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93d649bd94
linux/drivers/char/hw_random
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Lee Jones 93d649bd94 hwrng: st - Use real-world device timings for timeout 
Samples are documented to be available every 0.667us, so in theory
the 8 sample deep FIFO should take 5.336us to fill.  However, during
thorough testing, it became apparent that filling the FIFO actually
takes closer to 12us.

Also take into consideration that udelay() can behave oddly i.e. not
delay for as long as requested.

  Suggested-by: Russell King <rmk+kernel@arm.linux.org.uk>:

    "IIRC, Linus recommends a x2 factor on delays, especially
     timeouts generated by these functions.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-10-08 21:42:24 +08:00
..
amd-rng.c hwrng: printk replacement 2014-10-02 14:35:00 +08:00
atmel-rng.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
bcm63xx-rng.c hwrng: bcm63xx - Fix driver compilation 2015-05-04 17:49:52 +08:00
bcm2835-rng.c char: hw_random: drop owner assignment from platform_drivers 2014-10-20 16:20:20 +02:00
core.c hwrng: core - Simplify RNG switching from sysfs 2015-09-21 22:00:41 +08:00
exynos-rng.c hwrng: exynos - make use of devm_hwrng_register 2015-03-16 21:45:55 +11:00
geode-rng.c hwrng: printk replacement 2014-10-02 14:35:00 +08:00
intel-rng.c hwrng: printk replacement 2014-10-02 14:35:00 +08:00
iproc-rng200.c hwrng: iproc-rng200 - make use of devm_hwrng_register 2015-03-16 21:45:56 +11:00
ixp4xx-rng.c IXP4xx: HW pseudo-random generator is available on IXP45x/46x only. 2012-11-22 03:35:39 +00:00
Kconfig hwrng: st - Add support for ST's HW Random Number Generator 2015-09-21 22:00:42 +08:00
Makefile hwrng: st - Add support for ST's HW Random Number Generator 2015-09-21 22:00:42 +08:00
msm-rng.c hwrng: msm - make use of devm_hwrng_register 2015-03-16 21:45:55 +11:00
mxc-rnga.c hwrng: mxc-rnga - Use the preferred format for kzalloc 2015-09-21 22:00:39 +08:00
n2-asm.S
n2-drv.c char: hw_random: drop owner assignment from platform_drivers 2014-10-20 16:20:20 +02:00
n2rng.h n2rng: Attach on Niagara-T3. 2011-07-28 01:26:30 -07:00
nomadik-rng.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2014-04-03 09:28:16 -07:00
octeon-rng.c hwrng: octeon - Use devm_hwrng_register 2015-09-21 22:00:38 +08:00
omap3-rom-rng.c char: hw_random: drop owner assignment from platform_drivers 2014-10-20 16:20:20 +02:00
omap-rng.c hwrng: omap - Change RNG_CONFIG_REG to RNG_CONTROL_REG in init 2015-03-17 22:32:05 +11:00
pasemi-rng.c hwrng: Fix module autoload for OF platform drivers 2015-09-21 22:00:39 +08:00
powernv-rng.c char: constify of_device_id array 2015-03-16 21:10:28 +01:00
ppc4xx-rng.c hwrng: Fix module autoload for OF platform drivers 2015-09-21 22:00:39 +08:00
pseries-rng.c hwrng: pseries - remove incorrect __init/__exit markups 2015-03-12 01:11:06 +11:00
st-rng.c hwrng: st - Use real-world device timings for timeout 2015-10-08 21:42:24 +08:00
timeriomem-rng.c char: hw_random: drop owner assignment from platform_drivers 2014-10-20 16:20:20 +02:00
tpm-rng.c hw_random: add support for the TPM chip as a hardware RNG source 2012-08-22 11:11:41 -05:00
tx4939-rng.c char: hw_random: drop owner assignment from platform_drivers 2014-10-20 16:20:20 +02:00
via-rng.c x86/fpu: Rename i387.h to fpu/api.h 2015-05-19 15:47:30 +02:00
virtio-rng.c hwrng: virtio - drop extra empty line 2015-01-26 11:34:23 +11:00
xgene-rng.c hwrng: xgene - add ACPI support for APM X-Gene RNG unit 2015-03-09 21:06:19 +11:00