linux-kernel - Re: [PATCH v9 0/9] Add simple NVMEM Framework via regmap.

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Date:	Sun, 9 Aug 2015 17:19:16 +0200
From:	Andrew Lunn <andrew@...n.ch>
To:	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc:	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
	stefan.wahren@...e.com, devicetree@...r.kernel.org, arnd@...db.de,
	khilman@...nel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	s.hauer@...gutronix.de, sboyd@...eaurora.org,
	linux-kernel@...r.kernel.org, mporter@...sulko.com,
	pantelis.antoniou@...sulko.com, Rob Herring <robh+dt@...nel.org>,
	Mark Brown <broonie@...nel.org>, linux-api@...r.kernel.org,
	linux-arm-msm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, wxt@...k-chips.com
Subject: Re: [PATCH v9 0/9] Add simple NVMEM Framework via regmap.

Hi Srinivas

The AT24 eeprom driver contains the comment:

        /*                                                                                               
         * Export the EEPROM bytes through sysfs, since that's convenient.                               
         * By default, only root should see the data (maybe passwords etc)                               
         */

and as you would expect from this:

# ls -l ./devices/platform/soc/soc:aips-bus@...00000/40066000.i2c/i2c-0/0-0050/eeprom
-rw------- 1 root root 512 Aug  9 10:16 ./devices/platform/soc/soc:aips-bus@...00000/40066000.i2c/i2c-0/0-0050/eeprom

The AT25 and the MAX6875 driver are the same.

However nvmem has different defaults:

# ls -l ./devices/platform/soc/soc:aips-bus@...00000/40066000.i2c/i2c-0/0-0050/0-00500/nvmem
-rw-r--r-- 1 root root 0 Aug  9 10:16 ./devices/platform/soc/soc:aips-bus@...00000/40066000.i2c/i2c-0/0-0050/0-00500/nvmem

Has this been considered and discussed?

Thanks
    Andrew
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