mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
3a7c45f6a7
Boards such as qemu-riscv, which receive their device tree at runtime, for example from QEMU or firmware, are unable to add the appropriate device tree properties to make devices available pre relocation. Instead, they must rely on the DM_FLAG_PRE_RELOC flag to be set for the required drivers. Add the DM_FLAG_PRE_RELOC flag to the simple-bus driver to make devices under it with drivers that have set the flag as well available pre relocation for these boards. Signed-off-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Bin Meng <bmeng.cn@gmail.com>
65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (c) 2014 Google, Inc
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
|
|
struct simple_bus_plat {
|
|
u32 base;
|
|
u32 size;
|
|
u32 target;
|
|
};
|
|
|
|
fdt_addr_t simple_bus_translate(struct udevice *dev, fdt_addr_t addr)
|
|
{
|
|
struct simple_bus_plat *plat = dev_get_uclass_platdata(dev);
|
|
|
|
if (addr >= plat->base && addr < plat->base + plat->size)
|
|
addr = (addr - plat->base) + plat->target;
|
|
|
|
return addr;
|
|
}
|
|
|
|
static int simple_bus_post_bind(struct udevice *dev)
|
|
{
|
|
#if CONFIG_IS_ENABLED(OF_PLATDATA)
|
|
return 0;
|
|
#else
|
|
u32 cell[3];
|
|
int ret;
|
|
|
|
ret = dev_read_u32_array(dev, "ranges", cell, ARRAY_SIZE(cell));
|
|
if (!ret) {
|
|
struct simple_bus_plat *plat = dev_get_uclass_platdata(dev);
|
|
|
|
plat->base = cell[0];
|
|
plat->target = cell[1];
|
|
plat->size = cell[2];
|
|
}
|
|
|
|
return dm_scan_fdt_dev(dev);
|
|
#endif
|
|
}
|
|
|
|
UCLASS_DRIVER(simple_bus) = {
|
|
.id = UCLASS_SIMPLE_BUS,
|
|
.name = "simple_bus",
|
|
.post_bind = simple_bus_post_bind,
|
|
.per_device_platdata_auto_alloc_size = sizeof(struct simple_bus_plat),
|
|
};
|
|
|
|
static const struct udevice_id generic_simple_bus_ids[] = {
|
|
{ .compatible = "simple-bus" },
|
|
{ .compatible = "simple-mfd" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(simple_bus_drv) = {
|
|
.name = "generic_simple_bus",
|
|
.id = UCLASS_SIMPLE_BUS,
|
|
.of_match = generic_simple_bus_ids,
|
|
.flags = DM_FLAG_PRE_RELOC,
|
|
};
|