drivers: Introduce dev_set_name() ...

Introduce dev_set_name() in order to hide implementation details of
setting device's name so it'd be easier to change it.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: use of_property_read_bool where appropriate ...

Use of_property_read_bool where boolean properties are read.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

spi: only register enabled child nodes ...

Signed-off-by: Jan Luebbe <jluebbe@debian.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

driver: Call remove function only when available ...

The bus implementations currently call the drivers remove
hook unconditionally, but this hook is seldomly populated. Only call
it when it's actually populated.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

i2c/spi: match of_modaliases ...

i2c/spi devices in the devicetree often come with a "vendor,device"
comaptible string. These do not match in barebox, so add a
device_match_of_modalias function which does exactly that.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

spi: Get bus_num from devicetree ...

Get the bus_num from devicetree if a "spi" alias exists.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

spi: support dynamic bus ids ...

When probing spi bus masters from devicetree they got a bus_num
of -1. This works with a single bus master only since all bus masters
had the same bus_num. Detect this and dynamically assign a valid
bus_num.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

spi: Call spi_of_register_slaves from core ...

Makes individual handling of OF spi slaves unnecessary in the bus drivers.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

spi: Reuse "driver_match" for SPI bus ...

This will allow to use device_ids and make code a bit smaller.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

OF: base: convert and remove device_node_for_nach_child ...

Remove device_node_for_nach_child and convert users to corresponding
imported OF API functions.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

OF: base: sync of_find_property with linux OF API ...

To start synchronizing OF API of barebox with linux OF API, this adds
a length pointer to of_find_property. Also all current users of that
function are updated to reflect the API change.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

spi: improve devicetree support ...

- zero spi_board_info structure to not accidently pass
  unitilialized fields
- parse spi-max-frequency property from devicetree
- parse mode flags from devicetree

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

drivers/base: fix corrupt device tree ...

dev_add_child is a very unsafe function. If called multiple times
it allows setting the same device to different parents thus corrupting
the siblings list. This happens regularly since:

| commit c2e568d
| Author: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
| Date:   Sat Nov 3 16:11:05 2012 +0100
|
|    bus: add bus device
|
|    automatically add it as parent of any bus device if none already specified
|
|    we have now a nice output per bus

If for example a FATfs is mounted this nice output per bus often ends with:

>     `---- fat0
>     `---- 0
>          `---- 0x86f0000087020031-0x86f000410df27124: /dev/<NULL>
>          `---- sram00
>               `---- 0x00000000-0xffffffffffffffff: /dev/<NULL>
>               `---- 0x00000000-0xffffffffffffffff: /dev/<NULL>
>               unable to handle NULL pointer dereference at address 0x0000000c
> pc : [<87f08a20>]    lr : [<87f08a04>]
> sp : 86eff8c0  ip : 87f3fbde  fp : ffffffff
> r10: ffffffff  r9 : 00000000  r8 : 00000003
> r7 : 86f075b8  r6 : 00000002  r5 : ffffffec  r4 : 86f07544
> r3 : 00000000  r2 : 43f900b4  r1 : 00000020  r0 : 00000005
> Flags: Nzcv  IRQs off  FIQs off  Mode SVC_32
> [<87f08a20>] (do_devinfo_subtree+0x90/0x130) from [<87f08a90>] (do_devinfo_subtree+0x100/0x130)
>
> [<87f3e070>] (unwind_backtrace+0x0/0x90) from [<87f28514>] (panic+0x28/0x3c)
> [<87f28514>] (panic+0x28/0x3c) from [<87f3e4b8>] (do_exception+0x10/0x14)
> [<87f3e4b8>] (do_exception+0x10/0x14) from [<87f3e544>] (do_data_abort+0x2c/0x38)
> [<87f3e544>] (do_data_abort+0x2c/0x38) from [<87f3e268>] (data_abort+0x48/0x60)

This patch fixes this by adding a device to its parents children list in
register_device so that dev_add_child is no longer needed. This function
is removed from the tree. Now callers of register_device have to clearly
set the parent *before* registering a device.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Reported-by: Jan Lübbe <jlu@pengutronix.de>

spi: introduce spi_get_master ...

so we can request a master usefull for the spi command

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/remove-fsf-address' ...

Conflicts:
	drivers/net/miidev.c
	include/miidev.h

spi: switch from printf back to debug ...

Commit 5888a3b accidentally changed
this to printf.

Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

driver: register bus ...

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Treewide: remove address of the Free Software Foundation ...

The FSF address has changed in the past. Instead of updating it
each time the address changes, just drop it completely treewide.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

spi: add oftree support ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

SPI: Put SPI devices on their own bus ...

This patch adds a SPI bus on which the SPI devices and drivers register.
This makes it cleaner as SPI devices won't accidently end up probed by
a platform_device driver.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

drivers/spi/spi.c: use DEVICE_ID_DYNAMIC when allocating a struct device_d ...

This causes allocation of a free id and avoids conflicts if multiple
identical SPI devices are attached.

Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

spi: enfore default bits_per_word value ...

Documentation says it should default to 8 when not specified
explicitly by the device data.

Signed-off-by: Paul Fertser <fercerpav@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

spi: let master a chance to setup device before registering it ...

Call setup() before registering the device because registering leads
to a probe routine of the slave device and that requires an
initialised master.

Signed-off-by: Paul Fertser <fercerpav@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

spi: make the spi devices children of the parent bus ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

spi: unregister dev if master->setup fails ...

If the device setup executed by the spi master fails,
unregister the created device.

Signed-off-by: Franck Jullien <franck.jullien@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

spi: add bits_per_word to proxy structure ...

During the creation of a new spi device, we need to
have the possiblility to give the bits_per_word value
to master->setup.

As a matter of fact, spi master could check the spi
device bits_per_word and compare this value against its
capabilities.

Signed-off-by: Franck Jullien <franck.jullien@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

spi: add more spi transfer functions ...

This commit adds the following spi transfer functions:
  - spi_write
  - spi_read
  - spi_write_then_read
  - spi_w8r8

The code has been ported from the linux kernel.

Signed-off-by: Hubert Feurstein <h.feurstein@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

spi: add platform_data pointer to spi_board_info ...

In the spi layer this pointer will be assigned to the
platform_data pointer of the new spi device, thus it can
be accessed in the drivers 'probe' handler.

Signed-off-by: Hubert Feurstein <h.feurstein@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

spi: dev->id is an int, not a string, fix debug output ...

Also convert __FUNCTION__ -> __func__

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

spi: remove bogus setup of proxy device ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>