power: Allow returned GPU clocks range to overridden by a platform config

data/platforms/jupiter.toml

@@ -23,3 +23,7 @@ systemd = "jupiter-fan-control.service"
 [tdp_limit]
 min = 3
 max = 15
+
+[gpu_clocks]
+min = 200
+max = 1600

src/hardware.rs

@@ -370,6 +370,7 @@ pub mod test {
                 "jupiter-fan-control.service",
             ))),
             tdp_limit: None,
+            gpu_clocks: None,
         }));
 
         let fan_control = FanControl::new(connection);

src/manager/user.rs

@@ -692,6 +692,7 @@ mod test {
                 "jupiter-fan-control.service",
             ))),
             tdp_limit: Some(RangeConfig::new(3, 15)),
+            gpu_clocks: Some(RangeConfig::new(200, 1600)),
         })
     }
 

src/platform.rs

@@ -27,6 +27,7 @@ pub(crate) struct PlatformConfig {
     pub storage: Option<StorageConfig>,
     pub fan_control: Option<ServiceConfig>,
     pub tdp_limit: Option<RangeConfig<u32>>,
+    pub gpu_clocks: Option<RangeConfig<u32>>,
 }
 
 #[derive(Clone, Deserialize, Debug)]

src/power.rs

@@ -268,6 +268,13 @@ pub(crate) async fn set_cpu_scaling_governor(governor: CPUScalingGovernor) -> Re
 }
 
 pub(crate) async fn get_gpu_clocks_range() -> Result<(u32, u32)> {
+    if let Some(range) = platform_config()
+        .await?
+        .as_ref()
+        .and_then(|config| config.gpu_clocks)
+    {
+        return Ok((range.min, range.max));
+    }
     let contents = read_gpu_sysfs_contents(GPU_CLOCK_LEVELS_SUFFIX).await?;
     let lines = contents.lines();
     let mut min = 1_000_000;