diff options
| author | Karthikeyan Ramasubramanian <kramasub@google.com> | 2020-04-20 13:43:29 -0600 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-05-01 06:10:04 +0000 |
| commit | e0b7a88f586d746c72da1fedfbeda3156faf4d73 (patch) | |
| tree | 28cb7ab20ca3e04f48b24febb2b5ca665a76b066 /src/soc | |
| parent | 3b9d995ecb99063adc2c79bb3c2e73de72499e01 (diff) | |
soc/intel/jasperlake: Add support to generate ACPI GPIO operations
Add support to generate ACPI operations to get/set/clear RX/TX GPIOs.
BUG=b:152936541
TEST=Build and boot the mainboard. Ensure that there are no errors in
the coreboot logs regarding unsupported ACPI GPIO operations.
Change-Id: Ibc4846fbd9baf4f22c48c82acefed960669ed7d4
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40536
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Diffstat (limited to 'src/soc')
| -rw-r--r-- | src/soc/intel/jasperlake/acpi.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/soc/intel/jasperlake/acpi.c b/src/soc/intel/jasperlake/acpi.c index 4acd8a6131..b390968708 100644 --- a/src/soc/intel/jasperlake/acpi.c +++ b/src/soc/intel/jasperlake/acpi.c @@ -330,3 +330,40 @@ 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); +} |