: Troy Mitchell <troy.mitchell@linux.spacemit.com>,
	Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>, Yixun Lan <dlan@kernel.org>,
	Paul Walmsley <pjw@kernel.org>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Alexandre Ghiti <alex@ghiti.fr>
Cc: devicetree@vger.kernel.org, linux-riscv@lists.infradead.org,
	spacemit@lists.linux.dev, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/5] riscv: dts: spacemit: k3-com260: Add SPI NOR flash
Date: Fri, 6 Nov 2026 17:25:48 +0100	[thread overview]
Message-ID: <79211469-cf77-414c-9a10-2b684833ad64@canonical.com> (raw)
In-Reply-To: <20261105-k3-com260-module-sd-nor-mac-v1-3-138b39d74602@linux.spacemit.com>

Hi Troy,

 > +			uboot@210000 {
 > +				reg = <0x210000 0x5f0000>;
 > +			};

This partition ends at 0x800000. On the CoM260 with EDK2, 0x700000 to
0x7c0000 holds the variable store (NVRAM and FTW), so reflashing this
partition from Linux would erase it.

I think we could split it like this:

    uboot@210000 {
       reg = <0x210000 0x4f0000>;
    };

    var@700000 {
       reg = <0x700000 0xc0000>;
       read-only;
    };

What do you think?

The Pico-ITX node also uses 0x5f0000, but I think it should be modified 
to split out the var part too if it makes sense here.

The Pico-ITX flash node also has vcc-supply = <&aldo2>.
Shouldn't this be present here as well?

The rest of the patch LGTM and matches what we have already tested in 
the Ubuntu kernel.

Thanks,
Sarah

  reply	other threads:[~2026-11-06 16:25 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-11-05  8:23 [PATCH 0/5] riscv: dts: spacemit: k3-com260: Describe SD card, SPI NOR and MAC Troy Mitchell
2026-11-05  8:23 ` [PATCH 1/5] riscv: dts: spacemit: k3-com260-ifx: Drop wrong SD card vmmc-supply Troy Mitchell
2026-11-05  8:23 ` [PATCH 2/5] riscv: dts: spacemit: k3-com260: Move SD card to the module Troy Mitchell
2026-11-05  8:23 ` [PATCH 3/5] riscv: dts: spacemit: k3-com260: Add SPI NOR flash Troy Mitchell
2026-11-06 16:25   ` Sarah Emery [this message]
2026-11-05  8:23 ` [PATCH 4/5] riscv: defconfig: Enable AT24 EEPROM and ONIE TLV layout Troy Mitchell
2026-11-05 10:42   ` E Shattow
2026-11-05 14:20     ` Troy Mitchell
2026-11-05  8:23 ` [PATCH 5/5] riscv: dts: spacemit: k3-com260: Set Ethernet MAC from EEPROM Troy Mitchell

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