feat(core/build): add reset command to xtask

diff --git a/core/embed/xtask/src/args.rs b/core/embed/xtask/src/args.rs
index d153ce38..7ca5f5f6 100644
--- a/core/embed/xtask/src/args.rs
+++ b/core/embed/xtask/src/args.rs
@@ -141,6 +141,8 @@ pub enum Cmd {
     Flash(FlashArgs),
     /// Erase flash or part of it using OpenOCD
     FlashErase(FlashEraseArgs),
+    /// Reset the connected device using OpenOCD
+    Reset(ResetArgs),
     /// Upload firmware to device
     Upload(UploadArgs),
     /// Combine multiple firmware projects into a single binary for flashing
@@ -326,6 +328,13 @@ pub struct FlashEraseArgs {
     pub model: Model,
 }
 
+#[derive(Args, Debug)]
+pub struct ResetArgs {
+    /// Target model
+    #[arg(long, short = 'm', ignore_case = true)]
+    pub model: Model,
+}
+
 #[derive(Args, Debug)]
 pub struct UploadArgs {
     pub project: Project,
diff --git a/core/embed/xtask/src/flash.rs b/core/embed/xtask/src/flash.rs
index 598c211d..b20effb9 100644
--- a/core/embed/xtask/src/flash.rs
+++ b/core/embed/xtask/src/flash.rs
@@ -5,7 +5,7 @@ use std::{
 };
 
 use crate::{
-    args::{FlashArgs, FlashEraseArgs, FlashSection},
+    args::{FlashArgs, FlashEraseArgs, FlashSection, ResetArgs},
     helpers,
 };
 
@@ -74,6 +74,26 @@ pub fn flash_erase(args: FlashEraseArgs) -> Result<()> {
     Ok(())
 }
 
+/// Resets the connected device using OpenOCD.
+pub fn reset(args: ResetArgs) -> Result<()> {
+    let model_config = args.model.config()?;
+
+    println!("Resetting `{:?}`", args.model);
+
+    let status = process::Command::new("openocd")
+        .args(["-f", "interface/stlink.cfg"])
+        .args(["-c", "transport select hla_swd"])
+        .args(["-f", model_config.openocd_target()?])
+        .arg("-c")
+        .arg("init; reset; exit")
+        .status()
+        .context("Failed to spawn `openocd`")?;
+
+    ensure!(status.success(), "`openocd` failed with status: {status}");
+
+    Ok(())
+}
+
 fn build_flash_write_instruction(binary: &Path, address: u32) -> String {
     format!(
         "init; reset halt; flash write_image erase {} 0x{:X}; exit",
diff --git a/core/embed/xtask/src/main.rs b/core/embed/xtask/src/main.rs
index 7f375711..277a427f 100644
--- a/core/embed/xtask/src/main.rs
+++ b/core/embed/xtask/src/main.rs
@@ -18,6 +18,7 @@ fn main() -> Result<()> {
         Cmd::Fmt => cargo::fmt(),
         Cmd::Flash(args) => flash::flash(args),
         Cmd::FlashErase(args) => flash::flash_erase(args),
+        Cmd::Reset(args) => flash::reset(args),
         Cmd::Upload(args) => upload::upload(args),
         Cmd::Combine(args) => combine::combine(args),
     }