diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/acpi/gpio.md | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/acpi/gpio.md b/Documentation/acpi/gpio.md index d42042f36f..abde3a0d3d 100644 --- a/Documentation/acpi/gpio.md +++ b/Documentation/acpi/gpio.md @@ -73,6 +73,15 @@ calling the platform specific acpigen_soc_{set,clear}_tx_gpio functions internally. Thus, all the ACPI AML calling conventions for the platform functions apply to these helper functions as well. +3. Get Rx GPIO + int acpigen_get_rx_gpio(struct acpi_gpio gpio) + +This function takes as input, an struct acpi_gpio type and outputs +AML code to read the *logical* value of a gpio (after taking its +polarity into consideration), into the Local0 variable. It calls +the platform specific acpigen_soc_read_rx_gpio() to actually read +the raw Rx gpio value. + ## Implementation Details ACPI library in coreboot will provide weak definitions for all the |