65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2014 Google, Inc
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*/
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#include <common.h>
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#include <dm.h>
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struct simple_bus_plat {
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u32 base;
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u32 size;
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u32 target;
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};
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fdt_addr_t simple_bus_translate(struct udevice *dev, fdt_addr_t addr)
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{
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struct simple_bus_plat *plat = dev_get_uclass_platdata(dev);
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if (addr >= plat->base && addr < plat->base + plat->size)
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addr = (addr - plat->base) + plat->target;
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return addr;
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}
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static int simple_bus_post_bind(struct udevice *dev)
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{
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#if CONFIG_IS_ENABLED(OF_PLATDATA)
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return 0;
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#else
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u32 cell[3];
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int ret;
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ret = dev_read_u32_array(dev, "ranges", cell, ARRAY_SIZE(cell));
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if (!ret) {
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struct simple_bus_plat *plat = dev_get_uclass_platdata(dev);
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plat->base = cell[0];
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plat->target = cell[1];
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plat->size = cell[2];
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}
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return dm_scan_fdt_dev(dev);
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#endif
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}
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UCLASS_DRIVER(simple_bus) = {
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.id = UCLASS_SIMPLE_BUS,
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.name = "simple_bus",
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.post_bind = simple_bus_post_bind,
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.per_device_platdata_auto_alloc_size = sizeof(struct simple_bus_plat),
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};
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static const struct udevice_id generic_simple_bus_ids[] = {
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{ .compatible = "simple-bus" },
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{ .compatible = "simple-mfd" },
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{ }
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};
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U_BOOT_DRIVER(simple_bus) = {
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.name = "simple_bus",
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.id = UCLASS_SIMPLE_BUS,
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.of_match = generic_simple_bus_ids,
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.flags = DM_FLAG_PRE_RELOC,
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};
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