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dm: device: Allow using uclass_find_device_by_seq() without OF_CONTROL

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If OF_CONTROL is not enabled and DM_SEQ_ALIAS is enabled, we must
assign an alias (requested sequence number) to devices that belongs to a
class with the DM_UC_FLAG_SEQ_ALIAS flag. Otherwise
uclass_find_device_by_seq() cannot be used to get/probe a device. In
particular i2c_get_chip_for_busnum() cannot be used.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
This commit is contained in:
Jean-Jacques Hiblot 2018-12-07 14:50:39 +01:00 • committed by Heiko Schocher
parent f32a8007ef
commit 3542ff29e4
3 changed files with 43 additions and 4 deletions
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13
include/dm/uclass-internal.h
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@ -11,6 +11,19 @@
#include <dm/ofnode.h>
/**
* uclass_find_next_free_req_seq() - Get the next free req_seq number
*
* This returns the next free req_seq number. This is useful only if
* OF_CONTROL is not used. The next free req_seq number is simply the
* maximum req_seq of the uclass + 1.
* This allows assiging req_seq number in the binding order.
*
* @id: Id number of the uclass
* @return The next free req_seq number
*/
int uclass_find_next_free_req_seq(enum uclass_id id);
/**
* uclass_get_device_tail() - handle the end of a get_device call
*