kernel regulator

内核调节器（Kernel Regulator）是一种用于控制电源管理的硬件或软件组件。它的作用是在嵌入式系统中调节和管理处理器和外围设备的电源供给，以确保系统的稳定运行和效率。

内核调节器通常由硬件和软件两部分组成。硬件部分通常是一个电源管理集成电路（PMIC），它负责为处理器和外围设备提供合适的电压和电流。软件部分则是由操作系统内核中的驱动程序和电源管理框架组成，它们负责控制和调节PMIC的工作模式和输出参数。

内核调节器的工作原理是根据系统的负载情况和能耗需求，动态调整处理器和外围设备的电源供给参数。例如，在系统空闲时可以降低处理器的工作频率和电压，以节省能源并降低发热，而在系统负载增加时可以提高电压和频率，以确保系统的性能和响应速度。

内核调节器在嵌入式系统中起着至关重要的作用，可以有效地管理系统的能耗和热量，提高系统的续航时间，同时可以保证系统的稳定性和可靠性。它也是现代智能手机、平板电脑和其他移动设备中不可或缺的组件之一。

相关问题

max20087 regulator linux driver

As an AI language model, I don't have access to specific code or driver implementations. However, I can provide you with some general information about the max20087 regulator and its Linux driver.

The MAX20087 is a high-voltage, low-quiescent current linear regulator that can operate with input voltages up to 60V. It provides a fixed output voltage and is suitable for use in a wide range of applications, including automotive, industrial, and communications systems.

In Linux, the MAX20087 regulator is supported by the max20087 driver, which is included in the mainline kernel since version 5.14. The driver provides a sysfs interface that allows users to control the regulator's voltage and enable/disable it.

To use the max20087 regulator driver, you need to enable the CONFIG_REGULATOR_MAX20087 kernel configuration option and build the driver as a loadable module or built-in. Once the driver is loaded, you can access the regulator through the sysfs interface (/sys/class/regulator/regulatorX), where X is the regulator's ID.

You can also use the regulator framework in your application code to interact with the max20087 regulator driver. The framework provides a set of functions and data structures that simplify the process of working with regulators in Linux.

Overall, the max20087 regulator driver is a straightforward and easy-to-use component of the Linux kernel that provides reliable voltage regulation for a wide range of applications.

devm_regulator_get

devm_regulator_get is a function provided by the Linux kernel API that allows a device driver to obtain a reference to a regulator device. This function is a managed version of the regulator_get function, which means that it automatically handles the deallocation of the regulator device when the driver is unloaded from the system.

The devm_regulator_get function takes two arguments: a pointer to the device structure of the device that requires the regulator, and a string that specifies the name of the regulator device. The function returns a pointer to the regulator device structure if successful, or an error code if it fails.

Once a driver obtains a reference to a regulator device using devm_regulator_get, it can use the regulator API functions to control the voltage or current supplied to the device. The driver should release the reference to the regulator device when it is no longer needed, but this is handled automatically by devm_regulator_get.