• Alexander Clouter's avatar
    hwrng: timeriomem - New driver · 9c3c133b
    Alexander Clouter authored
    Some hardware platforms, the TS-7800[1] is one for example, can
    supply the kernel with an entropy source, albeit a slow one for
    TS-7800 users, by just reading a particular IO address.  This
    source must not be read above a certain rate otherwise the quality
    suffers.
    
    The driver is then hooked into by calling
    platform_device_(register|add|del) passing a structure similar to:
    ------
    static struct timeriomem_rng_data ts78xx_ts_rng_data = {
            .address        = (u32 *__iomem) TS_RNG,
            .period         = 1000000, /* one second */
    };
    
    static struct platform_device ts78xx_ts_rng_device = {
            .name           = "timeriomem_rng",
            .id             = -1,
            .dev            = {
                    .platform_data  = &ts78xx_ts_rng_data,
            },
            .num_resources  = 0,
    };
    ------
    
    [1] http://www.embeddedarm.com/products/board-detail.php?product=TS-7800Signed-off-by: default avatarAlexander Clouter <alex@digriz.org.uk>
    Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
    9c3c133b
timeriomem-rng.h 496 Bytes