Validate EEPROM after writing it

Signed-off-by: Daniel Schaefer <dhs@frame.work>

Author: JohnAZoidberg

framework_lib/src/chromium_ec/mod.rs

@@ -1526,6 +1526,17 @@ impl CrosEc {
         return_val
     }
 
+    pub fn validate_gpu_descriptor(&self, reference_desc: &[u8]) -> EcResult<bool> {
+        let header = self.read_gpu_desc_header()?;
+        if header.magic != [0x32, 0xAC, 0x00, 0x00] {
+            return Err(EcError::DeviceError(
+                "Invalid descriptor hdr magic".to_string(),
+            ));
+        }
+        let current_desc = self.read_ec_gpu_chunk(0x00, header.descriptor_length as u16)?;
+        Ok(current_desc == reference_desc)
+    }
+
     pub fn read_gpu_descriptor(&self) -> EcResult<Vec<u8>> {
         let header = self.read_gpu_desc_header()?;
         if header.magic != [0x32, 0xAC, 0x00, 0x00] {

framework_lib/src/commandline/mod.rs

@@ -1807,7 +1807,13 @@ pub fn run_with_args(args: &Cli, _allupdate: bool) -> i32 {
                 println!("  Size:       {:>20} KB", data.len() / 1024);
                 let res = ec.set_gpu_descriptor(&data, args.dry_run);
                 match res {
-                    Ok(()) => println!("GPU Descriptor successfully written"),
+                    Ok(()) => {
+                        println!("GPU Descriptor successfully written");
+                        println!("Reading Back GPU Descriptor");
+                        let valid = ec.validate_gpu_descriptor(&data);
+                        println!("  Read returns same bytes: {:?}", valid);
+
+                    },
                     Err(err) => println!("GPU Descriptor write failed with error:  {:?}", err),
                 }
             }