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dm: Add platform data advice and admonishment

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We should guide people more strongly towards device tree to avoid the
proliferation of platform data structures. Add documentation to the driver
model README, and also the platform data header file.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2015-07-06 12:54:22 -06:00
parent e15bb3e63c
commit 97f3ee34b6
2 changed files with 24 additions and 2 deletions
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9
include/dm/platdata.h
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@ -16,6 +16,10 @@
/**
* struct driver_info - Information required to instantiate a device
*
* NOTE: Avoid using this except in extreme circumstances, where device tree
* is not feasible (e.g. serial driver in SPL where <8KB of SRAM is
* available). U-Boot's driver model uses device tree for configuration.
*
* @name: Driver name
* @platdata: Driver-specific platform data
*/
@ -24,6 +28,11 @@ struct driver_info {
const void *platdata;
};
/**
* NOTE: Avoid using these except in extreme circumstances, where device tree
* is not feasible (e.g. serial driver in SPL where <8KB of SRAM is
* available). U-Boot's driver model uses device tree for configuration.
*/
#define U_BOOT_DEVICE(__name) \
ll_entry_declare(struct driver_info, __name, driver_info)