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authorBamvor Jian Zhang <bamvor.zhangjian@linaro.org>2016-08-31 11:45:46 +0200
committerLinus Walleij <linus.walleij@linaro.org>2016-09-26 11:47:14 -0700
commit0f98dd1b27d27412af3aef6a49ea6975988e33e7 (patch)
treea26a7625f099135f2849cd5fdc86c75626fe518b /Documentation/kernel-parameters.txt
parente3296f19c8620a9c47b6734df84c4b3126d2fe46 (diff)
downloadlinux-aarch64-0f98dd1b27d27412af3aef6a49ea6975988e33e7.tar.gz
gpio/mockup: add virtual gpio device
This patch add basic structure of a virtual gpio device(gpio-mockup) for testing gpio subsystem. The tester could manipulate such device through userspace(sysfs or char device) and check the result from debugfs. Currently, it support one or more gpiochip(determined by module parameters with base,ngpio pair). One could test the overlap of different gpiochip and test the direction and/or output values of these chips. Signed-off-by: Kamlakant Patel <kamlakant.patel@broadcom.com> Signed-off-by: Bamvor Jian Zhang <bamvor.zhangjian@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'Documentation/kernel-parameters.txt')
-rw-r--r--Documentation/kernel-parameters.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 46c030a49186..61f4dbf9d97e 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1364,6 +1364,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
Format: <unsigned int> such that (rxsize & ~0x1fffc0) == 0.
Default: 1024
+ gpio-mockup.gpio_mockup_ranges
+ [HW] Sets the ranges of gpiochip of for this device.
+ Format: <start1>,<end1>,<start2>,<end2>...
+
hardlockup_all_cpu_backtrace=
[KNL] Should the hard-lockup detector generate
backtraces on all cpus.