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| author |  Oreoluwa Babatunde <quic_obabatun@quicinc.com>
| 2024-05-02 12:24:03 -0700 |
|---|---|---|
| committer |  Rob Herring (Arm) <robh@kernel.org>
| 2024-05-03 07:49:13 -0500 |
| commit | c56436ef17520c5fb0f9c2fc47aa961a7946895f (patch) | |
| tree | 29f7e46d012ecee6067d5d86db04c72a199fcc65 /drivers/of | |
| parent | of: property: fw_devlink: Add support for "power-supplies" binding (diff) | |
| download | linux-c56436ef17520c5fb0f9c2fc47aa961a7946895f.tar.gz linux-c56436ef17520c5fb0f9c2fc47aa961a7946895f.tar.bz2 linux-c56436ef17520c5fb0f9c2fc47aa961a7946895f.zip | |
of: reserved_mem: Remove the use of phandle from the reserved_mem APIs
The __find_rmem() function is the only place that references the phandle
field of the reserved_mem struct. __find_rmem() is used to match a
device_node object to its corresponding entry in the reserved_mem array
using its phandle value. But, there is already a function called
of_reserved_mem_lookup() which carries out the same action using the
name of the node.
Using the of_reserved_mem_lookup() function is more reliable because
every node is guaranteed to have a name, but not all nodes will have a
phandle.
Nodes are only assigned a phandle if they are explicitly defined in the
DT using "phandle = <phandle_number>", or if they are referenced by
another node in the DT. Hence, If the phandle field is empty, then
__find_rmem() will return a false negative.
Hence, delete the __find_rmem() function and switch to using the
of_reserved_mem_lookup() function to find the corresponding entry of a
device_node in the reserved_mem array. Since the phandle field of the
reserved_mem struct is now unused, delete that as well.
Signed-off-by: Oreoluwa Babatunde <quic_obabatun@quicinc.com>
Link: https://lore.kernel.org/r/20240502192403.3307277-1-quic_obabatun@quicinc.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Diffstat (limited to 'drivers/of')
| -rw-r--r-- | drivers/of/of_reserved_mem.c | 22 |
1 files changed, 1 insertions, 21 deletions
diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c index 8236ecae2953..46e1c3fbc769 100644 --- a/drivers/of/of_reserved_mem.c +++ b/drivers/of/of_reserved_mem.c @@ -437,17 +437,10 @@ void __init fdt_init_reserved_mem(void) for (i = 0; i < reserved_mem_count; i++) { struct reserved_mem *rmem = &reserved_mem[i]; unsigned long node = rmem->fdt_node; - int len; - const __be32 *prop; int err = 0; bool nomap; nomap = of_get_flat_dt_prop(node, "no-map", NULL) != NULL; - prop = of_get_flat_dt_prop(node, "phandle", &len); - if (!prop) - prop = of_get_flat_dt_prop(node, "linux,phandle", &len); - if (prop) - rmem->phandle = of_read_number(prop, len/4); if (rmem->size == 0) err = __reserved_mem_alloc_size(node, rmem->name, @@ -477,19 +470,6 @@ void __init fdt_init_reserved_mem(void) } } -static inline struct reserved_mem *__find_rmem(struct device_node *node) -{ - unsigned int i; - - if (!node->phandle) - return NULL; - - for (i = 0; i < reserved_mem_count; i++) - if (reserved_mem[i].phandle == node->phandle) - return &reserved_mem[i]; - return NULL; -} - struct rmem_assigned_device { struct device *dev; struct reserved_mem *rmem; @@ -534,7 +514,7 @@ int of_reserved_mem_device_init_by_idx(struct device *dev, return 0; } - rmem = __find_rmem(target); + rmem = of_reserved_mem_lookup(target); of_node_put(target); if (!rmem || !rmem->ops || !rmem->ops->device_init) |