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Date:   Fri, 29 May 2020 00:27:35 +0200
From:   Andrew Lunn <>
To:     Marek Vasut <>
Cc:, "David S . Miller" <>,
        Lukas Wunner <>, Petr Stetiar <>,
        YueHaibing <>
Subject: Re: [PATCH V7 07/19] net: ks8851: Remove ks8851_rdreg32()

On Fri, May 29, 2020 at 12:21:34AM +0200, Marek Vasut wrote:
> The ks8851_rdreg32() is used only in one place, to read two registers
> using a single read. To make it easier to support 16-bit accesses via
> parallel bus later on, replace this single read with two 16-bit reads
> from each of the registers and drop the ks8851_rdreg32() altogether.
> If this has noticeable performance impact on the SPI variant of KS8851,
> then we should consider using regmap to abstract the SPI and parallel
> bus options and in case of SPI, permit regmap to merge register reads
> of neighboring registers into single, longer, read.
> Signed-off-by: Marek Vasut <>

Reviewed-by: Andrew Lunn <>


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