[Qemu-devel] [PATCH 2/7] hw/arm/virt-acpi-build: Add GPIO controller in ACPI DSDT table

[shannon . zhao]

From: Shannon Zhao <address@hidden>

Add GPIO controller in ACPI DSDT table. It can be used
for gpio event.

Signed-off-by: Shannon Zhao <address@hidden>
Signed-off-by: Shannon Zhao <address@hidden>
---
 hw/arm/virt-acpi-build.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index b3f27d0..e505c16 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -301,6 +301,24 @@ static void acpi_dsdt_add_pci(Aml *scope, VirtAcpiPcieInfo 
*info, int pcie_irq)
     aml_append(scope, dev);
 }
 
+static void acpi_dsdt_add_gpio(Aml *scope, const MemMapEntry *gpio_memmap,
+                                           int gpio_irq)
+{
+    Aml *dev = aml_device("GPO0");
+    aml_append(dev, aml_name_decl("_HID", aml_string("LNRO0009")));
+    aml_append(dev, aml_name_decl("_ADR", aml_int(0)));
+    aml_append(dev, aml_name_decl("_UID", aml_int(0)));
+
+    Aml *crs = aml_resource_template();
+    aml_append(crs, aml_memory32_fixed(gpio_memmap->base,
+                                       gpio_memmap->size, aml_ReadWrite));
+    aml_append(crs,
+               aml_interrupt(aml_consumer, aml_edge, aml_active_high,
+               aml_exclusive, aml_not_wake_capable, gpio_irq + 32));
+    aml_append(dev, aml_name_decl("_CRS", crs));
+    aml_append(scope, dev);
+}
+
 /* RSDP */
 static GArray *
 build_rsdp(GArray *rsdp_table, GArray *linker, unsigned rsdt)
@@ -456,6 +474,7 @@ build_dsdt(GArray *table_data, GArray *linker, 
VirtGuestInfo *guest_info)
     acpi_dsdt_add_virtio(scope, &memmap[VIRT_MMIO],
                                 irqmap[VIRT_MMIO], NUM_VIRTIO_TRANSPORTS);
     acpi_dsdt_add_pci(scope, guest_info->pcie_info, irqmap[VIRT_PCIE]);
+    acpi_dsdt_add_gpio(scope, &memmap[VIRT_GPIO], irqmap[VIRT_GPIO]);
 
     aml_append(dsdt, scope);
 
-- 
2.1.0