remove peekpoke dependency

peekpoke requires a clang toolchain in order to build.
Use a simple write to /dev/mem instead. which doesnt require any
additional packages.

Cargo.toml

@@ -34,7 +34,6 @@ inotify = "0.10.2"
 log = "0.4.21"
 nix = { version = "0.27.1", features = ["fs", "feature"] }
 openssl = "0.10.64"
-peekpoke = "0.3.0"
 pin-project = "1.1.5"
 pwhash = "1.0.0"
 rand = "0.8.5"

src/app/bmc_application.rs

@@ -31,7 +31,8 @@ use std::collections::HashMap;
 use std::path::PathBuf;
 use std::process::Command;
 use std::time::Duration;
-use tokio::io::{AsyncRead, AsyncSeek, AsyncWrite};
+use tokio::fs::OpenOptions;
+use tokio::io::{AsyncRead, AsyncSeek, AsyncSeekExt, AsyncWrite, AsyncWriteExt};
 
 pub type NodeInfos = [NodeInfo; 4];
 
@@ -297,7 +298,9 @@ impl BmcApplication {
 
     pub async fn reboot(&self, fel: bool) -> anyhow::Result<()> {
         if fel {
-            peekpoke::write(0x0709_0108, 0x5AA5_A55A);
+            let mut mem = OpenOptions::new().write(true).open("/dev/mem").await?;
+            mem.seek(std::io::SeekFrom::Start(0x0709_0108)).await?;
+            mem.write_u32(0x5AA5_A55A).await?;
             log::warn!("system reboot into FEL");
         }
 

src/hal/power_controller.rs

@@ -65,8 +65,8 @@ impl PowerController {
 
         let enable = gpio_output_array!(chip1, port1, port2, port3, port4);
 
-        let sysfs_power = fallback_when_not_exists(SYS_LED, SYS_LED_2_0_5);
-        let sysfs_reset = fallback_when_not_exists(STATUS_LED, STATUS_LED_2_0_5);
+        let sysfs_power = fallback_if_not_exist(SYS_LED, SYS_LED_2_0_5);
+        let sysfs_reset = fallback_if_not_exist(STATUS_LED, STATUS_LED_2_0_5);
 
         Ok(PowerController {
             enable,
@@ -137,7 +137,7 @@ async fn set_mode(node_id: usize, node_state: u8) -> std::io::Result<()> {
     tokio::fs::write(sys_path, node_value).await
 }
 
-fn fallback_when_not_exists(sysfs: &str, fallback: &str) -> PathBuf {
+fn fallback_if_not_exist(sysfs: &str, fallback: &str) -> PathBuf {
     let mut sysfs = PathBuf::from_str(sysfs).expect("valid utf8 path");
     if !sysfs.exists() {
         sysfs = PathBuf::from_str(fallback).expect("valid utf8 path");