[PATCH v4 0/3] mtd: rawnand: ams-delta: Cleanups and optimizations

Janusz Krzysztofik
2018-08-20T21:38:14Z

This series consist of possibly ready to apply patches extracted from
a former one titled "mtd: rawnand: ams-delta: Use GPIO API for data I/O".
Remaining patches implementing conversion of data I/O to GPIO have been
postponed until gpiolib is optimized to ensure sufficient performance.

Janusz Krzysztofik (3):
mtd: rawnand: ams-delta: show parent device in sysfs
mtd: rawnand: ams-delta: Use private structure
mtd: rawnand: ams-delta: Set port direction when needed

Changelog:
v4:
[PATCH v4 1/3] mtd: rawnand: ams-delta: show parent device in sysfs
- no changes.
[PATCH v4 2/3] mtd: rawnand: ams-delta: Use private structure
- no changes.
[PATCH v4 3/3] mtd: rawnand: ams-delta: Set port direction when
- formerly submitted as [PATCH v3 5/7], now rebased on top of 2/3 from
the top of the postponed "[PATCH v3 4/7] mtd: rawnand: ams-delta:
request data port GPIO resource",
- refactored as requested by Boris Brezillon, thanks.
Rrmoved from this series:
[PATCH v3 3/7] ARM: OMAP1: ams-delta: Provide GPIO lookup table for NAND
data port
- postponed, will be resubmitted when gpiolib optimizations are ready.
[PATCH v3 4/7] mtd: rawnand: ams-delta: request data port GPIO resource
- postponed, will be resubmitted when gpiolib optimizations are ready.
[PATCH v3 6/7] mtd: rawnand: ams-delta: Simplify pointer resolution
- no longer needed, the idea has been implemented in the refactored 3/3.
[RFC PATCH v3 7/7] mtd: rawnand: ams-delta: use GPIO API for data I/O
- postponed, will be resubmitted when gpiolib optimizations are ready.

v3:
[PATCH v3 1/7] mtd: rawnand: ams-delta: show parent device in sysfs
- renamed and an explanation added based on other similar patches on
Marek Vasut request, thanks.
[PATCH v3 2/7] mtd: rawnand: ams-delta: Use private structure
- no changes.
[PATCH v3 3/7] ARM: OMAP1: ams-delta: Provide GPIO lookup table for NAND
data port
- no changes.
[PATCH v3 4/7] mtd: rawnand: ams-delta: request data port GPIO resource
- no changes.
[PATCH v3 5/7] mtd: rawnand: ams-delta: Set port direction when needed
- modified to set port direction only when needed instead of on each
transfer as suggested by Boris, thanks, though I kept separate
*_next_byte() functions to maximize performance as much as possible,
- moved back in front of "mtd: rawnand: ams-delta: use GPIO API for data
I/O" with a comment added referring to the planned switch to GPIO API.
[PATCH v3 6/7] mtd: rawnand: ams-delta: Simplify pointer resolution
- moved back in front of "mtd: rawnand: ams-delta: use GPIO API for data
I/O" on Boris request, thanks.
[RFC PATCH v3 7/7] mtd: rawnand: ams-delta: use GPIO API for data I/O
- rebased back on top of the two mentioned above,
- not intended to apply it yet due to performance issues on Amstrad Delta.
Removed from the series:
[RFC PATCH v2 09/12] gpiolib: Identify GPIO descriptor arrays with direct
mapping
[RFC PATCH v2 10/12] gpiolib: Introduce bitmap get/set array API extension
[RFC PATCH v2 11/12] mtd: rawnand: ams-delta: Use GPIO API bitmap extension
[RFC PATCH v2 12/12] gpiolib: Add fast processing path to bitmap API functions
- intended to be still iterated in a follow up series until performance
issues are resolved.
[RFC PATCH v2 06/12] ARM: OMAP1: ams-delta: drop obsolete NAND resources
- postponed until acceptable performance on Amstrad Delta is achieved.

v2:
[RFC PATCH v2 00/12] mtd: rawnand: ams-delta: Use GPIO API for data I/O
- renamed from former [RFC PATCH 0/8] mtd: rawnand: ams-delta: Use
gpio-omap accessors for data I/O
[RFC PATCH v2 01/12] mtd: rawnand: ams-delta: Assign mtd->dev.parent,
not mtd->owner
- split out from former [RFC PATCH 1/8] on Boris request, thanks.
[RFC PATCH v2 02/12] mtd: rawnand: ams-delta: Use private structure
- remaining part of the former [RFC PATCH 1/8].
[RFC PATCH v2 03/12] ARM: OMAP1: ams-delta: Provide GPIO lookup table
for NAND data port
- split out from former [RFC PATCH 5/8] on Boris requesst, thanks,
[RFC PATCH v2 04/12] mtd: rawnand: ams-delta: request data port GPIO resource
- remaining part of the former [RFC PATCH 5/8],
[RFC PATCH v2 05/12] mtd: rawnand: ams-delta: use GPIO API for data read/write
- reworked from former [RFC PATCH 8/8] on Boris requesst to use pure
GPIO API, thanks,
- moved up in front of former [RFC PATCH 3/8] on Boris request, thanks.
[RFC PATCH v2 06/12] ARM: OMAP1: ams-delta: drop obsolete NAND resources
- split out from former [RFC PATCH 8/8].
[RFC PATCH v2 07/12] mtd: rawnand: ams-delta: Set port direction once per
transfer
- reworked from former [RFC PATCH 3/8] on top of [RFC PATCH v2 05/12].
[RFC PATCH v2 08/12] mtd: rawnand: ams-delta: Simplify pointer resolution
on read/write
- reworked from former [RFC PATCH 4/8] on top of [RFC PATCH v2 08/12],
- renamed from 'Optimize' to 'Simplify' on Boris request, thanks.
[RFC PATCH v2 09/12] gpiolib: Identify GPIO descriptor arrays with direct
mapping
- new patch.
[RFC PATCH v2 10/12] gpiolib: Introduce bitmap get/set array API extension
- new patch.
[RFC PATCH v2 11/12] mtd: rawnand: ams-delta: Use GPIO API bitmap extension
- new patch.
[RFC PATCH v2 12/12] gpiolib: Add fast processing path to bitmap API functions
- new patch.
Removed from the series:
[RFC PATCH 2/8] mtd: rawnand: ams-delta: Write protect device during probe
- postponed on Boris request, thanks.
[RFC PATCH 6/8] gpio: omap: Add get/set_multiple() callbacks
- already applied by Linux in linux-gpio tree, thanks.
[RFC PATCH 7/8] mtd: rawnand: ams-delta: Check sanity of data GPIO resource
- most controversial one, no longer needed after switching to GPIO API.

diffstat:
ams-delta.c | 196 +++++++++++++++++++++++++++++++++++-------------------------
1 file changed, 115 insertions(+), 81 deletions(-)