u-boot.git/drivers/core, branch v2014.10

kbuild: refactor some makefiles

2014-09-24T22:30:29+00:00

[1] Move driver/core/, driver/input/ and drivers/input/ entries
    from the top Makefile to drivers/Makefile

[2] Remove the conditional by CONFIG_DM in drivers/core/Makefile
    because the whole drivers/core directory is already selected
    by CONFIG_DM in the upper level

[3] Likewise for CONFIG_DM_DEMO in drivers/demo/Makefile

[4] Simplify common/Makefile - both CONFIG_DDR_SPD and
    CONFIG_SPD_EEPROM are boolean macros so they can directly
    select objects

Signed-off-by: Masahiro Yamada 
Acked-by: Marek Vasut

kconfig: add blank Kconfig files

2014-09-24T22:30:28+00:00

This would be useful to start moving various config options.

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

dm: avoid dev->req_seq overflow

2014-09-23T18:44:31+00:00

Since dev->req_seq value is initialized from "reg" property of fdt node,
there is posibility, that address value contained in fdt is greater than
INT_MAX, and then value in dev->req_seq is negative which led to probe()
fail.

This patch fix this problem by ensuring that req_seq is positive, unless
it's one of errno codes.

Signed-off-by: Robert Baldyga 
Acked-by: Simon Glass

dm: core: Allow device_bind() to used without CONFIG_OF_CONTROL

2014-09-23T18:44:30+00:00

The sequence number support in driver model requires device tree control.
It should be skipped if CONFIG_OF_CONTROL is not defined, and should not
require functions from fdtdec.

Signed-off-by: Simon Glass

dm: Adjust lists_bind_fdt() to return the bound device

2014-09-10T18:59:59+00:00

Allow the caller to find out the device that was bound in response to this
call.

Signed-off-by: Simon Glass

dm: Add dm_scan_other() to locate board-specific devices

2014-07-23T13:08:37+00:00

Some boards will have devices which are not in the device tree and do not
have platform data. They may be programnatically created, for example.
Add a hook which boards can use to bind those devices early in boot.

Signed-off-by: Simon Glass

dm: Improve errors and warnings in lists_bind_fdt()

2014-07-23T13:08:37+00:00

Add a debug message for when a device tree node has no driver. Also reword
the warning when a device fails to bind, which was misleading.

Signed-off-by: Simon Glass

dm: Add child_pre_probe() and child_post_remove() methods

2014-07-23T13:08:37+00:00

Some devices (particularly bus devices) must track their children, knowing
when a new child is added so that it can be set up for communication on the
bus.

Add a child_pre_probe() method to provide this feature, and a corresponding
child_post_remove() method.

Signed-off-by: Simon Glass

dm: Introduce per-child data for devices

2014-07-23T13:08:37+00:00

Some device types can have child devices and want to store information
about them. For example a USB flash stick attached to a USB host
controller would likely use this space. The controller can hold
information about the USB state of each of its children.

The data is stored attached to the child device in the 'parent_priv'
member. It can be auto-allocated by dm when the child is probed. To
do this, add a per_child_auto_alloc_size value to the parent driver.

Signed-off-by: Simon Glass

dm: Add functions to access a device's children

2014-07-23T13:08:37+00:00

Devices can have childen that can be addressed by a simple index, the
sequence number or a device tree offset. Add functions to access a child
in each of these ways.

The index is typically used as a fallback when the sequence number is not
available. For example we may use a serial UART with sequence number 0 as
the console, but if no UART has sequence number 0, then we can fall back
to just using the first UART (index 0).

The device tree offset function is useful for buses, where they want to
locate one of their children. The device tree can be scanned to find the
offset of each child, and that offset can then find the device.

Signed-off-by: Simon Glass