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dm: core: Add a new api to get indexed device address

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Add new api to get device address based on index.

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Acked-by: Jagan Teki <jteki@openedev.com>
[Rebased on master]
Signed-off-by: Jagan Teki <jteki@openedev.com>
This commit is contained in:
Mugunthan V N 2015-12-23 20:39:36 +05:30 • committed by Jagan Teki
parent 425846ed8f
commit 69b41388ba
2 changed files with 38 additions and 4 deletions
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31
drivers/core/device.c
View file

@ -581,17 +581,35 @@ const char *dev_get_uclass_name(struct udevice *dev)
return dev->uclass->uc_drv->name; return dev->uclass->uc_drv->name;
} }
fdt_addr_t dev_get_addr(struct udevice *dev) fdt_addr_t dev_get_addr_index(struct udevice *dev, int index)
{ {
#if CONFIG_IS_ENABLED(OF_CONTROL) #if CONFIG_IS_ENABLED(OF_CONTROL)
fdt_addr_t addr; fdt_addr_t addr;
if (CONFIG_IS_ENABLED(OF_TRANSLATE)) { if (CONFIG_IS_ENABLED(OF_TRANSLATE)) {
const fdt32_t *reg; const fdt32_t *reg;
int len = 0;
int na, ns;
reg = fdt_getprop(gd->fdt_blob, dev->of_offset, "reg", NULL); na = fdt_address_cells(gd->fdt_blob, dev->parent->of_offset);
if (!reg) if (na < 1) {
debug("bad #address-cells\n");
return FDT_ADDR_T_NONE; return FDT_ADDR_T_NONE;
}
ns = fdt_size_cells(gd->fdt_blob, dev->parent->of_offset);
if (ns < 0) {
debug("bad #size-cells\n");
return FDT_ADDR_T_NONE;
}
reg = fdt_getprop(gd->fdt_blob, dev->of_offset, "reg", &len);
if (!reg || (len <= (index * sizeof(fdt32_t) * (na + ns)))) {
debug("Req index out of range\n");
return FDT_ADDR_T_NONE;
}
reg += index * (na + ns);
/* /*
* Use the full-fledged translate function for complex * Use the full-fledged translate function for complex
@ -607,7 +625,7 @@ fdt_addr_t dev_get_addr(struct udevice *dev)
addr = fdtdec_get_addr_size_auto_parent(gd->fdt_blob, addr = fdtdec_get_addr_size_auto_parent(gd->fdt_blob,
dev->parent->of_offset, dev->parent->of_offset,
dev->of_offset, "reg", dev->of_offset, "reg",
0, NULL); index, NULL);
if (CONFIG_IS_ENABLED(SIMPLE_BUS) && addr != FDT_ADDR_T_NONE) { if (CONFIG_IS_ENABLED(SIMPLE_BUS) && addr != FDT_ADDR_T_NONE) {
if (device_get_uclass_id(dev->parent) == if (device_get_uclass_id(dev->parent) ==
UCLASS_SIMPLE_BUS) UCLASS_SIMPLE_BUS)
@ -629,6 +647,11 @@ fdt_addr_t dev_get_addr(struct udevice *dev)
#endif #endif
} }
fdt_addr_t dev_get_addr(struct udevice *dev)
{
return dev_get_addr_index(dev, 0);
}
bool device_has_children(struct udevice *dev) bool device_has_children(struct udevice *dev)
{ {
return !list_empty(&dev->child_head); return !list_empty(&dev->child_head);

11
include/dm/device.h
View file

@ -453,6 +453,17 @@ int device_find_next_child(struct udevice **devp);
*/ */
fdt_addr_t dev_get_addr(struct udevice *dev); fdt_addr_t dev_get_addr(struct udevice *dev);
/**
* dev_get_addr_index() - Get the indexed reg property of a device
*
* @dev: Pointer to a device
* @index: the 'reg' property can hold a list of <addr, size> pairs
* and @index is used to select which one is required
*
* @return addr
*/
fdt_addr_t dev_get_addr_index(struct udevice *dev, int index);
/** /**
* device_has_children() - check if a device has any children * device_has_children() - check if a device has any children
* *