linux-kernel - Re: [RFC PATCH 0/5] MTD: Add Initial Hyperbus support

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Message-ID: <a843dbb2-054a-2afd-863f-2d1822b3ca33@ti.com>
Date:   Tue, 19 Feb 2019 12:54:34 +0530
From:   Vignesh R <vigneshr@...com>
To:     David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Boris Brezillon <bbrezillon@...nel.org>,
        Marek Vasut <marek.vasut@...il.com>,
        Richard Weinberger <richard@....at>,
        Rob Herring <robh+dt@...nel.org>
CC:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Arnd Bergmann <arnd@...db.de>, <linux-mtd@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <tudor.ambarus@...rochip.com>, <nsekhar@...com>
Subject: Re: [RFC PATCH 0/5] MTD: Add Initial Hyperbus support



On 19/02/19 12:06 PM, Vignesh R wrote:
[...]
> 
> Tested on modified TI AM654 EVM with Cypress Hyperflash S26KS512 by
> creating a UBIFS partition and writing and reading files to it.
> Stress tested by writing/reading 16MB flash repeatedly at different
> offsets using dd commmand.
> 

Here is the enumeration log from dmesg:
https://pastebin.ubuntu.com/p/Vd5jYQT4FH/

> HyperBus specification can be found at[1]
> HyperFlash datasheet can be found at[2]
> TI's HBMC controller details at[3]
> 
> [1] https://www.cypress.com/file/213356/download
> [2] https://www.cypress.com/file/213346/download
> [3] http://www.ti.com/lit/ug/spruid7b/spruid7b.pdf
>     Table 12-5741. HyperFlash Access Sequence
> 
> Vignesh R (5):
>   mtd: cfi_cmdset_0002: Add support for polling status register
>   dt-bindings: mtd: Add binding documentation for Hyperbus memory
>     devices
>   mtd: Add support for Hyperbus memory devices
>   dt-bindings: mtd: Add bindings for TI's AM654 Hyperbus memory
>     controller
>   mtd: hyperbus: Add driver for TI's Hyperbus memory controller
> 
>  .../bindings/mtd/cypress,hyperbus.txt         |   6 +
>  .../devicetree/bindings/mtd/ti,am654-hbmc.txt |  27 +++
>  MAINTAINERS                                   |   8 +
>  drivers/mtd/Kconfig                           |   2 +
>  drivers/mtd/Makefile                          |   1 +
>  drivers/mtd/chips/cfi_cmdset_0002.c           |  50 ++++++
>  drivers/mtd/hyperbus/Kconfig                  |  23 +++
>  drivers/mtd/hyperbus/Makefile                 |   4 +
>  drivers/mtd/hyperbus/core.c                   | 167 ++++++++++++++++++
>  drivers/mtd/hyperbus/hbmc_am654.c             | 105 +++++++++++
>  include/linux/mtd/cfi.h                       |   5 +
>  include/linux/mtd/hyperbus.h                  |  73 ++++++++
>  12 files changed, 471 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mtd/cypress,hyperbus.txt
>  create mode 100644 Documentation/devicetree/bindings/mtd/ti,am654-hbmc.txt
>  create mode 100644 drivers/mtd/hyperbus/Kconfig
>  create mode 100644 drivers/mtd/hyperbus/Makefile
>  create mode 100644 drivers/mtd/hyperbus/core.c
>  create mode 100644 drivers/mtd/hyperbus/hbmc_am654.c
>  create mode 100644 include/linux/mtd/hyperbus.h
> 

-- 
Regards
Vignesh