From patchwork Tue Mar 9 20:59:19 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 396319 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, 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 40FC5C4332E for ; Tue, 9 Mar 2021 21:00:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 115B765243 for ; Tue, 9 Mar 2021 21:00:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232066AbhCIVAO (ORCPT ); Tue, 9 Mar 2021 16:00:14 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58868 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231987AbhCIU7n (ORCPT ); Tue, 9 Mar 2021 15:59:43 -0500 Received: from mail-wr1-x431.google.com (mail-wr1-x431.google.com [IPv6:2a00:1450:4864:20::431]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1640BC061760 for ; Tue, 9 Mar 2021 12:59:43 -0800 (PST) Received: by mail-wr1-x431.google.com with SMTP id j2so18496108wrx.9 for ; Tue, 09 Mar 2021 12:59:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=aInBliwrC9dHKGFsbWV5Kx8fY6sxq6tzoBmO7q92930=; b=0t3vbRNOURneKM+YkS2XL/m4zU6QQ0/R+vQ7F+eA9LVEOm6aEnZNKyveqqdi68ApLQ sg04Es/4wqhq0NIPXQQEphc/tWypiawmtzsj722pFREUTPgsHXRwLR/KtPnOJ2q+Zr3O cEnFQggTdRjezojuRXWlGIPHguOhoHF11heRwDrUwNA37OA9BTnL9ct12upl0ScprREZ FiFMoh3rw49W6LJCAuo0TRE0dJ/Sqma0RAUgCeAothFHTzCdayJgJ+W+so9CJgeT0mh7 Lli5WhefhYeN4ba1PFx1QXY2yuRx+GkyKe3SFMzP8EVymV2mAELPuq7B+JVB8z3DtM1W xM0g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=aInBliwrC9dHKGFsbWV5Kx8fY6sxq6tzoBmO7q92930=; b=ivIG/k3TJ59V+m95jpR36lSslY/tR417encoUlsLAUO1NcGMwHsUPZMtaQ/hOiBVYr wxcQe7XYj2QQo7imGtiwynXjgODx+Z7WiS5kmLgNXJzhq1vOFqJl6+meJbUwZk2RfWv0 dctQoTpXwz2OKZmMkWxDMmtsHZL0eY8FuOFgBVimVNdyRtyWnqkcvxxFkMJvDoVWwGY+ gk+CtU7T0lMBSOU2yEWvrYNgoJmNLSWBwZE7XmoR4PCLZQS3n3jkHeLSPjbBuZyHUcXJ YBVfUnshGO18VPYXw8D7FnlSWS8bdpvHftb6rii7ayCw753JaTY5O7C48wPCuvxXLxQx 0fTg== X-Gm-Message-State: AOAM531P/Zjpfvmch5QWUJNsHkenw1IskHzqwtDm8eLZ5D60sztKDyTc Mx0Wle3Z9mmPvqb+pQo1BFkNlA== X-Google-Smtp-Source: ABdhPJy3eJx0O6InmykcpD6HpqyDGHtJ8snG8xx7j1xfnSJAbfj9WMTKvwJZtB+KqtPAtB1UuN8BJg== X-Received: by 2002:a5d:56d0:: with SMTP id m16mr29969616wrw.355.1615323581902; Tue, 09 Mar 2021 12:59:41 -0800 (PST) Received: from debian-brgl.home (amarseille-656-1-4-167.w90-8.abo.wanadoo.fr. [90.8.158.167]) by smtp.gmail.com with ESMTPSA id j6sm5501305wmq.16.2021.03.09.12.59.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 09 Mar 2021 12:59:41 -0800 (PST) From: Bartosz Golaszewski To: Joel Becker , Christoph Hellwig , Shuah Khan , Linus Walleij , Andy Shevchenko , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , Geert Uytterhoeven , Kent Gibson , Jonathan Corbet , Greg Kroah-Hartman Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, Bartosz Golaszewski Subject: [PATCH v3 09/11] selftests: gpio: provide a helper for reading chip info Date: Tue, 9 Mar 2021 21:59:19 +0100 Message-Id: <20210309205921.15992-10-brgl@bgdev.pl> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210309205921.15992-1-brgl@bgdev.pl> References: <20210309205921.15992-1-brgl@bgdev.pl> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org From: Bartosz Golaszewski Add a simple program that allows to retrieve chip properties from the GPIO character device. This will be used in gpio-sim selftests. Signed-off-by: Bartosz Golaszewski --- tools/testing/selftests/gpio/.gitignore | 1 + tools/testing/selftests/gpio/Makefile | 2 +- tools/testing/selftests/gpio/gpio-chip-info.c | 57 +++++++++++++++++++ 3 files changed, 59 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/gpio/gpio-chip-info.c diff --git a/tools/testing/selftests/gpio/.gitignore b/tools/testing/selftests/gpio/.gitignore index a4969f7ee020..4ea4f58dab1a 100644 --- a/tools/testing/selftests/gpio/.gitignore +++ b/tools/testing/selftests/gpio/.gitignore @@ -1,2 +1,3 @@ # SPDX-License-Identifier: GPL-2.0-only gpio-mockup-cdev +gpio-chip-info diff --git a/tools/testing/selftests/gpio/Makefile b/tools/testing/selftests/gpio/Makefile index 39f2bbe8dd3d..84b48547f94c 100644 --- a/tools/testing/selftests/gpio/Makefile +++ b/tools/testing/selftests/gpio/Makefile @@ -2,6 +2,6 @@ TEST_PROGS := gpio-mockup.sh TEST_FILES := gpio-mockup-sysfs.sh -TEST_GEN_PROGS_EXTENDED := gpio-mockup-cdev +TEST_GEN_PROGS_EXTENDED := gpio-mockup-cdev gpio-chip-info include ../lib.mk diff --git a/tools/testing/selftests/gpio/gpio-chip-info.c b/tools/testing/selftests/gpio/gpio-chip-info.c new file mode 100644 index 000000000000..4d26fa7c254a --- /dev/null +++ b/tools/testing/selftests/gpio/gpio-chip-info.c @@ -0,0 +1,57 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * GPIO character device helper for reading chip information. + * + * Copyright (C) 2021 Bartosz Golaszewski + */ + +#include +#include +#include +#include +#include +#include +#include + +static void print_usage(void) +{ + printf("usage:\n"); + printf(" gpio-chip-info [name|label|num-lines]\n"); +} + +int main(int argc, char **argv) +{ + struct gpiochip_info info; + int fd, ret; + + if (argc !=3) { + print_usage(); + return EXIT_FAILURE; + } + + fd = open(argv[1], O_RDWR); + if (fd < 0) { + perror("unable to open the GPIO chip"); + return EXIT_FAILURE; + } + + memset(&info, 0, sizeof(info)); + ret = ioctl(fd, GPIO_GET_CHIPINFO_IOCTL, &info); + if (ret) { + perror("chip info ioctl failed"); + return EXIT_FAILURE; + } + + if (strcmp(argv[2], "name") == 0) { + printf("%s\n", info.name); + } else if (strcmp(argv[2], "label") == 0) { + printf("%s\n", info.label); + } else if (strcmp(argv[2], "num-lines") == 0) { + printf("%u\n", info.lines); + } else { + fprintf(stderr, "unknown command: %s\n", argv[2]); + return EXIT_FAILURE; + } + + return EXIT_SUCCESS; +}