u-boot.git/drivers/core/Kconfig, branch v2016.05

spl: dm: Add SPL_DM_SEQ_ALIAS config option

2016-01-13T12:20:02+00:00

The Device Model sequence alias feature is required by some Uclasses.
Instead of disabling the feature for all SPL targets allow it to be
configured.

The config option is disabled by default to reduce code size for targets
that are not interested or do not require this feature.

Signed-off-by: Nathan Rossi 
Acked-by: Simon Glass 
Acked-by: Michal Simek 
Cc: Simon Glass 
Cc: Masahiro Yamada 
Cc: Linus Walleij 
Cc: Marek Vasut 
Cc: Michal Simek 
Cc: Stefan Roese 
Signed-off-by: Michal Simek

dm: core: Fix Kconfig text to mention SPL in SPL_OF_TRANSLATE

2015-12-11T03:41:56+00:00

Add a remark about SPL to this Kconfig option. Otherwise its identitcal
to the non-SPL version, which is confusing.

Signed-off-by: Stefan Roese 
Cc: Simon Glass 
Acked-by: Simon Glass 
Acked-by: Michal Simek

dm: core: Enable SPL_SIMPLE_BUS by default

2015-12-07T09:14:30+00:00

This option is needed for all SoCs which have nodes on bus. Without
enabling this drivers are not found and probed.
Issue was found on Zynq MMC probe.
Enable this option by default.

Signed-off-by: Michal Simek 
Reviewed-by: Stefan Roese 
Reviewed-by: Simon Glass

dm: core: Add SPL Kconfig for REGMAP and SYSCON

2015-12-01T15:07:22+00:00

Add SPL Kconfig for REGMAP and SYSCON, so REGMAP and SYSCON can
remove from SPL stage.

Signed-off-by: Lin Huang 
Acked-by: Simon Glass

dm: core: Enable optional use of fdt_translate_address()

2015-10-21T00:25:01+00:00

The current "simple" address translation simple_bus_translate() is not
working on some platforms (e.g. MVEBU). As here more complex "ranges"
properties are used in many nodes (multiple tuples etc). This patch
enables the optional use of the common fdt_translate_address() function
which handles this translation correctly.

Signed-off-by: Stefan Roese 
Cc: Simon Glass 
Cc: Bin Meng 
Cc: Marek Vasut 
Cc: Masahiro Yamada

dm: core: Add Kconfig for simple bus driver

2015-08-31T13:57:26+00:00

Add Kconfig entries for the simple-bus driver, both for U-Boot
and for SPL. The simple-bus is enabled by default in U-Boot and
disabled by default in SPL to preserve the original behavior.

Signed-off-by: Marek Vasut 
Cc: Simon Glass 
Acked-by: Simon Glass 
Modified to fit on top of Masahiro's $(SPL) setup:
Signed-off-by: Simon Glass

drivers: hierarchize drivers Kconfig menu

2015-08-13T00:47:44+00:00

The menuconfig for drivers are getting more and more cluttered
and unreadable because too many entries are displayed in a single
flat menu.  Use hierarchic menu for each category.

Signed-off-by: Masahiro Yamada 
Reviewed-by: Simon Glass 
[trini: Update to apply again in a few places, drop USB hunk]
Signed-off-by: Tom Rini

devres: add debug command to dump device resources

2015-08-06T13:44:29+00:00

This new command can dump all device resources associated to
each device.  The fields in every line shows:
  - The address of the resource
  - The size of the resource
  - The name of the release function
  - The stage in which the resource has been acquired (BIND/PROBE)

Currently, there is no driver using devres, but if such drivers are
implemented, the output of this command should look like this:

=> dm devres
- root_driver
- soc
- extbus
- serial@54006800
    bfb541e8 (8 byte) devm_kmalloc_release  BIND
    bfb54440 (4 byte) devm_kmalloc_release  PROBE
    bfb54460 (4 byte) devm_kmalloc_release  PROBE
- serial@54006900
    bfb54270 (8 byte) devm_kmalloc_release  BIND
- gpio@55000000
- i2c@58780000
    bfb5bce8 (12 byte) devm_kmalloc_release  PROBE
    bfb5bd10 (4 byte) devm_kmalloc_release  PROBE
- eeprom
    bfb54418 (12 byte) devm_kmalloc_release  BIND

Signed-off-by: Masahiro Yamada 
Acked-by: Simon Glass

devres: make Devres optional with CONFIG_DEVRES

2015-08-06T13:44:29+00:00

Currently, Devres requires additional 16 byte for each allocation,
which is not so insignificant in some cases.

Add CONFIG_DEVRES to make this framework optional.
If the option is disabled, devres functions fall back to
non-managed variants.  For example, devres_alloc() to kzalloc(),
devm_kmalloc() to kmalloc(), etc.

Because devres_head is also surrounded by an ifdef conditional,
there is no memory overhead when CONFIG_DEVRES is disabled.

Signed-off-by: Masahiro Yamada 
Suggested-by: Simon Glass 
Acked-by: Simon Glass

devres: introduce Devres (Managed Device Resource) framework

2015-08-06T13:44:29+00:00

In U-Boot's driver model, memory is basically allocated and freed
in the core framework.  So, low level drivers generally only have
to specify the size of needed memory with .priv_auto_alloc_size,
.platdata_auto_alloc_size, etc.  Nevertheless, some drivers still
need to allocate/free memory on their own in case they cannot
statically know the necessary memory size.  So, I believe it is
reasonable enough to port Devres into U-boot.

Devres, which originates in Linux, manages device resources for each
device and automatically releases them on driver detach.  With devres,
device resources are guaranteed to be freed whether initialization
fails half-way or the device gets detached.

The basic idea is totally the same to that of Linux, but I tweaked
it a bit so that it fits in U-Boot's driver model.

In U-Boot, drivers are activated in two steps: binding and probing.
Binding puts a driver and a device together.  It is just data
manipulation on the system memory, so nothing has happened on the
hardware device at this moment.  When the device is really used, it
is probed.  Probing initializes the real hardware device to make it
really ready for use.

So, the resources acquired during the probing process must be freed
when the device is removed.  Likewise, what has been allocated in
binding should be released when the device is unbound.  The struct
devres has a member "probe" to remember when the resource was
allocated.

CONFIG_DEBUG_DEVRES is also supported for easier debugging.
If enabled, debug messages are printed each time a resource is
allocated/freed.

Signed-off-by: Masahiro Yamada 
Acked-by: Simon Glass