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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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24
drivers/core/uclass.c
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@ -269,6 +269,30 @@ int uclass_find_device_by_name(enum uclass_id id, const char *name,
return -ENODEV;
}
#if !CONFIG_IS_ENABLED(OF_CONTROL) || CONFIG_IS_ENABLED(OF_PLATDATA)
int uclass_find_next_free_req_seq(enum uclass_id id)
{
struct uclass *uc;
struct udevice *dev;
int ret;
int max = -1;
ret = uclass_get(id, &uc);
if (ret)
return ret;
list_for_each_entry(dev, &uc->dev_head, uclass_node) {
if ((dev->req_seq != -1) && (dev->req_seq > max))
max = dev->req_seq;
}
if (max == -1)
return 0;
return max + 1;
}
#endif
int uclass_find_device_by_seq(enum uclass_id id, int seq_or_req_seq,
bool find_req_seq, struct udevice **devp)
{