linux-kernel - Re: [PATCH v4 00/10] add STM32 FMC2 EBI controller driver

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Date:   Mon, 11 May 2020 11:22:37 +0200
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Christophe Kerello <christophe.kerello@...com>
Cc:     <richard@....at>, <vigneshr@...com>, <robh+dt@...nel.org>,
        <mark.rutland@....com>, <gregkh@...uxfoundation.org>,
        <boris.brezillon@...labora.com>, <linux-mtd@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <devicetree@...r.kernel.org>, <marex@...x.de>
Subject: Re: [PATCH v4 00/10] add STM32 FMC2 EBI controller driver

Hi Christophe,

Christophe Kerello <christophe.kerello@...com> wrote on Wed, 6 May 2020
11:11:09 +0200:

> The FMC2 functional block makes the interface with: synchronous and
> asynchronous static devices (such as PSNOR, PSRAM or other memory-mapped
> peripherals) and NAND flash memories.
> Its main purposes are:
>   - to translate AXI transactions into the appropriate external device
>     protocol
>   - to meet the access time requirements of the external devices
> All external devices share the addresses, data and control signals with the
> controller. Each external device is accessed by means of a unique Chip
> Select. The FMC2 performs only one access at a time to an external device.
> 
> Changes in v4:
>  - bindings:
>    - fix filename: st,stm32-fmc2-ebi.yaml
> 
> Changes in v3:
>  - NAND:
>    - rename labels used on errors
>    - add in the commit log the reason to increase FMC2_TIMEOUT_MS (patch 3)
>    - add Miquel reviewed-by tag (patches 2/4/5/9)
>  - EBI:
>    - move in memory folder
>    - merge MFD and BUS drivers to avoid a MFD driver
>  - bindings:
>    - pattern name has been modified
>    - vendor properties have been modified
>      - s/_/-/
>      - add unit suffix (-ns) on timing properties
> 
> Christophe Kerello (10):
>   mtd: rawnand: stm32_fmc2: manage all errors cases at probe time
>   mtd: rawnand: stm32_fmc2: remove useless inline comments
>   mtd: rawnand: stm32_fmc2: use FMC2_TIMEOUT_MS for timeouts
>   mtd: rawnand: stm32_fmc2: cleanup
>   mtd: rawnand: stm32_fmc2: use FIELD_PREP/FIELD_GET macros
>   dt-bindings: mtd: update STM32 FMC2 NAND controller documentation
>   dt-bindings: memory-controller: add STM32 FMC2 EBI controller
>     documentation
>   memory: stm32-fmc2-ebi: add STM32 FMC2 EBI controller driver
>   mtd: rawnand: stm32_fmc2: use regmap APIs
>   mtd: rawnand: stm32_fmc2: get resources from parent node
> 
>  .../memory-controllers/st,stm32-fmc2-ebi.yaml      |  261 +++++
>  .../bindings/mtd/st,stm32-fmc2-nand.yaml           |   19 +-
>  drivers/memory/Kconfig                             |   10 +
>  drivers/memory/Makefile                            |    1 +
>  drivers/memory/stm32-fmc2-ebi.c                    | 1206 ++++++++++++++++++++
>  drivers/mtd/nand/raw/Kconfig                       |    1 +
>  drivers/mtd/nand/raw/stm32_fmc2_nand.c             | 1176 ++++++++++---------
>  7 files changed, 2061 insertions(+), 613 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/memory-controllers/st,stm32-fmc2-ebi.yaml
>  create mode 100644 drivers/memory/stm32-fmc2-ebi.c
> 

I'm fine with the preparation patches 1-5 but the other patches need
Rob's hack and probably more changes. If it's fine with you I can apply
these patches for the next merge window and let more time to work on
the last 5.

Thanks,
Miquèl