Add driver for the Lenovo ThinkEdge SE10 LED.
This driver supports controlling the red LED located on the front panel of the
Lenovo SE10 hardware. Additionally, it supports the hardware-triggered
functionality of the LED, which by default is tied to the WWAN trigger.
The driver is written in Rust and adds basic LED support for the SE10 platform.
Signed-off-by: Fiona Behrens <me@xxxxxxxxxx>
---
drivers/leds/Kconfig | 10 +++
drivers/leds/Makefile | 1 +
drivers/leds/leds_lenovo_se10.rs | 132 +++++++++++++++++++++++++++++++
3 files changed, 143 insertions(+)
create mode 100644 drivers/leds/leds_lenovo_se10.rs
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index b784bb74a837..89d9e98189d6 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -223,6 +223,16 @@ config LEDS_TURRIS_OMNIA
side of CZ.NIC's Turris Omnia router. There are 12 RGB LEDs on the
front panel.
+config LEDS_LENOVO_SE10
+ tristate "LED support for Lenovo ThinkEdge SE10"
+ depends on RUST
+ depends on (X86 && DMI) || COMPILE_TEST
+ depends on HAS_IOPORT
+ imply LEDS_TRIGGERS
+ help
+ This option enables basic support for the LED found on the front of
+ Lenovo's SE10 ThinkEdge. There is one user controlable LED on the front panel.
+
config LEDS_LM3530
tristate "LCD Backlight driver for LM3530"
depends on LEDS_CLASS
diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
index 18afbb5a23ee..2cff22cbafcf 100644
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -37,6 +37,7 @@ obj-$(CONFIG_LEDS_IP30) += leds-ip30.o
obj-$(CONFIG_LEDS_IPAQ_MICRO) += leds-ipaq-micro.o
obj-$(CONFIG_LEDS_IS31FL319X) += leds-is31fl319x.o
obj-$(CONFIG_LEDS_IS31FL32XX) += leds-is31fl32xx.o
+obj-$(CONFIG_LEDS_LENOVO_SE10) += leds_lenovo_se10.o
obj-$(CONFIG_LEDS_LM3530) += leds-lm3530.o
obj-$(CONFIG_LEDS_LM3532) += leds-lm3532.o
obj-$(CONFIG_LEDS_LM3533) += leds-lm3533.o
diff --git a/drivers/leds/leds_lenovo_se10.rs b/drivers/leds/leds_lenovo_se10.rs
new file mode 100644
index 000000000000..d704125610a4
--- /dev/null
+++ b/drivers/leds/leds_lenovo_se10.rs
@@ -0,0 +1,132 @@
+// SPDX-License-Identifier: GPL-2.0
+//! LED driver for Lenovo ThinkEdge SE10.
+
+use kernel::ioport::{Region, ResourceSize};
+#[cfg(CONFIG_LEDS_TRIGGERS)]
+use kernel::leds::triggers;
+use kernel::leds::{Led, LedConfig, Operations};
+use kernel::prelude::*;
+use kernel::time::Delta;
+use kernel::{c_str, dmi_device_table};
+
+module! {
+ type: SE10,
+ name: "leds_lenovo_se10",
+ author: "Fiona Behrens <me@xxxxxxxxxx>",
+ description: "LED driver for Lenovo ThinkEdge SE10",
+ license: "GPL",
+}
+
+dmi_device_table!(5, SE10_DMI_TABLE, [
+ "LENOVO-SE10": [SysVendor: "LENOVO", ProductName: "12NH"],
+ "LENOVO-SE10": [SysVendor: "LENOVO", ProductName: "12NJ"],
+ "LENOVO-SE10": [SysVendor: "LENOVO", ProductName: "12NK"],
+ "LENOVO-SE10": [SysVendor: "LENOVO", ProductName: "12NL"],
+ "LENOVO-SE10": [SysVendor: "LENOVO", ProductName: "12NM"],
+]);
+
+struct SE10 {
+ /// Led registration
+ _led: Pin<KBox<Led<LedSE10>>>,
+}
+
+impl kernel::Module for SE10 {
+ fn init(_module: &'static ThisModule) -> Result<Self> {
+ if SE10_DMI_TABLE.check_system().is_none() {
+ return Err(ENODEV);
+ }
+
+ let led = KBox::try_pin_init(
+ Led::register(
+ None,
+ LedConfig {
+ name: Some(c_str!("platform:red:user")),
+ #[cfg(CONFIG_LEDS_TRIGGERS)]
+ hardware_trigger: Some(kernel::sync::Arc::pin_init(
+ triggers::Hardware::register(c_str!("wwan")),
+ GFP_KERNEL,
+ )?),
+ ..LedConfig::new(kernel::leds::Color::Red, LedSE10)
+ },
+ ),
+ GFP_KERNEL,
+ )?;
+
+ Ok(Self { _led: led })
+ }
+}
+
+/// Valid led commands.
+#[repr(u8)]
+#[allow(missing_docs)]
+enum LedCommand {
+ #[cfg(CONFIG_LEDS_TRIGGERS)]
+ Trigger = 0xB2,
+ Off = 0xB3,
+ On = 0xB4,
+ Blink = 0xB5,
+}
+
+struct LedSE10;
+
+impl LedSE10 {
+ /// Base address of the command port.
+ const CMD_PORT: ResourceSize = 0x6C;
+ /// Length of the command port.
+ const CMD_LEN: ResourceSize = 1;
+ /// Blink duration the hardware supports.
+ const HW_DURATION: Delta = Delta::from_millis(1000);
+
+ /// Request led region.
+ fn request_cmd_region(&self) -> Result<Region<'static>> {
+ Region::request_muxed(Self::CMD_PORT, Self::CMD_LEN, c_str!("leds_lenovo_se10"))
+ .ok_or(EBUSY)
+ }
+
+ /// Send command.
+ fn send_cmd(&self, cmd: LedCommand) -> Result {
+ let region = self.request_cmd_region()?;
+ region.outb(cmd as u8, 0);
+ Ok(())
+ }
+}
+
+#[vtable]
+impl Operations for LedSE10 {
+ type This = Led<LedSE10>;
+
+ const MAX_BRIGHTNESS: u8 = 1;
+
+ fn brightness_set(this: &mut Self::This, brightness: u8) {
+ if let Err(e) = if brightness == 0 {
+ this.data.send_cmd(LedCommand::Off)
+ } else {
+ this.data.send_cmd(LedCommand::On)
+ } {
+ pr_warn!("Failed to set led: {e:?}\n)")
+ }
+ }
+
+ fn blink_set(
+ this: &mut Self::This,
+ delay_on: Delta,
+ delay_off: Delta,
+ ) -> Result<(Delta, Delta)> {
+ if !(delay_on.is_zero() && delay_off.is_zero()
+ || delay_on == Self::HW_DURATION && delay_off == Self::HW_DURATION)
+ {
+ return Err(EINVAL);
+ }
+
+ this.data.send_cmd(LedCommand::Blink)?;
+ Ok((Self::HW_DURATION, Self::HW_DURATION))
+ }
+}
+
+#[vtable]
+#[cfg(CONFIG_LEDS_TRIGGERS)]
+impl triggers::HardwareOperations for LedSE10 {
+ fn activate(this: &mut Self::This) -> Result {
+ this.data.send_cmd(LedCommand::Trigger)
+ }
+}
--
2.47.0
