Fix cargo clippy issues

src/backlight/demo_mode.rs

@@ -22,7 +22,6 @@ use std::str::{from_utf8, FromStr};
 use sysfs_class::{set_trait_method, trait_method};
 
 pub trait SysClass: Sized {
-    fn class() -> &'static str;
     unsafe fn from_path_unchecked(path: PathBuf) -> Self;
     fn path(&self) -> &Path;
 
@@ -60,7 +59,6 @@ pub trait SysClass: Sized {
 }
 
 pub trait Brightness {
-    fn brightness(&self) -> Result<u64>;
     fn max_brightness(&self) -> Result<u64>;
     fn set_brightness(&self, val: u64) -> Result<()>;
 }
@@ -70,10 +68,6 @@ pub struct Backlight {
 }
 
 impl SysClass for Backlight {
-    fn class() -> &'static str {
-        "backlight"
-    }
-
     unsafe fn from_path_unchecked(path: PathBuf) -> Self {
         Self { path }
     }
@@ -84,7 +78,6 @@ impl SysClass for Backlight {
 }
 
 impl Brightness for Backlight {
-    trait_method!(brightness parse_file u64);
     trait_method!(max_brightness parse_file u64);
     set_trait_method!("brightness", set_brightness u64);
 }

src/dbus/systemd.rs

@@ -59,8 +59,11 @@ pub struct Service {
 #[derive(Clone)]
 pub struct Systemd {
     pub reboot: Arc<Topic<bool>>,
+    #[allow(dead_code)]
     pub networkmanager: Service,
+    #[allow(dead_code)]
     pub labgrid: Service,
+    #[allow(dead_code)]
     pub iobus: Service,
 }
 

src/digital_io/gpio/test.rs

@@ -16,17 +16,14 @@
 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
 use std::cell::RefCell;
-use std::iter::Iterator;
 use std::ops::BitOr;
 use std::sync::atomic::{AtomicU8, Ordering};
-use std::thread::sleep;
-use std::time::Duration;
 
 use anyhow::Result;
 use async_std::sync::Arc;
 
 std::thread_local! {
-    static LINES: RefCell<Vec<(String, Arc<AtomicU8>)>> = RefCell::new(Vec::new());
+    static LINES: RefCell<Vec<(String, Arc<AtomicU8>)>> = const { RefCell::new(Vec::new()) };
 }
 
 pub struct LineHandle {
@@ -42,30 +39,6 @@ impl LineHandle {
     }
 }
 
-pub struct LineEvent(u8);
-
-pub struct LineEventHandle {
-    val: Arc<AtomicU8>,
-    prev_val: u8,
-}
-
-impl Iterator for LineEventHandle {
-    type Item = Result<LineEvent, ()>;
-
-    fn next(&mut self) -> Option<Self::Item> {
-        loop {
-            let val = self.val.load(Ordering::Relaxed);
-
-            if val != self.prev_val {
-                self.prev_val = val;
-                return Some(Ok(LineEvent(val)));
-            }
-
-            sleep(Duration::from_millis(100));
-        }
-    }
-}
-
 #[allow(clippy::upper_case_acronyms, non_camel_case_types)]
 #[derive(Clone, Copy)]
 pub enum LineRequestFlags {

src/led/demo_mode.rs

@@ -19,7 +19,7 @@ use std::io::{Error, ErrorKind, Result};
 use std::path::{Path, PathBuf};
 use std::str::{from_utf8, FromStr};
 
-use sysfs_class::{set_trait_method, trait_method};
+use sysfs_class::trait_method;
 
 const FILES_READ: &[(&str, &str)] = &[
     ("tac:green:out0/max_brightness", "1"),
@@ -30,7 +30,6 @@ const FILES_READ: &[(&str, &str)] = &[
 ];
 
 pub trait SysClass: Sized {
-    fn class() -> &'static str;
     unsafe fn from_path_unchecked(path: PathBuf) -> Self;
     fn path(&self) -> &Path;
 
@@ -68,20 +67,14 @@ pub trait SysClass: Sized {
 }
 
 pub trait Brightness {
-    fn brightness(&self) -> Result<u64>;
     fn max_brightness(&self) -> Result<u64>;
-    fn set_brightness(&self, val: u64) -> Result<()>;
 }
 
 pub struct Leds {
     path: PathBuf,
 }
 
 impl SysClass for Leds {
-    fn class() -> &'static str {
-        "leds"
-    }
-
     unsafe fn from_path_unchecked(path: PathBuf) -> Self {
         Self { path }
     }
@@ -92,7 +85,5 @@ impl SysClass for Leds {
 }
 
 impl Brightness for Leds {
-    trait_method!(brightness parse_file u64);
     trait_method!(max_brightness parse_file u64);
-    set_trait_method!("brightness", set_brightness u64);
 }

src/regulators.rs

@@ -67,6 +67,7 @@ use reg::regulator_set;
 
 pub struct Regulators {
     pub iobus_pwr_en: Arc<Topic<bool>>,
+    #[allow(dead_code)]
     pub uart_pwr_en: Arc<Topic<bool>>,
 }
 

src/system.rs

@@ -134,8 +134,11 @@ impl Barebox {
 }
 
 pub struct System {
+    #[allow(dead_code)]
     pub uname: Arc<Topic<Arc<Uname>>>,
+    #[allow(dead_code)]
     pub barebox: Arc<Topic<Arc<Barebox>>>,
+    #[allow(dead_code)]
     pub tacd_version: Arc<Topic<String>>,
 }
 

src/ui.rs

@@ -51,6 +51,7 @@ pub struct UiResources {
     pub rauc: crate::dbus::Rauc,
     pub regulators: crate::regulators::Regulators,
     pub setup_mode: crate::setup_mode::SetupMode,
+    #[allow(dead_code)]
     pub system: crate::system::System,
     pub systemd: crate::dbus::Systemd,
     pub temperatures: crate::temperatures::Temperatures,

src/usb_hub.rs

@@ -31,7 +31,6 @@ use crate::watched_tasks::WatchedTasksBuilder;
 #[cfg(feature = "demo_mode")]
 mod rw {
     use std::collections::HashMap;
-    use std::convert::AsRef;
     use std::io::Result;
     use std::path::Path;
     use std::sync::Mutex;