From: Hiago De Franco <hfranco@baylibre.com>
To: Zhuxu Ran <zhuxu_ran@zohomail.com>
Cc: u-boot@lists.u-boot-project.org, Yao Zi <me@ziyao.cc>,
Tom Rini <trini@konsulko.com>, Johan Jonker <jbx6244@gmail.com>,
Alexander Koch <akoch@initse.com>,
Kongyang Liu <seashell11234455@gmail.com>,
Thomas Bonnefille <thomas.bonnefille@bootlin.com>,
Quentin Schulz <quentin.schulz@cherry.de>,
Peter Robinson <pbrobinson@gmail.com>,
Leo Yu-Chi Liang <leo.liang@sifive.com>,
Casey Connolly <casey.connolly@linaro.org>,
Varadarajan Narayanan <varadarajan.narayanan@oss.qualcomm.com>,
Sumit Garg <sumit.garg@oss.qualcomm.com>,
Heiko Stuebner <heiko@sntech.de>,
Marek Vasut <marek.vasut+renesas@mailbox.org>,
Marek Vasut <marex@nabladev.com>,
Ilias Apalodimas <ilias.apalodimas@linaro.org>
Subject: Re: [PATCH v3 0/3] rtc: cv1800b: Use the RTC node for time and system reset
Date: Wed, 7 Oct 2026 09:16:57 -0300 [thread overview]
Message-ID: <asY4AesoD7a9doj9@hiagonb> (raw)
In-Reply-To: <20261007-cv18xx-rtc-sysreset-v3-0-194557fd5e78@zohomail.com>
On Wed, Oct 07, 2026 at 11:33:04AM +0800, Zhuxu Ran wrote:
> The CV1800B RTC subsystem contains a seconds counter and system reset
> controls in a shared register range. U-Boot currently binds the system
> reset driver from Milk-V Duo board code and accesses fixed MMIO addresses.
> The upstream devicetrees describe this subsystem with an RTC node, but
> U-Boot has no driver matching that node.
>
> Add an RTC driver for the seconds counter, bind the existing system reset
> driver as its child, and obtain the reset register range from the shared
> devicetree node. Keep the existing reset requests unchanged, including
> the warm-reset sequence currently used for SYSRESET_COLD.
>
> This series depends on the CV18xx upstream-devicetree conversion sent
> as v5.
>
> Tested on Milk-V Duo, Milk-V Duo 256M and LicheeRV Nano.
>
> Signed-off-by: Zhuxu Ran <zhuxu_ran@zohomail.com>
Thanks for the patches. For the series:
Reviewed-by: Hiago De Franco <hfranco@baylibre.com>
> ---
> Changes in v3:
> - Rename the RTC driver file to cv1800b.c to match the RTC directory
> convention.
> - Align the CV1800B sysreset register and request-bit definitions.
> - Use uppercase hexadecimal digits in the sysreset driver.
> - Link to v2: https://patch.msgid.link/20261006-cv18xx-rtc-sysreset-v2-0-67872888384e@zohomail.com
>
> Changes in v2:
> - Use CV1800B consistently in the RTC driver filename and identifiers.
> - Link to v1: https://patch.msgid.link/20261003-cv18xx-rtc-sysreset-v1-0-c0837e26eb29@zohomail.com
>
> ---
> Zhuxu Ran (3):
> rtc: cv1800b: Add seconds counter support
> riscv: sophgo: Enable RTC-backed system reset
> sysreset: cv1800b: Use the RTC device node for register access
>
> board/sophgo/milkv_duo/board.c | 5 --
> configs/milkv_duo_256m_defconfig | 2 +
> configs/milkv_duo_defconfig | 2 +
> configs/sipeed_licheerv_nano_defconfig | 2 +
> drivers/rtc/Kconfig | 9 +++
> drivers/rtc/Makefile | 1 +
> drivers/rtc/cv1800b.c | 123 +++++++++++++++++++++++++++++++++
> drivers/sysreset/Kconfig | 6 +-
> drivers/sysreset/sysreset_cv1800b.c | 90 +++++++++++++++---------
> 9 files changed, 199 insertions(+), 41 deletions(-)
> ---
> base-commit: a06e89ab05eaa2b8344d521319399333cd760ae5
> change-id: 20260929-cv18xx-rtc-sysreset-b816e6306348
> prerequisite-message-id: <20260927-milkv-duo-upstream-dts-v5-0-7f64983e59e1@zohomail.com>
> prerequisite-patch-id: b8e6815314b7881a02de0066232864d522c4a26c
> prerequisite-patch-id: 0df1fa5db1b2bff402b429809796bad99a517483
> prerequisite-patch-id: 49e1e8263cf0a5ba8d63c8b598b6382cde5284b2
> prerequisite-patch-id: 86dd30e784f022f0a7bb6fbf125c9699467176d4
> prerequisite-patch-id: 49070c05ecf58331ec519a57d1b82f8b2b835a89
> prerequisite-patch-id: 6b6881e45cc6de6544aaa4509db21611158f4fa1
> prerequisite-patch-id: 7198127d4602eeb14212087ce9bb694d84e71a4c
> prerequisite-patch-id: 3a58bd8a061707ff27b8538d4897def3b595dc36
> prerequisite-patch-id: 9055ea941b73e35d1e825787d7eca14ffceb8e8b
> prerequisite-patch-id: 554c1487e8d596e0099677ca88eee0021b1ffbae
>
> Best regards,
> --
> Zhuxu Ran <zhuxu_ran@zohomail.com>
>
Best regards,
--
Hiago
prev parent reply other threads:[~2026-10-07 12:30 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-07 3:33 [PATCH v3 0/3] rtc: cv1800b: Use the RTC node for time and system reset Zhuxu Ran
2026-10-07 3:33 ` [PATCH v3 1/3] rtc: cv1800b: Add seconds counter support Zhuxu Ran
2026-10-07 22:24 ` Yao Zi
2026-10-07 3:33 ` [PATCH v3 2/3] riscv: sophgo: Enable RTC-backed system reset Zhuxu Ran
2026-10-07 3:33 ` [PATCH v3 3/3] sysreset: cv1800b: Use the RTC device node for register access Zhuxu Ran
2026-10-07 12:16 ` Hiago De Franco [this message]
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