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gpioctl: implement support for "gpioctl gpioN list". Like pcictl(8).

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For drivers that name their pins, this can be used to determine how the
logical pins are mapped to physical pins. Example from sunxigpio(4):

# gpioctl gpio0 list
0: PA0
1: PA1
2: PA2
...
This commit is contained in:
tnn 2019-10-20 09:41:53 +00:00
parent 9a3d6b2058
commit bbae070d2b
2 changed files with 37 additions and 4 deletions
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12
usr.sbin/gpioctl/gpioctl.8
View File

@ -1,4 +1,4 @@
.\" $NetBSD: gpioctl.8,v 1.22 2019/02/13 11:40:41 wiz Exp $
.\" $NetBSD: gpioctl.8,v 1.23 2019/10/20 09:41:53 tnn Exp $
.\"
.\" Copyright (c) 2009, 2010, 2011, 2013 Marc Balmer <marc@msys.ch>
.\" Copyright (c) 2004 Alexander Yurchenko <grange@openbsd.org>
@ -15,7 +15,7 @@
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
.Dd February 12, 2019
.Dd October 20, 2019
.Dt GPIOCTL 8
.Os
.Sh NAME
@ -55,6 +55,10 @@
.Ar device
.Ar pin
.Cm unset
.Nm gpioctl
.Op Fl q
.Ar device
.Ar list
.Sh DESCRIPTION
The
.Nm
@ -203,6 +207,10 @@ Configure pin 5 as output and name it error_led:
Toggle the error_led:
.Pp
.Dl # gpioctl gpio0 error_led 2
.Pp
Enumerate all pins and display their symbolic names:
.Pp
.Dl # gpioctl gpio0 list
.Sh SEE ALSO
.Xr gpio 4 ,
.Xr drvctl 8

29
usr.sbin/gpioctl/gpioctl.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: gpioctl.c,v 1.26 2019/01/27 02:08:51 pgoyette Exp $ */
/* $NetBSD: gpioctl.c,v 1.27 2019/10/20 09:41:53 tnn Exp $ */
/*
* Copyright (c) 2008, 2010, 2011, 2013 Marc Balmer <mbalmer@NetBSD.org>
@ -17,7 +17,7 @@
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/cdefs.h>
__RCSID("$NetBSD: gpioctl.c,v 1.26 2019/01/27 02:08:51 pgoyette Exp $");
__RCSID("$NetBSD: gpioctl.c,v 1.27 2019/10/20 09:41:53 tnn Exp $");
/*
* Program to control GPIO devices.
@ -48,6 +48,7 @@ static void gpioread(int, char *);
static void gpiowrite(int, char *, int);
static void gpioset(int pin, char *name, int flags, char *alias);
static void gpiounset(int pin, char *name);
static void gpiolist(void);
static void devattach(char *, int, uint32_t, uint32_t);
__dead static void usage(void);
@ -160,6 +161,9 @@ main(int argc, char *argv[])
}
devattach(driver, ga_offset, ga_mask, ga_flags);
return EXIT_SUCCESS;
} else if (!strcmp(argv[1], "list")) {
gpiolist();
return EXIT_SUCCESS;
} else {
char *nm = NULL;
@ -344,6 +348,26 @@ gpiounset(int pin, char *name)
err(EXIT_FAILURE, "GPIOUNSET");
}
static void
gpiolist()
{
struct gpio_info info;
struct gpio_req req;
int i;
if (ioctl(devfd, GPIOINFO, &info) == -1)
err(EXIT_FAILURE, "GPIOINFO");
for (i = 0; i < info.gpio_npins; i++) {
memset(&req, 0, sizeof(req));
req.gp_pin = i;
if (ioctl(devfd, GPIOREAD, &req) == -1)
err(EXIT_FAILURE, "GPIOREAD");
if (!quiet)
printf("%d: %s\n", i, req.gp_name);
}
}
static void
devattach(char *dvname, int offset, uint32_t mask, uint32_t flags)
{
@ -372,6 +396,7 @@ usage(void)
fprintf(stderr, " %s [-q] device attach device offset mask "
"[flag]\n",
progname);
fprintf(stderr, " %s [-q] device list\n", progname);
exit(EXIT_FAILURE);
}