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authorBamvor Jian Zhang <bamvor.zhangjian@linaro.org>2016-10-14 04:48:26 +0200
committerLinus Walleij <linus.walleij@linaro.org>2016-10-24 16:33:11 +0200
commit74100bb9677798eef3d7a7974cd4343265139ed8 (patch)
tree76b8d9952ebb03c3e5f6c7cd6680c9fc4de9db53 /tools/gpio
parenttools/gpio: add gpio basic opereations (diff)
downloadlinux-74100bb9677798eef3d7a7974cd4343265139ed8.tar.xz
linux-74100bb9677798eef3d7a7974cd4343265139ed8.zip
tools/gpio: re-work gpio hammer with gpio operations
Signed-off-by: Bamvor Jian Zhang <bamvor.zhangjian@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'tools/gpio')
-rw-r--r--tools/gpio/gpio-hammer.c67
1 files changed, 17 insertions, 50 deletions
diff --git a/tools/gpio/gpio-hammer.c b/tools/gpio/gpio-hammer.c
index 37b3f141053d..f1eab587dfea 100644
--- a/tools/gpio/gpio-hammer.c
+++ b/tools/gpio/gpio-hammer.c
@@ -23,54 +23,31 @@
#include <getopt.h>
#include <sys/ioctl.h>
#include <linux/gpio.h>
+#include "gpio-utils.h"
int hammer_device(const char *device_name, unsigned int *lines, int nlines,
unsigned int loops)
{
- struct gpiohandle_request req;
struct gpiohandle_data data;
- char *chrdev_name;
char swirr[] = "-\\|/";
int fd;
int ret;
int i, j;
unsigned int iteration = 0;
- ret = asprintf(&chrdev_name, "/dev/%s", device_name);
+ memset(&data.values, 0, sizeof(data.values));
+ ret = gpiotools_request_linehandle(device_name, lines, nlines,
+ GPIOHANDLE_REQUEST_OUTPUT, &data,
+ "gpio-hammler");
if (ret < 0)
- return -ENOMEM;
+ goto exit_error;
+ else
+ fd = ret;
- fd = open(chrdev_name, 0);
- if (fd == -1) {
- ret = -errno;
- fprintf(stderr, "Failed to open %s\n", chrdev_name);
- goto exit_close_error;
- }
-
- /* Request lines as output */
- for (i = 0; i < nlines; i++)
- req.lineoffsets[i] = lines[i];
- req.flags = GPIOHANDLE_REQUEST_OUTPUT; /* Request as output */
- strcpy(req.consumer_label, "gpio-hammer");
- req.lines = nlines;
- ret = ioctl(fd, GPIO_GET_LINEHANDLE_IOCTL, &req);
- if (ret == -1) {
- ret = -errno;
- fprintf(stderr, "Failed to issue GET LINEHANDLE "
- "IOCTL (%d)\n",
- ret);
+ ret = gpiotools_get_values(fd, &data);
+ if (ret < 0)
goto exit_close_error;
- }
- /* Read initial states */
- ret = ioctl(req.fd, GPIOHANDLE_GET_LINE_VALUES_IOCTL, &data);
- if (ret == -1) {
- ret = -errno;
- fprintf(stderr, "Failed to issue GPIOHANDLE GET LINE "
- "VALUES IOCTL (%d)\n",
- ret);
- goto exit_close_error;
- }
fprintf(stdout, "Hammer lines [");
for (i = 0; i < nlines; i++) {
fprintf(stdout, "%d", lines[i]);
@@ -92,23 +69,14 @@ int hammer_device(const char *device_name, unsigned int *lines, int nlines,
for (i = 0; i < nlines; i++)
data.values[i] = !data.values[i];
- ret = ioctl(req.fd, GPIOHANDLE_SET_LINE_VALUES_IOCTL, &data);
- if (ret == -1) {
- ret = -errno;
- fprintf(stderr, "Failed to issue GPIOHANDLE SET LINE "
- "VALUES IOCTL (%d)\n",
- ret);
+ ret = gpiotools_set_values(fd, &data);
+ if (ret < 0)
goto exit_close_error;
- }
+
/* Re-read values to get status */
- ret = ioctl(req.fd, GPIOHANDLE_GET_LINE_VALUES_IOCTL, &data);
- if (ret == -1) {
- ret = -errno;
- fprintf(stderr, "Failed to issue GPIOHANDLE GET LINE "
- "VALUES IOCTL (%d)\n",
- ret);
+ ret = gpiotools_get_values(fd, &data);
+ if (ret < 0)
goto exit_close_error;
- }
fprintf(stdout, "[%c] ", swirr[j]);
j++;
@@ -132,9 +100,8 @@ int hammer_device(const char *device_name, unsigned int *lines, int nlines,
ret = 0;
exit_close_error:
- if (close(fd) == -1)
- perror("Failed to close GPIO character device file");
- free(chrdev_name);
+ gpiotools_release_linehandle(fd);
+exit_error:
return ret;
}