[S] Change in coreboot[main]: acpi: Add method write _PRW using GPIO

[Kapil Porwal (Code Review)]

Kapil Porwal has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/87130?usp=email )

Change subject: acpi: Add method write _PRW using GPIO
......................................................................

acpi: Add method write _PRW using GPIO

Change-Id: I35c717f5996d2b0110bff93221e35e44169e4154
Signed-off-by: Kapil Porwal 
---
M src/acpi/device.c
M src/include/acpi/acpi_device.h
2 files changed, 27 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/30/87130/1

diff --git a/src/acpi/device.c b/src/acpi/device.c
index af3d262..66c8abb 100644
--- a/src/acpi/device.c
+++ b/src/acpi/device.c
@@ -435,6 +435,30 @@
    acpi_device_fill_len(desc_length);
 }

+/* ACPI 6.1 section 7.3.13 _PRW (Power Resources for Wake) */
+void acpigen_write_gpio_PRW(const struct acpi_gpio *gpio, u32 level)
+{
+	if (!gpio || gpio->type != ACPI_GPIO_TYPE_INTERRUPT)
+		return;
+
+	/*
+	 * Name (_PRW, Package () { Package () { path, index }, level })
+	 */
+	acpigen_write_name("_PRW");
+	acpigen_write_package(2);
+	acpigen_write_package(2);
+#if CONFIG(GENERIC_GPIO_LIB)
+	acpigen_emit_string(gpio->resource ? : gpio_acpi_path(gpio->pins[0]));
+	acpigen_write_integer(gpio_acpi_pin(gpio->pins[0]));
+#else
+	acpigen_emit_string(gpio->resource);
+	acpigen_write_integer(gpio->pins[0]);
+#endif
+	acpigen_pop_len();
+	acpigen_write_integer(level);
+	acpigen_pop_len();
+}
+
 /* ACPI 6.1 section 6.4.3.8.2.1 - I2cSerialBus() */
 void acpi_device_write_i2c(const struct acpi_i2c *i2c)
 {
diff --git a/src/include/acpi/acpi_device.h b/src/include/acpi/acpi_device.h
index 3b66989..ad7c822 100644
--- a/src/include/acpi/acpi_device.h
+++ b/src/include/acpi/acpi_device.h
@@ -280,6 +280,9 @@
 /* Write GpioIo() or GpioInt() descriptor to SSDT AML output */
 void acpi_device_write_gpio(const struct acpi_gpio *gpio);

+/* Write _PRW with a GPIO to SSDT AML output */
+void acpigen_write_gpio_PRW(const struct acpi_gpio *gpio, u32 level);
+
 /*
  * ACPI Descriptors for Serial Bus interfaces
  */