drm/nouveau: introduce gpio engine
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nv50_gpio.c b/drivers/gpu/drm/nouveau/nv50_gpio.c
index 88715c5..b2fab2b 100644
--- a/drivers/gpu/drm/nouveau/nv50_gpio.c
+++ b/drivers/gpu/drm/nouveau/nv50_gpio.c
@@ -93,3 +93,19 @@
nv_wr32(dev, reg + 4, mask);
nv_mask(dev, reg + 0, mask, on ? mask : 0);
}
+
+int
+nv50_gpio_init(struct drm_device *dev)
+{
+ struct drm_nouveau_private *dev_priv = dev->dev_private;
+
+ /* disable, and ack any pending gpio interrupts */
+ nv_wr32(dev, 0xe050, 0x00000000);
+ nv_wr32(dev, 0xe054, 0xffffffff);
+ if (dev_priv->chipset >= 0x90) {
+ nv_wr32(dev, 0xe070, 0x00000000);
+ nv_wr32(dev, 0xe074, 0xffffffff);
+ }
+
+ return 0;
+}