From patchwork Thu Jan 12 04:38:09 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jia Jie Ho X-Patchwork-Id: 13097520 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id AB1D2C54EBD for ; Thu, 12 Jan 2023 04:39:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:CC :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=jJxsTD4ja15d1WvJLH+df0MB3B/Am6CiqCSDxd84ydc=; b=c79JvH/3TaIRNz 08oinDxnSoaQHFCP53dcH91U6Vcp/2XHoFN2Hkm3N8KzQgE8/vDJRazGQVpJdZJIg2qNbnbAgs6nd QH/N0RgZBbV6IGbAN0LA/lItJD36QpMIPahUyLvFPM1B1xFLXqtLZ+ke5fb4NF6HaffC+YhE7W2qM j0yVjpNoCLLFn5j09mSe/qoqvdJqKu7KOUkt+PUvJlCp+EK51/huvLzisJrHG2XqG1jYQqzGMwbw/ ahX14fbv6IauJEQBKo7AsA6dRkvXP6zUd7+y9SeFzby+eweyOnWEkbEd+NiyjCzULnsEwb78arU/f shDGYUWxf72jh5K5KTTw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pFpMs-00DjTq-Cb; Thu, 12 Jan 2023 04:39:10 +0000 Received: from ex01.ufhost.com ([61.152.239.75]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pFpMp-00DjOQ-MW for linux-riscv@lists.infradead.org; Thu, 12 Jan 2023 04:39:09 +0000 Received: from EXMBX165.cuchost.com (unknown [175.102.18.54]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "EXMBX165", Issuer "EXMBX165" (not verified)) by ex01.ufhost.com (Postfix) with ESMTP id A38A424DBC0; Thu, 12 Jan 2023 12:38:19 +0800 (CST) Received: from EXMBX168.cuchost.com (172.16.6.78) by EXMBX165.cuchost.com (172.16.6.75) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Thu, 12 Jan 2023 12:38:19 +0800 Received: from ubuntu.localdomain (202.188.176.82) by EXMBX168.cuchost.com (172.16.6.78) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Thu, 12 Jan 2023 12:38:15 +0800 From: Jia Jie Ho To: Olivia Mackall , Herbert Xu , Rob Herring , "Krzysztof Kozlowski" , Emil Renner Berthing , Conor Dooley CC: , , , Subject: [PATCH v4 0/3] hwrng: starfive: Add driver for TRNG module Date: Thu, 12 Jan 2023 12:38:09 +0800 Message-ID: <20230112043812.150393-1-jiajie.ho@starfivetech.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Originating-IP: [202.188.176.82] X-ClientProxiedBy: EXCAS064.cuchost.com (172.16.6.24) To EXMBX168.cuchost.com (172.16.6.78) X-YovoleRuleAgent: yovoleflag X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230111_203907_913972_63B1E8DA X-CRM114-Status: GOOD ( 13.95 ) X-BeenThere: linux-riscv@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-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org This patch series adds kernel support for StarFive hardware random number generator. First 2 patches add binding docs and device driver for this module. Patch 3 adds devicetree entry for VisionFive 2 SoC. Patch 3 needs to be applied on top of: https://patchwork.kernel.org/project/linux-riscv/patch/20221220011247.35560-7-hal.feng@starfivetech.com/ Patch 3 also depends on additional clock and reset patches for stg domain that are yet to be submitted to mailing list. Changes v3 -> v4: - move init completion before IRQ registration to be prepared for spurious interrupts. (Herbert) - add locks to guard concurrent write to same register in Patch 2. (Herbert) Changes v2 -> v3: - use constant usecs and convert to jiffies in Patch 2. (Herbert) - remove sleep in irq handler in Patch 2. (Herbert) - limit wait timer to 40us if wait == 0 for trng read. (Herbert) Changes v1 -> v2: - updated of_match_ptr and added pm_sleep_ptr in Patch 2. (by Krzysztof) - drop "status" in dts as module is always on in Patch 3. (by Krzysztof) Jia Jie Ho (3): dt-bindings: rng: Add StarFive TRNG module hwrng: starfive - Add TRNG driver for StarFive SoC riscv: dts: starfive: Add TRNG node for VisionFive 2 .../bindings/rng/starfive,jh7110-trng.yaml | 55 +++ MAINTAINERS | 6 + arch/riscv/boot/dts/starfive/jh7110.dtsi | 10 + drivers/char/hw_random/Kconfig | 11 + drivers/char/hw_random/Makefile | 1 + drivers/char/hw_random/starfive-trng.c | 397 ++++++++++++++++++ 6 files changed, 480 insertions(+) create mode 100644 Documentation/devicetree/bindings/rng/starfive,jh7110-trng.yaml create mode 100644 drivers/char/hw_random/starfive-trng.c