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authorWolfram Sang <w.sang@pengutronix.de>2010-11-17 13:00:48 +0100
committerGrant Likely <grant.likely@secretlab.ca>2010-12-24 02:13:36 -0700
commit9ed030d728f3bd03b6e869357da02725afda19a7 (patch)
tree2dfe452c10e5562a817197d686e7bed61d946fe4 /Documentation/powerpc
parent194588604765ac803f98fb9d19a36f6b835f4620 (diff)
misc/at24: parse device tree data
Information about the pagesize and read-only-status may also come from the devicetree. Parse this data, too, and act accordingly. While we are here, change the initialization printout a bit. write_max is useful to know to detect performance bottlenecks, the rest is superfluous. Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'Documentation/powerpc')
-rw-r--r--Documentation/powerpc/dts-bindings/eeprom.txt28
1 files changed, 28 insertions, 0 deletions
diff --git a/Documentation/powerpc/dts-bindings/eeprom.txt b/Documentation/powerpc/dts-bindings/eeprom.txt
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+++ b/Documentation/powerpc/dts-bindings/eeprom.txt
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+EEPROMs (I2C)
+
+Required properties:
+
+ - compatible : should be "<manufacturer>,<type>"
+ If there is no specific driver for <manufacturer>, a generic
+ driver based on <type> is selected. Possible types are:
+ 24c00, 24c01, 24c02, 24c04, 24c08, 24c16, 24c32, 24c64,
+ 24c128, 24c256, 24c512, 24c1024, spd
+
+ - reg : the I2C address of the EEPROM
+
+Optional properties:
+
+ - pagesize : the length of the pagesize for writing. Please consult the
+ manual of your device, that value varies a lot. A wrong value
+ may result in data loss! If not specified, a safety value of
+ '1' is used which will be very slow.
+
+ - read-only: this parameterless property disables writes to the eeprom
+
+Example:
+
+eeprom@52 {
+ compatible = "atmel,24c32";
+ reg = <0x52>;
+ pagesize = <32>;
+};