From patchwork Thu Apr 27 18:53:56 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Kaiser X-Patchwork-Id: 13225691 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 886FFC77B61 for ; Thu, 27 Apr 2023 18:55:34 +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:References:In-Reply-To: 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: List-Owner; bh=ehzJ20YszhPV5dycXeYngtdPn8p3TE/tna/Yq2Tx8Xc=; b=KES4K6U4D6sgum VQpK4YjsvU4zt9lbnP1EbvYQfSORwjustcqL7lvtFI54thF3lFwM7ZMx7023dbJWdYRedoXcRJ2Id OioQvmSsxktIFoZaA9By9yyQTbQEYNjnuwdgE2wnwsD1CvtT+25ebc38FFRXT/39q0ANLEaKqNb3y JA5yPtiSxbycDWGwoC1G+ADc2x7gI7GyIul+9UZOzy4GUo15tJ3vkD8EQqd7NDygfIRAcIfkj8vc2 IaQ3fJkCSr/7mp5QcG5EFOJAtPH7HUGST6QlyhG/602u4BG6dkvBWBTaUWdk3o9vxJ4kS1+ti2z7W +ddJw8LxQMbxnFqCwTgQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1ps6lS-007GAs-35; Thu, 27 Apr 2023 18:54:46 +0000 Received: from viti.kaiser.cx ([2a01:238:43fe:e600:cd0c:bd4a:7a3:8e9f]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1ps6lC-007G7k-1D for linux-arm-kernel@lists.infradead.org; Thu, 27 Apr 2023 18:54:32 +0000 Received: from ipservice-092-217-081-249.092.217.pools.vodafone-ip.de ([92.217.81.249] helo=martin-debian-2.paytec.ch) by viti.kaiser.cx with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.89) (envelope-from ) id 1ps6l5-0003RX-Oc; Thu, 27 Apr 2023 20:54:23 +0200 From: Martin Kaiser To: Herbert Xu Cc: linux-crypto@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Martin Kaiser Subject: [PATCH 2/3] hwrng: imx-rngc - use bitfield macros to read rng type Date: Thu, 27 Apr 2023 20:53:56 +0200 Message-Id: <20230427185357.923412-3-martin@kaiser.cx> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230427185357.923412-1-martin@kaiser.cx> References: <20230427185357.923412-1-martin@kaiser.cx> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230427_115430_559793_86535939 X-CRM114-Status: GOOD ( 13.38 ) 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 Use the mechanism from bitfield.h to read the rng type field in the version_id register. This makes the code a tiny bit simpler. Signed-off-by: Martin Kaiser --- drivers/char/hw_random/imx-rngc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/char/hw_random/imx-rngc.c b/drivers/char/hw_random/imx-rngc.c index 861a615ac7df..546dc3655e5b 100644 --- a/drivers/char/hw_random/imx-rngc.c +++ b/drivers/char/hw_random/imx-rngc.c @@ -27,7 +27,7 @@ #define RNGC_FIFO 0x0014 /* the fields in the ver id register */ -#define RNGC_TYPE_SHIFT 28 +#define RNG_TYPE GENMASK(31, 28) #define RNGC_VER_MAJ_SHIFT 8 /* the rng_type field */ @@ -254,7 +254,7 @@ static int imx_rngc_probe(struct platform_device *pdev) return irq; ver_id = readl(rngc->base + RNGC_VER_ID); - rng_type = ver_id >> RNGC_TYPE_SHIFT; + rng_type = FIELD_GET(RNG_TYPE, ver_id); /* * This driver supports only RNGC and RNGB. (There's a different * driver for RNGA.)