OpenCloudOS-Kernel/drivers/fsi
Benjamin Herrenschmidt b632642e4c fsi/fsi-master-gpio: Reduce dpoll clocks
FSI_GPIO_DPOLL_CLOCKS is the number of clocks before sending
a DPOLL command after receiving a BUSY status. It should be
at least tSendDelay (16 clocks).

According to comments in the code, it needs to also be at least
21 clocks due to HW issues.

It's currently 100 clocks which impacts performances negatively
in some cases. Reduces it in half to 50 clocks which seems to
still be solid.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reviewed-by: Christopher Bostic <cbostic@linux.vnet.ibm.com>
Tested-by: Joel Stanley <joel@jms.id.au>
2018-06-12 14:04:52 +10:00
..
Kconfig fsi: Match fsi slaves and engines to available dt nodes 2018-03-14 19:11:00 +01:00
Makefile drivers/fsi: Add hub master support 2017-06-09 11:52:09 +02:00
fsi-core.c fsi: core: Add check for master property no-scan-on-init 2018-03-14 19:11:01 +01:00
fsi-master-gpio.c fsi/fsi-master-gpio: Reduce dpoll clocks 2018-06-12 14:04:52 +10:00
fsi-master-hub.c fsi: master: Clarify master lifetimes & fix use-after-free in hub master 2018-03-14 19:11:01 +01:00
fsi-master.h fsi: master: Clarify master lifetimes & fix use-after-free in hub master 2018-03-14 19:11:01 +01:00
fsi-scom.c drivers/fsi/scom: Remove reset before every putscom 2017-08-28 17:15:16 +02:00