From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
To: Wolfram Sang <wsa@the-dreams.de>,
linux-i2c <linux-i2c@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Cc: Andrew Lunn <andrew@lunn.ch>,
Bartosz Golaszewski <bgolaszewski@baylibre.com>
Subject: [PATCH v2 10/13] eeprom: at24: add the at24cs series to the list of supported devices
Date: Thu, 24 Mar 2016 17:19:40 +0100 [thread overview]
Message-ID: <1458836383-6668-11-git-send-email-bgolaszewski@baylibre.com> (raw)
In-Reply-To: <1458836383-6668-1-git-send-email-bgolaszewski@baylibre.com>
The infrastructure for reading of the factory-programmed serial number
for at24cs EEPROM series is now in place. Add the chips that are actually
equipped with the serial number memory area to the list of supported
devices.
The chips from the at24cs family have two memory areas - a regular
read-write block and a read-only area containing the serial number.
The latter is visible on a different slave address (the address of the
wr memory block + 0x08). In order to access both blocks the user needs
to instantiate a regular at24c device for the wr block address and a
corresponding at24cs device on the serial number block address.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
drivers/misc/eeprom/at24.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c
index d3e4d66..281dd48 100644
--- a/drivers/misc/eeprom/at24.c
+++ b/drivers/misc/eeprom/at24.c
@@ -115,16 +115,34 @@ static const struct i2c_device_id at24_ids[] = {
{ "24c00", AT24_DEVICE_MAGIC(128 / 8, AT24_FLAG_TAKE8ADDR) },
/* old variants can't be handled with this generic entry! */
{ "24c01", AT24_DEVICE_MAGIC(1024 / 8, 0) },
+ { "24cs01", AT24_DEVICE_MAGIC(128 / 8,
+ AT24_FLAG_SERIAL | AT24_FLAG_READONLY) },
{ "24c02", AT24_DEVICE_MAGIC(2048 / 8, 0) },
+ { "24cs02", AT24_DEVICE_MAGIC(128 / 8,
+ AT24_FLAG_SERIAL | AT24_FLAG_READONLY) },
/* spd is a 24c02 in memory DIMMs */
{ "spd", AT24_DEVICE_MAGIC(2048 / 8,
AT24_FLAG_READONLY | AT24_FLAG_IRUGO) },
{ "24c04", AT24_DEVICE_MAGIC(4096 / 8, 0) },
+ { "24cs04", AT24_DEVICE_MAGIC(128 / 8,
+ AT24_FLAG_SERIAL | AT24_FLAG_READONLY) },
/* 24rf08 quirk is handled at i2c-core */
{ "24c08", AT24_DEVICE_MAGIC(8192 / 8, 0) },
+ { "24cs08", AT24_DEVICE_MAGIC(128 / 8,
+ AT24_FLAG_SERIAL | AT24_FLAG_READONLY) },
{ "24c16", AT24_DEVICE_MAGIC(16384 / 8, 0) },
+ { "24cs16", AT24_DEVICE_MAGIC(128 / 8,
+ AT24_FLAG_SERIAL | AT24_FLAG_READONLY) },
{ "24c32", AT24_DEVICE_MAGIC(32768 / 8, AT24_FLAG_ADDR16) },
+ { "24cs32", AT24_DEVICE_MAGIC(128 / 8,
+ AT24_FLAG_ADDR16 |
+ AT24_FLAG_SERIAL |
+ AT24_FLAG_READONLY) },
{ "24c64", AT24_DEVICE_MAGIC(65536 / 8, AT24_FLAG_ADDR16) },
+ { "24cs64", AT24_DEVICE_MAGIC(128 / 8,
+ AT24_FLAG_ADDR16 |
+ AT24_FLAG_SERIAL |
+ AT24_FLAG_READONLY) },
{ "24c128", AT24_DEVICE_MAGIC(131072 / 8, AT24_FLAG_ADDR16) },
{ "24c256", AT24_DEVICE_MAGIC(262144 / 8, AT24_FLAG_ADDR16) },
{ "24c512", AT24_DEVICE_MAGIC(524288 / 8, AT24_FLAG_ADDR16) },
--
2.7.4
next prev parent reply other threads:[~2016-03-24 16:19 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-24 16:19 [PATCH v2 00/13] eeprom: support for at24cs and at24mac Bartosz Golaszewski
2016-03-24 16:19 ` [PATCH v2 01/13] eeprom: at24: remove a reduntant if Bartosz Golaszewski
2016-03-24 16:19 ` [PATCH v2 02/13] eeprom: at24: improve the device_id table readability Bartosz Golaszewski
2016-03-24 16:19 ` [PATCH v2 03/13] eeprom: at24: platform_data: use BIT() macro Bartosz Golaszewski
2016-03-24 16:19 ` [PATCH v2 04/13] eeprom: at24: make locking more fine-grained Bartosz Golaszewski
2016-03-24 16:19 ` [PATCH v2 05/13] eeprom: at24: replace msleep() with usleep_range() Bartosz Golaszewski
2016-03-24 16:19 ` [PATCH v2 06/13] eeprom: at24: add serial number flag Bartosz Golaszewski
2016-03-24 16:19 ` [PATCH v2 07/13] eeprom: at24: support reading of the serial number Bartosz Golaszewski
2016-03-24 16:19 ` [PATCH v2 08/13] eeprom: at24: call read and write routines via function pointers Bartosz Golaszewski
2016-03-24 16:19 ` [PATCH v2 09/13] eeprom: at24: use at24cs_serial_read() Bartosz Golaszewski
2016-03-24 16:19 ` Bartosz Golaszewski [this message]
2016-03-24 16:19 ` [PATCH v2 11/13] eeprom: at24: add at24mac series flag Bartosz Golaszewski
2016-03-24 16:19 ` [PATCH v2 12/13] eeprom: at24: add support for at24mac series Bartosz Golaszewski
2016-03-24 16:19 ` [PATCH v2 13/13] eeprom: at24: add at24mac chips to the list of supported devices Bartosz Golaszewski
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