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Wed, 14 Oct 2026 12:30:32 -0700 (PDT) Date: Thu, 15 Oct 2026 03:30:28 +0800 From: Kuan-Wei Chiu To: Hung-Chun Tseng Cc: Bin Meng , Tom Rini , Simon Glass , Heinrich Schuchardt , u-boot@lists.u-boot-project.org Subject: Re: [PATCH v2 2/3] doc: virtio: Mention the RTC device Message-ID: References: <20261014190631.2232208-1-alan.tseng.cs@gmail.com> <20261014190631.2232208-3-alan.tseng.cs@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261014190631.2232208-3-alan.tseng.cs@gmail.com> X-BeenThere: u-boot@lists.u-boot-project.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.u-boot-project.org Hi Hung-Chun, On Thu, Oct 15, 2026 at 03:06:30AM +0800, Hung-Chun Tseng wrote: > The list of supported device types still only named network and block > devices. Add the entropy, 9P and RTC devices, and note that the virtio > RTC device needs QEMU v11.1.0 or later. > > Signed-off-by: Hung-Chun Tseng > Reviewed-by: Bin Meng > --- > doc/develop/driver-model/virtio.rst | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > Nit: Since this patch also mentions other virtio devices, the subject title should be updated to reflect that rather than only mentioning the RTC. > diff --git a/doc/develop/driver-model/virtio.rst b/doc/develop/driver-model/virtio.rst > index e5da9f430..211304706 100644 > --- a/doc/develop/driver-model/virtio.rst > +++ b/doc/develop/driver-model/virtio.rst > @@ -28,7 +28,7 @@ queues configuration and buffer transfers are nearly identical. Both MMIO > and PCI transport options are supported in U-Boot. > > The VirtIO spec defines a lots of VirtIO device types, however at present only > -network and block device, the most two commonly used devices, are supported. > +network, block, entropy (rng), 9P transport and RTC devices are supported. Since u-boot supports more virtio drivers now and likely even more in the future, I'm wondering if we should present them as a bulleted list for better clarity, rather than listing them inline in a sentence. Regards, Kuan-Wei > > The following QEMU targets are supported. > > @@ -72,6 +72,8 @@ Requirements > ------------ > It is required that QEMU v2.5.0+ should be used to test U-Boot VirtIO support > on QEMU ARM and x86, and v2.12.0+ on QEMU RISC-V. > +The VirtIO RTC device (``-device virtio-rtc-pci`` or > +``-device virtio-rtc-device``) requires QEMU v11.1.0+. > > Testing > ------- > -- > 2.43.0 >