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https://github.com/AsahiLinux/u-boot
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a02af4aeec
Add a new 'demo light' command which uses GPIOs to control imaginary lights. Each light is assigned a bit number in the overall value. This provides an example driver for using the new GPIO API. Signed-off-by: Simon Glass <sjg@chromium.org>
79 lines
1.4 KiB
C
79 lines
1.4 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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.name = "demo",
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.id = UCLASS_DEMO,
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};
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int demo_hello(struct udevice *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 udevice *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_get_light(struct udevice *dev)
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{
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const struct demo_ops *ops = device_get_ops(dev);
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if (!ops->get_light)
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return -ENOSYS;
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return ops->get_light(dev);
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}
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int demo_set_light(struct udevice *dev, int light)
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{
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const struct demo_ops *ops = device_get_ops(dev);
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if (!ops->set_light)
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return -ENOSYS;
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return ops->set_light(dev, light);
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}
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int demo_parse_dt(struct udevice *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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