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(unknown [172.20.64.188]) by smtprelay.cixcomputing.com (Postfix) with ESMTPSA id 391CD41C0145; Mon, 27 Oct 2025 16:42:40 +0800 (CST) From: Jun Guo To: peter.chen@cixtech.com, fugang.duan@cixtech.com, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, broonie@kernel.org Cc: linux-spi@vger.kernel.org, michal.simek@amd.com, cix-kernel-upstream@cixtech.com, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Jun Guo Subject: [PATCH v2 0/3] spi-cadence: support transmission with bits_per_word of 16 and 32 Date: Mon, 27 Oct 2025 16:42:36 +0800 Message-Id: <20251027084239.2610141-1-jun.guo@cixtech.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SG1PEPF000082E5:EE_|PUZPR06MB5748:EE_ X-MS-Office365-Filtering-Correlation-Id: 6ca77c2d-243c-4c10-4d98-08de1534ca73 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|36860700013|82310400026|376014; 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X-OriginatorOrg: cixtech.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 Oct 2025 08:42:41.0424 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 6ca77c2d-243c-4c10-4d98-08de1534ca73 X-MS-Exchange-CrossTenant-Id: 0409f77a-e53d-4d23-943e-ccade7cb4811 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=0409f77a-e53d-4d23-943e-ccade7cb4811;Ip=[222.71.101.198];Helo=[smtprelay.cixcomputing.com] X-MS-Exchange-CrossTenant-AuthSource: SG1PEPF000082E5.apcprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PUZPR06MB5748 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251027_014252_035684_711EDC98 X-CRM114-Status: GOOD ( 12.67 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The Cadence SPI IP supports configurable FIFO data widths during integration. On some SoCs, the FIFO data width is designed to be 16 or 32 bits at the chip design stage. However, the current driver only supports communication with an 8-bit FIFO data width. Therefore, these patches are added to enable the driver to support communication with 16-bit and 32-bit FIFO data widths. This series introduces the following enhancements for Cadence SPI controller support on arm64 platforms: Patch 1: Add a compatible string "cix,sky1-spi-r1p6" for the cix sky1 SoC. Patch 2: Update DT binding docs to support cix sky1 SoC. Patch 3: Enhance the SPI Cadence driver to support data transmission with bits_per_word values of 16 and 32. The CIX Sky1 SPI supported patch is added: https://lore.kernel.org/all/20250919013118.853078-1-jun.guo@cixtech.com/ The patches have been tested on CIX SKY1 platform. Changes for v2: - Remove the fifo-width property and add a compatible string for the cix sky1 SoC to control the FIFO data width configuration. Jun Guo (3): arm64: dts: cix: add a compatible string for the cix sky1 SoC dt-bindings: spi: spi-cadence: update DT binding docs to support cix sky1 SoC spi: spi-cadence: supports transmission with bits_per_word of 16 and 32 .../devicetree/bindings/spi/spi-cadence.yaml | 11 +- arch/arm64/boot/dts/cix/sky1.dtsi | 4 +- drivers/spi/spi-cadence.c | 106 +++++++++++++++--- 3 files changed, 103 insertions(+), 18 deletions(-) -- 2.34.1