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

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Date:   Mon, 11 May 2020 12:26:01 +0200
From:   Christophe Kerello <christophe.kerello@...com>
To:     Miquel Raynal <miquel.raynal@...tlin.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 Miquel,

On 5/11/20 11:22 AM, Miquel Raynal wrote:
> 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.
> 

I am fine with your proposal.

Regards,
Christophe Kerello.

> Thanks,
> Miquèl
>