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Questions - sysfs

Windows Driver substitue for linux device driver sysfs interface

Let me describe what sysfs does : its a pseudo file system where files, directories are generated by the core kernel or kernel drivers. And these files have read/write access and are a mechanism to co...
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hit.at.ro

windows

device-driver

sysfs

wdm

wdf

Votes: 0

Answers: 0

What is the default direction and value when a GPIO is exported?

What is the default direction and value when a GPIO is first-time exported? Can I achieve a glitch-free operation using sysfs? I mean "export -> set direction -> set value" in atomic m...
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guan boshen

android

linux

gpio

sysfs

Votes: 0

Answers: 1

Latest Answer

What is the default direction and value when a GPIO is first-time exported? In my experience, like stark stated, default on export was always 'in'. But I don't have the documentation for this. Can ...
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bunto1

Embedded Linux: Adding device file to existing device sysfs class

I am using Linux kernel release 5.4. I have one kernel built-in driver, which creates a sysfs class: /sys/night_owl/tick1/* using class_create() and device_create_file() function. I am developing anot...
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Duy Trần Phạm

embedded-linux

sysfs

Votes: 0

Answers: 0

Passing int to sysfs

I want to pass int to sysfs_store What I tried userspace int tid = 5234; // can be negative as well char buf[5]; sprintf(buf, "%d\n", tid); write (fd, buf, 1); driver sysfs_store int v; kst...
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ruke

c

char

kernel

driver

sysfs

Votes: 0

Answers: 1

Latest Answer

Since sprintf() returns bytes copied count; use it Also switch to snprintf() to avoid buffer overflows. int data_len = snprintf(buf, sizeof(buf), "%d\n", tid); write (fd, buf, data_len); It...
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