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@@ -24,7 +24,6 @@
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(c) 2013 Wolfram Sang <wsa@the-dreams.de>
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I2C ACPI code Copyright (C) 2014 Intel Corp
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Author: Lan Tianyu <tianyu.lan@intel.com>
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- I2C slave support (c) 2014 by Wolfram Sang <wsa@sang-engineering.com>
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*/
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#define pr_fmt(fmt) "i2c-core: " fmt
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@@ -1213,7 +1212,7 @@ static int i2c_check_addr_validity(unsigned addr, unsigned short flags)
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* device uses a reserved address, then it shouldn't be probed. 7-bit
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* addressing is assumed, 10-bit address devices are rare and should be
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* explicitly enumerated. */
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-static int i2c_check_7bit_addr_validity_strict(unsigned short addr)
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+int i2c_check_7bit_addr_validity_strict(unsigned short addr)
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{
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/*
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* Reserved addresses per I2C specification:
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@@ -3727,105 +3726,6 @@ s32 i2c_smbus_read_i2c_block_data_or_emulated(const struct i2c_client *client,
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}
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EXPORT_SYMBOL(i2c_smbus_read_i2c_block_data_or_emulated);
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-#if IS_ENABLED(CONFIG_I2C_SLAVE)
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-int i2c_slave_register(struct i2c_client *client, i2c_slave_cb_t slave_cb)
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-{
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- int ret;
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-
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- if (!client || !slave_cb) {
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- WARN(1, "insufficient data\n");
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- return -EINVAL;
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- }
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-
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- if (!(client->flags & I2C_CLIENT_SLAVE))
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- dev_warn(&client->dev, "%s: client slave flag not set. You might see address collisions\n",
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- __func__);
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-
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- if (!(client->flags & I2C_CLIENT_TEN)) {
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- /* Enforce stricter address checking */
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- ret = i2c_check_7bit_addr_validity_strict(client->addr);
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- if (ret) {
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- dev_err(&client->dev, "%s: invalid address\n", __func__);
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- return ret;
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- }
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- }
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-
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- if (!client->adapter->algo->reg_slave) {
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- dev_err(&client->dev, "%s: not supported by adapter\n", __func__);
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- return -EOPNOTSUPP;
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- }
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-
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- client->slave_cb = slave_cb;
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-
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- i2c_lock_adapter(client->adapter);
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- ret = client->adapter->algo->reg_slave(client);
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- i2c_unlock_adapter(client->adapter);
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-
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- if (ret) {
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- client->slave_cb = NULL;
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- dev_err(&client->dev, "%s: adapter returned error %d\n", __func__, ret);
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- }
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-
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- return ret;
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-}
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-EXPORT_SYMBOL_GPL(i2c_slave_register);
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-
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-int i2c_slave_unregister(struct i2c_client *client)
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-{
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- int ret;
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-
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- if (!client->adapter->algo->unreg_slave) {
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- dev_err(&client->dev, "%s: not supported by adapter\n", __func__);
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- return -EOPNOTSUPP;
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- }
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-
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- i2c_lock_adapter(client->adapter);
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- ret = client->adapter->algo->unreg_slave(client);
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- i2c_unlock_adapter(client->adapter);
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-
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- if (ret == 0)
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- client->slave_cb = NULL;
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- else
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- dev_err(&client->dev, "%s: adapter returned error %d\n", __func__, ret);
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-
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- return ret;
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-}
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-EXPORT_SYMBOL_GPL(i2c_slave_unregister);
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-
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-/**
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- * i2c_detect_slave_mode - detect operation mode
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- * @dev: The device owning the bus
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- *
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- * This checks the device nodes for an I2C slave by checking the address
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- * used in the reg property. If the address match the I2C_OWN_SLAVE_ADDRESS
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- * flag this means the device is configured to act as a I2C slave and it will
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- * be listening at that address.
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- *
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- * Returns true if an I2C own slave address is detected, otherwise returns
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- * false.
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- */
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-bool i2c_detect_slave_mode(struct device *dev)
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-{
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- if (IS_BUILTIN(CONFIG_OF) && dev->of_node) {
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- struct device_node *child;
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- u32 reg;
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-
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- for_each_child_of_node(dev->of_node, child) {
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- of_property_read_u32(child, "reg", ®);
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- if (reg & I2C_OWN_SLAVE_ADDRESS) {
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- of_node_put(child);
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- return true;
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- }
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- }
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- } else if (IS_BUILTIN(CONFIG_ACPI) && ACPI_HANDLE(dev)) {
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- dev_dbg(dev, "ACPI slave is not supported yet\n");
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- }
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- return false;
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-}
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-EXPORT_SYMBOL_GPL(i2c_detect_slave_mode);
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-
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-#endif
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-
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MODULE_AUTHOR("Simon G. Vogl <simon@tk.uni-linz.ac.at>");
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MODULE_DESCRIPTION("I2C-Bus main module");
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MODULE_LICENSE("GPL");
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