diff options
| -rw-r--r-- | Documentation/acpi/devicetree.md | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/Documentation/acpi/devicetree.md b/Documentation/acpi/devicetree.md index e8680e359f..f121698ed5 100644 --- a/Documentation/acpi/devicetree.md +++ b/Documentation/acpi/devicetree.md @@ -30,7 +30,7 @@ device pci 15.0 on chip drivers/i2c/generic register "hid" = ""ELAN0000"" register "desc" = ""ELAN Touchpad"" - register "irq" = "ACPI_IRQ_WAKE_EDGE_LOW(GPP_A21_IRQ)" + register "irq" = "ACPI_IRQ_WAKE_LEVEL_LOW(GPP_A21_IRQ)" register "wake" = "GPE0_DW0_21" device i2c 15 on end end @@ -60,7 +60,7 @@ Scope (\_SB.PCI0.I2C0) I2cSerialBusV2 (0x0015, ControllerInitiated, 400000, AddressingMode7Bit, "\\_SB.PCI0.I2C0", 0x00, ResourceConsumer, , Exclusive, ) - Interrupt (ResourceConsumer, Edge, ActiveLow, ExclusiveAndWake, ,, ) + Interrupt (ResourceConsumer, Level, ActiveLow, ExclusiveAndWake, ,, ) { 0x0000002D, } @@ -136,7 +136,7 @@ corresponds to **const char *desc** and in ASL: It also adds the interrupt, ``` - Interrupt (ResourceConsumer, Edge, ActiveLow, ExclusiveAndWake, ,, ) + Interrupt (ResourceConsumer, Level, ActiveLow, ExclusiveAndWake, ,, ) { 0x0000002D, } @@ -145,15 +145,15 @@ It also adds the interrupt, which comes from: ``` - register "irq" = "ACPI_IRQ_WAKE_EDGE_LOW(GPP_A21_IRQ)" + register "irq" = "ACPI_IRQ_WAKE_LEVEL_LOW(GPP_A21_IRQ)" ``` -The GPIO pin IRQ settings control the "Edge", "ActiveLow", and -"ExclusiveAndWake" settings seen above (edge means it is an edge-triggered -interrupt as opposed to level-triggered; active low means the interrupt is -triggered on a falling edge). +The GPIO pin IRQ settings control the "Level", "ActiveLow", and +"ExclusiveAndWake" settings seen above (level means it is a level-triggered +interrupt as opposed to edge-triggered; active low means the interrupt is +triggered when the signal is low). -Note that the ACPI_IRQ_WAKE_EDGE_LOW macro informs the platform that the GPIO +Note that the ACPI_IRQ_WAKE_LEVEL_LOW macro informs the platform that the GPIO will be routed through SCI (ACPI's System Control Interrupt) for use as a wake source. Also note that the IRQ names are SoC-specific, and you will need to find the names in your SoC's header file. The ACPI_* macros are defined in |