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dm: core: Add a way of overriding the ACPI device path

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Some devices such as GPIO need to override the normal path that would be
generated by driver model. Add a device-tree property for this.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
This commit is contained in:
Simon Glass
2020-07-07 21:32:07 -06:00
committed by Bin Meng
parent f02d0eb3fa
commit f18589576c
3 changed files with 55 additions and 0 deletions
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23
doc/device-tree-bindings/device.txt
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@@ -17,6 +17,8 @@ the acpi,compatible property.
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
@@ -47,3 +49,24 @@ pcie-a0@14,0 {
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";
};
};