OpenCloudOS-Kernel/include
Chuanhong Guo f1541773af mtd: spinand: rework detect procedure for different READ_ID operation
Currently there are 3 different variants of read_id implementation:
1. opcode only. Found in GD5FxGQ4xF.
2. opcode + 1 addr byte. Found in GD5GxGQ4xA/E
3. opcode + 1 dummy byte. Found in other currently supported chips.

Original implementation was for variant 1 and let detect function
of chips with variant 2 and 3 to ignore the first byte. This isn't
robust:

1. For chips of variant 2, if SPI master doesn't keep MOSI low
during read, chip will get a random id offset, and the entire id
buffer will shift by that offset, causing detect failure.

2. For chips of variant 1, if it happens to get a devid that equals
to manufacture id of variant 2 or 3 chips, it'll get incorrectly
detected.

This patch reworks detect procedure to address problems above. New
logic do detection for all variants separatedly, in 1-2-3 order.
Since all current detect methods do exactly the same id matching
procedure, unify them into core.c and remove detect method from
manufacture_ops.

Tested on GD5F1GQ4UAYIG and W25N01GVZEIG.

Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20200208074439.146296-1-gch981213@gmail.com
2020-03-09 14:50:19 +01:00
..
acpi ACPI fixes for 5.6-rc4 2020-02-28 09:02:18 -08:00
asm-generic Microblaze patches for 5.6-rc1 2020-02-04 11:58:07 +00:00
clocksource clocksource/drivers/hyper-v: Untangle stimers and timesync from clocksources 2020-01-16 19:09:02 +01:00
crypto crypto: poly1305 - add new 32 and 64-bit generic versions 2020-01-16 15:18:12 +08:00
drm drm/amdgpu: fix doc by clarifying sched_list definition 2020-01-27 16:46:44 -05:00
dt-bindings ARM: SoC: late updates 2020-02-08 14:17:27 -08:00
keys
kunit kunit: allow kunit tests to be loaded as a module 2020-01-09 16:42:29 -07:00
kvm
linux mtd: spinand: rework detect procedure for different READ_ID operation 2020-03-09 14:50:19 +01:00
math-emu
media media: cec: remove unused functions 2020-01-08 14:38:06 +01:00
misc
net net: sched: correct flower port blocking 2020-02-17 21:33:28 -08:00
pcmcia
ras
rdma RDMA/core: Make the entire API tree static 2020-01-30 16:28:52 -04:00
scsi scsi: Revert "target: iscsi: Wait for all commands to finish before freeing a session" 2020-02-14 17:13:54 -05:00
soc ARM: SoC-related driver updates 2020-02-08 14:04:19 -08:00
sound ASoC: Fixes for v5.6 2020-02-18 13:33:39 +01:00
target
trace ARM: SoC-related driver updates 2020-02-08 14:04:19 -08:00
uapi USB fixes for 5.6-rc3 2020-02-21 12:44:53 -08:00
vdso lib/vdso: Prepare for time namespace support 2020-01-14 12:20:57 +01:00
video
xen xen: branch for v5.6-rc1 2020-02-05 17:44:14 +00:00