diff options
Diffstat (limited to 'doc/device-tree-bindings')
| -rw-r--r-- | doc/device-tree-bindings/chosen.txt | 18 | ||||
| -rw-r--r-- | doc/device-tree-bindings/device.txt | 3 | ||||
| -rw-r--r-- | doc/device-tree-bindings/i2c/generic-acpi.txt | 42 |
3 files changed, 63 insertions, 0 deletions
diff --git a/doc/device-tree-bindings/chosen.txt b/doc/device-tree-bindings/chosen.txt index d4dfc05847b..e5ba6720ce1 100644 --- a/doc/device-tree-bindings/chosen.txt +++ b/doc/device-tree-bindings/chosen.txt @@ -143,3 +143,21 @@ This provides the ordering to use when writing device data to the ACPI SSDT node to add. The ACPI information is written in this order. If the ordering does not include all nodes, an error is generated. + +e820-entries +------------ + +This provides a way to add entries to the e820 table which tells the OS about +the memory map. The property contains three sets of 64-bit values: + + address - Start address of region + size - Size of region + flags - Flags (E820_...) + +Example: + +chosen { + e820-entries = /bits/ 64 < + IOMAP_P2SB_BAR IOMAP P2SB_SIZE E820_RESERVED + MCH_BASE_ADDRESS MCH_SIZE E820_RESERVED>; +}; diff --git a/doc/device-tree-bindings/device.txt b/doc/device-tree-bindings/device.txt index 2a5736c5981..73ce2a3b5b5 100644 --- a/doc/device-tree-bindings/device.txt +++ b/doc/device-tree-bindings/device.txt @@ -22,6 +22,8 @@ the acpi,compatible property. - 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. @@ -46,6 +48,7 @@ pcie-a0@14,0 { compatible = "intel,generic-wifi"; acpi,ddn = "Intel WiFi"; acpi,name = "WF00"; + acpi,wake = <GPE0_DW3_00>; interrupts-extended = <&acpi_gpe 0x3c 0>; }; }; diff --git a/doc/device-tree-bindings/i2c/generic-acpi.txt b/doc/device-tree-bindings/i2c/generic-acpi.txt new file mode 100644 index 00000000000..3510a71b570 --- /dev/null +++ b/doc/device-tree-bindings/i2c/generic-acpi.txt @@ -0,0 +1,42 @@ +I2C generic device +================== + +This is used only to generate ACPI tables for an I2C device. + +Required properties : + + - compatible : "i2c-chip"; + - reg : I2C chip address + - acpi,hid : HID name for the device + +Optional properies in addition to device.txt: + + - reset-gpios : GPIO used to assert reset to the device + - irq-gpios : GPIO used for interrupt (if Interrupt is not used) + - stop-gpios : GPIO used to stop the device + - interrupts-extended : Interrupt to use for the device + - reset-delay-ms : Delay after de-asserting reset, in ms + - reset-off-delay-ms : Delay after asserting reset (during power off) + - enable-delay-ms : Delay after asserting enable + - enable-off-delay-ms : Delay after de-asserting enable (during power off) + - stop-delay-ms : Delay after de-aserting stop + - stop-off-delay-ms : Delay after asserting stop (during power off) + - hid-descr-addr : HID register offset (for Human Interface Devices) + +Example +------- + + 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; + reset-gpios = <&gpio_n GPIO_36 GPIO_ACTIVE_HIGH>; + reset-delay-ms = <20>; + enable-gpios = <&gpio_n GPIO_152 GPIO_ACTIVE_HIGH>; + enable-delay-ms = <1>; + acpi,has-power-resource; + }; |