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Commit 6d591c46 authored by Linus Walleij's avatar Linus Walleij
Browse files

tools/gpio: create GPIO tools 



This creates GPIO tools under tools/gpio/* and adds a single
example program to list the GPIOs on a system. When proper
devices are created it provides this minimal output:

Cc: Johan Hovold <johan@kernel.org>
Cc: Michael Welling <mwelling@ieee.org>
Cc: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 3c702e99

MAINTAINERS

+1 −0
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@@ -4820,6 +4820,7 @@ F: include/linux/gpio/ 
F:	include/linux/gpio.h

F:	include/asm-generic/gpio.h

F:	include/uapi/linux/gpio.h

F:	tools/gpio/



GRE DEMULTIPLEXER DRIVER

M:	Dmitry Kozlov <xeb@mail.ru>

tools/Makefile

+5 −3
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@@ -13,6 +13,7 @@ help: 
	@echo '  cpupower               - a tool for all things x86 CPU power'

	@echo '  firewire               - the userspace part of nosy, an IEEE-1394 traffic sniffer'

	@echo '  freefall               - laptop accelerometer program for disk protection'

	@echo '  gpio                   - GPIO tools'

	@echo '  hv                     - tools used when in Hyper-V clients'

	@echo '  iio                    - IIO tools'

	@echo '  lguest                 - a minimal 32-bit x86 hypervisor'
@@ -53,7 +54,7 @@ acpi: FORCE 
cpupower: FORCE

	$(call descend,power/$@)



cgroup firewire hv guest spi usb virtio vm net iio: FORCE

cgroup firewire hv guest spi usb virtio vm net iio gpio: FORCE

	$(call descend,$@)



liblockdep: FORCE
@@ -119,7 +120,7 @@ acpi_clean: 
cpupower_clean:

	$(call descend,power/cpupower,clean)



cgroup_clean hv_clean firewire_clean lguest_clean spi_clean usb_clean virtio_clean vm_clean net_clean iio_clean:

cgroup_clean hv_clean firewire_clean lguest_clean spi_clean usb_clean virtio_clean vm_clean net_clean iio_clean gpio_clean:

	$(call descend,$(@:_clean=),clean)



liblockdep_clean:
@@ -155,6 +156,7 @@ build_clean: 
clean: acpi_clean cgroup_clean cpupower_clean hv_clean firewire_clean lguest_clean \

		perf_clean selftests_clean turbostat_clean spi_clean usb_clean virtio_clean \

		vm_clean net_clean iio_clean x86_energy_perf_policy_clean tmon_clean \

		freefall_clean build_clean libbpf_clean libsubcmd_clean liblockdep_clean

		freefall_clean build_clean libbpf_clean libsubcmd_clean liblockdep_clean \

		gpio_clean



.PHONY: FORCE

tools/gpio/Makefile

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+12 −0
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CC = $(CROSS_COMPILE)gcc

CFLAGS += -Wall -g -D_GNU_SOURCE



all: lsgpio



lsgpio: lsgpio.o gpio-utils.o



%.o: %.c gpio-utils.h



.PHONY: clean

clean:

	rm -f *.o lsgpio

tools/gpio/gpio-utils.c

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/*

 * GPIO tools - helpers library for the GPIO tools

 *

 * Copyright (C) 2015 Linus Walleij

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 as published by

 * the Free Software Foundation.

 */



#include "gpio-utils.h"

tools/gpio/gpio-utils.h

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/*

 * GPIO tools - utility helpers library for the GPIO tools

 *

 * Copyright (C) 2015 Linus Walleij

 *

 * Portions copied from iio_utils and lssio:

 * Copyright (c) 2010 Manuel Stahl <manuel.stahl@iis.fraunhofer.de>

 * Copyright (c) 2008 Jonathan Cameron

 * *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 as published by

 * the Free Software Foundation.

 */

#ifndef _GPIO_UTILS_H_

#define _GPIO_UTILS_H_



#include <string.h>



static inline int check_prefix(const char *str, const char *prefix)

{

	return strlen(str) > strlen(prefix) &&

		strncmp(str, prefix, strlen(prefix)) == 0;

}



#endif /* _GPIO_UTILS_H_ */