From: Markus Probst <markus.probst@posteo.de>
Add a synology microp core driver, written in Rust.
The driver targets a microcontroller found in Synology NAS devices. It
only provides the base for sub-devices, like LEDs.
Tested successfully on a Synology DS923+.
Signed-off-by: Markus Probst <markus.probst@posteo.de>
---
MAINTAINERS | 7 +++++++
drivers/mfd/Kconfig | 11 ++++++++++
drivers/mfd/Makefile | 2 ++
drivers/mfd/synology_microp.rs | 46 ++++++++++++++++++++++++++++++++++++++++++
4 files changed, 66 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index fa49e40836ab..32932ecab9cf 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -25539,6 +25539,13 @@ F: drivers/dma-buf/sync_*
F: include/linux/sync_file.h
F: include/uapi/linux/sync_file.h
+SYNOLOGY MICROP DRIVER
+M: Markus Probst <markus.probst@posteo.de>
+S: Maintained
+F: Documentation/devicetree/bindings/leds/synology,microp.yaml
+F: Documentation/devicetree/bindings/mfd/synology,microp.yaml
+F: drivers/mfd/synology_microp.rs
+
SYNOPSYS ARC ARCHITECTURE
M: Vineet Gupta <vgupta@kernel.org>
L: linux-snps-arc@lists.infradead.org
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 7192c9d1d268..8b8b391d1b47 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1320,6 +1320,17 @@ config MFD_SY7636A
To enable support for building sub-devices as modules,
choose M here.
+config MFD_SYNOLOGY_MICROP
+ tristate "Synology Microp core driver"
+ depends on RUST
+ select RUST_SERIAL_DEV_BUS_ABSTRACTIONS
+ select MFD_CORE
+ help
+ Enable support for the MCU found in Synology NAS devices.
+
+ This driver only provides the base for sub-devices. For additional
+ functionality, you have to enable support for the sub-devices as well.
+
config MFD_RDC321X
tristate "RDC R-321x southbridge"
select MFD_CORE
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index e75e8045c28a..f754be7163cd 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -304,3 +304,5 @@ obj-$(CONFIG_MFD_RSMU_SPI) += rsmu_spi.o rsmu_core.o
obj-$(CONFIG_MFD_UPBOARD_FPGA) += upboard-fpga.o
obj-$(CONFIG_MFD_LOONGSON_SE) += loongson-se.o
+
+obj-$(CONFIG_MFD_SYNOLOGY_MICROP) += synology_microp.o
diff --git a/drivers/mfd/synology_microp.rs b/drivers/mfd/synology_microp.rs
new file mode 100644
index 000000000000..b9b5fff5c18d
--- /dev/null
+++ b/drivers/mfd/synology_microp.rs
@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: GPL-2.0
+
+//! Synology Microp core driver
+
+use kernel::{
+ device,
+ mfd,
+ of,
+ prelude::*,
+ serdev, //
+};
+
+kernel::module_serdev_device_driver! {
+ type: SynologyMicropCoreDriver,
+ name: "synology_microp",
+ authors: ["Markus Probst <markus.probst@posteo.de>"],
+ description: "Synology Microp core driver",
+ license: "GPL v2",
+}
+
+struct SynologyMicropCoreDriver;
+
+kernel::of_device_table!(
+ OF_TABLE,
+ MODULE_OF_TABLE,
+ <SynologyMicropCoreDriver as serdev::Driver>::IdInfo,
+ [(of::DeviceId::new(c"synology,microp"), ()),]
+);
+
+#[vtable]
+impl serdev::Driver for SynologyMicropCoreDriver {
+ type IdInfo = ();
+ const OF_ID_TABLE: Option<of::IdTable<Self::IdInfo>> = Some(&OF_TABLE);
+ const MFD_CELLS: Option<&'static [mfd::Cell]> =
+ Some(&[mfd::Cell::new(c"synology_microp_leds").of(c"synology,microp-leds", None)]);
+
+ fn probe(
+ dev: &serdev::Device<device::Core>,
+ _id_info: Option<&Self::IdInfo>,
+ ) -> impl PinInit<Self, kernel::error::Error> {
+ let _ = dev.set_baudrate(9600);
+ dev.set_flow_control(false);
+ dev.set_parity(serdev::Parity::None)?;
+ Ok(Self)
+ }
+}
--
2.52.0