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Tue, 30 Dec 2025 06:29:40 -0800 (PST) Received: from localhost ([211.94.234.112]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2a2f3c6a80esm298183155ad.8.2025.12.30.06.29.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 30 Dec 2025 06:29:40 -0800 (PST) From: Encrow Thorne Subject: [PATCH v3 0/3] i2c: spacemit: add reset support Date: Tue, 30 Dec 2025 22:29:01 +0800 Message-Id: <20251230-i2c-reset-v3-0-7500eb93b06e@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=H4sIAK3hU2kC/03MywrCMBCF4Vcps3Ykmai1rnwP6SImYztgLyQlK CXvbiwILv/D4VshchCOcKlWCJwkyjSWMLsKXG/HjlF8aSBFR036jEIOA0de0NZ31qYhbTxD+c+ BH/LarFtbupe4TOG90Ym+609p/pREqNB6UtqeFHF9uHaDlefeTQO0OecPQOy0fKIAAAA= 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=1767104943; l=1371; i=jyc0019@gmail.com; s=20251009; h=from:subject:message-id; bh=a1J69aM75aks5NKEgsk6GGcoN5bgwi6MKrm7NlrTPLc=; b=18EDF1Yo3gil3UtsnPjnP04wMrhNkhNbTfRqJtMQTnJdkoA05tCeC3CideDM+jpKg5I8J2niZ Bu9piLwlLabC0cfTZuCfH/4VcODZZNdWNjER3S6w/QX91MM1paamAdS 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 v3: - Move reset property in dt-bindings. - Use devm_reset_control_get_optional_exclusive_deasserted() instead. - Rebase to v6.19-rc1. - Link to v2: https://lore.kernel.org/r/20251219-i2c-reset-v2-0-ad201a602e74@gmail.com 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