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path: root/src/soc/amd/stoneyridge/gpio.c
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Diffstat (limited to 'src/soc/amd/stoneyridge/gpio.c')
-rw-r--r--src/soc/amd/stoneyridge/gpio.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/src/soc/amd/stoneyridge/gpio.c b/src/soc/amd/stoneyridge/gpio.c
index 59f283ed5c..088f1990d5 100644
--- a/src/soc/amd/stoneyridge/gpio.c
+++ b/src/soc/amd/stoneyridge/gpio.c
@@ -106,3 +106,32 @@ uint16_t gpio_acpi_pin(gpio_t gpio)
{
return gpio;
}
+
+void gpio_set_interrupt(gpio_t gpio, uint32_t flags)
+{
+ uintptr_t gpio_address = gpio_get_address(gpio);
+ uint32_t reg = read32((void *)gpio_address);
+
+ /* Clear registers that are being updated */
+ reg &= ~(GPIO_TRIGGER_MASK | GPIO_ACTIVE_MASK | GPIO_INTERRUPT_MASK);
+
+ /* Clear any extra bits in the flags */
+ flags &= (GPIO_TRIGGER_MASK | GPIO_ACTIVE_MASK | GPIO_INTERRUPT_MASK);
+
+ write32((void *)gpio_address, reg | flags);
+}
+
+int gpio_interrupt_status(gpio_t gpio)
+{
+ uintptr_t gpio_address = gpio_get_address(gpio);
+ uint32_t reg = read32((void *)gpio_address);
+
+ if (reg & GPIO_INT_STATUS) {
+ /* Clear interrupt status, preserve wake status */
+ reg &= ~GPIO_WAKE_STATUS;
+ write32((void *)gpio_address, reg);
+ return 1;
+ }
+
+ return 0;
+}