linux-kernel - Re: [PATCH V4 2/2] mtd: rawnand: qcom: set BAM mode only if not set already

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Message-Id: <20200615085946.22390-1-miquel.raynal@bootlin.com>
Date:   Mon, 15 Jun 2020 10:59:46 +0200
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Sivaprakash Murugesan <sivaprak@...eaurora.org>,
        miquel.raynal@...tlin.com, richard@....at, vigneshr@...com,
        peter.ujfalusi@...com, boris.brezillon@...labora.com,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V4 2/2] mtd: rawnand: qcom: set BAM mode only if not set already

On Fri, 2020-06-12 at 07:58:16 UTC, Sivaprakash Murugesan wrote:
> BAM is DMA controller on QCOM ipq platforms, BAM mode on NAND driver
> is set by writing BAM_MODE_EN bit on NAND_CTRL register.
> 
> NAND_CTRL is an operational register and in BAM mode operational
> registers are read only.
> 
> So, before enabling BAM mode by writing the NAND_CTRL register, check
> if BAM mode was already enabled by the bootloader, and enable BAM mode
> only if it is not enabled already.
> 
> Signed-off-by: Sivaprakash Murugesan <sivaprak@...eaurora.org>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next, thanks.

Miquel