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authorTom Rini <trini@konsulko.com>2016-05-27 15:49:43 -0400
committerTom Rini <trini@konsulko.com>2016-05-27 20:34:12 -0400
commite4a94ce4ac77396b181663c0493c50bc2d5b9143 (patch)
tree7564e2d5e7e24841a763460f7eaf91409abd0312 /doc
parent378f9134eba4665ea94a63653393d25418665fda (diff)
parent3c27b6ad540828c44a62d209030df5ba86896df0 (diff)
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Merge git://git.denx.de/u-boot-dm
For odroid-c2 (arch-meson) for now disable designware eth as meson now needs to do some harder GPIO work. Signed-off-by: Tom Rini <trini@konsulko.com> Conflicts: lib/efi_loader/efi_disk.c Modified: configs/odroid-c2_defconfig
Diffstat (limited to 'doc')
-rw-r--r--doc/device-tree-bindings/mailbox/mailbox.txt32
-rw-r--r--doc/driver-model/README.txt23
2 files changed, 46 insertions, 9 deletions
diff --git a/doc/device-tree-bindings/mailbox/mailbox.txt b/doc/device-tree-bindings/mailbox/mailbox.txt
new file mode 100644
index 0000000..be05b97
--- /dev/null
+++ b/doc/device-tree-bindings/mailbox/mailbox.txt
@@ -0,0 +1,32 @@
+* Generic Mailbox Controller and client driver bindings
+
+Generic binding to provide a way for Mailbox controller drivers to
+assign appropriate mailbox channel to client drivers.
+
+* Mailbox Controller
+
+Required property:
+- #mbox-cells: Must be at least 1. Number of cells in a mailbox
+ specifier.
+
+Example:
+ mailbox: mailbox {
+ ...
+ #mbox-cells = <1>;
+ };
+
+
+* Mailbox Client
+
+Required property:
+- mboxes: List of phandle and mailbox channel specifiers.
+
+Optional property:
+- mbox-names: List of identifier strings for each mailbox channel.
+
+Example:
+ pwr_cntrl: power {
+ ...
+ mbox-names = "pwr-ctrl", "rpc";
+ mboxes = <&mailbox 0 &mailbox 1>;
+ };
diff --git a/doc/driver-model/README.txt b/doc/driver-model/README.txt
index 7a24552..1b5ccec 100644
--- a/doc/driver-model/README.txt
+++ b/doc/driver-model/README.txt
@@ -606,19 +606,24 @@ methods actually defined.
1. Bind stage
-A device and its driver are bound using one of these two methods:
+U-Boot discovers devices using one of these two methods:
- - Scan the U_BOOT_DEVICE() definitions. U-Boot It looks up the
-name specified by each, to find the appropriate driver. It then calls
-device_bind() to create a new device and bind' it to its driver. This will
-call the device's bind() method.
+ - Scan the U_BOOT_DEVICE() definitions. U-Boot looks up the name specified
+by each, to find the appropriate U_BOOT_DRIVER() definition. In this case,
+there is no path by which driver_data may be provided, but the U_BOOT_DEVICE()
+may provide platdata.
- Scan through the device tree definitions. U-Boot looks at top-level
nodes in the the device tree. It looks at the compatible string in each node
-and uses the of_match part of the U_BOOT_DRIVER() structure to find the
-right driver for each node. It then calls device_bind() to bind the
-newly-created device to its driver (thereby creating a device structure).
-This will also call the device's bind() method.
+and uses the of_match table of the U_BOOT_DRIVER() structure to find the
+right driver for each node. In this case, the of_match table may provide a
+driver_data value, but platdata cannot be provided until later.
+
+For each device that is discovered, U-Boot then calls device_bind() to create a
+new device, initializes various core fields of the device object such as name,
+uclass & driver, initializes any optional fields of the device object that are
+applicable such as of_offset, driver_data & platdata, and finally calls the
+driver's bind() method if one is defined.
At this point all the devices are known, and bound to their drivers. There
is a 'struct udevice' allocated for all devices. However, nothing has been