[PATCH v2 0/7] selftests: gpio: rework and port to GPIO uAPI v2

[PATCH v2 0/7] selftests: gpio: rework and port to GPIO uAPI v2

[Kent Gibson]

Initially I just wanted to port the selftests to the latest GPIO uAPI,
but on finding that, due to dependency issues, the selftests are not built
for the buildroot environments that I do most of my GPIO testing in, I
decided to take a closer look.

The first patch is essentially a rewrite of the exising test suite.
It uses a simplified abstraction of the uAPI interfaces to allow a common
test suite to test the gpio-mockup using either of the uAPI interfaces.
The simplified cdev interface is implemented in gpio-mockup.sh, with the
actual driving of the uAPI implemented in gpio-mockup-cdev.c.
The simplified sysfs interface replaces gpio-mockup-sysfs.sh and is
loaded over the cdev implementation when selected.

The new tests should also be simpler to extend to cover new mockup
interfaces, such as the one Bart has been working on.

I have dropped support for testing modules other than gpio-mockup from
the command line options, as the tests are very gpio-mockup specific so
I didn't see any calling for it.

I have also tried to emphasise in the test output that the tests are
covering the gpio-mockup itself.  They do perform some implicit testing
of gpiolib and the uAPI interfaces, and so can be useful as smoke tests
for those, but their primary focus is the gpio-mockup.

Patches 2 through 5 do some cleaning up that is now possible with the
new implementation, including enabling building in buildroot environments.
Patch 4 doesn't strictly clean up all the old gpio references that it
could - the gpio was the only Level 1 test, so the Level 1 tests could
potentially be removed, but I was unsure if there may be other
implications to removing a whole test level, or that it may be useful
as a placeholder in case other static LDLIBS tests are added in
the future??

Patch 6 finally gets around to porting the tests to the latest GPIO uAPI.

And Patch 7 updates the config to set the CONFIG_GPIO_CDEV option that
was added in v5.10.

Cheers,
Kent.

Changes v1 -> v2 (all in patch 1 and gpio-mockup.sh unless stated
 otherwise):
 - reorder includes in gpio-mockup-cdev.c
 - a multitude of improvements to gpio-mockup.sh and gpio-mockup-sysfs.sh
   based on Andy's review comments
 - improved cleanup to ensure all child processes are killed on exit
 - added race condition prevention or mitigation including the wait in
   release_line, the retries in assert_mock, the assert_mock in set_mock,
   and the sleep in set_line

Kent Gibson (7):
  selftests: gpio: rework and simplify test implementation
  selftests: gpio: remove obsolete gpio-mockup-chardev.c
  selftests: remove obsolete build restriction for gpio
  selftests: remove obsolete gpio references from kselftest_deps.sh
  tools: gpio: remove uAPI v1 code no longer used by selftests
  selftests: gpio: port to GPIO uAPI v2
  selftests: gpio: add CONFIG_GPIO_CDEV to config

 tools/gpio/gpio-utils.c                       |  89 ----
 tools/gpio/gpio-utils.h                       |   6 -
 tools/testing/selftests/Makefile              |   9 -
 tools/testing/selftests/gpio/Makefile         |  26 +-
 tools/testing/selftests/gpio/config           |   1 +
 .../testing/selftests/gpio/gpio-mockup-cdev.c | 198 +++++++
 .../selftests/gpio/gpio-mockup-chardev.c      | 323 ------------
 .../selftests/gpio/gpio-mockup-sysfs.sh       | 168 ++----
 tools/testing/selftests/gpio/gpio-mockup.sh   | 497 ++++++++++++------
 tools/testing/selftests/kselftest_deps.sh     |   4 +-
 10 files changed, 603 insertions(+), 718 deletions(-)
 create mode 100644 tools/testing/selftests/gpio/gpio-mockup-cdev.c
 delete mode 100644 tools/testing/selftests/gpio/gpio-mockup-chardev.c

-- 
2.30.0

[PATCH v2 1/7] selftests: gpio: rework and simplify test implementation

[Kent Gibson]

The GPIO mockup selftests are overly complicated with separate
implementations of the tests for sysfs and cdev uAPI, and with the cdev
implementation being dependent on tools/gpio and libmount.

Rework the test implementation to provide a common test suite with a
simplified pluggable uAPI interface.  The cdev implementation utilises
the GPIO uAPI directly to remove the dependence on tools/gpio.
The simplified uAPI interface removes the need for any file system mount
checks in C, and so removes the dependence on libmount.

The rework also fixes the sysfs test implementation which has been broken
since the device created in the multiple gpiochip case was split into
separate devices.

Fixes: commit 8a39f597bcfd ("gpio: mockup: rework device probing")
Signed-off-by: Kent Gibson <warthog618@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
---
 tools/testing/selftests/gpio/Makefile         |  26 +-
 .../testing/selftests/gpio/gpio-mockup-cdev.c | 139 +++++
 .../selftests/gpio/gpio-mockup-sysfs.sh       | 168 ++----
 tools/testing/selftests/gpio/gpio-mockup.sh   | 490 ++++++++++++------
 4 files changed, 535 insertions(+), 288 deletions(-)
 create mode 100644 tools/testing/selftests/gpio/gpio-mockup-cdev.c

diff --git a/tools/testing/selftests/gpio/Makefile b/tools/testing/selftests/gpio/Makefile
index 32bdc978a711..e4363c64d40d 100644
--- a/tools/testing/selftests/gpio/Makefile
+++ b/tools/testing/selftests/gpio/Makefile
@@ -1,32 +1,8 @@
 # SPDX-License-Identifier: GPL-2.0
 
-VAR_CFLAGS := $(shell pkg-config --cflags mount 2>/dev/null)
-VAR_LDLIBS := $(shell pkg-config --libs mount 2>/dev/null)
-ifeq ($(VAR_LDLIBS),)
-VAR_LDLIBS := -lmount -I/usr/include/libmount
-endif
-
-CFLAGS += -O2 -g -std=gnu99 -Wall -I../../../../usr/include/ $(VAR_CFLAGS)
-LDLIBS += $(VAR_LDLIBS)
-
 TEST_PROGS := gpio-mockup.sh
 TEST_FILES := gpio-mockup-sysfs.sh
-TEST_PROGS_EXTENDED := gpio-mockup-chardev
-
-GPIODIR := $(realpath ../../../gpio)
-GPIOOBJ := gpio-utils.o
+TEST_GEN_PROGS_EXTENDED := gpio-mockup-cdev
 
-all: $(TEST_PROGS_EXTENDED)
-
-override define CLEAN
-	$(RM) $(TEST_PROGS_EXTENDED)
-	$(MAKE) -C $(GPIODIR) OUTPUT=$(GPIODIR)/ clean
-endef
-
-KSFT_KHDR_INSTALL := 1
 include ../lib.mk
 
-$(TEST_PROGS_EXTENDED): $(GPIODIR)/$(GPIOOBJ)
-
-$(GPIODIR)/$(GPIOOBJ):
-	$(MAKE) OUTPUT=$(GPIODIR)/ -C $(GPIODIR)
diff --git a/tools/testing/selftests/gpio/gpio-mockup-cdev.c b/tools/testing/selftests/gpio/gpio-mockup-cdev.c
new file mode 100644
index 000000000000..3a7fc3ac1349
--- /dev/null
+++ b/tools/testing/selftests/gpio/gpio-mockup-cdev.c
@@ -0,0 +1,139 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * GPIO mockup cdev test helper
+ *
+ * Copyright (C) 2020 Kent Gibson
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <linux/gpio.h>
+
+#define CONSUMER	"gpio-mockup-cdev"
+
+static int request_line_v1(int cfd, unsigned int offset,
+			   uint32_t flags, unsigned int val)
+{
+	struct gpiohandle_request req;
+	int ret;
+
+	memset(&req, 0, sizeof(req));
+	req.lines = 1;
+	req.lineoffsets[0] = offset;
+	req.flags = flags;
+	strcpy(req.consumer_label, CONSUMER);
+	if (flags & GPIOHANDLE_REQUEST_OUTPUT)
+		req.default_values[0] = val;
+
+	ret = ioctl(cfd, GPIO_GET_LINEHANDLE_IOCTL, &req);
+	if (ret == -1)
+		return -errno;
+	return req.fd;
+}
+
+static int get_value_v1(int lfd)
+{
+	struct gpiohandle_data vals;
+	int ret;
+
+	memset(&vals, 0, sizeof(vals));
+	ret = ioctl(lfd, GPIOHANDLE_GET_LINE_VALUES_IOCTL, &vals);
+	if (ret == -1)
+		return -errno;
+	return vals.values[0];
+}
+
+static void usage(char *prog)
+{
+	printf("Usage: %s [-l] [-b <bias>] [-s <value>] [-u <uAPI>] <gpiochip> <offset>\n", prog);
+	printf("        -b: set line bias to one of pull-down, pull-up, disabled\n");
+	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");
+	exit(-1);
+}
+
+static int wait_signal(void)
+{
+	int sig;
+	sigset_t wset;
+
+	sigemptyset(&wset);
+	sigaddset(&wset, SIGHUP);
+	sigaddset(&wset, SIGINT);
+	sigaddset(&wset, SIGTERM);
+	sigwait(&wset, &sig);
+
+	return sig;
+}
+
+int main(int argc, char *argv[])
+{
+	char *chip;
+	int opt, ret, cfd, lfd;
+	unsigned int offset, val;
+	uint32_t flags_v1;
+
+	ret = 0;
+	flags_v1 = GPIOHANDLE_REQUEST_INPUT;
+
+	while ((opt = getopt(argc, argv, "lb:s:u:")) != -1) {
+		switch (opt) {
+		case 'l':
+			flags_v1 |= GPIOHANDLE_REQUEST_ACTIVE_LOW;
+			break;
+		case 'b':
+			if (strcmp("pull-up", optarg) == 0)
+				flags_v1 |= GPIOHANDLE_REQUEST_BIAS_PULL_UP;
+			else if (strcmp("pull-down", optarg) == 0)
+				flags_v1 |= GPIOHANDLE_REQUEST_BIAS_PULL_DOWN;
+			else if (strcmp("disabled", optarg) == 0)
+				flags_v1 |= GPIOHANDLE_REQUEST_BIAS_DISABLE;
+			break;
+		case 's':
+			val = atoi(optarg);
+			flags_v1 &= ~GPIOHANDLE_REQUEST_INPUT;
+			flags_v1 |= GPIOHANDLE_REQUEST_OUTPUT;
+			break;
+		default:
+			usage(argv[0]);
+		}
+	}
+
+	if (argc < optind + 2)
+		usage(argv[0]);
+
+	chip = argv[optind];
+	offset = atoi(argv[optind + 1]);
+
+	cfd = open(chip, 0);
+	if (cfd == -1) {
+		fprintf(stderr, "Failed to open %s: %s\n", chip, strerror(errno));
+		return -errno;
+	}
+
+	lfd = request_line_v1(cfd, offset, flags_v1, val);
+
+	close(cfd);
+
+	if (lfd < 0) {
+		fprintf(stderr, "Failed to request %s:%d: %s\n", chip, offset, strerror(-lfd));
+		return lfd;
+	}
+
+	if (flags_v1 & GPIOHANDLE_REQUEST_OUTPUT)
+		wait_signal();
+	else
+		ret = get_value_v1(lfd);
+
+	close(lfd);
+
+	return ret;
+}
diff --git a/tools/testing/selftests/gpio/gpio-mockup-sysfs.sh b/tools/testing/selftests/gpio/gpio-mockup-sysfs.sh
index dd269d877562..2d2e5d8763b6 100755
--- a/tools/testing/selftests/gpio/gpio-mockup-sysfs.sh
+++ b/tools/testing/selftests/gpio/gpio-mockup-sysfs.sh
@@ -1,135 +1,77 @@
 
 # SPDX-License-Identifier: GPL-2.0
-is_consistent()
-{
-	val=
-
-	active_low_sysfs=`cat $GPIO_SYSFS/gpio$nr/active_low`
-	val_sysfs=`cat $GPIO_SYSFS/gpio$nr/value`
-	dir_sysfs=`cat $GPIO_SYSFS/gpio$nr/direction`
 
-	gpio_this_debugfs=`cat $GPIO_DEBUGFS |grep "gpio-$nr" | sed "s/(.*)//g"`
-	dir_debugfs=`echo $gpio_this_debugfs | awk '{print $2}'`
-	val_debugfs=`echo $gpio_this_debugfs | awk '{print $3}'`
-	if [ $val_debugfs = "lo" ]; then
-		val=0
-	elif [ $val_debugfs = "hi" ]; then
-		val=1
-	fi
+# Overrides functions in gpio-mockup.sh to test using the GPIO SYSFS uAPI
 
-	if [ $active_low_sysfs = "1" ]; then
-		if [ $val = "0" ]; then
-			val="1"
-		else
-			val="0"
-		fi
-	fi
+SYSFS=`grep -w sysfs /proc/mounts | cut -f2 -d' '`
+[ -d "$SYSFS" ] || skip "sysfs is not mounted"
 
-	if [ $val_sysfs = $val ] && [ $dir_sysfs = $dir_debugfs ]; then
-		echo -n "."
-	else
-		echo "test fail, exit"
-		die
-	fi
-}
+GPIO_SYSFS="${SYSFS}/class/gpio"
+[ -d "$GPIO_SYSFS" ] || skip "CONFIG_GPIO_SYSFS is not selected"
 
-test_pin_logic()
-{
-	nr=$1
-	direction=$2
-	active_low=$3
-	value=$4
+PLATFORM_SYSFS=$SYSFS/devices/platform
 
-	echo $direction > $GPIO_SYSFS/gpio$nr/direction
-	echo $active_low > $GPIO_SYSFS/gpio$nr/active_low
-	if [ $direction = "out" ]; then
-		echo $value > $GPIO_SYSFS/gpio$nr/value
-	fi
-	is_consistent $nr
-}
+sysfs_nr=
+sysfs_ldir=
 
-test_one_pin()
+# determine the sysfs GPIO number given the $chip and $offset
+# e.g. gpiochip1:32
+find_sysfs_nr()
 {
-	nr=$1
-
-	echo -n "test pin<$nr>"
-
-	echo $nr > $GPIO_SYSFS/export 2>/dev/null
-
-	if [ X$? != X0 ]; then
-		echo "test GPIO pin $nr failed"
-		die
-	fi
-
-	#"Checking if the sysfs is consistent with debugfs: "
-	is_consistent $nr
-
-	#"Checking the logic of active_low: "
-	test_pin_logic $nr out 1 1
-	test_pin_logic $nr out 1 0
-	test_pin_logic $nr out 0 1
-	test_pin_logic $nr out 0 0
-
-	#"Checking the logic of direction: "
-	test_pin_logic $nr in 1 1
-	test_pin_logic $nr out 1 0
-	test_pin_logic $nr low 0 1
-	test_pin_logic $nr high 0 0
-
-	echo $nr > $GPIO_SYSFS/unexport
-
-	echo "successful"
+	# e.g. /sys/devices/platform/gpio-mockup.1/gpiochip1
+	local platform=$(find $PLATFORM_SYSFS -mindepth 2 -maxdepth 2 -type d -name $chip)
+	[ "$platform" ] || fail "can't find platform of $chip"
+	# e.g. /sys/devices/platform/gpio-mockup.1/gpio/gpiochip508/base
+	local base=$(find ${platform%/*}/gpio/ -mindepth 2 -maxdepth 2 -type f -name base)
+	[ "$base" ] || fail "can't find base of $chip"
+	sysfs_nr=$(($(< "$base") + $offset))
+	sysfs_ldir="$GPIO_SYSFS/gpio$sysfs_nr"
 }
 
-test_one_pin_fail()
+acquire_line()
 {
-	nr=$1
-
-	echo $nr > $GPIO_SYSFS/export 2>/dev/null
-
-	if [ X$? != X0 ]; then
-		echo "test invalid pin $nr successful"
-	else
-		echo "test invalid pin $nr failed"
-		echo $nr > $GPIO_SYSFS/unexport 2>/dev/null
-		die
-	fi
+	[ "$sysfs_nr" ] && return
+	find_sysfs_nr
+	echo "$sysfs_nr" > "$GPIO_SYSFS/export"
 }
 
-list_chip()
+# The helpers being overridden...
+get_line()
 {
-	echo `ls -d $GPIO_DRV_SYSFS/gpiochip* 2>/dev/null`
+	[ -e "$sysfs_ldir/value" ] && echo $(< "$sysfs_ldir/value")
 }
 
-test_chip()
+set_line()
 {
-	chip=$1
-	name=`basename $chip`
-	base=`cat $chip/base`
-	ngpio=`cat $chip/ngpio`
-	printf "%-10s %-5s %-5s\n" $name $base $ngpio
-	if [ $ngpio = "0" ]; then
-		echo "number of gpio is zero is not allowed".
-	fi
-	test_one_pin $base
-	test_one_pin $(($base + $ngpio - 1))
-	test_one_pin $((( RANDOM % $ngpio )  + $base ))
+	acquire_line
+
+	for option in $*; do
+		case $option in
+		active-high)
+			echo 0 > "$sysfs_ldir/active_low"
+			;;
+		active-low)
+			echo 1 > "$sysfs_ldir/active_low"
+			;;
+		input)
+			echo "in" > "$sysfs_ldir/direction"
+			;;
+		0)
+			echo "out" > "$sysfs_ldir/direction"
+			echo 0 > "$sysfs_ldir/value"
+			;;
+		1)
+			echo "out" > "$sysfs_ldir/direction"
+			echo 1 > "$sysfs_ldir/value"
+			;;
+		esac
+	done
 }
 
-test_chips_sysfs()
+release_line()
 {
-       gpiochip=`list_chip $module`
-       if [ X"$gpiochip" = X ]; then
-               if [ X"$valid" = Xfalse ]; then
-                       echo "successful"
-               else
-                       echo "fail"
-                       die
-               fi
-       else
-               for chip in $gpiochip; do
-                       test_chip $chip
-               done
-       fi
+	[ "$sysfs_nr" ] || return 0
+	echo "$sysfs_nr" > "$GPIO_SYSFS/unexport"
+	sysfs_nr=
+	sysfs_ldir=
 }
-
diff --git a/tools/testing/selftests/gpio/gpio-mockup.sh b/tools/testing/selftests/gpio/gpio-mockup.sh
index 7f35b9880485..0aa8e4294de1 100755
--- a/tools/testing/selftests/gpio/gpio-mockup.sh
+++ b/tools/testing/selftests/gpio/gpio-mockup.sh
@@ -1,72 +1,55 @@
-#!/bin/bash
+#!/bin/bash -efu
 # SPDX-License-Identifier: GPL-2.0
 
 #exit status
-#1: Internal error
-#2: sysfs/debugfs not mount
-#3: insert module fail when gpio-mockup is a module.
-#4: Skip test including run as non-root user.
-#5: other reason.
-
-SYSFS=
-GPIO_SYSFS=
-GPIO_DRV_SYSFS=
+#0: success
+#1: fail
+#4: skip test - including run as non-root user
+
+BASE=${0%/*}
 DEBUGFS=
 GPIO_DEBUGFS=
-dev_type=
-module=
+dev_type="cdev"
+module="gpio-mockup"
+verbose=
+full_test=
+random=
+active_opt=
+bias_opt=
+line_set_pid=
 
-# Kselftest framework requirement - SKIP code is 4.
+# Kselftest return codes
+ksft_fail=1
 ksft_skip=4
 
 usage()
 {
 	echo "Usage:"
-	echo "$0 [-f] [-m name] [-t type]"
-	echo "-f:  full test. It maybe conflict with existence gpio device."
-	echo "-m:  module name, default name is gpio-mockup. It could also test"
-	echo "     other gpio device."
-	echo "-t:  interface type: chardev(char device) and sysfs(being"
-	echo "     deprecated). The first one is default"
-	echo ""
-	echo "$0 -h"
-	echo "This usage"
+	echo "$0 [-frv] [-t type]"
+	echo "-f:  full test (minimal set run by default)"
+	echo "-r:  test random lines as well as fence posts"
+	echo "-t:  interface type:"
+	echo "      cdev (character device ABI) - default"
+	echo "      sysfs (deprecated SYSFS ABI)"
+	echo "-v:  verbose progress reporting"
+	exit $ksft_fail
 }
 
-prerequisite()
+skip()
 {
-	msg="skip all tests:"
-	if [ $UID != 0 ]; then
-		echo $msg must be run as root >&2
-		exit $ksft_skip
-	fi
-	SYSFS=`mount -t sysfs | head -1 | awk '{ print $3 }'`
-	if [ ! -d "$SYSFS" ]; then
-		echo $msg sysfs is not mounted >&2
-		exit 2
-	fi
-	GPIO_SYSFS=`echo $SYSFS/class/gpio`
-	GPIO_DRV_SYSFS=`echo $SYSFS/devices/platform/$module/gpio`
-	DEBUGFS=`mount -t debugfs | head -1 | awk '{ print $3 }'`
-	if [ ! -d "$DEBUGFS" ]; then
-		echo $msg debugfs is not mounted >&2
-		exit 2
-	fi
-	GPIO_DEBUGFS=`echo $DEBUGFS/gpio`
-	source gpio-mockup-sysfs.sh
+	echo "$*" >&2
+	echo "GPIO $module test SKIP"
+	exit $ksft_skip
 }
 
-try_insert_module()
+prerequisite()
 {
-	if [ -d "$GPIO_DRV_SYSFS" ]; then
-		echo "$GPIO_DRV_SYSFS exist. Skip insert module"
-	else
-		modprobe -q $module $1
-		if [ X$? != X0 ]; then
-			echo $msg insmod $module failed >&2
-			exit 3
-		fi
-	fi
+	[ $(id -u) -eq 0 ] || skip "must be run as root"
+
+	DEBUGFS=$(grep -w debugfs /proc/mounts | cut -f2 -d' ')
+	[ -d "$DEBUGFS" ] || skip "debugfs is not mounted"
+
+	GPIO_DEBUGFS=$DEBUGFS/$module
 }
 
 remove_module()
@@ -74,133 +57,340 @@ remove_module()
 	modprobe -r -q $module
 }
 
-die()
+cleanup()
 {
+	set +e
+	release_line
 	remove_module
-	exit 5
+	jobs -p | xargs -r kill > /dev/null 2>&1
 }
 
-test_chips()
+fail()
 {
-	if [ X$dev_type = Xsysfs ]; then
-		echo "WARNING: sysfs ABI of gpio is going to deprecated."
-		test_chips_sysfs $*
-	else
-		$BASE/gpio-mockup-chardev $*
-	fi
+	echo "test failed: $*" >&2
+	echo "GPIO $module test FAIL"
+	exit $ksft_fail
+}
+
+try_insert_module()
+{
+	modprobe -q $module "$1" || fail "insert $module failed with error $?"
+}
+
+log()
+{
+	[ -z "$verbose" ] || echo "$*"
 }
 
-gpio_test()
+# The following line helpers, release_Line, get_line and set_line, all
+# make use of the global $chip and $offset variables.
+#
+# This implementation drives the GPIO character device (cdev) uAPI.
+# Other implementations may override these to test different uAPIs.
+
+# Release any resources related to the line
+release_line()
 {
-	param=$1
-	valid=$2
+	[ "$line_set_pid" ] && kill $line_set_pid && wait $line_set_pid || true
+	line_set_pid=
+}
 
-	if [ X"$param" = X ]; then
-		die
+# Read the current value of the line
+get_line()
+{
+	release_line
+
+	$BASE/gpio-mockup-cdev $active_opt /dev/$chip $offset
+	echo $?
+}
+
+# Set the state of the line
+#
+# Changes to line configuration are provided as parameters.
+# The line is assumed to be an output if the line value 0 or 1 is
+# specified, else an input.
+set_line()
+{
+	local val=
+
+	release_line
+
+	# parse config options...
+	for option in $*; do
+		case $option in
+		active-low)
+			active_opt="-l "
+			;;
+		active-high)
+			active_opt=
+			;;
+		bias-none)
+			bias_opt=
+			;;
+		pull-down)
+			bias_opt="-bpull-down "
+			;;
+		pull-up)
+			bias_opt="-bpull-up "
+			;;
+		0)
+			val=0
+			;;
+		1)
+			val=1
+			;;
+		esac
+	done
+
+	local cdev_opts=${active_opt}
+	if [ "$val" ]; then
+		$BASE/gpio-mockup-cdev $cdev_opts -s$val /dev/$chip $offset &
+		# failure to set is detected by reading mockup and toggling values
+		line_set_pid=$!
+		# allow for gpio-mockup-cdev to launch and request line
+		# (there is limited value in checking if line has been requested)
+		sleep 0.01
+	elif [ "$bias_opt" ]; then
+		cdev_opts=${cdev_opts}${bias_opt}
+		$BASE/gpio-mockup-cdev $cdev_opts /dev/$chip $offset || true
 	fi
-	try_insert_module "gpio_mockup_ranges=$param"
-	echo -n "GPIO $module test with ranges: <"
-	echo "$param>: "
-	printf "%-10s %s\n" $param
-	test_chips $module $valid
-	remove_module
 }
 
-BASE=`dirname $0`
+assert_line()
+{
+	local val
+	# don't need any retry here as set_mock allows for propagation
+	val=$(get_line)
+	[ "$val" = "$1" ] || fail "line value is ${val:-empty} when $1 was expected"
+}
+
+# The following mockup helpers all make use of the $mock_line
+assert_mock()
+{
+	local backoff_wait=10
+	local retry=0
+	local val
+	# retry allows for set propagation from uAPI to mockup
+	while true; do
+		val=$(< $mock_line)
+		[ "$val" = "$1" ] && break
+		retry=$((retry + 1))
+		[ $retry -lt 5 ] || fail "mockup $mock_line value ${val:-empty} when $1 expected"
+		sleep $(printf "%0.2f" $((backoff_wait))e-3)
+		backoff_wait=$((backoff_wait * 2))
+	done
+}
+
+set_mock()
+{
+	echo "$1" > $mock_line
+	# allow for set propagation - so we won't be in a race with set_line
+	assert_mock "$1"
+}
 
-dev_type=
-TEMP=`getopt -o fhm:t: -n '$0' -- "$@"`
+# test the functionality of a line
+#
+# The line is set from the mockup side and is read from the userspace side
+# (input), and is set from the userspace side and is read from the mockup side
+# (output).
+#
+# Setting the mockup pull using the userspace interface bias settings is
+# tested where supported by the userspace interface (cdev).
+test_line()
+{
+	chip=$1
+	offset=$2
+	log "test_line $chip $offset"
+	mock_line=$GPIO_DEBUGFS/$chip/$offset
+	[ -e "$mock_line" ] || fail "missing line $chip:$offset"
 
-if [ "$?" != "0" ]; then
-        echo "Parameter process failed, Terminating..." >&2
-        exit 1
-fi
+	# test input active-high
+	set_mock 1
+	set_line input active-high
+	assert_line 1
+	set_mock 0
+	assert_line 0
+	set_mock 1
+	assert_line 1
+
+	if [ "$full_test" ]; then
+		if [ "$dev_type" != "sysfs" ]; then
+			# test pulls
+			set_mock 0
+			set_line input pull-up
+			assert_line 1
+			set_mock 0
+			assert_line 0
+
+			set_mock 1
+			set_line input pull-down
+			assert_line 0
+			set_mock 1
+			assert_line 1
+
+			set_line bias-none
+		fi
+
+		# test input active-low
+		set_mock 0
+		set_line active-low
+		assert_line 1
+		set_mock 1
+		assert_line 0
+		set_mock 0
+		assert_line 1
+
+		# test output active-high
+		set_mock 1
+		set_line active-high 0
+		assert_mock 0
+		set_line 1
+		assert_mock 1
+		set_line 0
+		assert_mock 0
+	fi
+
+	# test output active-low
+	set_mock 0
+	set_line active-low 0
+	assert_mock 1
+	set_line 1
+	assert_mock 0
+	set_line 0
+	assert_mock 1
+
+	release_line
+}
+
+test_no_line()
+{
+	log test_no_line "$*"
+	[ ! -e "$GPIO_DEBUGFS/$1/$2" ] || fail "unexpected line $1:$2"
+}
 
-# Note the quotes around `$TEMP': they are essential!
-eval set -- "$TEMP"
+# Load the module and check that the expected number of gpiochips, with the
+# expected number of lines, are created and are functional.
+#
+# $1 is the gpio_mockup_ranges parameter for the module
+# The remaining parameters are the number of lines, n, expected for each of
+# the gpiochips expected to be created.
+#
+# For each gpiochip the fence post lines, 0 and n-1, are tested, and the
+# line on the far side of the fence post, n, is tested to not exist.
+#
+# If the $random flag is set then a random line in the middle of the
+# gpiochip is tested as well.
+insmod_test()
+{
+	local ranges=
+	local gc=
+	local width=
 
-while true; do
-	case $1 in
-	-f)
+	[ "${1:-}" ] || fail "missing ranges"
+	ranges=$1 ; shift
+	try_insert_module "gpio_mockup_ranges=$ranges"
+	log "GPIO $module test with ranges: <$ranges>:"
+	# e.g. /sys/kernel/debug/gpio-mockup/gpiochip1
+	gpiochip=$(find "$DEBUGFS/$module/" -name gpiochip* -type d | sort)
+	for chip in $gpiochip; do
+		gc=${chip##*/}
+		[ "${1:-}" ] || fail "unexpected chip - $gc"
+		width=$1 ; shift
+		test_line $gc 0
+		if [ "$random" -a $width -gt 2 ]; then
+			test_line $gc $((RANDOM % ($width - 2) + 1))
+		fi
+		test_line $gc $(($width - 1))
+		test_no_line $gc $width
+	done
+	[ "${1:-}" ] && fail "missing expected chip of width $1"
+	remove_module || fail "failed to remove module with error $?"
+}
+
+while getopts ":frvt:" opt; do
+	case $opt in
+	f)
 		full_test=true
-		shift
-		;;
-	-h)
-		usage
-		exit
 		;;
-	-m)
-		module=$2
-		shift 2
+	r)
+		random=true
 		;;
-	-t)
-		dev_type=$2
-		shift 2
+	t)
+		dev_type=$OPTARG
 		;;
-	--)
-		shift
-		break
+	v)
+		verbose=true
 		;;
 	*)
-		echo "Internal error!"
-		exit 1
+		usage
 		;;
 	esac
 done
+shift $((OPTIND - 1))
 
-if [ X"$module" = X ]; then
-	module="gpio-mockup"
-fi
-
-if [ X$dev_type != Xsysfs ]; then
-	dev_type="chardev"
-fi
+[ "${1:-}" ] && fail "unknown argument '$1'"
 
 prerequisite
 
-echo "1.  Test dynamic allocation of gpio successful means insert gpiochip and"
-echo "    manipulate gpio pin successful"
-gpio_test "-1,32" true
-gpio_test "-1,32,-1,32" true
-gpio_test "-1,32,-1,32,-1,32" true
-if [ X$full_test = Xtrue ]; then
-	gpio_test "-1,32,32,64" true
-	gpio_test "-1,32,40,64,-1,5" true
-	gpio_test "-1,32,32,64,-1,32" true
-	gpio_test "0,32,32,64,-1,32,-1,32" true
-	gpio_test "-1,32,-1,32,0,32,32,64" true
-	echo "2.  Do basic test: successful means insert gpiochip and"
-	echo "    manipulate gpio pin successful"
-	gpio_test "0,32" true
-	gpio_test "0,32,32,64" true
-	gpio_test "0,32,40,64,64,96" true
+trap 'exit $ksft_fail' SIGTERM SIGINT
+trap cleanup EXIT
+
+case "$dev_type" in
+sysfs)
+	source $BASE/gpio-mockup-sysfs.sh
+	echo "WARNING: gpio sysfs ABI is deprecated."
+	;;
+cdev)
+	;;
+*)
+	fail "unknown interface type: $dev_type"
+	;;
+esac
+
+remove_module || fail "can't remove existing $module module"
+
+# manual gpio allocation tests fail if a physical chip already exists
+[ "$full_test" -a -e "/dev/gpiochip0" ] && skip "full tests conflict with gpiochip0"
+
+echo "1.  Module load tests"
+echo "1.1.  dynamic allocation of gpio"
+insmod_test "-1,32" 32
+insmod_test "-1,23,-1,32" 23 32
+insmod_test "-1,23,-1,26,-1,32" 23 26 32
+if [ "$full_test" ]; then
+	echo "1.2.  manual allocation of gpio"
+	insmod_test "0,32" 32
+	insmod_test "0,32,32,60" 32 28
+	insmod_test "0,32,40,64,64,96" 32 24 32
+	echo "1.3.  dynamic and manual allocation of gpio"
+	insmod_test "-1,32,32,62" 32 30
+	insmod_test "-1,22,-1,23,0,24,32,64" 22 23 24 32
+	insmod_test "-1,32,32,60,-1,29" 32 28 29
+	insmod_test "-1,32,40,64,-1,5" 32 24 5
+	insmod_test "0,32,32,44,-1,22,-1,31" 32 12 22 31
 fi
-echo "3.  Error test: successful means insert gpiochip failed"
-echo "3.1 Test number of gpio overflow"
-#Currently: The max number of gpio(1024) is defined in arm architecture.
-gpio_test "-1,32,-1,1024" false
-if [ X$full_test = Xtrue ]; then
-	echo "3.2 Test zero line of gpio"
-	gpio_test "0,0" false
-	echo "3.3 Test range overlap"
-	echo "3.3.1 Test corner case"
-	gpio_test "0,32,0,1" false
-	gpio_test "0,32,32,64,32,40" false
-	gpio_test "0,32,35,64,35,45" false
-	gpio_test "0,32,31,32" false
-	gpio_test "0,32,32,64,36,37" false
-	gpio_test "0,32,35,64,34,36" false
-	echo "3.3.2 Test inserting invalid second gpiochip"
-	gpio_test "0,32,30,35" false
-	gpio_test "0,32,1,5" false
-	gpio_test "10,32,9,14" false
-	gpio_test "10,32,30,35" false
-	echo "3.3.3 Test others"
-	gpio_test "0,32,40,56,39,45" false
-	gpio_test "0,32,40,56,30,33" false
-	gpio_test "0,32,40,56,30,41" false
-	gpio_test "0,32,40,56,20,21" false
+echo "2.  Module load error tests"
+echo "2.1 gpio overflow"
+# Currently: The max number of gpio(1024) is defined in arm architecture.
+insmod_test "-1,1024"
+if [ "$full_test" ]; then
+	echo "2.2 no lines defined"
+	insmod_test "0,0"
+	echo "2.3 ignore range overlap"
+	insmod_test "0,32,0,1" 32
+	insmod_test "0,32,1,5" 32
+	insmod_test "0,32,30,35" 32
+	insmod_test "0,32,31,32" 32
+	insmod_test "10,32,30,35" 22
+	insmod_test "10,32,9,14" 22
+	insmod_test "0,32,20,21,40,56" 32 16
+	insmod_test "0,32,32,64,32,40" 32 32
+	insmod_test "0,32,32,64,36,37" 32 32
+	insmod_test "0,32,35,64,34,36" 32 29
+	insmod_test "0,30,35,64,35,45" 30 29
+	insmod_test "0,32,40,56,30,33" 32 16
+	insmod_test "0,32,40,56,30,41" 32 16
+	insmod_test "0,32,40,56,39,45" 32 16
 fi
 
-echo GPIO test PASS
-
+echo "GPIO $module test PASS"
-- 
2.30.0

[PATCH v2 2/7] selftests: gpio: remove obsolete gpio-mockup-chardev.c

[Kent Gibson]

GPIO selftests have changed to new gpio-mockup-cdev helper, so remove
old gpio-mockup-chardev helper.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
---
 .../selftests/gpio/gpio-mockup-chardev.c      | 323 ------------------
 1 file changed, 323 deletions(-)
 delete mode 100644 tools/testing/selftests/gpio/gpio-mockup-chardev.c

diff --git a/tools/testing/selftests/gpio/gpio-mockup-chardev.c b/tools/testing/selftests/gpio/gpio-mockup-chardev.c
deleted file mode 100644
index 73ead8828d3a..000000000000
--- a/tools/testing/selftests/gpio/gpio-mockup-chardev.c
+++ /dev/null
@@ -1,323 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * GPIO chardev test helper
- *
- * Copyright (C) 2016 Bamvor Jian Zhang
- */
-
-#define _GNU_SOURCE
-#include <unistd.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <string.h>
-#include <fcntl.h>
-#include <getopt.h>
-#include <sys/ioctl.h>
-#include <libmount.h>
-#include <err.h>
-#include <dirent.h>
-#include <linux/gpio.h>
-#include "../../../gpio/gpio-utils.h"
-
-#define CONSUMER	"gpio-selftest"
-#define	GC_NUM		10
-enum direction {
-	OUT,
-	IN
-};
-
-static int get_debugfs(char **path)
-{
-	struct libmnt_context *cxt;
-	struct libmnt_table *tb;
-	struct libmnt_iter *itr = NULL;
-	struct libmnt_fs *fs;
-	int found = 0, ret;
-
-	cxt = mnt_new_context();
-	if (!cxt)
-		err(EXIT_FAILURE, "libmount context allocation failed");
-
-	itr = mnt_new_iter(MNT_ITER_FORWARD);
-	if (!itr)
-		err(EXIT_FAILURE, "failed to initialize libmount iterator");
-
-	if (mnt_context_get_mtab(cxt, &tb))
-		err(EXIT_FAILURE, "failed to read mtab");
-
-	while (mnt_table_next_fs(tb, itr, &fs) == 0) {
-		const char *type = mnt_fs_get_fstype(fs);
-
-		if (!strcmp(type, "debugfs")) {
-			found = 1;
-			break;
-		}
-	}
-	if (found) {
-		ret = asprintf(path, "%s/gpio", mnt_fs_get_target(fs));
-		if (ret < 0)
-			err(EXIT_FAILURE, "failed to format string");
-	}
-
-	mnt_free_iter(itr);
-	mnt_free_context(cxt);
-
-	if (!found)
-		return -1;
-
-	return 0;
-}
-
-static int gpio_debugfs_get(const char *consumer, int *dir, int *value)
-{
-	char *debugfs;
-	FILE *f;
-	char *line = NULL;
-	size_t len = 0;
-	char *cur;
-	int found = 0;
-
-	if (get_debugfs(&debugfs) != 0)
-		err(EXIT_FAILURE, "debugfs is not mounted");
-
-	f = fopen(debugfs, "r");
-	if (!f)
-		err(EXIT_FAILURE, "read from gpio debugfs failed");
-
-	/*
-	 * gpio-2   (                    |gpio-selftest               ) in  lo
-	 */
-	while (getline(&line, &len, f) != -1) {
-		cur = strstr(line, consumer);
-		if (cur == NULL)
-			continue;
-
-		cur = strchr(line, ')');
-		if (!cur)
-			continue;
-
-		cur += 2;
-		if (!strncmp(cur, "out", 3)) {
-			*dir = OUT;
-			cur += 4;
-		} else if (!strncmp(cur, "in", 2)) {
-			*dir = IN;
-			cur += 4;
-		}
-
-		if (!strncmp(cur, "hi", 2))
-			*value = 1;
-		else if (!strncmp(cur, "lo", 2))
-			*value = 0;
-
-		found = 1;
-		break;
-	}
-	free(debugfs);
-	fclose(f);
-	free(line);
-
-	if (!found)
-		return -1;
-
-	return 0;
-}
-
-static struct gpiochip_info *list_gpiochip(const char *gpiochip_name, int *ret)
-{
-	struct gpiochip_info *cinfo;
-	struct gpiochip_info *current;
-	const struct dirent *ent;
-	DIR *dp;
-	char *chrdev_name;
-	int fd;
-	int i = 0;
-
-	cinfo = calloc(sizeof(struct gpiochip_info) * 4, GC_NUM + 1);
-	if (!cinfo)
-		err(EXIT_FAILURE, "gpiochip_info allocation failed");
-
-	current = cinfo;
-	dp = opendir("/dev");
-	if (!dp) {
-		*ret = -errno;
-		goto error_out;
-	} else {
-		*ret = 0;
-	}
-
-	while (ent = readdir(dp), ent) {
-		if (check_prefix(ent->d_name, "gpiochip")) {
-			*ret = asprintf(&chrdev_name, "/dev/%s", ent->d_name);
-			if (*ret < 0)
-				goto error_out;
-
-			fd = open(chrdev_name, 0);
-			if (fd == -1) {
-				*ret = -errno;
-				fprintf(stderr, "Failed to open %s\n",
-					chrdev_name);
-				goto error_close_dir;
-			}
-			*ret = ioctl(fd, GPIO_GET_CHIPINFO_IOCTL, current);
-			if (*ret == -1) {
-				perror("Failed to issue CHIPINFO IOCTL\n");
-				goto error_close_dir;
-			}
-			close(fd);
-			if (strcmp(current->label, gpiochip_name) == 0
-			    || check_prefix(current->label, gpiochip_name)) {
-				*ret = 0;
-				current++;
-				i++;
-			}
-		}
-	}
-
-	if ((!*ret && i == 0) || *ret < 0) {
-		free(cinfo);
-		cinfo = NULL;
-	}
-	if (!*ret && i > 0) {
-		cinfo = realloc(cinfo, sizeof(struct gpiochip_info) * 4 * i);
-		*ret = i;
-	}
-
-error_close_dir:
-	closedir(dp);
-error_out:
-	if (*ret < 0)
-		err(EXIT_FAILURE, "list gpiochip failed: %s", strerror(*ret));
-
-	return cinfo;
-}
-
-int gpio_pin_test(struct gpiochip_info *cinfo, int line, int flag, int value)
-{
-	struct gpiohandle_data data;
-	unsigned int lines[] = {line};
-	int fd;
-	int debugfs_dir = IN;
-	int debugfs_value = 0;
-	int ret;
-
-	data.values[0] = value;
-	ret = gpiotools_request_linehandle(cinfo->name, lines, 1, flag, &data,
-					   CONSUMER);
-	if (ret < 0)
-		goto fail_out;
-	else
-		fd = ret;
-
-	ret = gpio_debugfs_get(CONSUMER, &debugfs_dir, &debugfs_value);
-	if (ret) {
-		ret = -EINVAL;
-		goto fail_out;
-	}
-	if (flag & GPIOHANDLE_REQUEST_INPUT) {
-		if (debugfs_dir != IN) {
-			errno = -EINVAL;
-			ret = -errno;
-		}
-	} else if (flag & GPIOHANDLE_REQUEST_OUTPUT) {
-		if (flag & GPIOHANDLE_REQUEST_ACTIVE_LOW)
-			debugfs_value = !debugfs_value;
-
-		if (!(debugfs_dir == OUT && value == debugfs_value)) {
-			errno = -EINVAL;
-			ret = -errno;
-		}
-	}
-	gpiotools_release_linehandle(fd);
-
-fail_out:
-	if (ret)
-		err(EXIT_FAILURE, "gpio<%s> line<%d> test flag<0x%x> value<%d>",
-		    cinfo->name, line, flag, value);
-
-	return ret;
-}
-
-void gpio_pin_tests(struct gpiochip_info *cinfo, unsigned int line)
-{
-	printf("line<%d>", line);
-	gpio_pin_test(cinfo, line, GPIOHANDLE_REQUEST_OUTPUT, 0);
-	printf(".");
-	gpio_pin_test(cinfo, line, GPIOHANDLE_REQUEST_OUTPUT, 1);
-	printf(".");
-	gpio_pin_test(cinfo, line,
-		      GPIOHANDLE_REQUEST_OUTPUT | GPIOHANDLE_REQUEST_ACTIVE_LOW,
-		      0);
-	printf(".");
-	gpio_pin_test(cinfo, line,
-		      GPIOHANDLE_REQUEST_OUTPUT | GPIOHANDLE_REQUEST_ACTIVE_LOW,
-		      1);
-	printf(".");
-	gpio_pin_test(cinfo, line, GPIOHANDLE_REQUEST_INPUT, 0);
-	printf(".");
-}
-
-/*
- * ./gpio-mockup-chardev gpio_chip_name_prefix is_valid_gpio_chip
- * Return 0 if successful or exit with EXIT_FAILURE if test failed.
- * gpio_chip_name_prefix: The prefix of gpiochip you want to test. E.g.
- *			  gpio-mockup
- * is_valid_gpio_chip:	  Whether the gpio_chip is valid. 1 means valid,
- *			  0 means invalid which could not be found by
- *			  list_gpiochip.
- */
-int main(int argc, char *argv[])
-{
-	char *prefix;
-	int valid;
-	struct gpiochip_info *cinfo;
-	struct gpiochip_info *current;
-	int i;
-	int ret;
-
-	if (argc < 3) {
-		printf("Usage: %s prefix is_valid", argv[0]);
-		exit(EXIT_FAILURE);
-	}
-
-	prefix = argv[1];
-	valid = strcmp(argv[2], "true") == 0 ? 1 : 0;
-
-	printf("Test gpiochip %s: ", prefix);
-	cinfo = list_gpiochip(prefix, &ret);
-	if (!cinfo) {
-		if (!valid && ret == 0) {
-			printf("Invalid test successful\n");
-			ret = 0;
-			goto out;
-		} else {
-			ret = -EINVAL;
-			goto out;
-		}
-	} else if (cinfo && !valid) {
-		ret = -EINVAL;
-		goto out;
-	}
-	current = cinfo;
-	for (i = 0; i < ret; i++) {
-		gpio_pin_tests(current, 0);
-		gpio_pin_tests(current, current->lines - 1);
-		gpio_pin_tests(current, random() % current->lines);
-		current++;
-	}
-	ret = 0;
-	printf("successful\n");
-
-out:
-	if (ret)
-		fprintf(stderr, "gpio<%s> test failed\n", prefix);
-
-	if (cinfo)
-		free(cinfo);
-
-	if (ret)
-		exit(EXIT_FAILURE);
-
-	return ret;
-}
-- 
2.30.0

[PATCH v2 3/7] selftests: remove obsolete build restriction for gpio

[Kent Gibson]

Build restrictions related to the gpio-mockup-chardev helper are
no longer relevant so remove them.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
---
 tools/testing/selftests/Makefile | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index d9c283503159..5411041e63a0 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -121,15 +121,6 @@ ARCH           ?= $(SUBARCH)
 export KSFT_KHDR_INSTALL_DONE := 1
 export BUILD
 
-# build and run gpio when output directory is the src dir.
-# gpio has dependency on tools/gpio and builds tools/gpio
-# objects in the src directory in all cases making the src
-# repo dirty even when objects are relocated.
-ifneq (1,$(DEFAULT_INSTALL_HDR_PATH))
-	TMP := $(filter-out gpio, $(TARGETS))
-	TARGETS := $(TMP)
-endif
-
 # set default goal to all, so make without a target runs all, even when
 # all isn't the first target in the file.
 .DEFAULT_GOAL := all
-- 
2.30.0

[PATCH v2 4/7] selftests: remove obsolete gpio references from kselftest_deps.sh

[Kent Gibson]

GPIO Makefile has been greatly simplified so remove references to lines
which no longer exist.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
---
 tools/testing/selftests/kselftest_deps.sh | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/tools/testing/selftests/kselftest_deps.sh b/tools/testing/selftests/kselftest_deps.sh
index bbc04646346b..00e60d6eb16b 100755
--- a/tools/testing/selftests/kselftest_deps.sh
+++ b/tools/testing/selftests/kselftest_deps.sh
@@ -129,13 +129,11 @@ l2_tests=$(grep -r --include=Makefile ": LDLIBS" | \
 		grep -v "VAR_LDLIBS" | awk -F: '{print $1}')
 
 # Level 3
-# gpio,  memfd and others use pkg-config to find mount and fuse libs
+# memfd and others use pkg-config to find mount and fuse libs
 # respectively and save it in VAR_LDLIBS. If pkg-config doesn't find
 # any, VAR_LDLIBS set to default.
 # Use the default value and filter out pkg-config for dependency check.
 # e.g:
-# gpio/Makefile
-#	VAR_LDLIBS := $(shell pkg-config --libs mount) 2>/dev/null)
 # memfd/Makefile
 #	VAR_LDLIBS := $(shell pkg-config fuse --libs 2>/dev/null)
 
-- 
2.30.0

[PATCH v2 5/7] tools: gpio: remove uAPI v1 code no longer used by selftests

[Kent Gibson]

gpio-mockup-chardev helper has been obsoleted and removed, so also remove
the tools/gpio code that it, and nothing else, was using.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
---
 tools/gpio/gpio-utils.c | 89 -----------------------------------------
 tools/gpio/gpio-utils.h |  6 ---
 2 files changed, 95 deletions(-)

diff --git a/tools/gpio/gpio-utils.c b/tools/gpio/gpio-utils.c
index 37187e056c8b..1639b4d832cd 100644
--- a/tools/gpio/gpio-utils.c
+++ b/tools/gpio/gpio-utils.c
@@ -32,74 +32,6 @@
  * following api will request gpio lines, do the operation and then
  * release these lines.
  */
-/**
- * gpiotools_request_linehandle() - request gpio lines in a gpiochip
- * @device_name:	The name of gpiochip without prefix "/dev/",
- *			such as "gpiochip0"
- * @lines:		An array desired lines, specified by offset
- *			index for the associated GPIO device.
- * @num_lines:		The number of lines to request.
- * @flag:		The new flag for requsted gpio. Reference
- *			"linux/gpio.h" for the meaning of flag.
- * @data:		Default value will be set to gpio when flag is
- *			GPIOHANDLE_REQUEST_OUTPUT.
- * @consumer_label:	The name of consumer, such as "sysfs",
- *			"powerkey". This is useful for other users to
- *			know who is using.
- *
- * Request gpio lines through the ioctl provided by chardev. User
- * could call gpiotools_set_values() and gpiotools_get_values() to
- * read and write respectively through the returned fd. Call
- * gpiotools_release_linehandle() to release these lines after that.
- *
- * Return:		On success return the fd;
- *			On failure return the errno.
- */
-int gpiotools_request_linehandle(const char *device_name, unsigned int *lines,
-				 unsigned int num_lines, unsigned int flag,
-				 struct gpiohandle_data *data,
-				 const char *consumer_label)
-{
-	struct gpiohandle_request req;
-	char *chrdev_name;
-	int fd;
-	int i;
-	int ret;
-
-	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, %s\n",
-			chrdev_name, strerror(errno));
-		goto exit_free_name;
-	}
-
-	for (i = 0; i < num_lines; i++)
-		req.lineoffsets[i] = lines[i];
-
-	req.flags = flag;
-	strcpy(req.consumer_label, consumer_label);
-	req.lines = num_lines;
-	if (flag & GPIOHANDLE_REQUEST_OUTPUT)
-		memcpy(req.default_values, data, sizeof(req.default_values));
-
-	ret = ioctl(fd, GPIO_GET_LINEHANDLE_IOCTL, &req);
-	if (ret == -1) {
-		ret = -errno;
-		fprintf(stderr, "Failed to issue %s (%d), %s\n",
-			"GPIO_GET_LINEHANDLE_IOCTL", ret, strerror(errno));
-	}
-
-	if (close(fd) == -1)
-		perror("Failed to close GPIO character device file");
-exit_free_name:
-	free(chrdev_name);
-	return ret < 0 ? ret : req.fd;
-}
 
 /**
  * gpiotools_request_line() - request gpio lines in a gpiochip
@@ -215,27 +147,6 @@ int gpiotools_get_values(const int fd, struct gpio_v2_line_values *values)
 	return ret;
 }
 
-/**
- * gpiotools_release_linehandle(): Release the line(s) of gpiochip
- * @fd:			The fd returned by
- *			gpiotools_request_linehandle().
- *
- * Return:		On success return 0;
- *			On failure return the errno.
- */
-int gpiotools_release_linehandle(const int fd)
-{
-	int ret;
-
-	ret = close(fd);
-	if (ret == -1) {
-		perror("Failed to close GPIO LINEHANDLE device file");
-		ret = -errno;
-	}
-
-	return ret;
-}
-
 /**
  * gpiotools_release_line(): Release the line(s) of gpiochip
  * @fd:			The fd returned by
diff --git a/tools/gpio/gpio-utils.h b/tools/gpio/gpio-utils.h
index 6c69a9f1c253..8af7c8ee19ce 100644
--- a/tools/gpio/gpio-utils.h
+++ b/tools/gpio/gpio-utils.h
@@ -24,12 +24,6 @@ static inline int check_prefix(const char *str, const char *prefix)
 		strncmp(str, prefix, strlen(prefix)) == 0;
 }
 
-int gpiotools_request_linehandle(const char *device_name, unsigned int *lines,
-				 unsigned int num_lines, unsigned int flag,
-				 struct gpiohandle_data *data,
-				 const char *consumer_label);
-int gpiotools_release_linehandle(const int fd);
-
 int gpiotools_request_line(const char *device_name,
 			   unsigned int *lines,
 			   unsigned int num_lines,
-- 
2.30.0

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

[Kent Gibson]

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

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
---
 .../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 3a7fc3ac1349..e83eac71621a 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 0aa8e4294de1..0d6c5f7f95d2 100755
--- a/tools/testing/selftests/gpio/gpio-mockup.sh
+++ b/tools/testing/selftests/gpio/gpio-mockup.sh
@@ -14,6 +14,7 @@ module="gpio-mockup"
 verbose=
 full_test=
 random=
+uapi_opt=
 active_opt=
 bias_opt=
 line_set_pid=
@@ -30,6 +31,7 @@ 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
@@ -100,7 +102,8 @@ get_line()
 {
 	release_line
 
-	$BASE/gpio-mockup-cdev $active_opt /dev/$chip $offset
+	local cdev_opts=${uapi_opt}${active_opt}
+	$BASE/gpio-mockup-cdev $cdev_opts /dev/$chip $offset
 	echo $?
 }
 
@@ -142,7 +145,7 @@ 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 &
 		# failure to set is detected by reading mockup and toggling values
@@ -340,6 +343,10 @@ 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

[PATCH v2 7/7] selftests: gpio: add CONFIG_GPIO_CDEV to config

[Kent Gibson]

GPIO CDEV is now optional and required for the selftests so add it to
the config.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
---
 tools/testing/selftests/gpio/config | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/testing/selftests/gpio/config b/tools/testing/selftests/gpio/config
index abaa6902b7b6..ce100342c20b 100644
--- a/tools/testing/selftests/gpio/config
+++ b/tools/testing/selftests/gpio/config
@@ -1,2 +1,3 @@
 CONFIG_GPIOLIB=y
+CONFIG_GPIO_CDEV=y
 CONFIG_GPIO_MOCKUP=m
-- 
2.30.0

Re: [PATCH v2 1/7] selftests: gpio: rework and simplify test implementation

[Bartosz Golaszewski]

On Thu, Jan 7, 2021 at 3:58 AM Kent Gibson <warthog618@gmail.com> wrote:
>
> The GPIO mockup selftests are overly complicated with separate
> implementations of the tests for sysfs and cdev uAPI, and with the cdev
> implementation being dependent on tools/gpio and libmount.
>
> Rework the test implementation to provide a common test suite with a
> simplified pluggable uAPI interface.  The cdev implementation utilises
> the GPIO uAPI directly to remove the dependence on tools/gpio.
> The simplified uAPI interface removes the need for any file system mount
> checks in C, and so removes the dependence on libmount.
>
> The rework also fixes the sysfs test implementation which has been broken
> since the device created in the multiple gpiochip case was split into
> separate devices.
>
> Fixes: commit 8a39f597bcfd ("gpio: mockup: rework device probing")
> Signed-off-by: Kent Gibson <warthog618@gmail.com>
> Acked-by: Linus Walleij <linus.walleij@linaro.org>


The C part looks good to me. For the shell part I would probably do a
couple things differently but since we don't really have a coding
style for shell scripts in the kernel, I don't want to block these
patches, so:

Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Re: [PATCH v2 2/7] selftests: gpio: remove obsolete gpio-mockup-chardev.c

[Bartosz Golaszewski]

On Thu, Jan 7, 2021 at 3:58 AM Kent Gibson <warthog618@gmail.com> wrote:
>
> GPIO selftests have changed to new gpio-mockup-cdev helper, so remove
> old gpio-mockup-chardev helper.
>
> Signed-off-by: Kent Gibson <warthog618@gmail.com>
> Acked-by: Linus Walleij <linus.walleij@linaro.org>
> ---

Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Re: [PATCH v2 3/7] selftests: remove obsolete build restriction for gpio

[Bartosz Golaszewski]

On Thu, Jan 7, 2021 at 3:58 AM Kent Gibson <warthog618@gmail.com> wrote:
>
> Build restrictions related to the gpio-mockup-chardev helper are
> no longer relevant so remove them.
>
> Signed-off-by: Kent Gibson <warthog618@gmail.com>
> Acked-by: Linus Walleij <linus.walleij@linaro.org>
> ---
>  tools/testing/selftests/Makefile | 9 ---------
>  1 file changed, 9 deletions(-)
>
> diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
> index d9c283503159..5411041e63a0 100644
> --- a/tools/testing/selftests/Makefile
> +++ b/tools/testing/selftests/Makefile
> @@ -121,15 +121,6 @@ ARCH           ?= $(SUBARCH)
>  export KSFT_KHDR_INSTALL_DONE := 1
>  export BUILD
>
> -# build and run gpio when output directory is the src dir.
> -# gpio has dependency on tools/gpio and builds tools/gpio
> -# objects in the src directory in all cases making the src
> -# repo dirty even when objects are relocated.
> -ifneq (1,$(DEFAULT_INSTALL_HDR_PATH))
> -       TMP := $(filter-out gpio, $(TARGETS))
> -       TARGETS := $(TMP)
> -endif
> -
>  # set default goal to all, so make without a target runs all, even when
>  # all isn't the first target in the file.
>  .DEFAULT_GOAL := all
> --
> 2.30.0
>

Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Re: [PATCH v2 4/7] selftests: remove obsolete gpio references from kselftest_deps.sh

[Bartosz Golaszewski]

On Thu, Jan 7, 2021 at 3:58 AM Kent Gibson <warthog618@gmail.com> wrote:
>
> GPIO Makefile has been greatly simplified so remove references to lines
> which no longer exist.
>
> Signed-off-by: Kent Gibson <warthog618@gmail.com>
> Acked-by: Linus Walleij <linus.walleij@linaro.org>
> ---
>  tools/testing/selftests/kselftest_deps.sh | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/tools/testing/selftests/kselftest_deps.sh b/tools/testing/selftests/kselftest_deps.sh
> index bbc04646346b..00e60d6eb16b 100755
> --- a/tools/testing/selftests/kselftest_deps.sh
> +++ b/tools/testing/selftests/kselftest_deps.sh
> @@ -129,13 +129,11 @@ l2_tests=$(grep -r --include=Makefile ": LDLIBS" | \
>                 grep -v "VAR_LDLIBS" | awk -F: '{print $1}')
>
>  # Level 3
> -# gpio,  memfd and others use pkg-config to find mount and fuse libs
> +# memfd and others use pkg-config to find mount and fuse libs
>  # respectively and save it in VAR_LDLIBS. If pkg-config doesn't find
>  # any, VAR_LDLIBS set to default.
>  # Use the default value and filter out pkg-config for dependency check.
>  # e.g:
> -# gpio/Makefile
> -#      VAR_LDLIBS := $(shell pkg-config --libs mount) 2>/dev/null)
>  # memfd/Makefile
>  #      VAR_LDLIBS := $(shell pkg-config fuse --libs 2>/dev/null)
>
> --
> 2.30.0
>

Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Re: [PATCH v2 5/7] tools: gpio: remove uAPI v1 code no longer used by selftests

[Bartosz Golaszewski]

On Thu, Jan 7, 2021 at 3:58 AM Kent Gibson <warthog618@gmail.com> wrote:
>
> gpio-mockup-chardev helper has been obsoleted and removed, so also remove
> the tools/gpio code that it, and nothing else, was using.
>
> Signed-off-by: Kent Gibson <warthog618@gmail.com>
> Acked-by: Linus Walleij <linus.walleij@linaro.org>
> ---

Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

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

[Bartosz Golaszewski]

On Thu, Jan 7, 2021 at 3:59 AM Kent Gibson <warthog618@gmail.com> wrote:
>
> Add a port to the GPIO uAPI v2 interface and make it the default.
>
> Signed-off-by: Kent Gibson <warthog618@gmail.com>
> Acked-by: Linus Walleij <linus.walleij@linaro.org>

Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Re: [PATCH v2 7/7] selftests: gpio: add CONFIG_GPIO_CDEV to config

[Bartosz Golaszewski]

On Thu, Jan 7, 2021 at 3:59 AM Kent Gibson <warthog618@gmail.com> wrote:
>
> GPIO CDEV is now optional and required for the selftests so add it to
> the config.
>
> Signed-off-by: Kent Gibson <warthog618@gmail.com>
> Acked-by: Linus Walleij <linus.walleij@linaro.org>
> ---
>  tools/testing/selftests/gpio/config | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/tools/testing/selftests/gpio/config b/tools/testing/selftests/gpio/config
> index abaa6902b7b6..ce100342c20b 100644
> --- a/tools/testing/selftests/gpio/config
> +++ b/tools/testing/selftests/gpio/config
> @@ -1,2 +1,3 @@
>  CONFIG_GPIOLIB=y
> +CONFIG_GPIO_CDEV=y
>  CONFIG_GPIO_MOCKUP=m
> --
> 2.30.0
>

Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Re: [PATCH v2 1/7] selftests: gpio: rework and simplify test implementation

[Kent Gibson]

On Thu, Jan 07, 2021 at 10:57:25AM +0800, Kent Gibson wrote:
> The GPIO mockup selftests are overly complicated with separate
> implementations of the tests for sysfs and cdev uAPI, and with the cdev
> implementation being dependent on tools/gpio and libmount.
> 
> Rework the test implementation to provide a common test suite with a
> simplified pluggable uAPI interface.  The cdev implementation utilises
> the GPIO uAPI directly to remove the dependence on tools/gpio.
> The simplified uAPI interface removes the need for any file system mount
> checks in C, and so removes the dependence on libmount.
> 
> The rework also fixes the sysfs test implementation which has been broken
> since the device created in the multiple gpiochip case was split into
> separate devices.
> 
> Fixes: commit 8a39f597bcfd ("gpio: mockup: rework device probing")
> Signed-off-by: Kent Gibson <warthog618@gmail.com>
> Acked-by: Linus Walleij <linus.walleij@linaro.org>
> ---

Just a note that the 'commit' should be removed from the Fixes tag.

That will be fixed in v3.

The patches have been reviewed from the gpio side - any feedback from the
selftest side?

Cheers,
Kent.

Re: [PATCH v2 0/7] selftests: gpio: rework and port to GPIO uAPI v2

[Linus Walleij]

On Thu, Jan 7, 2021 at 3:58 AM Kent Gibson <warthog618@gmail.com> wrote:

>   selftests: gpio: rework and simplify test implementation
>   selftests: gpio: remove obsolete gpio-mockup-chardev.c
>   selftests: remove obsolete build restriction for gpio
>   selftests: remove obsolete gpio references from kselftest_deps.sh
>   tools: gpio: remove uAPI v1 code no longer used by selftests
>   selftests: gpio: port to GPIO uAPI v2
>   selftests: gpio: add CONFIG_GPIO_CDEV to config

Bartosz I think you can just merge these patches into the GPIO tree, at least
I think that is what I have done in the past.

Yours,
Linus Walleij

Re: [PATCH v2 0/7] selftests: gpio: rework and port to GPIO uAPI v2

[Kent Gibson]

On Mon, Jan 18, 2021 at 04:04:51PM +0100, Linus Walleij wrote:
> On Thu, Jan 7, 2021 at 3:58 AM Kent Gibson <warthog618@gmail.com> wrote:
> 
> >   selftests: gpio: rework and simplify test implementation
> >   selftests: gpio: remove obsolete gpio-mockup-chardev.c
> >   selftests: remove obsolete build restriction for gpio
> >   selftests: remove obsolete gpio references from kselftest_deps.sh
> >   tools: gpio: remove uAPI v1 code no longer used by selftests
> >   selftests: gpio: port to GPIO uAPI v2
> >   selftests: gpio: add CONFIG_GPIO_CDEV to config
> 
> Bartosz I think you can just merge these patches into the GPIO tree, at least
> I think that is what I have done in the past.
> 

Could you touch up that Fixes tag in patch 1 if you merge v2?

Thanks,
Kent.

Re: [PATCH v2 0/7] selftests: gpio: rework and port to GPIO uAPI v2

[Bartosz Golaszewski]

On Tue, Jan 19, 2021 at 1:35 AM Kent Gibson <warthog618@gmail.com> wrote:
>
> On Mon, Jan 18, 2021 at 04:04:51PM +0100, Linus Walleij wrote:
> > On Thu, Jan 7, 2021 at 3:58 AM Kent Gibson <warthog618@gmail.com> wrote:
> >
> > >   selftests: gpio: rework and simplify test implementation
> > >   selftests: gpio: remove obsolete gpio-mockup-chardev.c
> > >   selftests: remove obsolete build restriction for gpio
> > >   selftests: remove obsolete gpio references from kselftest_deps.sh
> > >   tools: gpio: remove uAPI v1 code no longer used by selftests
> > >   selftests: gpio: port to GPIO uAPI v2
> > >   selftests: gpio: add CONFIG_GPIO_CDEV to config
> >
> > Bartosz I think you can just merge these patches into the GPIO tree, at least
> > I think that is what I have done in the past.
> >
>
> Could you touch up that Fixes tag in patch 1 if you merge v2?
>
> Thanks,
> Kent.

Kent,

This doesn't apply to my for-next branch - there's a conflict in
tools/testing/selftests/gpio/Makefile, could you take a look?

Bartosz

Re: [PATCH v2 0/7] selftests: gpio: rework and port to GPIO uAPI v2

[Kent Gibson]

On Tue, Jan 19, 2021 at 11:37:46AM +0100, Bartosz Golaszewski wrote:
> On Tue, Jan 19, 2021 at 1:35 AM Kent Gibson <warthog618@gmail.com> wrote:
> >
> > On Mon, Jan 18, 2021 at 04:04:51PM +0100, Linus Walleij wrote:
> > > On Thu, Jan 7, 2021 at 3:58 AM Kent Gibson <warthog618@gmail.com> wrote:
> > >
> > > >   selftests: gpio: rework and simplify test implementation
> > > >   selftests: gpio: remove obsolete gpio-mockup-chardev.c
> > > >   selftests: remove obsolete build restriction for gpio
> > > >   selftests: remove obsolete gpio references from kselftest_deps.sh
> > > >   tools: gpio: remove uAPI v1 code no longer used by selftests
> > > >   selftests: gpio: port to GPIO uAPI v2
> > > >   selftests: gpio: add CONFIG_GPIO_CDEV to config
> > >
> > > Bartosz I think you can just merge these patches into the GPIO tree, at least
> > > I think that is what I have done in the past.
> > >
> >
> > Could you touch up that Fixes tag in patch 1 if you merge v2?
> >
> > Thanks,
> > Kent.
> 
> Kent,
> 
> This doesn't apply to my for-next branch - there's a conflict in
> tools/testing/selftests/gpio/Makefile, could you take a look?
> 

Which is your for-next branch?

The patch set is based on and applies cleanly to gpio/for-next 7ac554888233,
so I'm not sure which branch you are targetting.

Cheers,
Kent.

Re: [PATCH v2 0/7] selftests: gpio: rework and port to GPIO uAPI v2

[Bartosz Golaszewski]

On Tue, Jan 19, 2021 at 11:59 AM Kent Gibson <warthog618@gmail.com> wrote:
>
> On Tue, Jan 19, 2021 at 11:37:46AM +0100, Bartosz Golaszewski wrote:
> > On Tue, Jan 19, 2021 at 1:35 AM Kent Gibson <warthog618@gmail.com> wrote:
> > >
> > > On Mon, Jan 18, 2021 at 04:04:51PM +0100, Linus Walleij wrote:
> > > > On Thu, Jan 7, 2021 at 3:58 AM Kent Gibson <warthog618@gmail.com> wrote:
> > > >
> > > > >   selftests: gpio: rework and simplify test implementation
> > > > >   selftests: gpio: remove obsolete gpio-mockup-chardev.c
> > > > >   selftests: remove obsolete build restriction for gpio
> > > > >   selftests: remove obsolete gpio references from kselftest_deps.sh
> > > > >   tools: gpio: remove uAPI v1 code no longer used by selftests
> > > > >   selftests: gpio: port to GPIO uAPI v2
> > > > >   selftests: gpio: add CONFIG_GPIO_CDEV to config
> > > >
> > > > Bartosz I think you can just merge these patches into the GPIO tree, at least
> > > > I think that is what I have done in the past.
> > > >
> > >
> > > Could you touch up that Fixes tag in patch 1 if you merge v2?
> > >
> > > Thanks,
> > > Kent.
> >
> > Kent,
> >
> > This doesn't apply to my for-next branch - there's a conflict in
> > tools/testing/selftests/gpio/Makefile, could you take a look?
> >
>
> Which is your for-next branch?
>
> The patch set is based on and applies cleanly to gpio/for-next 7ac554888233,
> so I'm not sure which branch you are targetting.
>
> Cheers,
> Kent.

Linus W is not picking up patches this release - everything goes through:

    git.kernel.org/pub/scm/linux/kernel/git/brgl/linux.git gpio/for-next

Sorry for the confusion.

Bartosz

Re: [PATCH v2 0/7] selftests: gpio: rework and port to GPIO uAPI v2

[Kent Gibson]

On Tue, Jan 19, 2021 at 12:02:13PM +0100, Bartosz Golaszewski wrote:
> On Tue, Jan 19, 2021 at 11:59 AM Kent Gibson <warthog618@gmail.com> wrote:
> >
> > On Tue, Jan 19, 2021 at 11:37:46AM +0100, Bartosz Golaszewski wrote:
> > > On Tue, Jan 19, 2021 at 1:35 AM Kent Gibson <warthog618@gmail.com> wrote:
> > > >
> > > > On Mon, Jan 18, 2021 at 04:04:51PM +0100, Linus Walleij wrote:
> > > > > On Thu, Jan 7, 2021 at 3:58 AM Kent Gibson <warthog618@gmail.com> wrote:
> > > > >
> > > > > >   selftests: gpio: rework and simplify test implementation
> > > > > >   selftests: gpio: remove obsolete gpio-mockup-chardev.c
> > > > > >   selftests: remove obsolete build restriction for gpio
> > > > > >   selftests: remove obsolete gpio references from kselftest_deps.sh
> > > > > >   tools: gpio: remove uAPI v1 code no longer used by selftests
> > > > > >   selftests: gpio: port to GPIO uAPI v2
> > > > > >   selftests: gpio: add CONFIG_GPIO_CDEV to config
> > > > >
> > > > > Bartosz I think you can just merge these patches into the GPIO tree, at least
> > > > > I think that is what I have done in the past.
> > > > >
> > > >
> > > > Could you touch up that Fixes tag in patch 1 if you merge v2?
> > > >
> > > > Thanks,
> > > > Kent.
> > >
> > > Kent,
> > >
> > > This doesn't apply to my for-next branch - there's a conflict in
> > > tools/testing/selftests/gpio/Makefile, could you take a look?
> > >
> >
> > Which is your for-next branch?
> >
> > The patch set is based on and applies cleanly to gpio/for-next 7ac554888233,
> > so I'm not sure which branch you are targetting.
> >
> > Cheers,
> > Kent.
> 
> Linus W is not picking up patches this release - everything goes through:
> 
>     git.kernel.org/pub/scm/linux/kernel/git/brgl/linux.git gpio/for-next
> 
> Sorry for the confusion.
> 

Ah, ok Michael Ellerman has been improving the Makefile toworkaround
the build dependency issues for some cases.

My changes supersede all that - a basic Makefile is now sufficient.
I'll send out a v3 shortly.

Cheers,
Kent.