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Mon, 08 Jun 2026 07:54:03 -0700 (PDT) From: =?UTF-8?q?Gr=C3=A9goire=20Layet?= To: joel@jms.id.au, andrew@codeconstruct.com.au Cc: andrew@lunn.ch, jacky_chou@aspeedtech.com, yh_chung@aspeedtech.com, ninad@linux.ibm.com, linux-aspeed@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, =?UTF-8?q?Gr=C3=A9goire=20Layet?= Subject: [PATCH v2 0/2] soc: aspeed: Add BMC and host driver for PCIe BMC device Date: Mon, 8 Jun 2026 14:51:21 +0000 Message-ID: X-Mailer: git-send-email 2.51.2 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This is a v2 for upstreaming the VUART over PCIe BMC device driver from the ASPEED kernel SDK (branch master-v6.18) [1]. There are two drivers: a BMC-side driver and a host-side driver. Together they enable host<->BMC VUART communication via PCIe. This v2 narrows down the scope to VUART support only, to address review feedback on v1 [2] that the additional subsystems (shared memory, doorbell and mailbox) were software-defined IPC channels better used with rpmsg or virtio. Those subsystems are deferred to a separate future series. VUART data flow and MSI interrupts have been verified working on the test hardware. Tested on: BMC: - Asus IPMI Kommando Card R1.01, AST2600 A3. - OpenBMC Host: - Linux kernel v7.0.0 This v2 only supports AST2600; the AST2700 is untested and not supported by this patch. Changes since v1 [2]: - BMC driver: trimmed down to only SCU and PCIe initialization - Host driver: removed shared memory misc device, sysfs doorbell, mailbox setup and message queue handler. Driver now only supports VUART registration. - Host driver: Fixed cleanup path: removed pci_release_regions() call as there was no matching pci_request_regions call [1]: https://github.com/AspeedTech-BMC/linux/tree/aspeed-master-v6.18/drivers/soc/aspeed [2]: https://lore.kernel.org/linux-aspeed/cover.1780409151.git.gregoire.layet@9elements.com/ Grégoire Layet (2): soc: aspeed: add BMC-side PCIe BMC device driver soc: aspeed: add host-side PCIe BMC device driver drivers/soc/aspeed/Kconfig | 15 ++ drivers/soc/aspeed/Makefile | 2 + drivers/soc/aspeed/aspeed-bmc-dev.c | 187 +++++++++++++++++ drivers/soc/aspeed/aspeed-host-bmc-dev.c | 249 +++++++++++++++++++++++ 4 files changed, 453 insertions(+) create mode 100644 drivers/soc/aspeed/aspeed-bmc-dev.c create mode 100644 drivers/soc/aspeed/aspeed-host-bmc-dev.c -- 2.51.2