From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=114.242.206.163 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793689692; b=PVM6r5ezg8pM4yEq3qeaBqJKLGG9v+T09etxem1JWpGXFZtYrxXunhNxoitJl7j1mIuX RIjypRdZykOwwik5Kkw3Qa/Wa0+LNDToCuO8xkCNmsfFUBY+I+1k/XHR9RqiH1/8ydrrd MmMmB0LOin66Nz0H48gY8eAQcPocv+qyIcJk3NHRkHEyX/aFZZvVT4bBw4lqQgTmRHDrc kOuxiWJShAS/HCNi+j1ojRj59A/k80LZ5BvYY8yEfagI0kRCN5CtaRnX56q8Y6fFejxtI lVMkPPtI2f671XFJ0b5Um5aRgVkc83H0ov0R6SLsh9UX1VuYlsJb1tNnaru6qMxi3UQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793689692; h=DMARC-Filter:Received:Received:From:To:Cc:Subject:Date:Message-ID: X-Mailer:MIME-Version:Content-Transfer-Encoding:X-CM-TRANSID: X-CM-SenderInfo:X-Coremail-Antispam; bh=dFj0a/EKFZ24fIVp+xOvR4+qo4gXBCRZ4uJatICBRCw=; b=NDlaKfESrNhW5U1fRIg/BNWYbu3nfUG7HNGmfB3eXcSMe7UBc7m6pi7xEwXrMoB38Qz4 XZObLYCW3QJhAVT8egOMouqOV2nUxwVKIYxuWvka/fTNFWOzCKDyrGeukl/O6PxL2NNvy aArsIP9bx6tVI9lxCBcefOU41F+S4TwwwnMt/4uUiEj4h9UOWMsxOvVPXChMvFW+Nf6hL sa+NbWAKpXcU6kWkwBr9nZATN0tHsS/r0lBARlFJVVqw8MqvlSwM7Dg5f3i0x78bzXet/ lfNlc9I9PZLS64C9pmoV+K+VTd/xwhf79ZSyd/BxSwpMR5sVCamcXjDaCtKeKCCBWMA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none header.from=loongson.cn; spf=pass smtp.mailfrom=loongson.cn; arc=none smtp.remote-ip=114.242.206.163 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id B6ED0606A324 for ; Tue, 3 Nov 2026 07:08:10 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org B6ED0606A324 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [223.64.69.17]) by gateway (Coremail) with SMTP id _____8AxHNJYiOlqmNwbAA--.15373S3; Tue, 03 Nov 2026 15:08:08 +0800 (CST) Received: from kernelserver (unknown [223.64.69.17]) by front1 (Coremail) with SMTP id qMiowJCxtMxXiOlq4BQyAA--.11182S2; Tue, 03 Nov 2026 15:08:08 +0800 (CST) From: Binbin Zhou To: Binbin Zhou , Huacai Chen , Yinbo Zhu , Mark Brown Cc: Huacai Chen , Xuerui Wang , loongarch@lists.linux.dev, linux-spi@vger.kernel.org, Binbin Zhou Subject: [PATCH 0/8] spi: loongson: Fixes, cleanup and IRQ support Date: Tue, 3 Nov 2026 15:07:47 +0800 Message-ID: X-Mailer: git-send-email 2.52.0 X-Mailing-List: linux-spi@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID:qMiowJCxtMxXiOlq4BQyAA--.11182S2 X-CM-SenderInfo: p2kr3uplqex0o6or00hjvr0hdfq/1tbiAgEACGrpUP0DZQAAsD X-Coremail-Antispam: 1Uk129KBj93XoW7uF4kJw48GryxCw1UJw13trc_yoW8ZryUpF W3Gas8CF17JFWxZrnxAa40vFy5Z393GF45KayxJw45ur90y34Yvrn8tFyYyay7JryxJ3Wj vry8K3WxCF4rCrXCm3ZEXasCq-sJn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7ZEXa sCq-sGcSsGvfJ3Ic02F40EFcxC0VAKzVAqx4xG6I80ebIjqfuFe4nvWSU5nxnvy29KBjDU 0xBIdaVrnRJUUUkYb4IE77IF4wAFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2 IYs7xG6rWj6s0DM7CIcVAFz4kK6r1Y6r17M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48v e4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Jr0_JF4l84ACjcxK6xIIjxv20xvEc7CjxVAFwI 0_Jr0_Gr1l84ACjcxK6I8E87Iv67AKxVWxJVW8Jr1l84ACjcxK6I8E87Iv6xkF7I0E14v2 6r4UJVWxJr1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqjxCEc2xF0cIa020Ex4CE44I27w Aqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_Jr0_Jr4lYx0Ex4A2jsIE 14v26r1j6r4UMcvjeVCFs4IE7xkEbVWUJVW8JwACjcxG0xvY0x0EwIxGrwCF04k20xvY0x 0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E 7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcV C0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Jr0_Gr1lIxAIcVCF 04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r1j6r4UMIIF0xvEx4A2jsIEc7 CjxVAFwI0_Jr0_GrUvcSsGvfC2KfnxnUUI43ZEXa7IU8xuctUUUUU== Hi all: This series fixes several long-standing bugs in the Loongson SPI controller driver, cleans up the core driver, and adds interrupt-driven transfers with a polling fallback. The series is grouped as follows: Bug fixes (suitable for stable): 1. Fix the SPI mode caching logic so mode bits can be cleared. 2. Fix the chip-select idle level for SPI_CS_HIGH devices. 3. Separate PM register state from runtime register usage. 4. Fix the clock divider calculation with an explicit divider table. Robustness and cleanup: 5. Support the ACPI "clock-frequency" property and validate the input clock rate during probe. 6. Move private register definitions and the private controller structure into the core driver. 7. Convert the driver to the regmap-mmio API. New feature: 8. Add interrupt-driven transfers, keeping polling as a fallback when no IRQ is available. The IRQ path also brings a significant performance improvement. On a Loongson-2K3000 board, reading SPI flash with dd improved from about 50 kB/s in polling mode to about 382 kB/s with IRQ-driven transfers, roughly 7.6x faster. Binbin. Thanks. Binbin Zhou (8): spi: loongson: Fix incorrect SPI mode caching logic spi: loongson: Fix CS idle state for SPI_CS_HIGH devices spi: loongson: Make suspend/resume registers PM-specific spi: loongson: Fix clock divider calculation with explicit table spi: loongson: Support ACPI clock-frequency and add error handling spi: loongson: Move private definitions into the core driver spi: loongson: Convert to regmap API spi: loongson: Add interrupt support for SPI controller drivers/spi/spi-loongson-core.c | 566 ++++++++++++++++++++++++-------- drivers/spi/spi-loongson-pci.c | 25 +- drivers/spi/spi-loongson-plat.c | 17 +- drivers/spi/spi-loongson.h | 48 +-- 4 files changed, 457 insertions(+), 199 deletions(-) base-commit: 8ab8c079820e6134bc0d8c312244644afb66ae9c -- 2.52.0