[PATCH v3 0/7] Marvell NAND controller rework with ->exec_op()

[Boris Brezillon]

On Tue,  9 Jan 2018 11:36:30 +0100
Miquel Raynal <miquel.raynal at free-electrons.com> wrote:

> Hi,
> 
> After the addition of the NAND framework ->exec_op() interface (see [1]
> for the series preparing it and [2] for the last version of the
> core-side implementation of ->exec_op() itself), this series replaces
> the current Marvell NAND controller driver pxa3xx_nand.c with a rework
> called marvell_nand.c.
> 
> Aside the fact that it drops the big state machine, improves the overall
> speed and implements raw accesses, it is the first driver-side
> implementation of the ->exec_op() interface and may be used as reference
> for latter reworks of the same type.
> 
> One may find more detail about why a completely new driver is needed in
> the commit log of:
> 
>     "mtd: nand: add reworked Marvell NAND controller driver"
> 
> Device tree NAND node definition for all platforms referring to the
> Marvell driver using the new bindings have already been accepted by the
> MVEBU DT maintainers and will be merged after the driver. They are more
> hierarchical and fit the real organization of the hardware, by having
> NAND partitions that are part of NAND chip nodes, themselves part of the
> NAND controller node.
> 
> These changes have been tested on:
>    - PXA3xx platform with a CM-X300 board (2kiB page NAND, 1b/512B
>      strength, Hamming ECC engine) [32 bits]
>    - Armada 385 DB AP (4kiB page NAND, 4b/512B, BCH ECC engine) [32 bits]
>    - Armada 398 DB (4kiB page NAND, 8b/512B, BCH ECC engine using a layout
>      with a last chunk different than the others) [32 bits]
>    - Armada 7040 DB and Armada 8040 DB (4kiB page NAND, 4b/512B, BCH ECC
>      engine) [64 bits]
>    - Triax dvb-tc board (2kiB page NAND, 4b/512B, BCH ECC engine) [32 bits]
> 
> This version is known not to be stable yet with a Zylonite based setup but
> otherwise looks good for Marvell EBU platforms.
> 
> For people who would like to test it easily, a branch ready to be tested
> is available at [3]. It is based on nand/next and has all the changes
> brought by the previously mentionned series as well as this one.
> 
> Thank you,
> Miquèl
> 
> 
> [1] https://www.spinics.net/lists/arm-kernel/msg619633.html
> [2] http://lists.infradead.org/pipermail/linux-mtd/2017-December/077965.html
> [3] https://github.com/miquelraynal/linux/tree/marvell/nand-next/nfc
> 
> 
> Changes since v2:
>   - Added a patch to create the nand-rb property in the Documentation
>   - Rewording in the Documentation according to Rob's comments
>   - Moved from marvell,rb to nand-rb property in the code
>   - Disociated using this driver with Marvell EBU platforms than using
>     it with PXA ones
>   - Fixed the handling of 16-bit buses
>   - Fixed SPDX comment style
>   - Reorganized registers offsets/bit fields definitions as requested
>   - Moved to Kernel doc
>   - Changed the logic in ->select_chip() to use a prepared value of NDCR
>     only instead of recalculating it
>   - Fixed the presence of the SPARE_EN bit, reworked a bit the
>     hmg_do_read/write() helpers
>   - Fixed the OOB layouts that were unusable (all spare data first, then
>     all ECC bytes)
>   - Additional check on mtd->writesize when using NFCv1 (all sizes not
>     supported)
>   - Various typos/rewording
> 
> Changes since v1:
>   - Rewording
>   - Fixed BCH ->read/write_page() hooks for 2kiB pages NAND chips
>   - Removed license text, used SPDX tag instead
>   - Removed read_page_data()
>   - Enhanced the DT bindings document with the label property and the
>     deprecated bindings.
>   - Simplified the read_chunk() helper (OOB always read).
>   - Simplified the ->bch_read_page() hook by removing the addition raw
>     read to get ECC bytes.
>   - Fixed the ->correct() function that did not check for bitflips in
>     ECC bytes in erased pages.
> 
> 
> Miquel Raynal (7):
>   dt-bindings: mtd: document new nand-rb property
>   dt-bindings: mtd: add Marvell NAND controller documentation
>   mtd: nand: add reworked Marvell NAND controller driver
>   mtd: nand: use reworked NAND controller driver with Marvell EBU SoCs

Applied patches 1 to 4.

Can you please send a patch to add a new entry in MAINTAINERS for this
driver?

Thanks,

Boris

>   mtd: nand: use Marvell reworked NAND controller driver with all
>     platforms
>   dt-bindings: mtd: remove pxa3xx NAND controller documentation
>   mtd: nand: remove useless fields from pxa3xx NAND platform data
> 
>  .../devicetree/bindings/mtd/marvell-nand.txt       |  123 +
>  Documentation/devicetree/bindings/mtd/nand.txt     |    1 +
>  .../devicetree/bindings/mtd/pxa3xx-nand.txt        |   50 -
>  arch/arm/configs/cm_x300_defconfig                 |    2 +-
>  arch/arm/configs/mvebu_v7_defconfig                |    2 +-
>  arch/arm/configs/pxa3xx_defconfig                  |    3 +-
>  arch/arm/configs/pxa_defconfig                     |    2 +-
>  arch/arm/configs/raumfeld_defconfig                |    2 +-
>  arch/arm/mach-mmp/ttc_dkb.c                        |    4 +-
>  arch/arm/mach-pxa/cm-x300.c                        |    8 +-
>  arch/arm/mach-pxa/colibri-pxa3xx.c                 |    8 +-
>  arch/arm/mach-pxa/colibri.h                        |    2 +-
>  arch/arm/mach-pxa/littleton.c                      |   10 +-
>  arch/arm/mach-pxa/mxm8x10.c                        |   10 +-
>  arch/arm/mach-pxa/raumfeld.c                       |    6 +-
>  arch/arm/mach-pxa/zylonite.c                       |   10 +-
>  arch/arm64/configs/defconfig                       |    2 +-
>  drivers/mtd/nand/Kconfig                           |   18 +-
>  drivers/mtd/nand/Makefile                          |    2 +-
>  drivers/mtd/nand/marvell_nand.c                    | 2896 ++++++++++++++++++++
>  drivers/mtd/nand/pxa3xx_nand.c                     | 2104 --------------
>  include/linux/platform_data/mtd-nand-pxa3xx.h      |   43 +-
>  22 files changed, 3072 insertions(+), 2236 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/mtd/marvell-nand.txt
>  delete mode 100644 Documentation/devicetree/bindings/mtd/pxa3xx-nand.txt
>  create mode 100644 drivers/mtd/nand/marvell_nand.c
>  delete mode 100644 drivers/mtd/nand/pxa3xx_nand.c
>