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arch/x86/acpigen: Add new helper routines for XOR and get_rx_gpio

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Add new helper function in the acpigen library, that use the underlying
soc routines.

Change-Id: I8d65699d3c806007a50adcb51c5d84567ce451b7
Signed-off-by: Rajat Jain <rajatja@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39145
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Mathew King <mathewk@chromium.org>
This commit is contained in:
Rajat Jain
2020-02-26 11:02:53 -08:00
committed by Patrick Georgi
parent 4d9dd22bd1
commit 310623b2dd
3 changed files with 36 additions and 0 deletions
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9
Documentation/acpi/gpio.md
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@@ -73,6 +73,15 @@ calling the platform specific acpigen_soc_{set,clear}_tx_gpio
functions internally. Thus, all the ACPI AML calling conventions for
the platform functions apply to these helper functions as well.
3. Get Rx GPIO
int acpigen_get_rx_gpio(struct acpi_gpio gpio)
This function takes as input, an struct acpi_gpio type and outputs
AML code to read the *logical* value of a gpio (after taking its
polarity into consideration), into the Local0 variable. It calls
the platform specific acpigen_soc_read_rx_gpio() to actually read
the raw Rx gpio value.
## Implementation Details
ACPI library in coreboot will provide weak definitions for all the