Re: [RFC] Short Circuit simplest Rust driver that touches real hardware?

[Geert Stappers <stappers@stappers.nl>]

On Mon, Apr 26, 2021 at 03:47:59PM -0400, Sven Van Asbroeck wrote:
>         ...
> 2. implement the simplest `IoMemBlock` in Rust. Since we have a live
> `struct device *`, the `IoMemBlock` constructor can simply call
> `devm_platform_get_and_ioremap_resource(our struct device *)` in C,
> which will automatically use the right method to retrieve the `void
> __iomem *`: devicetree, platform data, etc, we don't have to care.
> 3. use the `IoMemBlock` above to implement a trivial iomem-only driver
> as a module. A few possible candidates:
> * h/w random number generator in Raspberry Pi Zero: `brcm,bcm2835-rng`
> * SoC thermal sensor in Raspberry Pi Zero: `brcm,bcm2835-thermal`
> 4. we don't have `hwrng` or `thermal_hwmon` devices in Rust yet, but
> we could perhaps expose this as a `misc_device`, which is something we
> already have. A single temp or randnum readout might do the trick.
> 
> The Raspberry Pi Zero can be purchased for $10. There is [QEMU
> support](https://qemu.readthedocs.io/en/latest/system/arm/raspi.html)
> for the peripherals above.
> 
> Feedback and ideas welcome !

Hope that hardware manufactures see this opportunity.  Because I fear that
this cool project might get botched due lack of knowledge on hardware.


Implementing kernel module for 8250 UART in Rust is something that
wouldn't get botched due lack of hardware knowledge.



Regarding
Geert Stappers
-- 
Silence is hard to parse