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https://github.com/u-boot/u-boot.git
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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
97 lines
2.5 KiB
C
97 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2014 Google, Inc
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*/
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#define LOG_CATEGORY UCLASS_I2C_EMUL
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#include <common.h>
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#include <dm.h>
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#include <i2c.h>
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#include <log.h>
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#include <asm/i2c.h>
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#include <dm/device-internal.h>
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#include <dm/uclass-internal.h>
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/*
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* i2c emulation works using an 'emul' node at the bus level. Each device in
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* that node is in the UCLASS_I2C_EMUL uclass, and emulates one i2c device. A
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* pointer to the device it emulates is in the 'dev' property of the emul device
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* uclass plat (struct i2c_emul_plat), put there by i2c_emul_find().
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* When sandbox wants an emulator for a device, it calls i2c_emul_find() which
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* searches for the emulator with the correct address. To find the device for an
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* emulator, call i2c_emul_get_device().
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*
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* The 'emul' node is in the UCLASS_I2C_EMUL_PARENT uclass. We use a separate
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* uclass so avoid having strange devices on the I2C bus.
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*/
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struct udevice *i2c_emul_get_device(struct udevice *emul)
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{
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struct i2c_emul_uc_plat *uc_plat = dev_get_uclass_plat(emul);
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return uc_plat->dev;
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}
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void i2c_emul_set_idx(struct udevice *dev, int emul_idx)
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{
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struct dm_i2c_chip *plat = dev_get_parent_plat(dev);
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plat->emul_idx = emul_idx;
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}
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int i2c_emul_find(struct udevice *dev, struct udevice **emulp)
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{
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struct i2c_emul_uc_plat *uc_plat;
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struct udevice *emul;
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int ret;
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if (CONFIG_IS_ENABLED(OF_REAL)) {
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ret = uclass_find_device_by_phandle(UCLASS_I2C_EMUL, dev,
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"sandbox,emul", &emul);
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} else {
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struct dm_i2c_chip *plat = dev_get_parent_plat(dev);
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ret = device_get_by_ofplat_idx(plat->emul_idx, &emul);
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}
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if (ret) {
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log_err("No emulators for device '%s'\n", dev->name);
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return ret;
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}
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uc_plat = dev_get_uclass_plat(emul);
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uc_plat->dev = dev;
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*emulp = emul;
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return device_probe(emul);
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}
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UCLASS_DRIVER(i2c_emul) = {
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.id = UCLASS_I2C_EMUL,
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.name = "i2c_emul",
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.per_device_plat_auto = sizeof(struct i2c_emul_uc_plat),
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};
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/*
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* This uclass is a child of the i2c bus. Its plat is not defined here so
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* is defined by its parent, UCLASS_I2C, which uses struct dm_i2c_chip. See
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* per_child_plat_auto in UCLASS_DRIVER(i2c).
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*/
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UCLASS_DRIVER(i2c_emul_parent) = {
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.id = UCLASS_I2C_EMUL_PARENT,
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.name = "i2c_emul_parent",
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#if CONFIG_IS_ENABLED(OF_REAL)
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.post_bind = dm_scan_fdt_dev,
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#endif
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};
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static const struct udevice_id i2c_emul_parent_ids[] = {
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{ .compatible = "sandbox,i2c-emul-parent" },
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{ }
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};
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U_BOOT_DRIVER(sandbox_i2c_emul_parent) = {
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.name = "sandbox_i2c_emul_parent",
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.id = UCLASS_I2C_EMUL_PARENT,
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.of_match = i2c_emul_parent_ids,
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};
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