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Message-ID: <20251216-soc-bindings-v3-3-42ecdc8c117e@google.com>
Date: Tue, 16 Dec 2025 19:24:31 +0000
From: Matthew Maurer <mmaurer@...gle.com>
To: Miguel Ojeda <ojeda@...nel.org>, Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
"Björn Roy Baron" <bjorn3_gh@...tonmail.com>, Benno Lossin <lossin@...nel.org>,
Andreas Hindborg <a.hindborg@...nel.org>, Alice Ryhl <aliceryhl@...gle.com>,
Trevor Gross <tmgross@...ch.edu>, Danilo Krummrich <dakr@...nel.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>, "Rafael J. Wysocki" <rafael@...nel.org>
Cc: linux-kernel@...r.kernel.org, rust-for-linux@...r.kernel.org,
Matthew Maurer <mmaurer@...gle.com>
Subject: [PATCH v3 3/3] rust: Add SoC Driver Sample
Shows registration of a SoC device upon receipt of a probe.
Signed-off-by: Matthew Maurer <mmaurer@...gle.com>
---
MAINTAINERS | 1 +
samples/rust/Kconfig | 11 +++++++
samples/rust/Makefile | 1 +
samples/rust/rust_soc.rs | 82 ++++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 95 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index 4ff01fb0f1bda27002094113c0bf9d074d28fdb6..bb2e710277cc84dd6042d4d46076e665d9f68752 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7705,6 +7705,7 @@ F: samples/rust/rust_debugfs.rs
F: samples/rust/rust_debugfs_scoped.rs
F: samples/rust/rust_driver_platform.rs
F: samples/rust/rust_driver_faux.rs
+F: samples/rust/rust_soc.rs
DRIVERS FOR OMAP ADAPTIVE VOLTAGE SCALING (AVS)
M: Nishanth Menon <nm@...com>
diff --git a/samples/rust/Kconfig b/samples/rust/Kconfig
index 3efa51bfc8efccd91d9ee079ccd078ed1a6e8aa7..c49ab910634596aea4a1a73dac87585e084f420a 100644
--- a/samples/rust/Kconfig
+++ b/samples/rust/Kconfig
@@ -161,6 +161,17 @@ config SAMPLE_RUST_DRIVER_AUXILIARY
If unsure, say N.
+config SAMPLE_RUST_SOC
+ tristate "SoC Driver"
+ select SOC_BUS
+ help
+ This option builds the Rust SoC driver sample.
+
+ To compile this as a module, choose M here:
+ the module will be called rust_soc.
+
+ If unsure, say N.
+
config SAMPLE_RUST_HOSTPROGS
bool "Host programs"
help
diff --git a/samples/rust/Makefile b/samples/rust/Makefile
index f65885d1d62bf406b0db13121ef3e5b09829cfbc..6c0aaa58ccccfd12ef019f68ca784f6d977bc668 100644
--- a/samples/rust/Makefile
+++ b/samples/rust/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_SAMPLE_RUST_DRIVER_USB) += rust_driver_usb.o
obj-$(CONFIG_SAMPLE_RUST_DRIVER_FAUX) += rust_driver_faux.o
obj-$(CONFIG_SAMPLE_RUST_DRIVER_AUXILIARY) += rust_driver_auxiliary.o
obj-$(CONFIG_SAMPLE_RUST_CONFIGFS) += rust_configfs.o
+obj-$(CONFIG_SAMPLE_RUST_SOC) += rust_soc.o
rust_print-y := rust_print_main.o rust_print_events.o
diff --git a/samples/rust/rust_soc.rs b/samples/rust/rust_soc.rs
new file mode 100644
index 0000000000000000000000000000000000000000..33043b0ac8dadec36aebf369f0fb68dbb3b118ed
--- /dev/null
+++ b/samples/rust/rust_soc.rs
@@ -0,0 +1,82 @@
+// SPDX-License-Identifier: GPL-2.0
+
+//! Rust SoC Platform driver sample.
+
+use kernel::{
+ acpi,
+ c_str,
+ device::Core,
+ of,
+ platform,
+ prelude::*,
+ soc,
+ str::CString,
+ sync::aref::ARef, //
+};
+use pin_init::pin_init_scope;
+
+#[pin_data]
+struct SampleSocDriver {
+ pdev: ARef<platform::Device>,
+ #[pin]
+ _dev_reg: soc::Registration,
+}
+
+kernel::of_device_table!(
+ OF_TABLE,
+ MODULE_OF_TABLE,
+ <SampleSocDriver as platform::Driver>::IdInfo,
+ [(of::DeviceId::new(c_str!("test,rust-device")), ())]
+);
+
+kernel::acpi_device_table!(
+ ACPI_TABLE,
+ MODULE_ACPI_TABLE,
+ <SampleSocDriver as platform::Driver>::IdInfo,
+ [(acpi::DeviceId::new(c_str!("LNUXBEEF")), ())]
+);
+
+impl platform::Driver for SampleSocDriver {
+ type IdInfo = ();
+ const OF_ID_TABLE: Option<of::IdTable<Self::IdInfo>> = Some(&OF_TABLE);
+ const ACPI_ID_TABLE: Option<acpi::IdTable<Self::IdInfo>> = Some(&ACPI_TABLE);
+
+ fn probe(
+ pdev: &platform::Device<Core>,
+ _info: Option<&Self::IdInfo>,
+ ) -> impl PinInit<Self, Error> {
+ let dev = pdev.as_ref();
+
+ dev_dbg!(dev, "Probe Rust SoC driver sample.\n");
+
+ let pdev = pdev.into();
+ pin_init_scope(move || {
+ let machine = CString::try_from(c_str!("My cool ACME15 dev board"))?;
+ let family = CString::try_from(c_str!("ACME"))?;
+ let revision = CString::try_from(c_str!("1.2"))?;
+ let serial_number = CString::try_from(c_str!("12345"))?;
+ let soc_id = CString::try_from(c_str!("ACME15"))?;
+
+ let attr = soc::Attributes {
+ machine: Some(machine),
+ family: Some(family),
+ revision: Some(revision),
+ serial_number: Some(serial_number),
+ soc_id: Some(soc_id),
+ };
+
+ Ok(try_pin_init!(SampleSocDriver {
+ pdev: pdev,
+ _dev_reg <- soc::Registration::new(attr),
+ }? Error))
+ })
+ }
+}
+
+kernel::module_platform_driver! {
+ type: SampleSocDriver,
+ name: "rust_soc",
+ authors: ["Matthew Maurer"],
+ description: "Rust SoC Driver",
+ license: "GPL",
+}
--
2.52.0.305.g3fc767764a-goog
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