Linux kernel regulator subsystem (device tree)
Regulator refers to the stabilizer, there are two kinds of voltage stabilizer and current stabilizer, which can automatically maintain a constant current or voltage. Among them, the voltage regulator voltage regulator is more common in the circuit. From the perspective of device drivers, the control of the regulator is relatively simple, mainly including enable/disable/output voltage or current control. Linux uses the regulator framework to manage and control the regulator.
The main purpose of the Linux regulator framework: to provide a standard kernel interface, control the voltage/current regulators of the system, and provide the corresponding switch and size setting mechanism. During the running of the system, the output of the regulators is dynamically changed according to the specific needs, so as to achieve the purpose of saving power. In the system, if the regulator is misconfigured, it is more dangerous, which may cause damage to the hardware device. The size of the current or voltage is limited in the regulator framework, and cannot be changed by the consumer or provider of the ragulator.
提示：上一篇简单讲述“点灯大师”，本篇简单讲述内核设备树中电源的注册和引用。