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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>
This commit is contained in:
Karthikeyan Ramasubramanian 2020-04-20 13:43:29 -06:00 committed by Patrick Georgi
parent 3b9d995ecb
commit e0b7a88f58
1 changed files with 37 additions and 0 deletions
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37
src/soc/intel/jasperlake/acpi.c
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@ -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);
}