Remove /proc/cpuinfo Hardware field check

This field was removed from /proc/cpuinfo in a recent update.

src/spi/hal.rs

@@ -1,6 +1,6 @@
 use embedded_hal::{
     delay::DelayNs,
-    spi::{self, ErrorType, SpiBus, SpiDevice, Operation},
+    spi::{self, ErrorType, Operation, SpiBus, SpiDevice},
 };
 use embedded_hal_nb::spi::FullDuplex;
 use std::io;
@@ -115,10 +115,7 @@ impl<B: SpiBus<u8>> SimpleHalSpiDevice<B> {
 }
 
 impl<B: SpiBus<u8>> SpiDevice<u8> for SimpleHalSpiDevice<B> {
-    fn transaction(
-        &mut self,
-        operations: &mut [Operation<'_, u8>]
-    ) -> Result<(), Error> {
+    fn transaction(&mut self, operations: &mut [Operation<'_, u8>]) -> Result<(), Error> {
         for op in operations {
             match op {
                 Operation::Read(read) => {
@@ -158,7 +155,7 @@ impl<B: SpiBus<u8>> SpiDevice<u8> for SimpleHalSpiDevice<B> {
                 }
             }
         }
-    	Ok(())
+        Ok(())
     }
 }
 

src/system.rs

@@ -161,25 +161,13 @@ fn parse_proc_cpuinfo() -> Result<Model> {
         Err(_) => return Err(Error::UnknownModel),
     });
 
-    let mut hardware: String = String::new();
     let mut revision: String = String::new();
     for line in proc_cpuinfo.lines().flatten() {
-        if let Some(line_value) = line.strip_prefix("Hardware\t: ") {
-            hardware = String::from(line_value);
-        } else if let Some(line_value) = line.strip_prefix("Revision\t: ") {
+        if let Some(line_value) = line.strip_prefix("Revision\t: ") {
             revision = String::from(line_value).to_lowercase();
         }
     }
 
-    // Return an error if we don't recognize the SoC. This check is
-    // done to prevent accidentally identifying a non-Pi SBC as a Pi
-    // solely based on the revision field.
-    match &hardware[..] {
-        "BCM2708" | "BCM2835" | "BCM2709" | "BCM2836" | "BCM2710" | "BCM2837" | "BCM2837A1"
-        | "BCM2837B0" | "RP3A0-AU" | "BCM2710A1" | "BCM2711" | "BCM2712" => {}
-        _ => return Err(Error::UnknownModel),
-    }
-
     let model = if (revision.len() == 4) || (revision.len() == 8) {
         // Older revisions are 4 characters long, or 8 if they've been over-volted
         match &revision[revision.len() - 4..] {