From: Tien Fong Chee <tien.fong.c...@intel.com>
Add a document to describe file system firmware loader binding
information.
Signed-off-by: Tien Fong Chee <tien.fong.c...@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";
+ };
--
2.2.0
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