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=-9.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 63243C433E0 for ; Thu, 28 May 2020 07:20:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3E605207BC for ; Thu, 28 May 2020 07:20:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="nPbOvky+" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726440AbgE1HU6 (ORCPT ); Thu, 28 May 2020 03:20:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60190 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725601AbgE1HU5 (ORCPT ); Thu, 28 May 2020 03:20:57 -0400 Received: from mail-pg1-x544.google.com (mail-pg1-x544.google.com [IPv6:2607:f8b0:4864:20::544]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 21704C05BD1E; Thu, 28 May 2020 00:20:57 -0700 (PDT) Received: by mail-pg1-x544.google.com with SMTP id w20so7978453pga.6; Thu, 28 May 2020 00:20:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=FiQqSNUhCv6yJ3YkfxLNYN6qXN3BR0Yb2SyZoRmzP9o=; b=nPbOvky+lTrWfAhyXZSq79WgJY+Sx0uCpikjEAUK8tm7a+LHU/tQtS7R/tIB0lKfWA +SxGyA6kH+Om7lfgQg1sR/+zVHyuURBsM/gLDtm+AnLIVrYb7DlEERys4QO+8SryE42X Do3d7MgpOdEDIaRYhZvXtHMydMzonDOJsfgau5bZ0qZo9cCNZrLsR5vK5qPpoWua/L1d Gz0ITQIawcxFx3fdwbS47+0PzBeYlHA8spRBg4vjgfDFBBdLLxtFKQMfRHezjb3O8IlH DbSIQdbxNhHnfTiBVtKHsyh581Oui2o8OqeGmmdG397ZmZLbisoguQHLsYHCGBtUv+Mx ECuQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-transfer-encoding; bh=FiQqSNUhCv6yJ3YkfxLNYN6qXN3BR0Yb2SyZoRmzP9o=; b=Ad1P3kpkqYdywVqy+ES+Ttmtngx8EdLGcFPJBCFK+vATELFfaN/JXZz6aAW8IHSeKI 5legLdFhI3cdaB1K0D6YuYMWjFsUuuB9SoSQxwEGc9QcuusLacce8yil2KYdzVd9m41F EYoSzbAiyEdLY8SqyRUIk2FXsYCvjxbuebVN8nwxubLnvrzehpUM4SaKWUVjZn3y1elv iZ2FBNKcElYSP7IqV+NswuwZfe8Ueio+gvGtDZPVWvr5cJBj/eEW0GwFZTruYLpd8LtP jfCwHPqA0cfMJnGFyWdbpfDTaZi557KhcRCbCmhPQGWf2F5dxrDjnwBhvi2DaVEnnsbw NvkA== X-Gm-Message-State: AOAM530D6xfD2YIFlyFPvMH50PDDD/EEcr6KSQ+ZivOXL+dRS/jWhdj/ K+U6HD/0vuXDyZj4MndWyngfT6AN X-Google-Smtp-Source: ABdhPJwZh49inkphdw7VF1lCcjSzN8VMOGrXayRtyVqk14Ia6EaAWv7FvQUI/sOctKeTyffXk2Cs2w== X-Received: by 2002:a65:6459:: with SMTP id s25mr1605738pgv.329.1590650456209; Thu, 28 May 2020 00:20:56 -0700 (PDT) Received: from localhost.localdomain ([45.124.203.15]) by smtp.gmail.com with ESMTPSA id k2sm4090628pfd.108.2020.05.28.00.20.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 28 May 2020 00:20:55 -0700 (PDT) From: Joel Stanley To: devicetree-compiler@vger.kernel.org, David Gibson Cc: linux-kernel@vger.kernel.org, Stephen Rothwell , Arnd Bergmann Subject: [PATCH v2 1/2] checks: Remove warning for I2C_OWN_SLAVE_ADDRESS Date: Thu, 28 May 2020 16:50:36 +0930 Message-Id: <20200528072037.1402346-2-joel@jms.id.au> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200528072037.1402346-1-joel@jms.id.au> References: <20200528072037.1402346-1-joel@jms.id.au> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org dtc does a sanity check on reg properties that they are within the 10 bit address range for i2c slave addresses. In the case of multi-master buses or devices that act as a slave, the binding may describe an address that the bus will listen on as a device. Do not warn when this flag is set. See Documentation/devicetree/bindings/i2c/i2c.txt. This fixes the following build warnings reported by Stephen and by Arnd: arch/arm/boot/dts/aspeed-bmc-facebook-yosemitev2.dts:126.11-130.4: Warning (i2c_bus_reg): /ahb/apb/bus@1e78a000/i2c-bus@80/ipmb1@10: I2C bus unit address format error, expected "40000010" arch/arm/boot/dts/aspeed-bmc-facebook-yosemitev2.dts:128.3-30: Warning (i2c_bus_reg): /ahb/apb/bus@1e78a000/i2c-bus@80/ipmb1@10:reg: I2C address must be less than 10-bits, got "0x40000010" Reported-by: Stephen Rothwell Reported-by: Arnd Bergmann Signed-off-by: Joel Stanley --- v2: Fix typo --- checks.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/checks.c b/checks.c index a8213c0e13a8..feb1721f2603 100644 --- a/checks.c +++ b/checks.c @@ -1022,6 +1022,8 @@ static void check_i2c_bus_bridge(struct check *c, struct dt_info *dti, struct no } WARNING(i2c_bus_bridge, check_i2c_bus_bridge, NULL, &addr_size_cells); +#define I2C_OWN_SLAVE_ADDRESS (1 << 30) + static void check_i2c_bus_reg(struct check *c, struct dt_info *dti, struct node *node) { struct property *prop; @@ -1044,6 +1046,8 @@ static void check_i2c_bus_reg(struct check *c, struct dt_info *dti, struct node } reg = fdt32_to_cpu(*cells); + /* Ignore I2C_OWN_SLAVE_ADDRESS */ + reg &= ~I2C_OWN_SLAVE_ADDRESS; snprintf(unit_addr, sizeof(unit_addr), "%x", reg); if (!streq(unitname, unit_addr)) FAIL(c, dti, node, "I2C bus unit address format error, expected \"%s\"", @@ -1051,6 +1055,8 @@ static void check_i2c_bus_reg(struct check *c, struct dt_info *dti, struct node for (len = prop->val.len; len > 0; len -= 4) { reg = fdt32_to_cpu(*(cells++)); + /* Ignore I2C_OWN_SLAVE_ADDRESS */ + reg &= ~I2C_OWN_SLAVE_ADDRESS; if (reg > 0x3ff) FAIL_PROP(c, dti, node, prop, "I2C address must be less than 10-bits, got \"0x%x\"", reg); -- 2.26.2