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authorRob Herring <robh@kernel.org>2015-09-04 01:47:47 +0300
committerRob Herring <robh@kernel.org>2015-10-22 17:21:22 +0300
commit58598f5be4fc15070fcb95a2ff36b7b966c3dee7 (patch)
tree2ba7f3727cee451c50661850e06a283af972fac0 /Documentation/devicetree/bindings/eeprom
parent7755313e69aac99800c617ea835d86cd06f7f54c (diff)
downloadlinux-58598f5be4fc15070fcb95a2ff36b7b966c3dee7.tar.xz
dt-bindings: consolidate eeprom bindings
Create a top level eeprom binding directory and move several scattered binding files there. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Pawel Moll <pawel.moll@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Ian Campbell <ijc+devicetree@hellion.org.uk> Cc: Kumar Gala <galak@codeaurora.org>
Diffstat (limited to 'Documentation/devicetree/bindings/eeprom')
-rw-r--r--Documentation/devicetree/bindings/eeprom/at25.txt35
-rw-r--r--Documentation/devicetree/bindings/eeprom/eeprom.txt28
2 files changed, 63 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/eeprom/at25.txt b/Documentation/devicetree/bindings/eeprom/at25.txt
new file mode 100644
index 000000000000..1d3447165c37
--- /dev/null
+++ b/Documentation/devicetree/bindings/eeprom/at25.txt
@@ -0,0 +1,35 @@
+EEPROMs (SPI) compatible with Atmel at25.
+
+Required properties:
+- compatible : "atmel,at25".
+- reg : chip select number
+- spi-max-frequency : max spi frequency to use
+- pagesize : size of the eeprom page
+- size : total eeprom size in bytes
+- address-width : number of address bits (one of 8, 16, or 24)
+
+Optional properties:
+- spi-cpha : SPI shifted clock phase, as per spi-bus bindings.
+- spi-cpol : SPI inverse clock polarity, as per spi-bus bindings.
+- read-only : this parameter-less property disables writes to the eeprom
+
+Obsolete legacy properties are can be used in place of "size", "pagesize",
+"address-width", and "read-only":
+- at25,byte-len : total eeprom size in bytes
+- at25,addr-mode : addr-mode flags, as defined in include/linux/spi/eeprom.h
+- at25,page-size : size of the eeprom page
+
+Additional compatible properties are also allowed.
+
+Example:
+ at25@0 {
+ compatible = "atmel,at25", "st,m95256";
+ reg = <0>
+ spi-max-frequency = <5000000>;
+ spi-cpha;
+ spi-cpol;
+
+ pagesize = <64>;
+ size = <32768>;
+ address-width = <16>;
+ };
diff --git a/Documentation/devicetree/bindings/eeprom/eeprom.txt b/Documentation/devicetree/bindings/eeprom/eeprom.txt
new file mode 100644
index 000000000000..4342c10de1bf
--- /dev/null
+++ b/Documentation/devicetree/bindings/eeprom/eeprom.txt
@@ -0,0 +1,28 @@
+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>;
+};