diff options
Diffstat (limited to 'src/arch/x86/acpigen.c')
| -rw-r--r-- | src/arch/x86/acpigen.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/arch/x86/acpigen.c b/src/arch/x86/acpigen.c index 8ebdd0982c..d3ec05fe3d 100644 --- a/src/arch/x86/acpigen.c +++ b/src/arch/x86/acpigen.c @@ -1299,3 +1299,26 @@ int __attribute__((weak)) acpigen_soc_clear_tx_gpio(unsigned int gpio_num) acpigen_write_debug_string("clear_tx_gpio not available"); return -1; } + +/* + * Helper functions for enabling/disabling Tx GPIOs based on the GPIO + * polarity. These functions end up calling acpigen_soc_{set,clear}_tx_gpio to + * make callbacks into SoC acpigen code. + * + * Returns 0 on success and -1 on error. + */ +int acpigen_enable_tx_gpio(struct acpi_gpio *gpio) +{ + if (gpio->polarity == ACPI_GPIO_ACTIVE_HIGH) + return acpigen_soc_set_tx_gpio(gpio->pins[0]); + else + return acpigen_soc_clear_tx_gpio(gpio->pins[0]); +} + +int acpigen_disable_tx_gpio(struct acpi_gpio *gpio) +{ + if (gpio->polarity == ACPI_GPIO_ACTIVE_LOW) + return acpigen_soc_set_tx_gpio(gpio->pins[0]); + else + return acpigen_soc_clear_tx_gpio(gpio->pins[0]); +} |