mirror of
https://github.com/AsahiLinux/u-boot
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80279fa129
At present we decode simple bus <ranges> using the following assumption: - parent #address-cells 1 - child #address-cells 1 - child #size-cells 1 However this might not always be the case. Update to use fdt_addr_t and fdt_size_t in 'struct simple_bus_plat', and use fdt_read_ranges() to correctly decode it according to the actual parent and child #address-cells / #size-cells under a Kconfig option CONFIG_SIMPLE_BUS_CORRECT_RANGE which can be turned on for any board that needs it. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
79 lines
1.7 KiB
C
79 lines
1.7 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 <asm/global_data.h>
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#include <dm.h>
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#include <dm/simple_bus.h>
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#include <fdt_support.h>
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DECLARE_GLOBAL_DATA_PTR;
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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_plat(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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struct simple_bus_plat *plat = dev_get_uclass_plat(dev);
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int ret;
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if (CONFIG_IS_ENABLED(SIMPLE_BUS_CORRECT_RANGE)) {
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uint64_t caddr, paddr, len;
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/* only read range index 0 */
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ret = fdt_read_range((void *)gd->fdt_blob, dev_of_offset(dev),
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0, &caddr, &paddr, &len);
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if (!ret) {
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plat->base = caddr;
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plat->target = paddr;
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plat->size = len;
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}
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} else {
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u32 cell[3];
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ret = dev_read_u32_array(dev, "ranges", cell,
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ARRAY_SIZE(cell));
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if (!ret) {
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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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}
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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_plat_auto = sizeof(struct simple_bus_plat),
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};
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#if !CONFIG_IS_ENABLED(OF_PLATDATA)
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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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#endif
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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 = of_match_ptr(generic_simple_bus_ids),
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.flags = DM_FLAG_PRE_RELOC,
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};
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