leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity
9a333a72c1
linux/drivers/mtd/spi-nor
History
Luis Alberto Herrera e93a977367 mtd: revert "spi-nor: intel: provide a range for poll_timout" 
This change reverts aba3a882a1: "mtd: spi-nor: intel: provide a range
for poll_timout". That change introduces a performance regression when
reading sequentially from flash. Logging calls to intel_spi_read without
this change we get:

Start MTD read
[   20.045527] intel_spi_read(from=1800000, len=400000)
[   20.045527] intel_spi_read(from=1800000, len=400000)
[  282.199274] intel_spi_read(from=1c00000, len=400000)
[  282.199274] intel_spi_read(from=1c00000, len=400000)
[  544.351528] intel_spi_read(from=2000000, len=400000)
[  544.351528] intel_spi_read(from=2000000, len=400000)
End MTD read

With this change:

Start MTD read
[   21.942922] intel_spi_read(from=1c00000, len=400000)
[   21.942922] intel_spi_read(from=1c00000, len=400000)
[   23.784058] intel_spi_read(from=2000000, len=400000)
[   23.784058] intel_spi_read(from=2000000, len=400000)
[   25.625006] intel_spi_read(from=2400000, len=400000)
[   25.625006] intel_spi_read(from=2400000, len=400000)
End MTD read

Signed-off-by: Luis Alberto Herrera <luisalberto@google.com>
Tested-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Link: https://lore.kernel.org/r/20200610224652.64336-1-luisalberto@google.com
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
2020-07-28 11:35:27 +03:00
..
controllers mtd: revert "spi-nor: intel: provide a range for poll_timout" 2020-07-28 11:35:27 +03:00
atmel.c mtd: spi-nor: Move Atmel bits out of core.c 2020-03-17 09:28:02 +02:00
catalyst.c mtd: spi-nor: Move Catalyst bits out of core.c 2020-03-17 09:28:05 +02:00
core.c mtd: spi-nor: Disable the flash quad mode in spi_nor_restore() 2020-07-13 12:09:52 +03:00
core.h mtd: spi-nor: Add capability to disable flash quad mode 2020-07-13 12:09:43 +03:00
eon.c mtd: spi-nor: Move Eon bits out of core.c 2020-03-17 09:28:02 +02:00
esmt.c mtd: spi-nor: Move ESMT bits out of core.c 2020-03-17 09:28:02 +02:00
everspin.c mtd: spi-nor: Move Everspin bits out of core.c 2020-03-17 09:28:03 +02:00
fujitsu.c mtd: spi-nor: Move Fujitsu bits out of core.c 2020-03-17 09:28:03 +02:00
gigadevice.c mtd: spi-nor: Trim what is exposed in spi-nor.h 2020-03-17 09:28:07 +02:00
intel.c mtd: spi-nor: Move Intel bits out of core.c 2020-03-17 09:28:03 +02:00
issi.c mtd: spi-nor: Trim what is exposed in spi-nor.h 2020-03-17 09:28:07 +02:00
Kconfig mtd: spi-nor: Fix SPI NOR acronym 2020-05-28 10:46:23 +03:00
macronix.c mtd: spi-nor: macronix: Add support for mx66u2g45g 2020-07-27 08:36:37 +03:00
Makefile mtd: spi-nor: Compile files in controllers/ directory 2020-04-09 22:00:13 +02:00
micron-st.c mtd: spi-nor: micron: Add SPI_NOR_DUAL_READ flag on mt25qu02g 2020-07-27 08:37:06 +03:00
sfdp.c mtd: spi-nor: sfdp: do not make invalid quad enable fatal 2020-07-13 10:43:19 +03:00
sfdp.h mtd: spi-nor: winbond: Fix 4-byte opcode support for w25q256 2020-05-31 08:34:16 +03:00
spansion.c mtd: spi-nor: update read capabilities for w25q64 and s25fl064k 2020-07-27 09:03:32 +03:00
sst.c mtd: spi-nor: Move SST bits out of core.c 2020-03-17 09:28:05 +02:00
winbond.c mtd: spi-nor: update read capabilities for w25q64 and s25fl064k 2020-07-27 09:03:32 +03:00
xilinx.c mtd: spi-nor: Trim what is exposed in spi-nor.h 2020-03-17 09:28:07 +02:00
xmc.c mtd: spi-nor: Move XMC bits out of core.c 2020-03-17 09:28:06 +02:00