diff options
Diffstat (limited to 'src/arch/x86')
| -rw-r--r-- | src/arch/x86/acpigen.c | 29 | ||||
| -rw-r--r-- | src/arch/x86/include/arch/acpigen.h | 22 |
2 files changed, 51 insertions, 0 deletions
diff --git a/src/arch/x86/acpigen.c b/src/arch/x86/acpigen.c index e0e957a9df..0a572630a1 100644 --- a/src/arch/x86/acpigen.c +++ b/src/arch/x86/acpigen.c @@ -992,3 +992,32 @@ void acpigen_write_else(void) acpigen_emit_byte(ELSE_OP); acpigen_write_len_f(); } + +/* Soc-implemented functions -- weak definitions. */ +int __attribute__((weak)) acpigen_soc_read_rx_gpio(unsigned int gpio_num) +{ + printk(BIOS_ERR, "ERROR: %s not implemented\n", __func__); + acpigen_write_debug_string("read_rx_gpio not available"); + return -1; +} + +int __attribute__((weak)) acpigen_soc_get_tx_gpio(unsigned int gpio_num) +{ + printk(BIOS_ERR, "ERROR: %s not implemented\n", __func__); + acpigen_write_debug_string("get_tx_gpio not available"); + return -1; +} + +int __attribute__((weak)) acpigen_soc_set_tx_gpio(unsigned int gpio_num) +{ + printk(BIOS_ERR, "ERROR: %s not implemented\n", __func__); + acpigen_write_debug_string("set_tx_gpio not available"); + return -1; +} + +int __attribute__((weak)) acpigen_soc_clear_tx_gpio(unsigned int gpio_num) +{ + printk(BIOS_ERR, "ERROR: %s not implemented\n", __func__); + acpigen_write_debug_string("clear_tx_gpio not available"); + return -1; +} diff --git a/src/arch/x86/include/arch/acpigen.h b/src/arch/x86/include/arch/acpigen.h index c2936e2aa9..0c515da242 100644 --- a/src/arch/x86/include/arch/acpigen.h +++ b/src/arch/x86/include/arch/acpigen.h @@ -160,4 +160,26 @@ void acpigen_write_else(void); int get_cst_entries(acpi_cstate_t **); +/* + * Soc-implemented functions for generating ACPI AML code for GPIO handling. All + * these functions are expected to use only Local5, Local6 and Local7 + * variables. If the functions call into another ACPI method, then there is no + * restriction on the use of Local variables. In case of get/read functions, + * return value is expected to be stored in Local0 variable. + * + * All functions return 0 on success and -1 on error. + */ + +/* Generate ACPI AML code to return Rx value of GPIO in Local0. */ +int acpigen_soc_read_rx_gpio(unsigned int gpio_num); + +/* Generate ACPI AML code to return Tx value of GPIO in Local0. */ +int acpigen_soc_get_tx_gpio(unsigned int gpio_num); + +/* Generate ACPI AML code to set Tx value of GPIO to 1. */ +int acpigen_soc_set_tx_gpio(unsigned int gpio_num); + +/* Generate ACPI AML code to set Tx value of GPIO to 0. */ +int acpigen_soc_clear_tx_gpio(unsigned int gpio_num); + #endif |