acpi

问题 I need help on this, my driver already work on device tree mode, and I want support acpi mode for it, I'm stuck on create partitions: Device Tree: &spi0 { status = "ok"; flash: n25q256a@0 { status = "ok"; cell-index = <0>; #address-cells = <1>; #size-cells = <1>; compatible = "n25q256a"; reg = <0>; spi-max-frequency = <15000000>; spi-cpha; spi-cpol; partition@0x00000000 { label = "Boot loader"; reg = <0x00000000 0x01000000>; }; partition@0x01000000 { label = "n25q256a-test"; reg = <0x01000000

来源： https://stackoverflow.com/questions/63519678/how-should-i2c-drivers-be-matched-in-acpi-with-hid-prp0001

来源： https://stackoverflow.com/questions/63490765/how-does-one-declare-devices-behind-muxes-in-acpi

问题 I am attempting to utilize the DLN-2 in an x86_64 Linux environment (kernel version 4.18) to provide SPI and I2C bus controllers to the userspace, in a similar manner you would using an ARM platform with DTS/DTB file modifications. I am having trouble identifying the proper method to attach a SPI slave device or mount the device to userspace with the spidev driver. The kernel modules are loading successfully and the SPI bus is mounted as a spi_master. I am certain the chip itself is working

问题 now I want to add the function in my acpi driver . the function is:get the BIOS Notify . I search some doc, And Write code NTSTATUS XxxAddDevice( __in struct _DRIVER_OBJECT *DriverObject, __in struct _DEVICE_OBJECT *PhysicalDeviceObject ) { . . . status = STATUS_SUCCESS; DebugPrint(("AddDevice: %p to %p->%p \n",fdo,fdoData->NextLowerDO,PhysicalDeviceObject)); DebugPrint(("DeviceObject Flag = 0x%08x\n",fdo->Flags)); DebugPrint(("DevicePnPState = %d\n", fdoData->DevicePnPState)); { //PACPI

问题 We can declare platform device information in dts file, rather than hard coding every data into operating system. Taking "arm" architecture as example. it supports dts and we will take dts from arch/arm/boot/dts/xx.dts. Convert this xx.dts into xx.dtb and loaded with kernel Image. I recently came across ACPI, when i came across x86 architecture, from the documents, what i understood is ACPI is similar to device tree. We can declare platform device information information in ACPI tables, my

问题 I want to get information about the battery in C on linux. I don't want to read or parse any file! Is there any low-level interface to acpi/the kernel or any other module to get the information I want to have? I already searched the web, but every question results in the answer "parse /proc/foo/bar". I really don't want to do this because I think, low-level interfaces won't change as fast as Files do. best regards. 回答1: You might be looking for UPower: http://upower.freedesktop.org/ This is a

问题 I have MS-DOS 6.22 running on a Pentium based computer (motherboard supports ACPI), and would like to know if there was an assembly language routine I could use to shut down the computer, or is it a little harder than that (i.e. motherboard specific)? Basically, I want to create a small program to shut down the computer from the command line. 回答1: Here is an example of a tool written specifically for this: http://www.plop.at/en/dostoolsdl.html The source code can be found here: http:/

问题 I wanna control fan speed by C#. I tried WMI but it does not work for me :/ I have HP ProBook with Intel Core i5, Windows 7 HomePremium 64-bit. Is there any other way how to control fan speed (get temperature, set fan speed to higher or lower value or disable/enable it)? 回答1: Im trying to accomplish the same for a Dell Optiplex 740. Speed Fan also doesnt work for me. The funny part is that when i looked for a way to overclock my Graphic Card i found out under evga.com a way to change my CPU

问题 I've a netbook that is running the fan a bit to early for my liking. I've found a Windows-only solution to reducing the fan noise but I'm using Ubuntu on this computer. In the Windows solution the guy is using a program called Notebook Hardware Control (NHC) which, from what I can make out, is reading and setting ACPI values. (http://hpmini110c.siteboard.eu/f3t31-lueftersteuerung-fuer-den-mini.html, relevant source in the 7z-file, the .cs-file in there is a C#-file with the logic for setting