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https://github.com/brain-hackers/u-boot-brain
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ad0e804843
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>
44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2016 Peng Fan <van.freenix@gmail.com>
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*/
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#include <common.h>
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#include <dm.h>
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#include <dm/pinctrl.h>
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#include "pinctrl-imx.h"
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static struct imx_pinctrl_soc_info imx7_pinctrl_soc_info;
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static struct imx_pinctrl_soc_info imx7_lpsr_pinctrl_soc_info = {
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.flags = ZERO_OFFSET_VALID,
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};
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static int imx7_pinctrl_probe(struct udevice *dev)
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{
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struct imx_pinctrl_soc_info *info =
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(struct imx_pinctrl_soc_info *)dev_get_driver_data(dev);
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return imx_pinctrl_probe(dev, info);
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}
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static const struct udevice_id imx7_pinctrl_match[] = {
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{ .compatible = "fsl,imx7d-iomuxc", .data = (ulong)&imx7_pinctrl_soc_info },
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{ .compatible = "fsl,imx7d-iomuxc-lpsr", .data = (ulong)&imx7_lpsr_pinctrl_soc_info },
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{ /* sentinel */ }
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};
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U_BOOT_DRIVER(imx7_pinctrl) = {
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.name = "imx7-pinctrl",
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.id = UCLASS_PINCTRL,
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.of_match = of_match_ptr(imx7_pinctrl_match),
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.probe = imx7_pinctrl_probe,
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.remove = imx_pinctrl_remove,
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.priv_auto_alloc_size = sizeof(struct imx_pinctrl_priv),
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.ops = &imx_pinctrl_ops,
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#if !CONFIG_IS_ENABLED(OF_CONTROL)
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.flags = DM_FLAG_PRE_RELOC,
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#endif
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};
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