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Tue, 3 Nov 2026 02:52:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793674363; bh=7lZGGFM47Y+vesCqWyVDCjfCNRXmTtOZ6DpDFv9Q2ho=; h=From:Subject:Date:To:Cc:Reply-To; b=LvhSP70rtb+nmlPhywjZdyZfgyVEprXdhilWqpvHV1bViyJgLK2D3PnRM/f/GSyQ8 G+HNacYDlpUCoaiLL66H0IRb8UUmikr7y+aoI4SzDLFJ8SVsuBX+OZJw9szn4vn2lw bIEFgcq/YN9UU9HQAlsG5GWwjK5Dmshjs8kzqm0bIcrAi5/eLBDafdcb8FYzdEikGZ fk3ped3BQavbsVjELpzkPFlFhx8PDHPsXlu+8L7l3P+uWz9NAq9Xk1X+Qn5lL+aw1J yVkaQX4NinV48jP3vq3IprxBtVxxTDLvSbK+GNv273EcHAC91pJhgCavZuU2FK4YlL n9x6dm8OMt90w== Received: from nexus.subspace.kernel.org (localhost [IPv6:::1]) by lkml.kernel.org (Postfix) with ESMTP id 0B5044672E; Tue, 3 Nov 2026 02:52:42 +0000 (UTC) From: Xianwei Zhao via B4 Relay Subject: [PATCH v5 0/2] i2c: Add driver support Amlogic A9 I2C Date: Tue, 03 Nov 2026 02:52:36 +0000 Message-Id: <20261103-a9-i2c-v5-0-86f2dcd179d8@amlogic.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAHRM6WoC/2XNQW7DIBAF0KtErEsLA9jQVe9RZQGTcYzU2BVEV qLId+8QtW6rLP/wH/8mKpVMVbzubqLQkmueJw7uaSdwjNORZD5wFqCgU0FrGYPMgBKs7T0BUOe N4HKKlWQqccKx1bny0moTXc7t+bPQkC/3nfc95zHX81yu99lFt+v3AtifhUVLJZOPh5BsN9jo3 +LpYz5mfMb5JNonC2xQK4ANAkPryCANundpeITmLwwbNAz7ZBQiKuWMeYT2F7LcoGXoou4CaJc 8hf9wXdcvYY7cfmgBAAA= X-Change-ID: 20260911-a9-i2c-24478e22e683 To: Junyi Zhao , Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Xianwei Zhao Cc: Junyi Zhao , linux-i2c@vger.kernel.org, linux-amlogic@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Xianwei Zhao , Conor Dooley X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1793674360; l=2121; i=xianwei.zhao@amlogic.com; s=20251216; h=from:subject:message-id; bh=7+M64M86zXRcRp+mwvX7/HRiZidre0O5p+ZpTs5Dazo=; b=evoz4ROMlBv7BzBePEzTMgLz6aLHhAzwRqQXGqgAFaenx2tn5l1NLmjYiP1hcCK1tIA0RvDPo BrKfkqihec7ClBmyafbmm3JTfxsN6lkfa3ba6hSg/m/yD6tVmEIXXik X-Developer-Key: i=xianwei.zhao@amlogic.com; a=ed25519; pk=dWwxtWCxC6FHRurOmxEtr34SuBYU+WJowV/ZmRJ7H+k= X-Endpoint-Received: by B4 Relay for xianwei.zhao@amlogic.com/20251216 with auth_id=578 X-Original-From: Xianwei Zhao Reply-To: xianwei.zhao@amlogic.com Add a Device Tree binding and driver for the I2C controller found on the Amlogic A9 SoC. Signed-off-by: Xianwei Zhao --- Changes in v5: - Mask out I2C_FUNC_SMBUS_QUICK and return I2C_FUNC_I2C | (I2C_FUNC_SMBUS_EMUL & ~I2C_FUNC_SMBUS_QUICK). - Link to v4: https://lore.kernel.org/r/20261102-a9-i2c-v4-0-5a169215b8e9@amlogic.com Changes in v4: - Repocess xfer len equal 0 use I2C_AQ_NO_ZERO_LEN, and Optimized the function. - Disable A9_RX_THRESH_READ/A9_TX_THRESH_WRITE enables of irq when xfer timeout. - Use guard(spinlock_irqsave) instead for direct call spinlock in xfer timeout process. - Link to v3: https://lore.kernel.org/r/20261029-a9-i2c-v3-0-7b30ccc00533@amlogic.com Changes in v3: - Based on the questions raised by the robot, the data flow was reorganized. - Some processing was optimized according to Andi's and Markus's suggestions. - Link to v2: https://lore.kernel.org/r/20261022-a9-i2c-v2-0-45e3cef175bf@amlogic.com Changes in v2: - dtbinding: make some minor modifications, suggestted by Conor and robot. - driver: Make some adjustments, including macro definitions, format adjustments, adding quirks, process optimization, and so on. According to Andi and robot's suggestion - Give up MAINTAINERS file the separate submission, make it together with the driver. - Link to v1: https://lore.kernel.org/r/20260924-a9-i2c-v1-0-b8ad9b46f4a8@amlogic.com --- Junyi Zhao (1): i2c: amlogic: Add Amlogic A9 I2C controller driver Xianwei Zhao (1): dt-bindings: i2c: add Amlogic A9 I2C controller .../devicetree/bindings/i2c/amlogic,a9-i2c.yaml | 56 +++ MAINTAINERS | 9 + drivers/i2c/busses/Kconfig | 8 + drivers/i2c/busses/Makefile | 1 + drivers/i2c/busses/i2c-amlogic-a9.c | 431 +++++++++++++++++++++ 5 files changed, 505 insertions(+) --- base-commit: 4ec2365c08de306f52650d8736aef5862baedb8d change-id: 20260911-a9-i2c-24478e22e683 Best regards, -- Xianwei Zhao