linux-kernel - Re: [PATCH v3 06/16] mmc: tmio: refactor .get

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Date:   Wed, 7 Feb 2018 20:09:51 +0100
From:   Wolfram Sang <wsa@...-dreams.de>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     linux-mmc@...r.kernel.org,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Ulf Magnusson <ulfalizer@...il.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Simon Horman <horms+renesas@...ge.net.au>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        linux-renesas-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Ulf Hansson <ulf.hansson@...aro.org>
Subject: Re: [PATCH v3 06/16] mmc: tmio: refactor .get_ro hook

On Thu, Jan 18, 2018 at 01:28:06AM +0900, Masahiro Yamada wrote:
> This IP provides the write protect signal level in the status
> register, but it is also possible to use GPIO for WP.  They are
> exclusive, so it is not efficient to call mmc_gpio_get_ro() every
> time from tmio_mmc_get_ro() if we know gpio_ro is not used.
> 
> Check the capability of gpio_ro just once in the probe function,
> then set mmc_gpio_get_ro to .get_ro if it is the case.
> 
> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>

Reviewed-by: Wolfram Sang <wsa+renesas@...g-engineering.com>


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