/*
 * lsgpio - example on how to list the GPIO lines on a system
 *
 * Copyright (C) 2015 Linus Walleij
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * Usage:
 *	lsgpio <-n device-name>
 */

#include <unistd.h>
#include <stdlib.h>
#include <stdbool.h>
#include <stdio.h>
#include <dirent.h>
#include <errno.h>
#include <string.h>
#include <poll.h>
#include <fcntl.h>
#include <getopt.h>
#include <sys/ioctl.h>
#include <linux/gpio.h>

#include "gpio-utils.h"

struct gpio_flag {
	char *name;
	unsigned long mask;
};

struct gpio_flag flagnames[] = {
	{
		.name = "kernel",
		.mask = GPIOLINE_FLAG_KERNEL,
	},
	{
		.name = "output",
		.mask = GPIOLINE_FLAG_IS_OUT,
	},
	{
		.name = "active-low",
		.mask = GPIOLINE_FLAG_ACTIVE_LOW,
	},
	{
		.name = "open-drain",
		.mask = GPIOLINE_FLAG_OPEN_DRAIN,
	},
	{
		.name = "open-source",
		.mask = GPIOLINE_FLAG_OPEN_SOURCE,
	},
};

void print_flags(unsigned long flags)
{
	int i;
	int printed = 0;

	for (i = 0; i < ARRAY_SIZE(flagnames); i++) {
		if (flags & flagnames[i].mask) {
			if (printed)
				fprintf(stdout, " ");
			fprintf(stdout, "%s", flagnames[i].name);
			printed++;
		}
	}
}

int list_device(const char *device_name)
{
	struct gpiochip_info cinfo;
	char *chrdev_name;
	int fd;
	int ret;
	int i;

	ret = asprintf(&chrdev_name, "/dev/%s", device_name);
	if (ret < 0)
		return -ENOMEM;

	fd = open(chrdev_name, 0);
	if (fd == -1) {
		ret = -errno;
		fprintf(stderr, "Failed to open %s\n", chrdev_name);
		goto exit_close_error;
	}

	/* Inspect this GPIO chip */
	ret = ioctl(fd, GPIO_GET_CHIPINFO_IOCTL, &cinfo);
	if (ret == -1) {
		ret = -errno;
		perror("Failed to issue CHIPINFO IOCTL\n");
		goto exit_close_error;
	}
	fprintf(stdout, "GPIO chip: %s, \"%s\", %u GPIO lines\n",
		cinfo.name, cinfo.label, cinfo.lines);

	/* Loop over the lines and print info */
	for (i = 0; i < cinfo.lines; i++) {
		struct gpioline_info linfo;

		memset(&linfo, 0, sizeof(linfo));
		linfo.line_offset = i;

		ret = ioctl(fd, GPIO_GET_LINEINFO_IOCTL, &linfo);
		if (ret == -1) {
			ret = -errno;
			perror("Failed to issue LINEINFO IOCTL\n");
			goto exit_close_error;
		}
		fprintf(stdout, "\tline %2d:", linfo.line_offset);
		if (linfo.name[0])
			fprintf(stdout, " \"%s\"", linfo.name);
		else
			fprintf(stdout, " unnamed");
		if (linfo.consumer[0])
			fprintf(stdout, " \"%s\"", linfo.consumer);
		else
			fprintf(stdout, " unused");
		if (linfo.flags) {
			fprintf(stdout, " [");
			print_flags(linfo.flags);
			fprintf(stdout, "]");
		}
		fprintf(stdout, "\n");

	}

exit_close_error:
	if (close(fd) == -1)
		perror("Failed to close GPIO character device file");
	free(chrdev_name);
	return ret;
}

void print_usage(void)
{
	fprintf(stderr, "Usage: lsgpio [options]...\n"
		"List GPIO chips, lines and states\n"
		"  -n <name>  List GPIOs on a named device\n"
		"  -?         This helptext\n"
	);
}

int main(int argc, char **argv)
{
	const char *device_name = NULL;
	int ret;
	int c;

	while ((c = getopt(argc, argv, "n:")) != -1) {
		switch (c) {
		case 'n':
			device_name = optarg;
			break;
		case '?':
			print_usage();
			return -1;
		}
	}

	if (device_name)
		ret = list_device(device_name);
	else {
		const struct dirent *ent;
		DIR *dp;

		/* List all GPIO devices one at a time */
		dp = opendir("/dev");
		if (!dp) {
			ret = -errno;
			goto error_out;
		}

		ret = -ENOENT;
		while (ent = readdir(dp), ent) {
			if (check_prefix(ent->d_name, "gpiochip")) {
				ret = list_device(ent->d_name);
				if (ret)
					break;
			}
		}

		ret = 0;
		if (closedir(dp) == -1) {
			perror("scanning devices: Failed to close directory");
			ret = -errno;
		}
	}
error_out:
	return ret;
}
</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Nicolae Rosia &lt;Nicolae_Rosia@mentor.com&gt;</td><td class='right'>2016-11-12 14:42:14 +0200</td></tr>
<tr><th>committer</th><td>Mark Brown &lt;broonie@kernel.org&gt;</td><td class='right'>2016-11-16 18:03:39 +0000</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/tipc/Kconfig?id=dab780a3b489b038a47d8fbbc49c33aae1e7a682'>dab780a3b489b038a47d8fbbc49c33aae1e7a682</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/tipc/Kconfig?id=dab780a3b489b038a47d8fbbc49c33aae1e7a682'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=dab780a3b489b038a47d8fbbc49c33aae1e7a682'>c9599a6970c187f95f7875d2a3e948f05cef1e45</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/tipc/Kconfig?id=dab780a3b489b038a47d8fbbc49c33aae1e7a682'>net/tipc/Kconfig</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/tipc/Kconfig?id=1001354ca34179f3db924eb66672442a173147dc'>1001354ca34179f3db924eb66672442a173147dc</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/tipc/Kconfig?id=dab780a3b489b038a47d8fbbc49c33aae1e7a682&amp;id2=1001354ca34179f3db924eb66672442a173147dc'>diff</a>)</td></tr></table>
<div class='commit-subject'>regulator: twl-regulator: rework fixed regulator definition</div><div class='commit-msg'>TWL603X and TWL4030 are different and have different code logic.
Rework the regulator definition method so we can split the file
easily in twl4030 and twl6030.

Signed-off-by: Nicolae Rosia &lt;Nicolae_Rosia@mentor.com&gt;
Signed-off-by: Mark Brown &lt;broonie@kernel.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=dab780a3b489b038a47d8fbbc49c33aae1e7a682'>Diffstat</a> (limited to 'net/tipc/Kconfig')</div><table summary='diffstat' class='diffstat'>