linux-kernel - Re: [PATCH V2 2/2] mfd: cros ec: spi: Simplify delay handling between SPI messages

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Message-ID: <20171119061741.GB51565@decatoncale.mtv.corp.google.com>
Date:   Sat, 18 Nov 2017 22:17:41 -0800
From:   Benson Leung <bleung@...gle.com>
To:     Jon Hunter <jonathanh@...dia.com>
Cc:     Lee Jones <lee.jones@...aro.org>, linux-kernel@...r.kernel.org,
        linux-tegra@...r.kernel.org,
        Brian Norris <briannorris@...omium.org>,
        Shawn Nematbakhsh <shawnn@...omium.org>,
        Benson Leung <bleung@...omium.org>
Subject: Re: [PATCH V2 2/2] mfd: cros ec: spi: Simplify delay handling
 between SPI messages

Hi Jon,

On Tue, Nov 14, 2017 at 02:43:28PM +0000, Jon Hunter wrote:
> The EC SPI driver prevents SPI transfers being to rapidly by keeping
> track of the time the last transfer was issued via the
> 'last_transfer_ns' variable. Previously, if the 'last_transfer_ns'
> variable was zero, this indicated that no previous transfer had been
> sent and that no delay was needed. However, the EC SPI driver has
> been updated to always initialise the 'last_transfer_ns' variable
> during probe and therefore, it is no longer necessary to test if it
> is zero. Remove the code that checks if this variable is zero.
> 
> Signed-off-by: Jon Hunter <jonathanh@...dia.com>
> Reviewed-by: Brian Norris <briannorris@...omium.org>

Acked-by: Benson Leung <bleung@...omium.org>

-- 
Benson Leung
Staff Software Engineer
Chrome OS Kernel
Google Inc.
bleung@...gle.com
Chromium OS Project
bleung@...omium.org

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