[PATCH v2 1/2] gpu: nova-core: register auxiliary device for nova-drm

[Danilo Krummrich <dakr@kernel.org>]

Register an auxiliary device for nova-drm.

For now always use zero for the auxiliary device's ID; we don't use it
yet anyways. However, once it lands, we should switch to XArray.

Signed-off-by: Danilo Krummrich <dakr@kernel.org>
---
 drivers/gpu/nova-core/Kconfig      | 1 +
 drivers/gpu/nova-core/driver.rs    | 9 ++++++++-
 drivers/gpu/nova-core/nova_core.rs | 2 ++
 3 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/nova-core/Kconfig b/drivers/gpu/nova-core/Kconfig
index ad0c06756516..67f99b6a023a 100644
--- a/drivers/gpu/nova-core/Kconfig
+++ b/drivers/gpu/nova-core/Kconfig
@@ -1,5 +1,6 @@
 config NOVA_CORE
 	tristate "Nova Core GPU driver"
+	depends on AUXILIARY_BUS
 	depends on PCI
 	depends on RUST
 	depends on RUST_FW_LOADER_ABSTRACTIONS
diff --git a/drivers/gpu/nova-core/driver.rs b/drivers/gpu/nova-core/driver.rs
index a08fb6599267..8c86101c26cb 100644
--- a/drivers/gpu/nova-core/driver.rs
+++ b/drivers/gpu/nova-core/driver.rs
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 
-use kernel::{bindings, c_str, device::Core, pci, prelude::*};
+use kernel::{auxiliary, bindings, c_str, device::Core, pci, prelude::*};
 
 use crate::gpu::Gpu;
 
@@ -8,6 +8,7 @@
 pub(crate) struct NovaCore {
     #[pin]
     pub(crate) gpu: Gpu,
+    _reg: auxiliary::Registration,
 }
 
 const BAR0_SIZE: usize = 8;
@@ -38,6 +39,12 @@ fn probe(pdev: &pci::Device<Core>, _info: &Self::IdInfo) -> Result<Pin<KBox<Self
         let this = KBox::pin_init(
             try_pin_init!(Self {
                 gpu <- Gpu::new(pdev, bar)?,
+                _reg: auxiliary::Registration::new(
+                    pdev.as_ref(),
+                    c_str!("nova-drm"),
+                    0, // TODO: Once it lands, use XArray; for now we don't use the ID.
+                    crate::MODULE_NAME
+                )?,
             }),
             GFP_KERNEL,
         )?;
diff --git a/drivers/gpu/nova-core/nova_core.rs b/drivers/gpu/nova-core/nova_core.rs
index a91cd924054b..618632f0abcc 100644
--- a/drivers/gpu/nova-core/nova_core.rs
+++ b/drivers/gpu/nova-core/nova_core.rs
@@ -8,6 +8,8 @@
 mod regs;
 mod util;
 
+pub(crate) const MODULE_NAME: &kernel::str::CStr = <LocalModule as kernel::ModuleMetadata>::NAME;
+
 kernel::module_pci_driver! {
     type: driver::NovaCore,
     name: "NovaCore",
-- 
2.49.0