Re: [PATCH v2 3/3] i2c: iproc: Support larger TX transfer

From	Wolfram Sang <wsa@the-dreams.de>
Newsgroups	linux.kernel
Subject	Re: [PATCH v2 3/3] i2c: iproc: Support larger TX transfer
Date	2016-02-12 22:50 +0100
Message-ID	<r1tLe-49e-25@gated-at.bofh.it> (permalink)
References	<r1tia-3WT-5@gated-at.bofh.it> <r1tib-3WT-17@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Fri, Feb 12, 2016 at 01:10:43PM -0800, Ray Jui wrote:
> From: Ray Jui <rjui@broadcom.com>
> 
> The current iProc I2C driver only allows each TX transfer up to 63
> bytes (the TX FIFO has a size of 64 bytes, and one byte is reserved
> for slave address). This patch enhances the driver to support TX
> transfer in each I2C message for up to 65535 bytes (a practical
> maximum, since member 'max_write_len' of 'struct i2c_adapter_quirks is
> of type 'u16')
> 
> This works by loading up the I2C TX FIFO and enabling the TX underrun
> interrupt for each burst. After each burst of TX data is finished,
> i.e., when the TX FIFO becomes empty, the TX underrun interrupt will be
> triggered and another burst of TX data can be loaded into the TX FIFO.
> This repeats until all TX data are finished
> 
> Signed-off-by: Ray Jui <rjui@broadcom.com>
> Tested-by: Icarus Chau <ichau@broadcom.com>
> Reviewed-by: Scott Branden <sbranden@broadcom.com>

Applied to for-next, thanks!

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[PATCH v2 0/3] iProc I2C driver enhancement Ray Jui <ray.jui@broadcom.com> - 2016-02-12 22:20 +0100
  [PATCH v2 1/3] i2c: iproc: Add recovery mechanism in error case Ray Jui <ray.jui@broadcom.com> - 2016-02-12 22:20 +0100
    Re: [PATCH v2 1/3] i2c: iproc: Add recovery mechanism in error case Ray Jui <ray.jui@broadcom.com> - 2016-02-12 22:50 +0100
    Re: [PATCH v2 1/3] i2c: iproc: Add recovery mechanism in error case Wolfram Sang <wsa@the-dreams.de> - 2016-02-12 22:50 +0100
  [PATCH v2 3/3] i2c: iproc: Support larger TX transfer Ray Jui <ray.jui@broadcom.com> - 2016-02-12 22:20 +0100
    Re: [PATCH v2 3/3] i2c: iproc: Support larger TX transfer Wolfram Sang <wsa@the-dreams.de> - 2016-02-12 22:50 +0100

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