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https://github.com/brain-hackers/u-boot-brain
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ef329a6a73
When a driver declares DM_FLAG_PRE_RELOC flag, it wishes to be bound before relocation. However due to a bug in the DM core, the flag only takes effect when devices are statically declared via U_BOOT_DEVICE(). This bug has been fixed recently by commit "dm: core: Respect drivers with the DM_FLAG_PRE_RELOC flag in lists_bind_fdt()", but with the fix, it has a side effect that all existing drivers that declared DM_FLAG_PRE_RELOC flag will be bound before relocation now. This may expose potential boot failure on some boards due to insufficient memory during the pre-relocation stage. To mitigate this potential impact, the following changes are implemented: - Remove DM_FLAG_PRE_RELOC flag in the driver, if the driver only supports configuration from device tree (OF_CONTROL) - Keep DM_FLAG_PRE_RELOC flag in the driver only if the device is statically declared via U_BOOT_DEVICE() - Surround DM_FLAG_PRE_RELOC flag with OF_CONTROL check, for drivers that support both statically declared devices and configuration from device tree Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
48 lines
902 B
C
48 lines
902 B
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
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*
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* Reset driver for tangier processor
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*/
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#include <common.h>
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#include <dm.h>
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#include <sysreset.h>
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#include <asm/scu.h>
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static int tangier_sysreset_request(struct udevice *dev, enum sysreset_t type)
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{
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int value;
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switch (type) {
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case SYSRESET_WARM:
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value = IPCMSG_WARM_RESET;
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break;
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case SYSRESET_COLD:
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value = IPCMSG_COLD_RESET;
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break;
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default:
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return -ENOSYS;
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}
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scu_ipc_simple_command(value, 0);
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return -EINPROGRESS;
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}
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static const struct udevice_id tangier_sysreset_ids[] = {
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{ .compatible = "intel,reset-tangier" },
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{ }
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};
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static struct sysreset_ops tangier_sysreset_ops = {
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.request = tangier_sysreset_request,
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};
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U_BOOT_DRIVER(tangier_sysreset) = {
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.name = "tangier-sysreset",
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.id = UCLASS_SYSRESET,
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.of_match = tangier_sysreset_ids,
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.ops = &tangier_sysreset_ops,
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};
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