framework_lib: Implement getting GPIO value

Example:

```
> sudo ./target/debug/framework_tool --get-gpio chassis_open_l
Getting GPIO value chassis_open_l: true
```

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

Author: JohnAZoidberg

framework_lib/src/chromium_ec/command.rs

@@ -30,6 +30,7 @@ pub enum EcCommands {
     FlashProtect = 0x15,
     PwmGetKeyboardBacklight = 0x0022,
     PwmSetKeyboardBacklight = 0x0023,
+    GpioGet = 0x93,
     I2cPassthrough = 0x9e,
     ConsoleSnapshot = 0x97,
     ConsoleRead = 0x98,

framework_lib/src/chromium_ec/commands.rs

@@ -180,6 +180,25 @@ impl EcRequest<EcResponsePwmGetKeyboardBacklight> for EcRequestPwmGetKeyboardBac
     }
 }
 
+#[repr(C, packed)]
+pub struct EcRequestGpioGetV0 {
+    pub name: [u8; 32],
+}
+
+#[repr(C, packed)]
+pub struct EcResponseGpioGetV0 {
+    pub val: u8,
+}
+
+impl EcRequest<EcResponseGpioGetV0> for EcRequestGpioGetV0 {
+    fn command_id() -> EcCommands {
+        EcCommands::GpioGet
+    }
+    fn command_version() -> u8 {
+        0
+    }
+}
+
 #[repr(C, packed)]
 pub struct EcRequestReboot {}
 

framework_lib/src/chromium_ec/mod.rs

@@ -854,6 +854,17 @@ impl CrosEc {
         }
         .send_command(self)
     }
+
+    pub fn get_gpio(&self, name: &str) -> EcResult<bool> {
+        const MAX_LEN: usize = 32;
+        let mut request = EcRequestGpioGetV0 { name: [0; MAX_LEN] };
+
+        let end = MAX_LEN.min(name.len());
+        request.name[..end].copy_from_slice(name[..end].as_bytes());
+
+        let res = request.send_command(self)?;
+        Ok(res.val == 1)
+    }
 }
 
 #[cfg_attr(not(feature = "uefi"), derive(clap::ValueEnum))]

framework_lib/src/commandline/clap_std.rs

@@ -128,6 +128,10 @@ struct ClapCli {
     #[arg(long)]
     charge_limit: Option<Option<u8>>,
 
+    /// Get GPIO value by name
+    #[arg(long)]
+    get_gpio: Option<String>,
+
     /// Get or set fingerprint LED brightness
     #[arg(long)]
     fp_brightness: Option<Option<FpBrightnessArg>>,
@@ -251,6 +255,7 @@ pub fn parse(args: &[String]) -> Cli {
         inputmodules: args.inputmodules,
         input_deck_mode: args.input_deck_mode,
         charge_limit: args.charge_limit,
+        get_gpio: args.get_gpio,
         fp_brightness: args.fp_brightness,
         kblight: args.kblight,
         console: args.console,

framework_lib/src/commandline/mod.rs

@@ -148,6 +148,7 @@ pub struct Cli {
     pub inputmodules: bool,
     pub input_deck_mode: Option<InputDeckModeArg>,
     pub charge_limit: Option<Option<u8>>,
+    pub get_gpio: Option<String>,
     pub fp_brightness: Option<Option<FpBrightnessArg>>,
     pub kblight: Option<Option<u8>>,
     pub console: Option<ConsoleArg>,
@@ -720,6 +721,13 @@ pub fn run_with_args(args: &Cli, _allupdate: bool) -> i32 {
         ec.set_input_deck_mode((*mode).into()).unwrap();
     } else if let Some(maybe_limit) = args.charge_limit {
         print_err(handle_charge_limit(&ec, maybe_limit));
+    } else if let Some(gpio_name) = &args.get_gpio {
+        print!("Getting GPIO value {}: ", gpio_name);
+        if let Ok(value) = ec.get_gpio(gpio_name) {
+            println!("{:?}", value);
+        } else {
+            println!("Not found");
+        }
     } else if let Some(maybe_brightness) = &args.fp_brightness {
         print_err(handle_fp_brightness(&ec, *maybe_brightness));
     } else if let Some(Some(kblight)) = args.kblight {
@@ -979,6 +987,7 @@ Options:
       --inputmodules         Show status of the input modules (Framework 16 only)
       --input-deck-mode      Set input deck power mode [possible values: auto, off, on] (Framework 16 only)
       --charge-limit [<VAL>] Get or set battery charge limit (Percentage number as arg, e.g. '100')
+      --get-gpio <GET_GPIO>  Get GPIO value by name
       --fp-brightness [<VAL>]Get or set fingerprint LED brightness level [possible values: high, medium, low]
       --kblight [<KBLIGHT>]  Set keyboard backlight percentage or get, if no value provided
       --console <CONSOLE>    Get EC console, choose whether recent or to follow the output [possible values: recent, follow]

framework_lib/src/commandline/uefi.rs

@@ -82,6 +82,7 @@ pub fn parse(args: &[String]) -> Cli {
         inputmodules: false,
         input_deck_mode: None,
         charge_limit: None,
+        get_gpio: None,
         fp_brightness: None,
         kblight: None,
         console: None,
@@ -187,6 +188,13 @@ pub fn parse(args: &[String]) -> Cli {
                 Some(None)
             };
             found_an_option = true;
+        } else if arg == "--get-gpio" {
+            cli.get_gpio = if args.len() > i + 1 {
+                Some(args[i + 1].clone())
+            } else {
+                None
+            };
+            found_an_option = true;
         } else if arg == "--kblight" {
             cli.kblight = if args.len() > i + 1 {
                 if let Ok(percent) = args[i + 1].parse::<u8>() {