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https://github.com/brain-hackers/u-boot-brain
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5381c2856d
Since there is no canonical "board device" that can be used in board files, it is difficult to use DM function for board initialization in these cases. Hence, add a uclass that implements a simple "board device", which can hold devices not suitable anywhere else in the device tree, and is also able to read encoded information, e.g. hard-wired GPIOs on a GPIO expander, read-only memory ICs, etc. that carry information about the hardware. The devices of this uclass expose methods to read generic data types (integers, strings, booleans) to encode the information provided by the hardware. Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Mario Six <mario.six@gdsys.cc>
61 lines
1.1 KiB
C
61 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2017
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* Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc
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*/
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#include <common.h>
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#include <dm.h>
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#include <board.h>
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int board_get(struct udevice **devp)
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{
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return uclass_first_device_err(UCLASS_BOARD, devp);
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}
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int board_detect(struct udevice *dev)
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{
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struct board_ops *ops = board_get_ops(dev);
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if (!ops->detect)
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return -ENOSYS;
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return ops->detect(dev);
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}
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int board_get_bool(struct udevice *dev, int id, bool *val)
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{
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struct board_ops *ops = board_get_ops(dev);
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if (!ops->get_bool)
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return -ENOSYS;
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return ops->get_bool(dev, id, val);
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}
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int board_get_int(struct udevice *dev, int id, int *val)
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{
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struct board_ops *ops = board_get_ops(dev);
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if (!ops->get_int)
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return -ENOSYS;
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return ops->get_int(dev, id, val);
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}
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int board_get_str(struct udevice *dev, int id, size_t size, char *val)
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{
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struct board_ops *ops = board_get_ops(dev);
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if (!ops->get_str)
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return -ENOSYS;
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return ops->get_str(dev, id, size, val);
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}
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UCLASS_DRIVER(board) = {
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.id = UCLASS_BOARD,
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.name = "board",
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.post_bind = dm_scan_fdt_dev,
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};
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