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https://github.com/brain-hackers/u-boot-brain
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39f7611fec
As an example of how to write a uclass and a driver, provide a demo version of each, accessible through the 'demo' command. To use these with driver model, define CONFIG_CMD_DEMO and CONFIG_DM_DEMO. The two demo drivers are enabled with CONFIG_DM_DEMO_SIMPLE and CONFIG_DM_DEMO_SHAPE. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Marek Vasut <marex@denx.de> Signed-off-by: Pavel Herrmann <morpheus.ibis@gmail.com> Signed-off-by: Viktor Křivák <viktor.krivak@gmail.com> Signed-off-by: Tomas Hlavacek <tmshlvck@gmail.com>
59 lines
1.1 KiB
C
59 lines
1.1 KiB
C
/*
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* Copyright (c) 2013 Google, Inc
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*
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* (C) Copyright 2012
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* Pavel Herrmann <morpheus.ibis@gmail.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <dm.h>
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#include <dm-demo.h>
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#include <errno.h>
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#include <fdtdec.h>
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#include <malloc.h>
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#include <asm/io.h>
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#include <linux/list.h>
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DECLARE_GLOBAL_DATA_PTR;
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UCLASS_DRIVER(demo) = {
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.id = UCLASS_DEMO,
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};
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int demo_hello(struct device *dev, int ch)
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{
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const struct demo_ops *ops = device_get_ops(dev);
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if (!ops->hello)
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return -ENOSYS;
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return ops->hello(dev, ch);
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}
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int demo_status(struct device *dev, int *status)
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{
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const struct demo_ops *ops = device_get_ops(dev);
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if (!ops->status)
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return -ENOSYS;
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return ops->status(dev, status);
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}
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int demo_parse_dt(struct device *dev)
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{
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struct dm_demo_pdata *pdata = dev_get_platdata(dev);
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int dn = dev->of_offset;
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pdata->sides = fdtdec_get_int(gd->fdt_blob, dn, "sides", 0);
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pdata->colour = fdt_getprop(gd->fdt_blob, dn, "colour", NULL);
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if (!pdata->sides || !pdata->colour) {
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debug("%s: Invalid device tree data\n", __func__);
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return -EINVAL;
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}
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return 0;
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}
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