linux-kernel - [PATCH v5 0/3] mtd: rawnand: ams-delta: Cleanups and optimizations

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Date:   Thu, 20 Sep 2018 00:52:52 +0200
From:   Janusz Krzysztofik <jmkrzyszt@...il.com>
To:     Miquel Raynal <miquel.raynal@...tlin.com>
Cc:     Boris Brezillon <boris.brezillon@...tlin.com>,
        Richard Weinberger <richard@....at>,
        David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Marek Vasut <marek.vasut@...il.com>,
        Janusz Krzysztofik <jmkrzyszt@...il.com>,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v5 0/3] mtd: rawnand: ams-delta: Cleanups and optimizations


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:
v5:
- rebased against just resubmitted "[PATCH v5] mtd: rawnand: ams-delta:
  use GPIO lookup table" applied on top of nand/next

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 |  181 +++++++++++++++++++++++++++++++++++-------------------------
 1 file changed, 107 insertions(+), 74 deletions(-)