b8aa463e9b
Add a bootdev driver for MMC. It mostly just calls the bootdev helper function. Add a function to obtain the block device for an MMC controller. Fix up the comment for mmc_get_blk_desc() while we are here. Signed-off-by: Simon Glass <sjg@chromium.org>
63 lines
1.2 KiB
C
63 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Bootdevice for MMC
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*
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* Copyright 2021 Google LLC
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#include <common.h>
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#include <bootdev.h>
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#include <dm.h>
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#include <mmc.h>
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static int mmc_get_bootflow(struct udevice *dev, struct bootflow_iter *iter,
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struct bootflow *bflow)
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{
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struct udevice *mmc_dev = dev_get_parent(dev);
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struct udevice *blk;
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int ret;
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ret = mmc_get_blk(mmc_dev, &blk);
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/*
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* If there is no media, indicate that no more partitions should be
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* checked
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*/
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if (ret == -EOPNOTSUPP)
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ret = -ESHUTDOWN;
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if (ret)
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return log_msg_ret("blk", ret);
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assert(blk);
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ret = bootdev_find_in_blk(dev, blk, iter, bflow);
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if (ret)
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return log_msg_ret("find", ret);
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return 0;
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}
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static int mmc_bootdev_bind(struct udevice *dev)
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{
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struct bootdev_uc_plat *ucp = dev_get_uclass_plat(dev);
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ucp->prio = BOOTDEVP_0_INTERNAL_FAST;
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return 0;
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}
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struct bootdev_ops mmc_bootdev_ops = {
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.get_bootflow = mmc_get_bootflow,
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};
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static const struct udevice_id mmc_bootdev_ids[] = {
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{ .compatible = "u-boot,bootdev-mmc" },
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{ }
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};
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U_BOOT_DRIVER(mmc_bootdev) = {
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.name = "mmc_bootdev",
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.id = UCLASS_BOOTDEV,
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.ops = &mmc_bootdev_ops,
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.bind = mmc_bootdev_bind,
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.of_match = mmc_bootdev_ids,
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};
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