Hi,
On 26.01.2016 12:46, Wolfram Sang wrote:
Honestly, I still think this is a micro-optimization: Assuming SCLKDIVEN is
basically CBSY plus 8 SD clock cycles, then we'd save in the best case (SD
clock is slowest, 24 MHz) around 333ns while we are polling with 1 us
granularity...
However, in case I assumed something wrong and so you guys have something to
play with, here is an RFC. Let me know what you think.
Wolfram Sang (2):
mmc: tmio/sdhi: introduce flag for RCar specific features
mmc: sdhi: on RCar, make use of CBSY bit
drivers/mmc/host/sh_mobile_sdhi.c | 19 +++++++++++++------
drivers/mmc/host/tmio_mmc_pio.c | 6 +++---
include/linux/mfd/tmio.h | 4 ++--
include/linux/mmc/tmio.h | 3 +++
4 files changed, 21 insertions(+), 11 deletions(-)
Checking the recent kernel [1] it seems to me that this changes never
made it into mainline.
Does anybody remember why and/or the history?
Best regards
Dirk
[1]
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/mmc/host/sh_mobile_sdhi.c#n509
