From patchwork Tue Nov 30 15:41:25 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 517253 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EB58AC4332F for ; Tue, 30 Nov 2021 15:42:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242790AbhK3Ppj (ORCPT ); Tue, 30 Nov 2021 10:45:39 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44870 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239235AbhK3Poz (ORCPT ); Tue, 30 Nov 2021 10:44:55 -0500 Received: from mail-wr1-x435.google.com (mail-wr1-x435.google.com [IPv6:2a00:1450:4864:20::435]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 29352C061756 for ; Tue, 30 Nov 2021 07:41:36 -0800 (PST) Received: by mail-wr1-x435.google.com with SMTP id u1so45322571wru.13 for ; Tue, 30 Nov 2021 07:41:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=2GWUpkiuXSzN66GVjCDh6suML+iAta4LGHtIvVqjGEk=; b=PJzVzAJyxffNnedFEdvo481yX7NGXk4byfDTk9Z+gAKucSrVtPDOmma+Zq16xS4zPL /oLFiqmI1ZQ3+lfq9LpkGTH1V1WqqwvFN1V5Y320M+foXAXjllcA8CRcZlfGsnH4Llox 8BaOyYiRVwdMGUN58XJ6nWjhieOO0LmXhG0xcyXvoGP1Xhz65XUfClslBQ8mHGZmdxku jKAH5npL9jWZDUW0Jpl7Y5geb9YHprVMnDMV13mYlpW0/F87QzP23ZDDbnmOjS7AeDsE IrKFJYoXlRjd6AIFWYie7vFBZfOTsm3KpIFBFtL16epNToVpCGKz/w3m3eVw+79SxWqY F3yQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=2GWUpkiuXSzN66GVjCDh6suML+iAta4LGHtIvVqjGEk=; b=ENOmUeOw15z+fqQEg7v1RRe2MYE96ySGo71hwQ3zc78w4rwYdcEsHMKrQR4nAd1Sva OV0vHQbO8GJALEHhojqoAZaSc/6fRqvv6GPRImLF29lwqPvt9RdAe4RTFfV7DHSfrm1Q r8errW7YI2vi+sLHaIry3Y1/cVlYx/ZObROx8OOupkwkiP7LAXeFor1VDHKlvaLZQUIr WfB5irYQ+L9GaJBDxCicx7agTIKVTF/LHCm1T34N9C4mK+8yt9rwsyoj7JLEXLGI/pkg uyg26eA29GB5ADwBWCUOMFuHxfWlNuNl+juKNPE0nzhcnmNzGEG7y3iCbUcRRheZUVgq t5hw== X-Gm-Message-State: AOAM530u1U5dX1tVIB7jL7TmTwjqGhS12ivBFP3VVgZhyplCmeRgrQju EDp/ixzTj3Kf8oZRIkCn2fQfXtXHPj1UTkbk X-Google-Smtp-Source: ABdhPJz0VsHHfilKNFFewqQ0dSxoK0Rdda6+4+w0X/nSuuXalMZ/KZ7xP+oj2cH5v0NA84jqI1U4Jg== X-Received: by 2002:adf:ce0e:: with SMTP id p14mr40866287wrn.423.1638286894783; Tue, 30 Nov 2021 07:41:34 -0800 (PST) Received: from debian-brgl.home ([2a01:cb1d:334:ac00:7d50:ff5:f5c1:e225]) by smtp.gmail.com with ESMTPSA id l2sm2962792wmq.42.2021.11.30.07.41.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 30 Nov 2021 07:41:34 -0800 (PST) From: Bartosz Golaszewski To: Kent Gibson , Linus Walleij , Andy Shevchenko , Shuah Khan , Geert Uytterhoeven Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Bartosz Golaszewski Subject: [PATCH v11 4/6] selftests: gpio: provide a helper for reading chip info Date: Tue, 30 Nov 2021 16:41:25 +0100 Message-Id: <20211130154127.12272-5-brgl@bgdev.pl> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20211130154127.12272-1-brgl@bgdev.pl> References: <20211130154127.12272-1-brgl@bgdev.pl> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org 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 d7b312b44a62..a40b818c394e 100644 --- a/tools/testing/selftests/gpio/Makefile +++ b/tools/testing/selftests/gpio/Makefile @@ -2,7 +2,7 @@ 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 CFLAGS += -O2 -g -Wall -I../../../../usr/include/ 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..8f2d2e23e9f6 --- /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; +}