mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-12 16:07:30 +00:00
e4f09f97c9
Some devices can wake the system from sleep, e.g opening the lid on a clamshell or moving a USB mouse. Add a wake to specify this for USB devices and add the settings for Apollo Lake. Signed-off-by: Simon Glass <sjg@chromium.org>
75 lines
2.3 KiB
Text
75 lines
2.3 KiB
Text
Devices
|
|
=======
|
|
|
|
Device bindings are described by their own individual binding files.
|
|
|
|
U-Boot provides for some optional properties which are documented here. See
|
|
also hid-over-i2c.txt which describes HID devices. See also
|
|
Documentation/firmware-guide/acpi/enumeration.rst in the Linux kernel for
|
|
the acpi,compatible property.
|
|
|
|
- acpi,has-power-resource : (boolean) true if this device has a power resource.
|
|
This causes an ACPI PowerResource to be written containing the properties
|
|
provided by this binding, to describe how to handle powering the device up
|
|
and down using GPIOs
|
|
- acpi,compatible : compatible string to report
|
|
- acpi,ddn : Contains the string to use as the _DDN (DOS (Disk Operating
|
|
System) Device Name)
|
|
- acpi,hid : Contains the string to use as the HID (Hardware ID)
|
|
identifier _HID
|
|
- acpi,path : Specifies the full ACPI path for a device. This overrides the
|
|
normal path built from the driver-model hierarchy
|
|
- acpi,name : Provides the ACPI name for a device, which is a string consisting
|
|
of four alphanumeric character (upper case)
|
|
- acpi,uid : _UID value for device
|
|
- acpi,wake : Provides the GPE used to detect a request from a device to wake
|
|
from sleep
|
|
- linux,probed : Tells U-Boot to add 'linux,probed' to the ACPI tables so that
|
|
Linux will only load the driver if the device can be detected (e.g. on I2C
|
|
bus). Note that this is an out-of-tree Linux feature.
|
|
|
|
|
|
Example
|
|
-------
|
|
|
|
elan_touchscreen: elan-touchscreen@10 {
|
|
compatible = "i2c-chip";
|
|
reg = <0x10>;
|
|
acpi,hid = "ELAN0001";
|
|
acpi,ddn = "ELAN Touchscreen";
|
|
interrupts-extended = <&acpi_gpe GPIO_21_IRQ IRQ_TYPE_EDGE_FALLING>;
|
|
linux,probed;
|
|
};
|
|
|
|
pcie-a0@14,0 {
|
|
reg = <0x0000a000 0 0 0 0>;
|
|
acpi,name = "RP01";
|
|
wifi: wifi {
|
|
compatible = "intel,generic-wifi";
|
|
acpi,ddn = "Intel WiFi";
|
|
acpi,name = "WF00";
|
|
acpi,wake = <GPE0_DW3_00>;
|
|
interrupts-extended = <&acpi_gpe 0x3c 0>;
|
|
};
|
|
};
|
|
|
|
p2sb: p2sb@d,0 {
|
|
u-boot,dm-pre-reloc;
|
|
reg = <0x02006810 0 0 0 0>;
|
|
compatible = "intel,apl-p2sb";
|
|
early-regs = <IOMAP_P2SB_BAR 0x100000>;
|
|
pci,no-autoconfig;
|
|
|
|
n {
|
|
compatible = "intel,apl-pinctrl";
|
|
u-boot,dm-pre-reloc;
|
|
intel,p2sb-port-id = <PID_GPIO_N>;
|
|
acpi,path = "\\_SB.GPO0";
|
|
gpio_n: gpio-n {
|
|
compatible = "intel,gpio";
|
|
u-boot,dm-pre-reloc;
|
|
gpio-controller;
|
|
#gpio-cells = <2>;
|
|
linux-name = "INT3452:00";
|
|
};
|
|
};
|