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From: Curt Brune <curt-qUQiAmfTcIp+XZJcv9eMoEEOCMrvLtNR@public.gmane.org>
To: Wolfram Sang <wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org>
Cc: linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: at24: writing with SMBUS and no I2C_FUNC_SMBUS_WRITE_I2C_BLOCK
Date: Wed, 5 Mar 2014 10:33:05 -0800	[thread overview]
Message-ID: <20140305183305.GS27140@cumulusnetworks.com> (raw)

Hello -

I have a system that uses SMBUS, but without the
I2C_FUNC_SMBUS_WRITE_I2C_BLOCK functionality.  As it is today at24.c
will only support read-only mode for this case.

Looking at at24_eeprom_write() the comments indicate it only supports
page writes as the alternative is too slow.  This decision seems to be
the root of why SMBUS without I2C_FUNC_SMBUS_WRITE_I2C_BLOCK gives the
read-only situation.

The notion of "slow" seems a bit arbitrary to me.  Is there some other
technical reason or gotcha hiding here that you know of?

Would a nicely written patch that adds write support for this case be
acceptable?  I have not written it yet, but would like to.

Cheers,
Curt

             reply	other threads:[~2014-03-05 18:33 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-03-05 18:33 Curt Brune [this message]
     [not found] ` <20140305183305.GS27140-qUQiAmfTcIp+XZJcv9eMoEEOCMrvLtNR@public.gmane.org>
2014-03-05 20:15   ` at24: writing with SMBUS and no I2C_FUNC_SMBUS_WRITE_I2C_BLOCK Wolfram Sang

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