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 sjg@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; + };