.. _device-tree/ibm,opal/flash: ibm,opal/flash device tree entries ================================== The flash@ nodes under ibm,opal describe flash devices that can be accessed through the OPAL_FLASH_{READ,ERASE,WRITE} interface. These interfaces take an 'id' parameter, which corresponds to the ibm,opal-id property of the node. The properties under a flash node are: - ``compatible = "ibm,opal-flash"`` ``ibm,opal-id = `` provides the index used for the OPAL_FLASH_XXX calls to reference this flash device ``reg = <0 size>`` the offset and size of the flash device ``ibm,flash-block-size`` the read/write/erase block size for the flash interface. Calls to read/write/erase must be aligned to the block size. ``#address-cells = <1>``, ``#size-cells = <1>`` flash devices are currently 32-bit addressable If valid partitions are found on the flash device, then ``partition@`` sub-nodes are added to the flash node. These match the Linux binding for flash partitions; the reg parameter contains the offset and size of the partition. Example: .. code-block:: dts flash@0 { reg = <0x0 0x4000000>; compatible = "ibm,opal-flash"; ibm,opal-id = <0x0>; ibm,flash-block-size = <0x1000>; #address-cells = <0x1>; phandle = <0x100002bf>; #size-cells = <0x1>; };