Add a sandbox TKey driver that enables communication with physical TKey
devices via serial port (/dev/ttyACM0). This allows testing TKey
functionality in sandbox with real hardware.
The driver:
- Opens the configured device path from device tree
- Configures TTY parameters using os_tty_set_params()
- Implements read/write operations for TKey protocol
- Supports both read() and read_all() operations
Device tree configuration:
tkey-test {
compatible = "sandbox,tkey";
sandbox,device-path = "/dev/ttyACM0";
};
Series-to: concept
Cover-letter:
tkey: Provide basic support for Tillitis TKey
This device provides a way to sign data using an internal, unique key.
It can be useful for features such as unlocking an encrypted disk.
This series provides basic support for the Tkey, with a uclass, two
sandbox drivers (emulator and serial), a simple command some tests.
END
Co-developed-by: Claude <noreply@anthropic.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
797a952213