New PWM Subsystem

Zack’s Kernel News

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Chronicler Zack Brown reports on the latest news, views, dilemmas, and developments within the Linux kernel community.

The new PWM subsystem almost got derailed when Thierry Reding submitted it to Linus Torvalds to be included in the main kernel tree.

The PWM (pulse width modulation) subsystem specializes in changing the widths of rectangular pulse waves, as a way of controlling the power of the signal. It’s useful in minor, unimportant ways like controlling the fans that prevent your computer from melting into sludge and backlights that let you see what you’re working on.

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