From: Bartosz Golaszewski <brgl@bgdev.pl>
To: "Joel Becker" <jlbec@evilplan.org>,
"Christoph Hellwig" <hch@lst.de>, "Shuah Khan" <shuah@kernel.org>,
"Linus Walleij" <linus.walleij@linaro.org>,
"Andy Shevchenko" <andriy.shevchenko@linux.intel.com>,
"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
"Geert Uytterhoeven" <geert@linux-m68k.org>,
"Kent Gibson" <warthog618@gmail.com>,
"Jonathan Corbet" <corbet@lwn.net>
Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-doc@vger.kernel.org,
Bartosz Golaszewski <bgolaszewski@baylibre.com>
Subject: [PATCH v2 11/12] selftests: gpio: add a helper for reading GPIO line names
Date: Thu, 4 Mar 2021 11:24:51 +0100 [thread overview]
Message-ID: <20210304102452.21726-12-brgl@bgdev.pl> (raw)
In-Reply-To: <20210304102452.21726-1-brgl@bgdev.pl>
From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Add a simple program that allows to read GPIO line names from the
character device. This will be used in gpio-sim selftests.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
tools/testing/selftests/gpio/.gitignore | 1 +
tools/testing/selftests/gpio/Makefile | 2 +-
tools/testing/selftests/gpio/gpio-line-name.c | 55 +++++++++++++++++++
3 files changed, 57 insertions(+), 1 deletion(-)
create mode 100644 tools/testing/selftests/gpio/gpio-line-name.c
diff --git a/tools/testing/selftests/gpio/.gitignore b/tools/testing/selftests/gpio/.gitignore
index 4ea4f58dab1a..ededb077a3a6 100644
--- a/tools/testing/selftests/gpio/.gitignore
+++ b/tools/testing/selftests/gpio/.gitignore
@@ -1,3 +1,4 @@
# SPDX-License-Identifier: GPL-2.0-only
gpio-mockup-cdev
gpio-chip-info
+gpio-line-name
diff --git a/tools/testing/selftests/gpio/Makefile b/tools/testing/selftests/gpio/Makefile
index 84b48547f94c..d7d8f1985d99 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 gpio-chip-info
+TEST_GEN_PROGS_EXTENDED := gpio-mockup-cdev gpio-chip-info gpio-line-name
include ../lib.mk
diff --git a/tools/testing/selftests/gpio/gpio-line-name.c b/tools/testing/selftests/gpio/gpio-line-name.c
new file mode 100644
index 000000000000..a52e75bc37ba
--- /dev/null
+++ b/tools/testing/selftests/gpio/gpio-line-name.c
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * GPIO character device helper for reading line names.
+ *
+ * Copyright (C) 2021 Bartosz Golaszewski <bgolaszewski@baylibre.com>
+ */
+
+#include <fcntl.h>
+#include <linux/gpio.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+
+static void print_usage(void)
+{
+ printf("usage:\n");
+ printf(" gpio-line-name <chip path> <line offset>\n");
+}
+
+int main(int argc, char **argv)
+{
+ struct gpio_v2_line_info info;
+ int fd, ret;
+ char *endp;
+
+ 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));
+ info.offset = strtoul(argv[2], &endp, 10);
+ if (*endp != '\0') {
+ print_usage();
+ return EXIT_FAILURE;
+ }
+
+ ret = ioctl(fd, GPIO_V2_GET_LINEINFO_IOCTL, &info);
+ if (ret) {
+ perror("line info ioctl failed");
+ return EXIT_FAILURE;
+ }
+
+ printf("%s\n", info.name);
+
+ return EXIT_SUCCESS;
+}
--
2.29.1
next prev parent reply other threads:[~2021-03-04 10:32 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-04 10:24 [PATCH v2 00/12] gpio: implement the configfs testing module Bartosz Golaszewski
2021-03-04 10:24 ` [PATCH v2 01/12] configfs: increase the item name length Bartosz Golaszewski
2021-03-04 10:24 ` [PATCH v2 02/12] configfs: use (1UL << bit) for internal flags Bartosz Golaszewski
2021-03-04 10:24 ` [PATCH v2 03/12] configfs: implement committable items Bartosz Golaszewski
2021-03-04 10:24 ` [PATCH v2 04/12] samples: configfs: add a committable group Bartosz Golaszewski
2021-03-04 10:24 ` [PATCH v2 05/12] lib: bitmap: remove the 'extern' keyword from function declarations Bartosz Golaszewski
2021-03-04 12:58 ` Andy Shevchenko
2021-03-09 14:44 ` Bartosz Golaszewski
2021-03-04 10:24 ` [PATCH v2 06/12] lib: bitmap: order includes alphabetically Bartosz Golaszewski
2021-03-04 12:59 ` Andy Shevchenko
2021-03-04 10:24 ` [PATCH v2 07/12] lib: bitmap: provide devm_bitmap_alloc() and devm_bitmap_zalloc() Bartosz Golaszewski
2021-03-04 13:01 ` Andy Shevchenko
2021-03-04 10:24 ` [PATCH v2 08/12] drivers: export device_is_bound() Bartosz Golaszewski
2021-03-05 8:18 ` Geert Uytterhoeven
2021-03-05 8:33 ` Greg KH
2021-03-05 8:45 ` Bartosz Golaszewski
2021-03-05 8:55 ` Greg KH
2021-03-05 9:16 ` Bartosz Golaszewski
2021-03-05 10:24 ` Greg KH
2021-03-05 10:58 ` Bartosz Golaszewski
2021-03-05 11:27 ` Greg KH
2021-03-05 14:20 ` Bartosz Golaszewski
2021-03-05 15:01 ` Greg KH
2021-03-08 10:58 ` Bartosz Golaszewski
2021-03-04 10:24 ` [PATCH v2 09/12] gpio: sim: new testing module Bartosz Golaszewski
2021-03-04 13:15 ` Andy Shevchenko
2021-03-04 20:15 ` Bartosz Golaszewski
2021-03-05 10:15 ` Andy Shevchenko
2021-03-08 14:23 ` Bartosz Golaszewski
2021-03-08 15:04 ` Andy Shevchenko
2021-03-08 15:13 ` Bartosz Golaszewski
2021-03-08 15:32 ` Andy Shevchenko
2021-03-08 15:37 ` Bartosz Golaszewski
2021-03-08 16:37 ` Andy Shevchenko
2021-03-04 10:24 ` [PATCH v2 10/12] selftests: gpio: provide a helper for reading chip info Bartosz Golaszewski
2021-03-04 10:24 ` Bartosz Golaszewski [this message]
2021-03-04 10:24 ` [PATCH v2 12/12] selftests: gpio: add test cases for gpio-sim Bartosz Golaszewski
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