of: add a function to remove an of_fixup ...

This function is needed when a device that already registered a fixup in
the probe routine fails later to probe completely. Without unregistering
the fixup the function might later be called with invalid data.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/of-device-id'

of: use 'const void *' for struct of_device_id.data ...

Since 2011 barebox' of_device_id struct uses unsigned long type for data field:

    struct of_device_id {
            char *compatible;
            unsigned long data;
    };

Almost always struct of_device_id.data field are used as pointer
and need 'unsigned long' casting.

E.g. see 'git grep -A 4 of_device_id drivers/' output:

    drivers/ata/sata-imx.c:static __maybe_unused struct of_device_id imx_sata_dt_ids[] = {
    drivers/ata/sata-imx.c- {
    drivers/ata/sata-imx.c-         .compatible = "fsl,imx6q-ahci",
    drivers/ata/sata-imx.c-         .data = (unsigned long)&data_imx6,
    drivers/ata/sata-imx.c- }, {

Here is of_device_id struct in linux kernel v4.0:

    struct of_device_id {
            char name[32];
            char type[32];
            char compatible[128];
            const void *data;
    };

Changing of_device_id.data type to 'const void *data' will increase
barebox' linux kernel compatibility and decrease number of 'unsigned
long' casts.

Part of the patch was done using the 'coccinelle' tool with the
following semantic patch:

    @rule1@
    identifier dev;
    identifier type;
    identifier func;
    @@
    func(...) {
    <...
    - dev_get_drvdata(dev, (unsigned long *)&type)
    + dev_get_drvdata(dev, (const void **)&type)
    ...>
    }
    @rule2@
    identifier dev;
    identifier type;
    identifier func;
    identifier data;
    @@
    func(...) {
    <...
    - dev_get_drvdata(dev, (unsigned long *)&type->data)
    + dev_get_drvdata(dev, (const void **)&type->data)
    ...>
    }

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of_path: of_find_path(): add possibility to return .bb device ...

This patch adds a flags argument to the of_find_path() function. The only flag
defined for now is OF_FIND_PATH_FLAGS_BB. When used on NAND devices, the
function returns the bad block aware device (the ".bb" device).

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

include: add includes includes to make fdt.h, of.h and state.h self contained ...

Otherwise compilation may fail with:

include/fdt.h:11:15: error: unknown type name 'uint64_t'
 static inline uint64_t fdt64_to_cpu(uint64_t x)

include/of.h:22:19: error: field 'list' has incomplete type
  struct list_head list;

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/sandbox-of'

of: add no-op functions for of_find_node_by_alias() and of_find_node_by_path_or_alias() ...

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: add no-op function for of_register_fixup() ...

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: Add for_each_child_of_node_safe ...

Needed for iterating over child nodes and deleting the children.

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

fdt: of_unflatten_dtb can work on const data ...

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

of: Add of_device_enable_and_register functions ...

Function to enable and register a disabled device.
The devices can be registered using the
device node with of_device_enable_and_register() or
with the device node name/path by using the
of_device_enable_and_register_by_name() function.

Signed-off-by: Teresa Gámez <t.gamez@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: Added of_set_property_to_child_phandle ...

Set a property to a phandle of a child node. This may be used
for selections like display-timings.

Signed-off-by: Teresa Gámez <t.gamez@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: base: Add of_parse_phandle_from ...

Added of_parse_phandle_from() to be able to use external root nodes.

Signed-off-by: Teresa Gámez <t.gamez@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: base: Add of_find_node_by_phandle_from ...

Added of_find_node_by_phandle_from() to find nodes by
phandle with a given root node.

Signed-off-by: Teresa Gámez <t.gamez@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: base: Add for_each_node_by_name_from ...

Added for_each_node_by_name_from() to be able to
pass external root node.

Signed-off-by: Teresa Gámez <t.gamez@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: Drop devicetree merge support ...

I assume I am the only person knowing that barebox is able to
merge devicetrees. This feature seems broken for a while now since
trying to merge devicetress results in:

unflatten: too many end nodes

Remove this feature to save the complexity.

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

Merge branch 'for-next/rpi'

of: Add a context pointer to fixup functions ...

If drivers want to fixup their specific instance they need some context
to know which instance they have to fixup.

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

of: simplify phandle lookup ...

Instead of populating an extra list containing all phandles just iterate
over the whole tree. This is done as preparation for more dynamic devicetrees
where parts are loaded at runtime. Here we don't want to keep the list of
phandles in sync.

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

of: base: import of_find_node_by_type ...

Import of_find_node_by_type from Linux drivers/of/base.c -
commit id d8dfad3.
This function retrieves a node pointer based on the "device_type"
property of the node.

This is used by device tree update functions in PPC support.

Signed-off-by: Renaud Barbier <renaud.barbier@ge.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: introduce some new helpers ...

of_get_tree_max_phandle - get the maximum phandle of a tree. Needed for
                          creating new phandles without conflicts.
of_node_create_phandle - create a phandle for a node which doesn't have one.
of_find_node_by_alias - find a node by alias name
of_find_node_by_path_or_alias - find a node by full path or alias name
of_find_root_node - find the root node for a given device node

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

Add configurability via devicetree ...

This adds the possibility to configure the place for the environment
from the devicetree and to partition devices from the devicetree.

Configuration has the general form of devices with a regular compatible
property. This allows to later add additional drivers or drivers with
different behaviour (for example to add support for redundant environment).

The configuration is all in the /chosen/barebox/ hierarchy of the
devicetree. This separates the configuration from the hardware
description. Also it makes it possible to store the configuration
in a completely separate devicetree (or devicetree overlay). For
the same reason all configuration is done using nodepathes rather
than phandles.

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

of: Add convenience functions to en/disable devicenodes ...

These functions allow to manipulate the "status" property of
devicenodes effectively enabling/disabling devices.

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

of: partitions: factor out function to parse a single partition ...

To make it usable for other code.

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

of: export of_default_bus_match_table ...

For code which wants to call of_platform_populate.

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

OF: base: rename of_free to of_delete_node ...

of_free is misleading about the actual purpose of the function. There is
already a of_create_node counterpart, so rename of_free to of_create_node
and update all users accordingly.

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

OF: remove device and resource pointer from struct device_node ...

struct device_node has its own resources and a pointer to associated
device_d. With recent platform related OF code, we can convert the
only user of it and remove those pointers from struct device_node.

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

OF: gpio: convert DT based gpio handling to new OF API ...

This creates a Linux OF API compatible counterpart of of_get_named_gpio_flags.
Existing of_get_named_gpio is converted to a static inline function, which is
in the corresponding of_gpio.h include. While at it, drivers/of/gpio.c is
also renamed to drivers/of/of_gpio.c to follow the of_ prefix naming scheme.
The new include is also added to existing users of of_get_named_gpio.

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

OF: import bus/device related functions from Linux OF API ...

This imports some bus and device related functions from Linux OF API
with some modifcations for Barebox.

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

OF: base: move OF_ROOT_NODE_ defines to local OF code ...

OF_ROOT_NODE_* defines should not be used outside of base.c. Move them
to drivers/of/base.c to ensure they will not be used elsewhere.

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