From: Pavel Herrmann <morpheus.ibis@gmail.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v4 15/15] dm: Expand and improve the device lifecycle docs
Date: Fri, 06 Jun 2014 21:52:53 +0200 [thread overview]
Message-ID: <1552477.9gIaszZOQa@bloomfield> (raw)
In-Reply-To: <1402082012-4152-16-git-send-email-sjg@chromium.org>
Hi,
I found some typos in this
On Friday 06 of June 2014 13:13:32 Simon Glass wrote:
> The lifecycle of a device is an important part of driver model. Add to the
> existing documentation and clarify it.
...snip...
> +This means that instead of having lots of U_BOOT_DEVICE() declarations in
> +the board file, we put these in the device tree. This approach allows a lot
> +more generality, since the same board file can support many types of
> boards +(e,g. with the same SoC) just by using different device trees. An
> added +benefit is that the Linux device tree can be used, thus further
> simplifying +the task of board-bring up either for U-Boot or Linux devs
> (whoever gets to +the baord first!).
s/baord/board/
...snip...
> +Note that compared to Linux, U-Boot's driver model has a separate step of
> +probe/remove which is independent of bind/unbind. This is partly because in
> +U-Boot it may be expensive to prove devices and we don't want to do it
> until +they are needed, or perhaps until after relocation.
s/prove/probe/
...snip...
> + d. All parent devices are probed. It is not possible to activate a
> device + unless its parents (all the way up to the root device) are
> activated. + This means (for example) that an I2C driver will require
> that its bus + be activated.
s/parents/predecessors/
in a tree, a node can have up to one parent. parent of a parent (recursively)
is a predecessor.
...snip...
> + e. The device is marked inactive. Note that it is still bound, so the
> + device structure itself is not freed at this point. Should the device be
> + activated again, then the cycle starts again at step 4 above.
if there were no drastic changes since I last checked, this would go to
activation/probe(), which is described in step 2
regards
Pavel Herrmann
next prev parent reply other threads:[~2014-06-06 19:52 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-06 19:13 [U-Boot] [PATCH v4 0/15] Collected driver model bug-fixes and docs Simon Glass
2014-06-06 19:13 ` [U-Boot] [PATCH v4 01/15] Add an I/O tracing feature Simon Glass
2014-06-06 19:13 ` [U-Boot] [PATCH v4 02/15] arm: Support iotrace feature Simon Glass
2014-06-06 19:13 ` [U-Boot] [PATCH v4 03/15] sandbox: " Simon Glass
2014-06-06 19:13 ` [U-Boot] [PATCH v4 04/15] Makefile: Support include files for .dts files Simon Glass
2014-06-06 20:29 ` Jon Loeliger
2014-06-06 20:44 ` Simon Glass
2014-06-06 19:13 ` [U-Boot] [PATCH v4 05/15] dm: Rename struct device_id to udevice_id Simon Glass
2014-06-06 20:26 ` Jon Loeliger
2014-06-06 20:30 ` Jon Loeliger
2014-06-06 20:36 ` Simon Glass
2014-06-06 19:13 ` [U-Boot] [PATCH v4 06/15] dm: Update README to encourage conversion to driver model Simon Glass
2014-06-06 19:13 ` [U-Boot] [PATCH v4 07/15] dm: Use case-insensitive comparison for GPIO banks Simon Glass
2014-06-06 19:13 ` [U-Boot] [PATCH v4 08/15] dm: Add missing header files in lists and root Simon Glass
2014-06-06 19:13 ` [U-Boot] [PATCH v4 09/15] dm: Cast away the const-ness of the global_data pointer Simon Glass
2014-06-08 5:00 ` Marek Vasut
2014-06-12 3:26 ` Simon Glass
2014-06-12 3:29 ` Simon Glass
2014-06-17 23:42 ` Marek Vasut
2014-06-18 5:36 ` Simon Glass
2014-06-20 4:07 ` Simon Glass
2014-06-20 4:12 ` Marek Vasut
2014-06-20 20:34 ` Simon Glass
2014-06-20 21:45 ` Marek Vasut
2014-06-06 19:13 ` [U-Boot] [PATCH v4 10/15] dm: Allow driver model tests only for sandbox Simon Glass
2014-06-06 19:13 ` [U-Boot] [PATCH v4 11/15] dm: Fix printf() strings in the 'dm' command Simon Glass
2014-06-08 22:46 ` Andre Renaud
2014-06-12 3:34 ` Simon Glass
2014-06-06 19:13 ` [U-Boot] [PATCH v4 12/15] tegra: dts: Bring in GPIO bindings from linux Simon Glass
2014-06-06 19:13 ` [U-Boot] [PATCH v4 13/15] tegra: Enable driver model Simon Glass
2014-06-06 19:13 ` [U-Boot] [PATCH v4 14/15] dm: Tidy up four minor code nits Simon Glass
2014-06-08 5:01 ` Marek Vasut
2014-06-06 19:13 ` [U-Boot] [PATCH v4 15/15] dm: Expand and improve the device lifecycle docs Simon Glass
2014-06-06 19:52 ` Pavel Herrmann [this message]
2014-06-06 20:42 ` Simon Glass
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