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Merge patch series "dm: core: Avoid multiple calls to fdt_parent_offset()"

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Jonas Karlman <jonas@kwiboo.se> says:

Use of fdt_parent_offset() is very expensive as detailed by the function
documentation:

  NOTE: This function is expensive, as it must scan the device tree
  structure from the start to nodeoffset, *twice*.

This series remove multiple calls to fdt_parent_offset() or
ofnode_get_parent() when instead a single call can be made and the
returned value can be reused.

This series help reduce boot time by around:
- ~137ms on a Radxa ROCK Pi 4 (RK3399)
- ~33ms on a Radxa ZERO 3W (RK3566)
This commit is contained in:
Tom Rini
2024-08-27 14:32:54 -06:00
parent b70865e6b9 6f5b168661
commit 314fdd2e73
3 changed files with 30 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
drivers/core/fdtaddr.c
View File

@@ -19,11 +19,10 @@
DECLARE_GLOBAL_DATA_PTR;
fdt_addr_t devfdt_get_addr_index(const struct udevice *dev, int index)
#if CONFIG_IS_ENABLED(OF_REAL) || CONFIG_IS_ENABLED(OF_CONTROL)
fdt_addr_t devfdt_get_addr_index_parent(const struct udevice *dev, int index,
int offset, int parent)
{
#if CONFIG_IS_ENABLED(OF_REAL)
int offset = dev_of_offset(dev);
int parent = fdt_parent_offset(gd->fdt_blob, offset);
fdt_addr_t addr;
if (CONFIG_IS_ENABLED(OF_TRANSLATE)) {
@@ -89,6 +88,15 @@ fdt_addr_t devfdt_get_addr_index(const struct udevice *dev, int index)
#endif
return addr;
}
#endif
fdt_addr_t devfdt_get_addr_index(const struct udevice *dev, int index)
{
#if CONFIG_IS_ENABLED(OF_REAL)
int offset = dev_of_offset(dev);
int parent = fdt_parent_offset(gd->fdt_blob, offset);
return devfdt_get_addr_index_parent(dev, index, offset, parent);
#else
return FDT_ADDR_T_NONE;
#endif
@@ -113,14 +121,16 @@ fdt_addr_t devfdt_get_addr_size_index(const struct udevice *dev, int index,
* next call to the exisiting dev_get_xxx function which handles
* all config options.
*/
fdtdec_get_addr_size_auto_noparent(gd->fdt_blob, dev_of_offset(dev),
"reg", index, size, false);
int offset = dev_of_offset(dev);
int parent = fdt_parent_offset(gd->fdt_blob, offset);
fdtdec_get_addr_size_auto_parent(gd->fdt_blob, parent, offset,
"reg", index, size, false);
/*
* Get the base address via the existing function which handles
* all Kconfig cases
*/
return devfdt_get_addr_index(dev, index);
return devfdt_get_addr_index_parent(dev, index, offset, parent);
#else
return FDT_ADDR_T_NONE;
#endif

5
drivers/core/ofnode.c
View File

@@ -762,8 +762,9 @@ static fdt_addr_t __ofnode_get_addr_size_index(ofnode node, int index,
return of_read_number(prop_val, na);
}
} else {
na = ofnode_read_simple_addr_cells(ofnode_get_parent(node));
ns = ofnode_read_simple_size_cells(ofnode_get_parent(node));
ofnode parent = ofnode_get_parent(node);
na = ofnode_read_simple_addr_cells(parent);
ns = ofnode_read_simple_size_cells(parent);
return fdtdec_get_addr_size_fixed(ofnode_to_fdt(node),
ofnode_to_offset(node), "reg",
index, na, ns, size,

14
drivers/core/regmap.c
View File

@@ -168,18 +168,21 @@ static int init_range(ofnode node, struct regmap_range *range, int addr_len,
int regmap_init_mem_index(ofnode node, struct regmap **mapp, int index)
{
ofnode parent;
struct regmap *map;
int addr_len, size_len;
int ret;
addr_len = ofnode_read_simple_addr_cells(ofnode_get_parent(node));
parent = ofnode_get_parent(node);
addr_len = ofnode_read_simple_addr_cells(parent);
if (addr_len < 0) {
dm_warn("%s: Error while reading the addr length (ret = %d)\n",
ofnode_get_name(node), addr_len);
return addr_len;
}
size_len = ofnode_read_simple_size_cells(ofnode_get_parent(node));
size_len = ofnode_read_simple_size_cells(parent);
if (size_len < 0) {
dm_warn("%s: Error while reading the size length: (ret = %d)\n",
ofnode_get_name(node), size_len);
@@ -241,6 +244,7 @@ int regmap_init_mem_range(ofnode node, ulong r_start, ulong r_size,
int regmap_init_mem(ofnode node, struct regmap **mapp)
{
ofnode parent;
struct regmap_range *range;
struct regmap *map;
int count;
@@ -249,14 +253,16 @@ int regmap_init_mem(ofnode node, struct regmap **mapp)
int index;
int ret;
addr_len = ofnode_read_simple_addr_cells(ofnode_get_parent(node));
parent = ofnode_get_parent(node);
addr_len = ofnode_read_simple_addr_cells(parent);
if (addr_len < 0) {
dm_warn("%s: Error while reading the addr length (ret = %d)\n",
ofnode_get_name(node), addr_len);
return addr_len;
}
size_len = ofnode_read_simple_size_cells(ofnode_get_parent(node));
size_len = ofnode_read_simple_size_cells(parent);
if (size_len < 0) {
dm_warn("%s: Error while reading the size length: (ret = %d)\n",
ofnode_get_name(node), size_len);