From: Alex Elder <elder@riscstar.com>
To: Yao Zi <ziyao@disroot.org>, Yixun Lan <dlan@gentoo.org>
Cc: broonie@kernel.org, robh@kernel.org, krzk+dt@kernel.org,
conor+dt@kernel.org, linux-spi@vger.kernel.org,
devicetree@vger.kernel.org, paul.walmsley@sifive.com,
palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr,
p.zabel@pengutronix.de, spacemit@lists.linux.dev,
linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/3] riscv: dts: spacemit: define a SPI controller node
Date: Thu, 18 Sep 2025 11:22:23 -0500 [thread overview]
Message-ID: <c32cc8da-6703-496f-b30f-4961aa811869@riscstar.com> (raw)
In-Reply-To: <aMwYRGjTdbQCJf3S@pie>
On 9/18/25 9:33 AM, Yao Zi wrote:
>> .. em, so the SPI will use pdma, then probably you should also adjust Kconfig to
>> select PDMA driver?
> The driver seems to depend on the generic DMA engine API only, IOW,
> theoretically it should work with other DMA controller as well. And it's
> even capable to operate without DMA (see k1_spi_dma_setup()).
>
> Dependency to PDMA really doesn't seem something should be enforced in
> Kconfig: it doesn't exist in code level, and the driver is actually more
> flexible.
You're right on both points. The code doesn't *require* PDMA to
operate correctly (to my knowledge).
Yixun, what do you think?
-Alex
next prev parent reply other threads:[~2025-09-18 16:22 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-17 22:07 [PATCH 0/3] spi: support the SpacemiT K1 SPI controller Alex Elder
2025-09-17 22:07 ` [PATCH 1/3] dt-bindings: spi: add SpacemiT K1 SPI support Alex Elder
2025-09-17 23:15 ` Yixun Lan
2025-09-17 23:40 ` Alex Elder
2025-09-18 0:16 ` Yixun Lan
2025-09-18 2:59 ` Alex Elder
2025-09-18 7:43 ` Troy Mitchell
2025-09-18 12:00 ` Alex Elder
2025-09-18 19:57 ` Rob Herring
2025-09-18 20:02 ` Alex Elder
2025-10-06 8:10 ` Krzysztof Kozlowski
2025-09-17 22:07 ` [PATCH 2/3] spi: spacemit: introduce SpacemiT K1 SPI controller driver Alex Elder
2025-09-18 7:47 ` Troy Mitchell
2025-09-18 12:00 ` Alex Elder
2025-09-18 12:41 ` Yixun Lan
2025-09-18 13:45 ` Alex Elder
2025-09-18 14:39 ` Yixun Lan
2025-09-18 14:47 ` Alex Elder
2025-09-18 14:56 ` Yixun Lan
2025-09-18 15:44 ` Alex Elder
2025-09-18 15:58 ` Alex Elder
2025-09-18 16:22 ` Alex Elder
2025-09-17 22:07 ` [PATCH 3/3] riscv: dts: spacemit: define a SPI controller node Alex Elder
2025-09-18 13:32 ` Yixun Lan
2025-09-18 13:51 ` Alex Elder
2025-09-18 14:06 ` Yixun Lan
2025-09-18 14:20 ` Alex Elder
2025-09-18 15:04 ` Yixun Lan
2025-09-18 14:33 ` Yao Zi
2025-09-18 16:22 ` Alex Elder [this message]
2025-09-19 15:25 ` Alex Elder
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=c32cc8da-6703-496f-b30f-4961aa811869@riscstar.com \
--to=elder@riscstar.com \
--cc=alex@ghiti.fr \
--cc=aou@eecs.berkeley.edu \
--cc=broonie@kernel.org \
--cc=conor+dt@kernel.org \
--cc=devicetree@vger.kernel.org \
--cc=dlan@gentoo.org \
--cc=krzk+dt@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-riscv@lists.infradead.org \
--cc=linux-spi@vger.kernel.org \
--cc=p.zabel@pengutronix.de \
--cc=palmer@dabbelt.com \
--cc=paul.walmsley@sifive.com \
--cc=robh@kernel.org \
--cc=spacemit@lists.linux.dev \
--cc=ziyao@disroot.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
all inboxes | Powered by JetHome®