From mboxrd@z Thu Jan 1 00:00:00 1970 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=-3.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,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 65BE7C46470 for ; Wed, 8 Aug 2018 08:07:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EF640216F3 for ; Wed, 8 Aug 2018 08:07:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EF640216F3 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=atomide.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727359AbeHHK0L (ORCPT ); Wed, 8 Aug 2018 06:26:11 -0400 Received: from muru.com ([72.249.23.125]:53024 "EHLO muru.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727288AbeHHKZ5 (ORCPT ); Wed, 8 Aug 2018 06:25:57 -0400 Received: from hillo.muru.com (localhost [127.0.0.1]) by muru.com (Postfix) with ESMTP id 3B7C281CA; Wed, 8 Aug 2018 08:10:57 +0000 (UTC) From: Tony Lindgren To: linux-omap@vger.kernel.org Cc: Dave Gerlach , Faiz Abbas , Greg Kroah-Hartman , Keerthy , Nishanth Menon , Suman Anna , Tero Kristo , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 3/4] bus: ti-sysc: Fix module register ioremap for larger offsets Date: Wed, 8 Aug 2018 01:07:05 -0700 Message-Id: <20180808080706.100389-4-tony@atomide.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180808080706.100389-1-tony@atomide.com> References: <20180808080706.100389-1-tony@atomide.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We can have the interconnect target module control registers pretty much anywhere within the module range. The current code attempts an incomplete optimization of the ioremap size but does it wrong and it only works for registers at the beginning of the module. Let's just use the largest control register to calculate the ioremap size. The ioremapped range is for most part cached anyways so there is no need for size optimization. Let's also update the comments accordingly. Fixes: 0eecc636e5a2 ("bus: ti-sysc: Add minimal TI sysc interconnect target driver") Signed-off-by: Tony Lindgren --- drivers/bus/ti-sysc.c | 29 ++++++++++++++--------------- 1 file changed, 14 insertions(+), 15 deletions(-) diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c --- a/drivers/bus/ti-sysc.c +++ b/drivers/bus/ti-sysc.c @@ -498,28 +498,27 @@ static int sysc_check_registers(struct sysc *ddata) /** * syc_ioremap - ioremap register space for the interconnect target module - * @ddata: deviec driver data + * @ddata: device driver data * * Note that the interconnect target module registers can be anywhere - * within the first child device address space. For example, SGX has - * them at offset 0x1fc00 in the 32MB module address space. We just - * what we need around the interconnect target module registers. + * within the interconnect target module range. For example, SGX has + * them at offset 0x1fc00 in the 32MB module address space. And cpsw + * has them at offset 0x1200 in the CPSW_WR child. Usually the + * the interconnect target module registers are at the beginning of + * the module range though. */ static int sysc_ioremap(struct sysc *ddata) { - u32 size = 0; - - if (ddata->offsets[SYSC_SYSSTATUS] >= 0) - size = ddata->offsets[SYSC_SYSSTATUS]; - else if (ddata->offsets[SYSC_SYSCONFIG] >= 0) - size = ddata->offsets[SYSC_SYSCONFIG]; - else if (ddata->offsets[SYSC_REVISION] >= 0) - size = ddata->offsets[SYSC_REVISION]; - else + u32 size; + + size = max3(ddata->offsets[SYSC_REVISION], + ddata->offsets[SYSC_SYSCONFIG], + ddata->offsets[SYSC_SYSSTATUS]); + + if (size < 0) return -EINVAL; - size &= 0xfff00; - size += SZ_256; + size += 4; ddata->module_va = devm_ioremap(ddata->dev, ddata->module_pa, -- 2.17.1