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dm: core: Allow sequence alias support to be removed for SPL

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In many cases SPL only uses a single serial port and there is no need for
alias sequence support. We will just use the serial port pointed to by
stdout-path in the /chosen node.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2015-02-27 22:06:30 -07:00
parent ab9fd2e83a
commit 36fa61dc61
3 changed files with 25 additions and 13 deletions
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9
drivers/core/Kconfig
View File

@ -46,3 +46,12 @@ config DM_STDIO
Normally serial drivers register with stdio so that they can be used
as normal output devices. In SPL we don't normally use stdio, so
we can omit this feature.
config DM_SEQ_ALIAS
bool "Support numbered aliases in device tree"
depends on DM
default y
help
Most boards will have a '/aliases' node containing the path to
numbered devices (e.g. serial0 = &serial0). This feature can be
disabled if it is not required, to save code space in SPL.

28
drivers/core/device.c
View File

@ -56,21 +56,23 @@ int device_bind(struct udevice *parent, const struct driver *drv,
dev->seq = -1;
dev->req_seq = -1;
#ifdef CONFIG_OF_CONTROL
/*
* Some devices, such as a SPI bus, I2C bus and serial ports are
* numbered using aliases.
*
* This is just a 'requested' sequence, and will be
* resolved (and ->seq updated) when the device is probed.
*/
if (uc->uc_drv->flags & DM_UC_FLAG_SEQ_ALIAS) {
if (uc->uc_drv->name && of_offset != -1) {
fdtdec_get_alias_seq(gd->fdt_blob, uc->uc_drv->name,
of_offset, &dev->req_seq);
if (IS_ENABLED(CONFIG_OF_CONTROL) && IS_ENABLED(CONFIG_DM_SEQ_ALIAS)) {
/*
* Some devices, such as a SPI bus, I2C bus and serial ports
* are numbered using aliases.
*
* This is just a 'requested' sequence, and will be
* resolved (and ->seq updated) when the device is probed.
*/
if (uc->uc_drv->flags & DM_UC_FLAG_SEQ_ALIAS) {
if (uc->uc_drv->name && of_offset != -1) {
fdtdec_get_alias_seq(gd->fdt_blob,
uc->uc_drv->name, of_offset,
&dev->req_seq);
}
}
}
#endif
if (!dev->platdata && drv->platdata_auto_alloc_size) {
dev->flags |= DM_FLAG_ALLOC_PDATA;
dev->platdata = calloc(1, drv->platdata_auto_alloc_size);

1
include/config_uncmd_spl.h
View File

@ -31,6 +31,7 @@
#undef CONFIG_DM_WARN
#undef CONFIG_DM_DEVICE_REMOVE
#undef CONFIG_DM_SEQ_ALIAS
#undef CONFIG_DM_STDIO
#endif /* CONFIG_SPL_BUILD */