From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
To: Wolfram Sang <wsa@the-dreams.de>
Cc: linux-i2c <linux-i2c@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [RESEND PATCH v2 0/9] eeprom: at24: at24cs series serial number read
Date: Mon, 21 Dec 2015 15:29:53 +0100 [thread overview]
Message-ID: <CAMpxmJW5GZ=HaA71Oo_HVTj02MLZEJsjYmyocuH7cvLtE4THJw@mail.gmail.com> (raw)
In-Reply-To: <CAMpxmJVag2E4GFSUW10vqCS32cCg0ymqkz=BOE1XS_qo655vBQ@mail.gmail.com>
2015-12-11 14:55 GMT+01:00 Bartosz Golaszewski <bgolaszewski@baylibre.com>:
> 2015-12-11 13:08 GMT+01:00 Wolfram Sang <wsa@the-dreams.de>:
>> On Wed, Dec 02, 2015 at 11:25:17AM +0100, Bartosz Golaszewski wrote:
>>> Chips from the at24cs EEPROM series have an additional read-only memory area
>>> containing a factory pre-programmed serial number. In order to access it, a
>>> dummy write must be executed before reading the serial number bytes.
>>
>> Can't you instantiate a read-only EEPROM on this second address? Or a
>> seperate driver attaching to this address? What is the advantage of
>> having this in at24?
>>
>
> The regular memory area and serial number read-only block share the
> internal address pointer. We must ensure that there's no race
> conditions between normal EEPROM reads/writes and serial number reads.
>
> Best regards,
> Bartosz Golaszewski
Hi Wolfram,
any chance of getting it in for 4.5?
Best regards,
Bartosz Golaszewski
next prev parent reply other threads:[~2015-12-21 14:29 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-02 10:25 [RESEND PATCH v2 0/9] eeprom: at24: at24cs series serial number read Bartosz Golaszewski
2015-12-02 10:25 ` [RESEND PATCH v2 1/9] eeprom: at24: platform_data: use BIT() macro Bartosz Golaszewski
2015-12-02 10:25 ` [RESEND PATCH v2 2/9] eeprom: at24: new flag in platform_data Bartosz Golaszewski
2015-12-02 10:25 ` [RESEND PATCH v2 3/9] eeprom: at24: tie up an additional address for at24cs series Bartosz Golaszewski
2015-12-02 10:25 ` [RESEND PATCH v2 4/9] eeprom: at24: support reading of the serial number Bartosz Golaszewski
2015-12-02 10:25 ` [RESEND PATCH v2 5/9] eeprom: at24: export the serial number through sysfs Bartosz Golaszewski
2015-12-02 10:25 ` [RESEND PATCH v2 6/9] eeprom: at24: improve the device_id table readability Bartosz Golaszewski
2015-12-02 10:25 ` [RESEND PATCH v2 7/9] eeprom: at24: add the at24cs series to the list of supported devices Bartosz Golaszewski
2015-12-02 10:25 ` [RESEND PATCH v2 8/9] eeprom: at24: remove a reduntant if Bartosz Golaszewski
2015-12-02 10:25 ` [RESEND PATCH v2 9/9] eeprom: at24: readability tweaks Bartosz Golaszewski
2015-12-11 12:08 ` [RESEND PATCH v2 0/9] eeprom: at24: at24cs series serial number read Wolfram Sang
2015-12-11 13:55 ` Bartosz Golaszewski
2015-12-21 14:29 ` Bartosz Golaszewski [this message]
2016-01-02 20:50 ` Wolfram Sang
2016-01-04 14:01 ` Bartosz Golaszewski
2016-01-05 18:58 ` Wolfram Sang
2016-01-07 16:10 ` Bartosz Golaszewski
2016-01-09 21:09 ` Wolfram Sang
2016-01-11 13:57 ` Bartosz Golaszewski
-- strict thread matches above, loose matches on Subject: below --
2015-11-24 9:44 Bartosz Golaszewski
2015-11-17 9:52 Bartosz Golaszewski
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