From patchwork Wed Sep 7 15:57:40 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Romain Perier X-Patchwork-Id: 9319621 X-Patchwork-Delegate: herbert@gondor.apana.org.au Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id C72536077F for ; Wed, 7 Sep 2016 15:57:58 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B223929363 for ; Wed, 7 Sep 2016 15:57:58 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A6A3829386; Wed, 7 Sep 2016 15:57:58 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4AAAC293E5 for ; Wed, 7 Sep 2016 15:57:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934620AbcIGP54 (ORCPT ); Wed, 7 Sep 2016 11:57:56 -0400 Received: from down.free-electrons.com ([37.187.137.238]:42893 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751304AbcIGP5w (ORCPT ); Wed, 7 Sep 2016 11:57:52 -0400 Received: by mail.free-electrons.com (Postfix, from userid 110) id B025F1B38; Wed, 7 Sep 2016 17:57:49 +0200 (CEST) Received: from latitudeE7470 (LStLambert-657-1-97-87.w90-63.abo.wanadoo.fr [90.63.216.87]) by mail.free-electrons.com (Postfix) with ESMTPSA id 870C612D; Wed, 7 Sep 2016 17:57:49 +0200 (CEST) From: Romain Perier To: dsaxena@plexity.net, mpm@selenic.com, Herbert Xu Cc: Gregory Clement , Thomas Petazzoni , Romain Perier , Nadav Haklai , Omri Itach , Shadi Ammouri , Yahuda Yitschak , Hanna Hawa , Neta Zur Hershkovits , Igal Liberman , Marcin Wojtas , linux-crypto@vger.kernel.org Subject: [PATCH v2 5/8] hwrng: omap - Add support for 128-bit output of data Date: Wed, 7 Sep 2016 17:57:40 +0200 Message-Id: <20160907155743.6403-6-romain.perier@free-electrons.com> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20160907155743.6403-1-romain.perier@free-electrons.com> References: <20160907155743.6403-1-romain.perier@free-electrons.com> Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP So far, this driver only supports up to 64 bits of output data generated by an RNG. Some IP blocks, like the SafeXcel IP-76 supports up to 128 bits of output data. This commits renames registers descriptions OUTPUT_L_REG and OUTPUT_H_REG to OUTPUT_0_REG and OUPUT_1_REG, respectively. It also adds two new values to the enumeration of existing registers: OUTPUT_2_REG and OUTPUT_3_REG. Signed-off-by: Romain Perier --- drivers/char/hw_random/omap-rng.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/drivers/char/hw_random/omap-rng.c b/drivers/char/hw_random/omap-rng.c index b20e8d7..6924da57 100644 --- a/drivers/char/hw_random/omap-rng.c +++ b/drivers/char/hw_random/omap-rng.c @@ -65,8 +65,10 @@ #define OMAP4_RNG_OUTPUT_SIZE 0x8 enum { - RNG_OUTPUT_L_REG = 0, - RNG_OUTPUT_H_REG, + RNG_OUTPUT_0_REG = 0, + RNG_OUTPUT_1_REG, + RNG_OUTPUT_2_REG, + RNG_OUTPUT_3_REG, RNG_STATUS_REG, RNG_INTMASK_REG, RNG_INTACK_REG, @@ -82,7 +84,7 @@ enum { }; static const u16 reg_map_omap2[] = { - [RNG_OUTPUT_L_REG] = 0x0, + [RNG_OUTPUT_0_REG] = 0x0, [RNG_STATUS_REG] = 0x4, [RNG_CONFIG_REG] = 0x28, [RNG_REV_REG] = 0x3c, @@ -90,8 +92,8 @@ static const u16 reg_map_omap2[] = { }; static const u16 reg_map_omap4[] = { - [RNG_OUTPUT_L_REG] = 0x0, - [RNG_OUTPUT_H_REG] = 0x4, + [RNG_OUTPUT_0_REG] = 0x0, + [RNG_OUTPUT_1_REG] = 0x4, [RNG_STATUS_REG] = 0x8, [RNG_INTMASK_REG] = 0xc, [RNG_INTACK_REG] = 0x10, @@ -155,7 +157,7 @@ static int omap_rng_do_read(struct hwrng *rng, void *data, size_t max, if (!priv->pdata->data_present(priv)) return 0; - memcpy_fromio(data, priv->base + priv->pdata->regs[RNG_OUTPUT_L_REG], + memcpy_fromio(data, priv->base + priv->pdata->regs[RNG_OUTPUT_0_REG], priv->pdata->data_size); if (priv->pdata->regs[RNG_INTACK_REG])