mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
118 lines
2.3 KiB
C
118 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Simulate an I2C port
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*
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* Copyright (c) 2014 Google, Inc
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <i2c.h>
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#include <asm/test.h>
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#include <dm/lists.h>
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#include <dm/device-internal.h>
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struct sandbox_i2c_priv {
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bool test_mode;
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};
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static int get_emul(struct udevice *dev, struct udevice **devp,
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struct dm_i2c_ops **opsp)
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{
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struct dm_i2c_chip *plat;
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struct udevice *child;
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int ret;
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*devp = NULL;
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*opsp = NULL;
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plat = dev_get_parent_platdata(dev);
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if (!plat->emul) {
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ret = dm_scan_fdt_dev(dev);
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if (ret)
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return ret;
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for (device_find_first_child(dev, &child); child;
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device_find_next_child(&child)) {
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if (device_get_uclass_id(child) != UCLASS_I2C_EMUL)
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continue;
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ret = device_probe(child);
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if (ret)
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return ret;
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break;
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}
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if (child)
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plat->emul = child;
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else
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return -ENODEV;
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}
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*devp = plat->emul;
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*opsp = i2c_get_ops(plat->emul);
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return 0;
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}
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void sandbox_i2c_set_test_mode(struct udevice *bus, bool test_mode)
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{
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struct sandbox_i2c_priv *priv = dev_get_priv(bus);
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priv->test_mode = test_mode;
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}
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static int sandbox_i2c_xfer(struct udevice *bus, struct i2c_msg *msg,
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int nmsgs)
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{
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struct dm_i2c_bus *i2c = dev_get_uclass_priv(bus);
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struct sandbox_i2c_priv *priv = dev_get_priv(bus);
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struct dm_i2c_ops *ops;
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struct udevice *emul, *dev;
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bool is_read;
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int ret;
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/* Special test code to return success but with no emulation */
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if (priv->test_mode && msg->addr == SANDBOX_I2C_TEST_ADDR)
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return 0;
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ret = i2c_get_chip(bus, msg->addr, 1, &dev);
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if (ret)
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return ret;
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ret = get_emul(dev, &emul, &ops);
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if (ret)
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return ret;
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if (priv->test_mode) {
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/*
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* For testing, don't allow writing above 100KHz for writes and
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* 400KHz for reads.
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*/
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is_read = nmsgs > 1;
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if (i2c->speed_hz > (is_read ? 400000 : 100000)) {
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debug("%s: Max speed exceeded\n", __func__);
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return -EINVAL;
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}
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}
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return ops->xfer(emul, msg, nmsgs);
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}
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static const struct dm_i2c_ops sandbox_i2c_ops = {
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.xfer = sandbox_i2c_xfer,
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};
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static const struct udevice_id sandbox_i2c_ids[] = {
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{ .compatible = "sandbox,i2c" },
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{ }
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};
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U_BOOT_DRIVER(i2c_sandbox) = {
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.name = "i2c_sandbox",
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.id = UCLASS_I2C,
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.of_match = sandbox_i2c_ids,
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.ops = &sandbox_i2c_ops,
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.priv_auto_alloc_size = sizeof(struct sandbox_i2c_priv),
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};
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