Re: [PATCH v2 2/3] hwrng: starfive - Add TRNG driver for StarFive SoC

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Mon, Jan 09, 2023 at 03:41:14AM +0000, JiaJie Ho wrote:
>
> The average wait time is around 20 microseconds.
> I measured from writel cmd to wait_for_completion done.

Do you know of an upper bound? E.g., if we limit it to 40us how
many requests would fail on average?

Having a maximum delay of 40us would be OK with wait == 0.  So
you could implement it in a way such that if the wait time exceeded
40us then you return if wait == 0, otherwise you can wait longer.

Cheers,
-- 
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt



[Index of Archives]     [Device Tree Compilter]     [Device Tree Spec]     [Linux Driver Backports]     [Video for Linux]     [Linux USB Devel]     [Linux PCI Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Yosemite Backpacking]


  Powered by Linux