From: Tien Fong Chee tien.fong.chee@intel.com

Add a document to describe file system firmware loader binding information.

Signed-off-by: Tien Fong Chee tien.fong.chee@intel.com --- doc/device-tree-bindings/chosen.txt | 21 +++++++++++++ doc/device-tree-bindings/misc/fs_loader.txt | 48 +++++++++++++++++++++++++++++ 2 files changed, 69 insertions(+) create mode 100644 doc/device-tree-bindings/misc/fs_loader.txt

diff --git a/doc/device-tree-bindings/chosen.txt b/doc/device-tree-bindings/chosen.txt index c96b8f7..dbce047 100644 --- a/doc/device-tree-bindings/chosen.txt +++ b/doc/device-tree-bindings/chosen.txt @@ -73,3 +73,24 @@ Example u-boot,spl-boot-order = "same-as-spl", &sdmmc, "/sdhci@fe330000"; }; }; + +firmware-loader property +------------------------ +Multiple file system firmware loader nodes could be defined in device trees for +multiple storage type and their default partition, then a property +"firmware-loader" can be used to pass default firmware loader +node(default storage type) to the firmware loader driver. + +Example +------- +/ { + chosen { + firmware-loader = &fs_loader0; + }; + + fs_loader0: fs-loader@0 { + u-boot,dm-pre-reloc; + compatible = "u-boot,fs-loader"; + phandlepart = <&mmc 1>; + }; +}; diff --git a/doc/device-tree-bindings/misc/fs_loader.txt b/doc/device-tree-bindings/misc/fs_loader.txt new file mode 100644 index 0000000..884fbf4 --- /dev/null +++ b/doc/device-tree-bindings/misc/fs_loader.txt @@ -0,0 +1,48 @@ +* File system firmware loader + +Required properties: +-------------------- + +- compatible: should contain "u-boot,fs-loader" +- phandlepart: which block storage device and partition the image loading from, + this property is required for mmc, usb and sata. This is unsigned + 32-bit array. For example phandlepart=<&mmc_0 1>, meaning use + that MMC0 node pointer, partition 1. +- mdtpart: which partition of ubi the image loading from, this property is + required for ubi and mounting. +- ubivol: which volume of ubi the image loading from, this property is required + for ubi and mounting. + +Example of storage device and partition search set for mmc, usb, sata and +ubi in device tree source as shown in below: + + Example of storage type and device partition search set for mmc, usb, + sata and ubi as shown in below: + Example for mmc: + fs_loader0: fs-loader@0 { + u-boot,dm-pre-reloc; + compatible = "u-boot,fs-loader"; + phandlepart = <&mmc_0 1>; + }; + + Example for usb: + fs_loader1: fs-loader@1 { + u-boot,dm-pre-reloc; + compatible = "u-boot,fs-loader"; + phandlepart = <&usb0 1>; + }; + + Example for sata: + fs_loader2: fs-loader@2 { + u-boot,dm-pre-reloc; + compatible = "u-boot,fs-loader"; + phandlepart = <&sata0 1>; + }; + + Example for ubi: + fs_loader3: fs-loader@3 { + u-boot,dm-pre-reloc; + compatible = "u-boot,fs-loader"; + mtdpart = "UBI", + ubivol = "ubi0"; + };