From patchwork Fri Dec 18 10:57:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthias Brugger X-Patchwork-Id: 345535 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.0 required=3.0 tests=BAYES_00, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 07CB9C47434 for ; Fri, 18 Dec 2020 10:58:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D676E23A82 for ; Fri, 18 Dec 2020 10:58:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389292AbgLRK57 (ORCPT ); Fri, 18 Dec 2020 05:57:59 -0500 Received: from mail.kernel.org ([198.145.29.99]:41312 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389291AbgLRK57 (ORCPT ); Fri, 18 Dec 2020 05:57:59 -0500 From: matthias.bgg@kernel.org Authentication-Results: mail.kernel.org; dkim=permerror (bad message/signature format) To: mpm@selenic.com, herbert@gondor.apana.org.au, rjui@broadcom.com, sbranden@broadcom.com, f.fainelli@gmail.com Cc: linux-kernel@vger.kernel.org, Julia.Lawall@inria.fr, bcm-kernel-feedback-list@broadcom.com, linux-arm-kernel@lists.infradead.org, nsaenzjulienne@suse.de, linux-crypto@vger.kernel.org, Matthias Brugger Subject: [PATCH v2 2/2] hwrng: iproc-rng200: Move enable/disable in separate function Date: Fri, 18 Dec 2020 11:57:08 +0100 Message-Id: <20201218105708.28480-2-matthias.bgg@kernel.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201218105708.28480-1-matthias.bgg@kernel.org> References: <20201218105708.28480-1-matthias.bgg@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org From: Matthias Brugger We are calling the same code for enable and disable the block in various parts of the driver. Put that code into a new function to reduce code duplication. Signed-off-by: Matthias Brugger Acked-by: Florian Fainelli --- Changes in v2: - rename function to iproc_rng200_enable_set() - use u32 value instead of uint32_t drivers/char/hw_random/iproc-rng200.c | 35 ++++++++++++--------------- 1 file changed, 16 insertions(+), 19 deletions(-) diff --git a/drivers/char/hw_random/iproc-rng200.c b/drivers/char/hw_random/iproc-rng200.c index 70cd818a0f31..a43743887db1 100644 --- a/drivers/char/hw_random/iproc-rng200.c +++ b/drivers/char/hw_random/iproc-rng200.c @@ -53,14 +53,24 @@ struct iproc_rng200_dev { #define to_rng_priv(rng) container_of(rng, struct iproc_rng200_dev, rng) -static void iproc_rng200_restart(void __iomem *rng_base) +static void iproc_rng200_enable_set(void __iomem *rng_base, bool enable) { - uint32_t val; + u32 val; - /* Disable RBG */ val = ioread32(rng_base + RNG_CTRL_OFFSET); val &= ~RNG_CTRL_RNG_RBGEN_MASK; + + if (enable) + val |= RNG_CTRL_RNG_RBGEN_ENABLE; + iowrite32(val, rng_base + RNG_CTRL_OFFSET); +} + +static void iproc_rng200_restart(void __iomem *rng_base) +{ + uint32_t val; + + iproc_rng200_enable_set(rng_base, false); /* Clear all interrupt status */ iowrite32(0xFFFFFFFFUL, rng_base + RNG_INT_STATUS_OFFSET); @@ -82,11 +92,7 @@ static void iproc_rng200_restart(void __iomem *rng_base) val &= ~RBG_SOFT_RESET; iowrite32(val, rng_base + RBG_SOFT_RESET_OFFSET); - /* Enable RBG */ - val = ioread32(rng_base + RNG_CTRL_OFFSET); - val &= ~RNG_CTRL_RNG_RBGEN_MASK; - val |= RNG_CTRL_RNG_RBGEN_ENABLE; - iowrite32(val, rng_base + RNG_CTRL_OFFSET); + iproc_rng200_enable_set(rng_base, true); } static int iproc_rng200_read(struct hwrng *rng, void *buf, size_t max, @@ -153,13 +159,8 @@ static int iproc_rng200_read(struct hwrng *rng, void *buf, size_t max, static int iproc_rng200_init(struct hwrng *rng) { struct iproc_rng200_dev *priv = to_rng_priv(rng); - uint32_t val; - /* Setup RNG. */ - val = ioread32(priv->base + RNG_CTRL_OFFSET); - val &= ~RNG_CTRL_RNG_RBGEN_MASK; - val |= RNG_CTRL_RNG_RBGEN_ENABLE; - iowrite32(val, priv->base + RNG_CTRL_OFFSET); + iproc_rng200_enable_set(priv->base, true); return 0; } @@ -167,12 +168,8 @@ static int iproc_rng200_init(struct hwrng *rng) static void iproc_rng200_cleanup(struct hwrng *rng) { struct iproc_rng200_dev *priv = to_rng_priv(rng); - uint32_t val; - /* Disable RNG hardware */ - val = ioread32(priv->base + RNG_CTRL_OFFSET); - val &= ~RNG_CTRL_RNG_RBGEN_MASK; - iowrite32(val, priv->base + RNG_CTRL_OFFSET); + iproc_rng200_enable_set(priv->base, false); } static int iproc_rng200_probe(struct platform_device *pdev)