[opentitantool] Add set-pll command

This commit adds the `set-pll` command for configuring the output
frequency of the PLL on CW310 to 100 MHz.

Signed-off-by: Alphan Ulusoy <[email protected]>

Author: alphan

sw/host/opentitantool/BUILD

@@ -18,6 +18,7 @@ rust_binary(
         "src/command/image.rs",
         "src/command/load_bitstream.rs",
         "src/command/mod.rs",
+        "src/command/set_pll.rs",
         "src/command/spi.rs",
         "src/main.rs",
     ],

sw/host/opentitantool/src/command/mod.rs

@@ -10,6 +10,7 @@ pub mod hello;
 pub mod i2c;
 pub mod image;
 pub mod load_bitstream;
+pub mod set_pll;
 pub mod spi;
 
 use anyhow::Result;

sw/host/opentitantool/src/command/set_pll.rs

@@ -0,0 +1,27 @@
+// Copyright lowRISC contributors.
+// Licensed under the Apache License, Version 2.0, see LICENSE for details.
+// SPDX-License-Identifier: Apache-2.0
+
+use anyhow::Result;
+use erased_serde::Serialize;
+use std::any::Any;
+use structopt::StructOpt;
+
+use opentitanlib::app::command::CommandDispatch;
+use opentitanlib::app::TransportWrapper;
+use opentitanlib::transport::cw310;
+
+/// Program the CDCE906 PLL chip with defaults.
+#[derive(Debug, StructOpt)]
+pub struct SetPll {}
+
+impl CommandDispatch for SetPll {
+    fn run(
+        &self,
+        _context: &dyn Any,
+        transport: &TransportWrapper,
+    ) -> Result<Option<Box<dyn Serialize>>> {
+        log::info!("Programming the CDCE906 PLL chip with defaults");
+        Ok(transport.dispatch(&cw310::SetPll {})?)
+    }
+}

sw/host/opentitantool/src/main.rs

@@ -30,6 +30,7 @@ enum RootCommandHierarchy {
 
     I2c(command::i2c::I2cCommand),
     Image(command::image::Image),
+    SetPll(command::set_pll::SetPll),
     LoadBitstream(command::load_bitstream::LoadBitstream),
     NoOp(command::NoOp),
     Spi(command::spi::SpiCommand),