From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Serge Semin <Sergey.Semin@baikalelectronics.ru>,
Miquel Raynal <miquel.raynal@bootlin.com>,
Richard Weinberger <richard@nod.at>,
Vignesh Raghavendra <vigneshr@ti.com>
Cc: linux-kernel@vger.kernel.org,
Serge Semin <fancer.lancer@gmail.com>,
Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>,
linux-mtd@lists.infradead.org,
Pavel Parkhomenko <Pavel.Parkhomenko@baikalelectronics.ru>,
linux-mips@vger.kernel.org, Lee Jones <lee.jones@linaro.org>
Subject: Re: [PATCH v3] mtd: physmap: Add Baikal-T1 physically mapped ROM support
Date: Fri, 2 Oct 2020 09:15:42 +0200 [thread overview]
Message-ID: <20201002071542.26477-1-miquel.raynal@bootlin.com> (raw)
In-Reply-To: <20200920111445.21816-1-Sergey.Semin@baikalelectronics.ru>
On Sun, 2020-09-20 at 11:14:44 UTC, Serge Semin wrote:
> Baikal-T1 Boot Controller provides an access to a RO storages, which are
> physically mapped into the SoC MMIO space. In particularly there are
> Internal ROM embedded into the SoC with a pre-installed firmware,
> externally attached SPI flash (also accessed in the read-only mode) and a
> memory region, which mirrors one of them in accordance with the currently
> enabled system boot mode (also called Boot ROM).
>
> This commit adds the Internal ROM support to the physmap driver of the MTD
> kernel subsystem. The driver will create the Internal ROM MTD as long as
> it is defined in the system dts file. The physically mapped SPI flash
> region will be used to implement the SPI-mem interface. The mirroring
> memory region won't be accessible directly since it's redundant due to
> both bootable regions being exposed anyway.
>
> Note we had to create a dedicated code for the ROMs since read from the
> corresponding memory regions must be done via the dword-aligned addresses.
>
> Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
> Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>
> Cc: Pavel Parkhomenko <Pavel.Parkhomenko@baikalelectronics.ru>
> Cc: Lee Jones <lee.jones@linaro.org>
> Cc: linux-mips@vger.kernel.org
Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git mtd/next, thanks.
Miquel
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prev parent reply other threads:[~2020-10-02 7:16 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-20 11:14 [PATCH v3] mtd: physmap: Add Baikal-T1 physically mapped ROM support Serge Semin
2020-10-02 7:15 ` Miquel Raynal [this message]
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