linux-stable.git/tools/gpio, branch linux-4.9.y

tools: gpio-hammer: Avoid potential overflow in main

2020-10-01T18:40:10+00:00

[ Upstream commit d1ee7e1f5c9191afb69ce46cc7752e4257340a31 ]

If '-o' was used more than 64 times in a single invocation of gpio-hammer,
this could lead to an overflow of the 'lines' array. This commit fixes
this by avoiding the overflow and giving a proper diagnostic back to the
user

Signed-off-by: Gabriel Ravier 
Signed-off-by: Bartosz Golaszewski 
Signed-off-by: Sasha Levin

tools: gpio: Fix out-of-tree build regression

2020-04-24T05:58:57+00:00

commit 82f04bfe2aff428b063eefd234679b2d693228ed upstream.

Commit 0161a94e2d1c7 ("tools: gpio: Correctly add make dependencies for
gpio_utils") added a make rule for gpio-utils-in.o but used $(output)
instead of the correct $(OUTPUT) for the output directory, breaking
out-of-tree build (O=xx) with the following error:

  No rule to make target 'out/tools/gpio/gpio-utils-in.o', needed by 'out/tools/gpio/lsgpio-in.o'.  Stop.

Fix that.

Fixes: 0161a94e2d1c ("tools: gpio: Correctly add make dependencies for gpio_utils")
Cc: 
Cc: Laura Abbott 
Signed-off-by: Anssi Hannula 
Link: https://lore.kernel.org/r/20200325103154.32235-1-anssi.hannula@bitwise.fi
Reviewed-by: Bartosz Golaszewski 
Signed-off-by: Linus Walleij 
Signed-off-by: Greg Kroah-Hartman

tools: gpio: Correctly add make dependencies for gpio_utils

2019-11-28T17:28:07+00:00

commit 0161a94e2d1c713bd34d72bc0239d87c31747bf7 upstream.

gpio tools fail to build correctly with make parallelization:

$ make -s -j24
ld: gpio-utils.o: file not recognized: file truncated
make[1]: *** [/home/labbott/linux_upstream/tools/build/Makefile.build:145: lsgpio-in.o] Error 1
make: *** [Makefile:43: lsgpio-in.o] Error 2
make: *** Waiting for unfinished jobs....

This is because gpio-utils.o is used across multiple targets.
Fix this by making gpio-utios.o a proper dependency.

Cc: 
Signed-off-by: Laura Abbott 
Signed-off-by: Bartosz Golaszewski 
Signed-off-by: Greg Kroah-Hartman

tools/gpio: Fix build error with musl libc

2018-02-03T16:05:34+00:00

commit 1696784eb7b52b13b62d160c028ef2c2c981d4f2 upstream.

The GPIO tools build fails when using a buildroot toolchain that uses musl
as it's C library:

arm-broomstick-linux-musleabi-gcc -Wp,-MD,./.gpio-event-mon.o.d \
 -Wp,-MT,gpio-event-mon.o -O2 -Wall -g -D_GNU_SOURCE \
 -Iinclude -D"BUILD_STR(s)=#s" -c -o gpio-event-mon.o gpio-event-mon.c
gpio-event-mon.c:30:6: error: unknown type name ‘u_int32_t’; did you mean ‘uint32_t’?
      u_int32_t handleflags,
      ^~~~~~~~~
      uint32_t

The glibc headers installed on my laptop include sys/types.h in
unistd.h, but it appears that musl does not.

Fixes: 97f69747d8b1 ("tools/gpio: add the gpio-event-mon tool")
Signed-off-by: Joel Stanley 
Signed-off-by: Linus Walleij 
Signed-off-by: Greg Kroah-Hartman

tools/gpio: fix gpio-event-mon header comment

2016-08-08T07:50:22+00:00

Fixes: 97f69747d8b1 ('tools/gpio: add the gpio-event-mon tool')
Signed-off-by: Baruch Siach 
Signed-off-by: Linus Walleij

tools/gpio: add install section

2016-06-23T09:07:13+00:00

Allow user to call install target.

Signed-off-by: Andy Shevchenko 
Acked-by: Alexandre Courbot 
Tested-by: Alexandre Courbot 
Signed-off-by: Linus Walleij

tools/gpio: move to tools buildsystem

2016-06-23T09:07:13+00:00

There is a nice buildsystem dedicated for userspace tools in Linux kernel tree.
Switch gpio target to be built by it.

Signed-off-by: Andy Shevchenko 
Acked-by: Alexandre Courbot 
Tested-by: Alexandre Courbot 
Signed-off-by: Linus Walleij

tools/gpio: add the gpio-event-mon tool

2016-06-15T07:29:29+00:00

The gpio-event-mon is used from userspace as an example of how
to monitor GPIO line events. It will latch on to a certain
GPIO line on a certain gpiochip and print timestamped events
as they arrive.

Example output:
$ gpio-event-mon -n gpiochip2 -o 0 -r -f
Monitoring line 0 on gpiochip2
Initial line value: 1
GPIO EVENT 946685798487609863: falling edge
GPIO EVENT 946685798732482910: rising edge
GPIO EVENT 946685799115997314: falling edge
GPIO EVENT 946685799381469726: rising edge

Signed-off-by: Linus Walleij

tools/gpio: add the gpio-hammer tool

2016-06-15T07:29:04+00:00

The gpio-hammer is used from userspace as an example of how
to retrieve a GPIO handle for one or several GPIO lines and
hammer the outputs from low to high and back again. It will
pulse the selected lines once per second for a specified
number of times or indefinitely if no loop count is
supplied.

Example output:
$ gpio-hammer -n gpiochip0 -o5 -o6 -o7
Hammer lines [5, 6, 7] on gpiochip0, initial states: [1, 1, 1]
[-] [5: 0, 6: 0, 7: 0]

Tested-by: Michael Welling 
Signed-off-by: Linus Walleij

tools/gpio: Add missing initialization of device_name

2016-03-31T09:51:30+00:00

lsgpio.c: In function ‘main’:
lsgpio.c:166:7: warning: ‘device_name’ may be used uninitialized in this functio
n [-Wmaybe-uninitialized]
   ret = list_device(device_name);
       ^

Signed-off-by: Geert Uytterhoeven 
Signed-off-by: Linus Walleij