On 11/03/2017 01:18 PM, Eric Anholt wrote:

Florian Fainelli [off-list ref] writes:

quoted

bcm2835-rng is now capable of supporting the BCM63xx hardware, so remove
the driver which duplicates the same functionality.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 drivers/char/hw_random/Kconfig       |  13 ---
 drivers/char/hw_random/Makefile      |   1 -
 drivers/char/hw_random/bcm63xx-rng.c | 154 -----------------------------------
 3 files changed, 168 deletions(-)
 delete mode 100644 drivers/char/hw_random/bcm63xx-rng.c

quoted

diff --git a/drivers/char/hw_random/bcm63xx-rng.c b/drivers/char/hw_random/bcm63xx-rng.c
deleted file mode 100644
index 5132c9cde50d..000000000000
--- a/drivers/char/hw_random/bcm63xx-rng.c
+++ /dev/null

quoted

-static int bcm63xx_rng_data_present(struct hwrng *rng, int wait)
-{
-	struct bcm63xx_rng_priv *priv = to_rng_priv(rng);
-
-	return __raw_readl(priv->regs + RNG_STAT) & RNG_AVAIL_MASK;
-}

It looks like this method isn't in the 2835 implementation.  Should it
get ported over?

The read method already has something similar in that it busy loops
until it gets some random words available, which is why I did not port
it over.
-- 
Florian