tool: Fix clippy warnings

Fix:

- clippy::unnecessary_cast
- clippy::needless_borrow

Allow:

- clippy::uninlined_format_args
- clippy::get_first

Signed-off-by: Tim Crawford <tcrawford@system76.com>

tool/src/access/lpc/linux.rs

@@ -158,7 +158,7 @@ impl Access for AccessLpcLinux {
         }
 
         // Write command byte, which starts command
-        self.write_cmd(SMFI_CMD_CMD, cmd as u8)?;
+        self.write_cmd(SMFI_CMD_CMD, cmd)?;
 
         // Wait for command to finish with timeout
         self.timeout.reset();

tool/src/access/lpc/sim.rs

@@ -35,7 +35,7 @@ impl AccessLpcSim {
 
     fn transaction(&mut self, kind: u8, addr: u16, value: u8) -> io::Result<u8> {
         let addr = addr.to_le_bytes();
-        let request = [kind as u8, addr[0], addr[1], value];
+        let request = [kind, addr[0], addr[1], value];
         if self.socket.send(&request)? != request.len() {
             return Err(io::Error::new(
                 io::ErrorKind::UnexpectedEof,
@@ -99,7 +99,7 @@ impl Access for AccessLpcSim {
         }
 
         // Write command byte, which starts command
-        self.write_cmd(SMFI_CMD_CMD, cmd as u8)?;
+        self.write_cmd(SMFI_CMD_CMD, cmd)?;
 
         // Wait for command to finish with timeout
         self.timeout.reset();

tool/src/main.rs

@@ -1,5 +1,7 @@
 // SPDX-License-Identifier: MIT
 
+#![allow(clippy::uninlined_format_args)]
+
 use clap::{Arg, App, AppSettings, SubCommand};
 use ectool::{
     Access,
@@ -225,6 +227,7 @@ unsafe fn matrix(ec: &mut Ec<Box<dyn Access>>) -> Result<(), Error> {
 
     let mut data = vec![0; data_size];
     ec.matrix_get(&mut data)?;
+    #[allow(clippy::get_first)]
     let rows = *data.get(0).unwrap_or(&0);
     let cols = *data.get(1).unwrap_or(&0);
     let mut byte = 2;
@@ -305,7 +308,7 @@ fn main() {
         .setting(AppSettings::SubcommandRequired)
         .arg(Arg::with_name("access")
             .long("access")
-            .possible_values(&["lpc-linux", "lpc-sim", "hid"])
+            .possible_values(["lpc-linux", "lpc-sim", "hid"])
             .default_value("lpc-linux")
         )
         .subcommand(SubCommand::with_name("console"))
@@ -386,13 +389,13 @@ fn main() {
         )
         .subcommand(SubCommand::with_name("set_no_input")
             .arg(Arg::with_name("value")
-                .possible_values(&["true", "false"])
+                .possible_values(["true", "false"])
                 .required(true)
             )
         )
         .subcommand(SubCommand::with_name("security")
             .arg(Arg::with_name("state")
-                .possible_values(&["lock", "unlock"])
+                .possible_values(["lock", "unlock"])
             )
         )
         .get_matches();

tool/src/spi.rs

@@ -154,6 +154,7 @@ impl<'a, S: Spi, T: Timeout> SpiRom<'a, S, T> {
         //TODO: automatically detect write command
         match self.spi.target() {
             SpiTarget::Main => for (i, word) in data.chunks(2).enumerate() {
+                #[allow(clippy::get_first)]
                 let low = *word.get(0).unwrap_or(&0xFF);
                 let high = *word.get(1).unwrap_or(&0xFF);