From: Boris Brezillon <boris.brezillon@bootlin.com>
To: Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>
Cc: "linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>
Subject: Re: NOR access from ARM-BE toolchain
Date: Fri, 17 Aug 2018 14:05:43 +0200 [thread overview]
Message-ID: <20180817140543.44ec1337@bbrezillon> (raw)
In-Reply-To: <VI1PR0402MB38542274356BBA43DED30DDC973D0@VI1PR0402MB3854.eurprd04.prod.outlook.com>
On Fri, 17 Aug 2018 10:54:24 +0000
Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com> wrote:
> Hi Boris,
>
> I am trying to access NOR flash with ARM running in big-endian mode. But it is causing error as " do_map_probe() failed for type cfi_probe"
>
> On our platform, The connection between Flash controller and NOR flash is little-endian.
> Here, ARM core running in littler endian mode with MTD_CFI_NOSWAP every things work fine.
>
> if we change ARM mode as big-endian, it start showing error as mentioned above.
> Error is same even with MTD_CFI_BE_BYTE_SWAP option.
> As per my understanding MTD_CFI_BE_BYTE_SWAP or MTD_CFI_LE_BYTE_SWAP deals with flash controller and flash connection.
If it works in little endian, you should enable MTD_CFI_LE_BYTE_SWAP
(or add the little-endian prop to the flash node in your DT).
> Not sure, if take care of Core endianness also.
>
> Please suggest!!
>
> Regards,
> Prabhakar
>
prev parent reply other threads:[~2018-08-17 12:05 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-17 10:54 NOR access from ARM-BE toolchain Prabhakar Kushwaha
2018-08-17 12:05 ` Boris Brezillon [this message]
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