[PATCH 6/7] selftests: gpio: port to GPIO uAPI v2

Kent Gibson
2021-01-02T02:31:54Z

Add a port to the GPIO uAPI v2 interface and make it the default.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
---
.../testing/selftests/gpio/gpio-mockup-cdev.c | 75 +++++++++++++++++--
tools/testing/selftests/gpio/gpio-mockup.sh | 11 ++-
2 files changed, 76 insertions(+), 10 deletions(-)

diff --git a/tools/testing/selftests/gpio/gpio-mockup-cdev.c b/tools/testing/selftests/gpio/gpio-mockup-cdev.c
index 3bfd876a8b6a..e8e3d2ec662c 100644
--- a/tools/testing/selftests/gpio/gpio-mockup-cdev.c
+++ b/tools/testing/selftests/gpio/gpio-mockup-cdev.c
@@ -18,6 +18,44 @@

#define CONSUMER "gpio-mockup-cdev"

+static int request_line_v2(int cfd, unsigned int offset,
+ uint64_t flags, unsigned int val)
+{
+ struct gpio_v2_line_request req;
+ int ret;
+
+ memset(&req, 0, sizeof(req));
+ req.num_lines = 1;
+ req.offsets[0] = offset;
+ req.config.flags = flags;
+ strcpy(req.consumer, CONSUMER);
+ if (flags & GPIO_V2_LINE_FLAG_OUTPUT) {
+ req.config.num_attrs = 1;
+ req.config.attrs[0].mask = 1;
+ req.config.attrs[0].attr.id = GPIO_V2_LINE_ATTR_ID_OUTPUT_VALUES;
+ if (val)
+ req.config.attrs[0].attr.values = 1;
+ }
+ ret = ioctl(cfd, GPIO_V2_GET_LINE_IOCTL, &req);
+ if (ret == -1)
+ return -errno;
+ return req.fd;
+}
+
+
+static int get_value_v2(int lfd)
+{
+ struct gpio_v2_line_values vals;
+ int ret;
+
+ memset(&vals, 0, sizeof(vals));
+ vals.mask = 1;
+ ret = ioctl(lfd, GPIO_V2_LINE_GET_VALUES_IOCTL, &vals);
+ if (ret == -1)
+ return -errno;
+ return vals.bits & 0x1;
+}
+
static int request_line_v1(int cfd, unsigned int offset,
uint32_t flags, unsigned int val)
{
@@ -57,6 +95,7 @@ static void usage(char *prog)
printf(" (default is to leave bias unchanged):\n");
printf(" -l: set line active low (default is active high)\n");
printf(" -s: set line value (default is to get line value)\n");
+ printf(" -u: uAPI version to use (default is 2)\n");
exit(-1);
}

@@ -78,29 +117,42 @@ int main(int argc, char *argv[])
{
char *chip;
int opt, ret, cfd, lfd;
- unsigned int offset, val;
+ unsigned int offset, val, abiv;
uint32_t flags_v1;
+ uint64_t flags_v2;

+ abiv = 2;
ret = 0;
flags_v1 = GPIOHANDLE_REQUEST_INPUT;
+ flags_v2 = GPIO_V2_LINE_FLAG_INPUT;

while ((opt = getopt(argc, argv, "lb:s:u:")) != -1) {
switch (opt) {
case 'l':
flags_v1 |= GPIOHANDLE_REQUEST_ACTIVE_LOW;
+ flags_v2 |= GPIO_V2_LINE_FLAG_ACTIVE_LOW;
break;
case 'b':
- if (strcmp("pull-up", optarg) == 0)
+ if (strcmp("pull-up", optarg) == 0) {
flags_v1 |= GPIOHANDLE_REQUEST_BIAS_PULL_UP;
- else if (strcmp("pull-down", optarg) == 0)
+ flags_v2 |= GPIO_V2_LINE_FLAG_BIAS_PULL_UP;
+ } else if (strcmp("pull-down", optarg) == 0) {
flags_v1 |= GPIOHANDLE_REQUEST_BIAS_PULL_DOWN;
- else if (strcmp("disabled", optarg) == 0)
+ flags_v2 |= GPIO_V2_LINE_FLAG_BIAS_PULL_DOWN;
+ } else if (strcmp("disabled", optarg) == 0) {
flags_v1 |= GPIOHANDLE_REQUEST_BIAS_DISABLE;
+ flags_v2 |= GPIO_V2_LINE_FLAG_BIAS_DISABLED;
+ }
break;
case 's':
val = atoi(optarg);
flags_v1 &= ~GPIOHANDLE_REQUEST_INPUT;
flags_v1 |= GPIOHANDLE_REQUEST_OUTPUT;
+ flags_v2 &= ~GPIO_V2_LINE_FLAG_INPUT;
+ flags_v2 |= GPIO_V2_LINE_FLAG_OUTPUT;
+ break;
+ case 'u':
+ abiv = atoi(optarg);
break;
default:
usage(argv[0]);
@@ -119,7 +171,10 @@ int main(int argc, char *argv[])
return -errno;
}

- lfd = request_line_v1(cfd, offset, flags_v1, val);
+ if (abiv == 1)
+ lfd = request_line_v1(cfd, offset, flags_v1, val);
+ else
+ lfd = request_line_v2(cfd, offset, flags_v2, val);

close(cfd);

@@ -128,10 +183,14 @@ int main(int argc, char *argv[])
return lfd;
}

- if (flags_v1 & GPIOHANDLE_REQUEST_OUTPUT)
+ if (flags_v2 & GPIO_V2_LINE_FLAG_OUTPUT) {
wait_signal();
- else
- ret = get_value_v1(lfd);
+ } else {
+ if (abiv == 1)
+ ret = get_value_v1(lfd);
+ else
+ ret = get_value_v2(lfd);
+ }

close(lfd);

diff --git a/tools/testing/selftests/gpio/gpio-mockup.sh b/tools/testing/selftests/gpio/gpio-mockup.sh
index 66eed9b60963..843f829b3dd8 100755
--- a/tools/testing/selftests/gpio/gpio-mockup.sh
+++ b/tools/testing/selftests/gpio/gpio-mockup.sh
@@ -13,6 +13,7 @@ dev_type="cdev"
module="gpio-mockup"
verbose=
random=
+uapi_opt=
active_opt=
bias_opt=
line_set_pid=
@@ -29,6 +30,7 @@ usage()
echo "-r: test random lines as well as fence posts"
echo "-t: interface type:"
echo " cdev (character device ABI) - default"
+ echo " cdev_v1 (deprecated character device ABI)"
echo " sysfs (deprecated SYSFS ABI)"
echo "-v: verbose progress reporting"
exit $ksft_fail
@@ -102,7 +104,8 @@ get_line()
{
release_line

- $BASE/gpio-mockup-cdev $active_opt /dev/$chip $offset > /dev/null 2>&1
+ local cdev_opts=${uapi_opt}${active_opt}
+ $BASE/gpio-mockup-cdev $cdev_opts /dev/$chip $offset > /dev/null 2>&1
echo $?
}

@@ -144,7 +147,7 @@ set_line()
esac
done

- local cdev_opts=${active_opt}
+ local cdev_opts=${uapi_opt}${active_opt}
if [ "$val" ]; then
$BASE/gpio-mockup-cdev $cdev_opts -s$val /dev/$chip $offset 2>&1 >/dev/null &
# failure to set is detected by reading mock and toggling values
@@ -314,6 +317,10 @@ sysfs)
source $BASE/gpio-mockup-sysfs.sh
echo "WARNING: gpio sysfs ABI is deprecated."
;;
+cdev_v1)
+ echo "WARNING: gpio cdev ABI v1 is deprecated."
+ uapi_opt="-u1 "
+ ;;
cdev)
;;
*)
--
2.30.0