summaryrefslogtreecommitdiff
path: root/Documentation/devicetree/bindings/misc/at25.txt
diff options
context:
space:
mode:
authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /Documentation/devicetree/bindings/misc/at25.txt
Initial import
Diffstat (limited to 'Documentation/devicetree/bindings/misc/at25.txt')
-rw-r--r--Documentation/devicetree/bindings/misc/at25.txt35
1 files changed, 35 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/misc/at25.txt b/Documentation/devicetree/bindings/misc/at25.txt
new file mode 100644
index 000000000..1d3447165
--- /dev/null
+++ b/Documentation/devicetree/bindings/misc/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>;
+ };