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https://source.denx.de/u-boot/u-boot.git
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46b2e5e92c
This adds an NVMEM reboot mode driver, similar to Linux's implementation. This allows using the same device tree binding for Linux and U-Boot in most cases. Signed-off-by: Sean Anderson <sean.anderson@seco.com> Reviewed-by: Simon Glass <sjg@chromium.org>
58 lines
1.4 KiB
C
58 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2022 Sean Anderson <sean.anderson@seco.com>
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*/
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#include <common.h>
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#include <dm.h>
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#include <nvmem.h>
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#include <reboot-mode/reboot-mode.h>
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/**
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* struct nvmem_reboot_mode_priv - Private data for the nvmem reboot mode device
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* @cell: The nvmem cell to store the mode in
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*/
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struct nvmem_reboot_mode_priv {
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struct nvmem_cell cell;
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};
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static int reboot_mode_get(struct udevice *dev, u32 *mode)
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{
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struct nvmem_reboot_mode_priv *priv = dev_get_priv(dev);
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return nvmem_cell_read(&priv->cell, mode, sizeof(*mode));
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}
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static int reboot_mode_set(struct udevice *dev, u32 mode)
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{
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struct nvmem_reboot_mode_priv *priv = dev_get_priv(dev);
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return nvmem_cell_write(&priv->cell, &mode, sizeof(mode));
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}
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static const struct reboot_mode_ops nvmem_reboot_mode_ops = {
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.get = reboot_mode_get,
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.set = reboot_mode_set,
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};
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static int reboot_mode_probe(struct udevice *dev)
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{
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struct nvmem_reboot_mode_priv *priv = dev_get_priv(dev);
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return nvmem_cell_get_by_name(dev, "reboot-mode", &priv->cell);
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}
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static const struct udevice_id nvmem_reboot_mode_ids[] = {
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{ .compatible = "nvmem-reboot-mode" },
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{ }
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};
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U_BOOT_DRIVER(nvmem_reboot_mode) = {
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.name = "nvmem-reboot-mode",
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.id = UCLASS_REBOOT_MODE,
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.of_match = nvmem_reboot_mode_ids,
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.probe = reboot_mode_probe,
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.priv_auto = sizeof(struct nvmem_reboot_mode_priv),
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.ops = &nvmem_reboot_mode_ops,
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};
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