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Thu, 18 Dec 2025 23:42:32 -0800 (PST) Received: from localhost ([221.192.179.86]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7ff7e493123sm1489676b3a.50.2025.12.18.23.42.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 18 Dec 2025 23:42:31 -0800 (PST) From: Encrow Thorne Subject: [PATCH v2 0/3] i2c: spacemit: add reset support Date: Fri, 19 Dec 2025 15:42:19 +0800 Message-Id: <20251219-i2c-reset-v2-0-ad201a602e74@gmail.com> 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: 7bit X-B4-Tracking: v=1; b=H4sIANsBRWkC/6tWKk4tykwtVrJSqFYqSi3LLM7MzwNyjHQUlJIzE vPSU3UzU4B8JSMDI1NDI0ML3UyjZN2i1OLUEt1E86RUQ2NLI0PjlFQloPqCotS0zAqwWdGxtbU Ao4A1YFsAAAA= X-Change-ID: 20251218-i2c-reset-a7be139213de To: Troy Mitchell , Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Yixun Lan , Philipp Zabel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti Cc: Troy Mitchell , Guodong Xu , linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, spacemit@lists.linux.dev, linux-kernel@vger.kernel.org, Encrow Thorne X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1766130147; l=1131; i=jyc0019@gmail.com; s=20251009; h=from:subject:message-id; bh=qNd7Kkg/H2zhSsCmeKqv5XE2BPxplo29/JW30z7IwFc=; b=IP9PYiLnxh4jarsPPV3BBgqvdAZV84EWSlqmOsx0gleAv9VAbPkrnmv1JaYOb/jF/whJbat21 mM7tks7h+8dDHF63uWqww3whwCH//d9Myr1eKBAj41dpiIhog/DiS+4 X-Developer-Key: i=jyc0019@gmail.com; a=ed25519; pk=nnjLv04DUE0FXih6IcJUOjWFTEoo4xYQOu7m5RRHvZ4= Add reset support for the K1 I2C driver. A reset ensures that the controller starts in a clean and known state. Reset ensures that the I2C hardware is in a clean state. We cannot assume that no program used I2C before the kernel booted. Signed-off-by: Encrow Thorne --- Changes in v2: - Replace reset property in dt-bindings. - Use devm_reset_control_get_optional_exclusive_deasserted() instead. - Rebase to v6.19-rc1. - Link to v1: https://lore.kernel.org/r/20251119-i2c-k1_reset-support-v1-0-0e9e82bf9b65@gmail.com --- Encrow Thorne (3): dt-bindings: i2c: spacemit: add optional resets i2c: k1: add reset support riscv: dts: spacemit: add reset property Documentation/devicetree/bindings/i2c/spacemit,k1-i2c.yaml | 3 +++ arch/riscv/boot/dts/spacemit/k1.dtsi | 8 ++++++++ drivers/i2c/busses/i2c-k1.c | 7 +++++++ 3 files changed, 18 insertions(+) --- base-commit: 8f0b4cce4481fb22653697cced8d0d04027cb1e8 change-id: 20251218-i2c-reset-a7be139213de Best regards, -- Encrow Thorne