Add a SPI device which can be used for testing SPI flash features in
sandbox.
Also add a cros_ec device since with driver model the Chrome OS EC
emulation will not otherwise be available.
Signed-off-by: Simon Glass <s...@chromium.org>
---
arch/sandbox/dts/sandbox.dts | 25 +++++++++++++++++++++++++
doc/device-tree-bindings/mtd/spi/m25p80.txt | 29 +++++++++++++++++++++++++++++
2 files changed, 54 insertions(+)
create mode 100644 doc/device-tree-bindings/mtd/spi/m25p80.txt
diff --git a/arch/sandbox/dts/sandbox.dts b/arch/sandbox/dts/sandbox.dts
index daf5e73..fad1fae 100644
--- a/arch/sandbox/dts/sandbox.dts
+++ b/arch/sandbox/dts/sandbox.dts
@@ -1,6 +1,9 @@
/dts-v1/;
/ {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
aliases {
console = "/serial";
};
@@ -131,5 +134,27 @@
num-gpios = <20>;
};
+ spi@0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0>;
+ compatible = "sandbox,spi";
+ cs-gpios = <0>, <&gpio_a 0>;
+ flash@0 {
+ reg = <0>;
+ compatible = "spansion,m25p16", "sandbox,spi-flash";
+ spi-max-frequency = <40000000>;
+ sandbox,filename = "spi.bin";
+ };
+ };
+
+ cros-ec@0 {
+ compatible = "google,cros-ec";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ firmware_storage_spi: flash@0 {
+ reg = <0 0x400000>;
+ };
+ };
};
diff --git a/doc/device-tree-bindings/mtd/spi/m25p80.txt
b/doc/device-tree-bindings/mtd/spi/m25p80.txt
new file mode 100644
index 0000000..6d3d576
--- /dev/null
+++ b/doc/device-tree-bindings/mtd/spi/m25p80.txt
@@ -0,0 +1,29 @@
+* MTD SPI driver for ST M25Pxx (and similar) serial flash chips
+
+Required properties:
+- #address-cells, #size-cells : Must be present if the device has sub-nodes
+ representing partitions.
+- compatible : Should be the manufacturer and the name of the chip. Bear in
mind
+ the DT binding is not Linux-only, but in case of Linux, see the
+ "m25p_ids" table in drivers/mtd/devices/m25p80.c for the list of
+ supported chips.
+- reg : Chip-Select number
+- spi-max-frequency : Maximum frequency of the SPI bus the chip can operate at
+
+Optional properties:
+- m25p,fast-read : Use the "fast read" opcode to read data from the chip
instead
+ of the usual "read" opcode. This opcode is not supported by
+ all chips and support for it can not be detected at runtime.
+ Refer to your chips' datasheet to check if this is supported
+ by your chip.
+
+Example:
+
+ flash: m25p80@0 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "spansion,m25p80";
+ reg = <0>;
+ spi-max-frequency = <40000000>;
+ m25p,fast-read;
+ };
--
2.0.0.526.g5318336
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