Add new api to get device address based on index.
Signed-off-by: Mugunthan V N mugunthanvnm@ti.com --- drivers/core/device.c | 31 +++++++++++++++++++++++++++---- include/dm/device.h | 11 +++++++++++ 2 files changed, 38 insertions(+), 4 deletions(-)
diff --git a/drivers/core/device.c b/drivers/core/device.c index 758f390..d3b2570 100644 --- a/drivers/core/device.c +++ b/drivers/core/device.c @@ -581,17 +581,35 @@ const char *dev_get_uclass_name(struct udevice *dev) 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) fdt_addr_t addr;
if (CONFIG_IS_ENABLED(OF_TRANSLATE)) { const fdt32_t *reg; + int len = 0; + int na, ns;
- reg = fdt_getprop(gd->fdt_blob, dev->of_offset, "reg", NULL); - if (!reg) + na = fdt_address_cells(gd->fdt_blob, dev->parent->of_offset); + if (na < 1) { + debug("bad #address-cells\n"); 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 @@ -608,7 +626,7 @@ fdt_addr_t dev_get_addr(struct udevice *dev) addr = fdtdec_get_addr_size_auto_parent(gd->fdt_blob, dev->parent->of_offset, dev->of_offset, "reg", - 0, NULL); + index, NULL); if (CONFIG_IS_ENABLED(SIMPLE_BUS) && addr != FDT_ADDR_T_NONE) { if (device_get_uclass_id(dev->parent) == UCLASS_SIMPLE_BUS) addr = simple_bus_translate(dev->parent, addr); @@ -620,6 +638,11 @@ fdt_addr_t dev_get_addr(struct udevice *dev) #endif }
+fdt_addr_t dev_get_addr(struct udevice *dev) +{ + return dev_get_addr_index(dev, 0); +} + bool device_has_children(struct udevice *dev) { return !list_empty(&dev->child_head); diff --git a/include/dm/device.h b/include/dm/device.h index 28ba4ca..7a776c9 100644 --- a/include/dm/device.h +++ b/include/dm/device.h @@ -454,6 +454,17 @@ int device_find_next_child(struct udevice **devp); 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 * * @dev: Device to check