diff options
Diffstat (limited to 'src/soc/intel/cannonlake/acpi.c')
| -rw-r--r-- | src/soc/intel/cannonlake/acpi.c | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/src/soc/intel/cannonlake/acpi.c b/src/soc/intel/cannonlake/acpi.c index 84dfdad286..4dab3342f7 100644 --- a/src/soc/intel/cannonlake/acpi.c +++ b/src/soc/intel/cannonlake/acpi.c @@ -3,7 +3,7 @@ * * Copyright (C) 2009 coresystems GmbH * Copyright (C) 2014 Google Inc. - * Copyright (C) 2017 Intel Corporation. + * Copyright (C) 2017-2018 Intel Corporation. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -248,3 +248,40 @@ int soc_madt_sci_irq_polarity(int sci) { return MP_IRQ_POLARITY_HIGH; } + +static int acpigen_soc_gpio_op(const char *op, unsigned int gpio_num) +{ + /* op (gpio_num) */ + acpigen_emit_namestring(op); + acpigen_write_integer(gpio_num); + return 0; +} + +static int acpigen_soc_get_gpio_state(const char *op, unsigned int gpio_num) +{ + /* Store (op (gpio_num), Local0) */ + acpigen_write_store(); + acpigen_soc_gpio_op(op, gpio_num); + acpigen_emit_byte(LOCAL0_OP); + return 0; +} + +int acpigen_soc_read_rx_gpio(unsigned int gpio_num) +{ + return acpigen_soc_get_gpio_state("\\_SB.PCI0.GRXS", gpio_num); +} + +int acpigen_soc_get_tx_gpio(unsigned int gpio_num) +{ + return acpigen_soc_get_gpio_state("\\_SB.PCI0.GTXS", gpio_num); +} + +int acpigen_soc_set_tx_gpio(unsigned int gpio_num) +{ + return acpigen_soc_gpio_op("\\_SB.PCI0.STXS", gpio_num); +} + +int acpigen_soc_clear_tx_gpio(unsigned int gpio_num) +{ + return acpigen_soc_gpio_op("\\_SB.PCI0.CTXS", gpio_num); +} |