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Diffstat (limited to 'src/arch/x86/acpi_device.c')
-rw-r--r--src/arch/x86/acpi_device.c46
1 files changed, 46 insertions, 0 deletions
diff --git a/src/arch/x86/acpi_device.c b/src/arch/x86/acpi_device.c
index 7cf292fbee..4fe16a138f 100644
--- a/src/arch/x86/acpi_device.c
+++ b/src/arch/x86/acpi_device.c
@@ -490,6 +490,52 @@ void acpi_device_write_spi(const struct acpi_spi *spi)
acpi_device_fill_len(desc_length);
}
+/* PowerResource() with Enable and/or Reset control */
+void acpi_device_add_power_res(
+ struct acpi_gpio *reset, unsigned reset_delay_ms,
+ struct acpi_gpio *enable, unsigned enable_delay_ms)
+{
+ const char *power_res_dev_states[] = { "_PR0", "_PR3" };
+ unsigned reset_gpio = reset->pins[0];
+ unsigned enable_gpio = enable->pins[0];
+
+ if (!reset_gpio && !enable_gpio)
+ return;
+
+ /* PowerResource (PRIC, 0, 0) */
+ acpigen_write_power_res("PRIC", 0, 0, power_res_dev_states,
+ ARRAY_SIZE(power_res_dev_states));
+
+ /* Method (_STA, 0, NotSerialized) { Return (0x1) } */
+ acpigen_write_STA(0x1);
+
+ /* Method (_ON, 0, Serialized) */
+ acpigen_write_method_serialized("_ON", 0);
+ if (reset_gpio)
+ acpigen_soc_set_tx_gpio(reset_gpio);
+ if (enable_gpio) {
+ acpigen_soc_set_tx_gpio(enable_gpio);
+ if (enable_delay_ms)
+ acpigen_write_sleep(enable_delay_ms);
+ }
+ if (reset_gpio) {
+ acpigen_soc_clear_tx_gpio(reset_gpio);
+ if (reset_delay_ms)
+ acpigen_write_sleep(reset_delay_ms);
+ }
+ acpigen_pop_len(); /* _ON method */
+
+ /* Method (_OFF, 0, Serialized) */
+ acpigen_write_method_serialized("_OFF", 0);
+ if (reset_gpio)
+ acpigen_soc_set_tx_gpio(reset_gpio);
+ if (enable_gpio)
+ acpigen_soc_clear_tx_gpio(enable_gpio);
+ acpigen_pop_len(); /* _OFF method */
+
+ acpigen_pop_len(); /* PowerResource PRIC */
+}
+
static void acpi_dp_write_array(const struct acpi_dp *array);
static void acpi_dp_write_value(const struct acpi_dp *prop)
{