Merge branch 'for-next/of-i2c'
This commit is contained in:
commit
1f23a43924
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@ -545,6 +545,7 @@ static int __init i2c_fsl_probe(struct device_d *pdev)
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i2c_fsl->adapter.master_xfer = i2c_fsl_xfer;
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i2c_fsl->adapter.nr = pdev->id;
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i2c_fsl->adapter.dev.parent = pdev;
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i2c_fsl->adapter.dev.device_node = pdev->device_node;
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i2c_fsl->base = dev_request_mem_region(pdev, 0);
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i2c_fsl->dfsrr = -1;
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@ -572,8 +573,17 @@ fail:
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return ret;
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}
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static __maybe_unused struct of_device_id imx_i2c_dt_ids[] = {
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{
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.compatible = "fsl,imx21-i2c",
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}, {
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/* sentinel */
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}
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};
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static struct driver_d i2c_fsl_driver = {
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.probe = i2c_fsl_probe,
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.name = DRIVER_NAME,
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.of_compatible = DRV_OF_COMPAT(imx_i2c_dt_ids),
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};
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device_platform_driver(i2c_fsl_driver);
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@ -254,33 +254,61 @@ struct i2c_client *i2c_new_device(struct i2c_adapter *adapter,
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client->dev.platform_data = chip->platform_data;
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client->dev.id = DEVICE_ID_DYNAMIC;
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client->dev.bus = &i2c_bus;
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client->dev.device_node = chip->of_node;
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client->adapter = adapter;
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client->addr = chip->addr;
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client->dev.parent = &adapter->dev;
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status = register_device(&client->dev);
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#if 0
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/* drivers may modify this initial i/o setup */
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status = master->setup(client);
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if (status < 0) {
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printf("can't setup %s, status %d\n",
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client->dev.name, status);
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goto fail;
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if (status) {
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free(client);
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return NULL;
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}
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#endif
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return client;
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#if 0
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fail:
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free(proxy);
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return NULL;
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#endif
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}
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EXPORT_SYMBOL(i2c_new_device);
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void of_i2c_register_devices(struct i2c_adapter *adap)
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{
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struct device_node *n;
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/* Only register child devices if the adapter has a node pointer set */
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if (!IS_ENABLED(CONFIG_OFDEVICE) || !adap->dev.device_node)
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return;
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device_node_for_nach_child(adap->dev.device_node, n) {
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struct i2c_board_info info = {};
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struct i2c_client *result;
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const __be32 *addr;
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int len;
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of_modalias_node(n, info.type, I2C_NAME_SIZE);
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info.of_node = n;
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addr = of_get_property(n, "reg", &len);
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if (!addr || (len < sizeof(int))) {
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dev_err(&adap->dev, "of_i2c: invalid reg on %s\n",
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n->full_name);
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continue;
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}
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info.addr = be32_to_cpup(addr);
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if (info.addr > (1 << 10) - 1) {
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dev_err(&adap->dev, "of_i2c: invalid addr=%x on %s\n",
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info.addr, n->full_name);
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continue;
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}
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result = i2c_new_device(adap, &info);
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if (!result)
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dev_err(&adap->dev, "of_i2c: Failure registering %s\n",
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n->full_name);
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}
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}
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/**
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* i2c_new_dummy - return a new i2c device bound to a dummy driver
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* @adapter: the adapter managing the device
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@ -396,8 +424,17 @@ int i2c_add_numbered_adapter(struct i2c_adapter *adapter)
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{
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int ret;
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if (i2c_get_adapter(adapter->nr))
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return -EBUSY;
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if (adapter->nr < 0) {
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int nr;
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for (nr = 0;; nr++)
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if (!i2c_get_adapter(nr))
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break;
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adapter->nr = nr;
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} else {
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if (i2c_get_adapter(adapter->nr))
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return -EBUSY;
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}
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adapter->dev.id = adapter->nr;
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strcpy(adapter->dev.name, "i2c");
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@ -411,6 +448,8 @@ int i2c_add_numbered_adapter(struct i2c_adapter *adapter)
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/* populate children from any i2c device tables */
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scan_boardinfo(adapter);
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of_i2c_register_devices(adapter);
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return 0;
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}
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EXPORT_SYMBOL(i2c_add_numbered_adapter);
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@ -656,6 +656,33 @@ int of_property_read_string_index(struct device_node *np, const char *propname,
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}
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EXPORT_SYMBOL_GPL(of_property_read_string_index);
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/**
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* of_modalias_node - Lookup appropriate modalias for a device node
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* @node: pointer to a device tree node
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* @modalias: Pointer to buffer that modalias value will be copied into
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* @len: Length of modalias value
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*
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* Based on the value of the compatible property, this routine will attempt
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* to choose an appropriate modalias value for a particular device tree node.
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* It does this by stripping the manufacturer prefix (as delimited by a ',')
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* from the first entry in the compatible list property.
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*
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* This routine returns 0 on success, <0 on failure.
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*/
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int of_modalias_node(struct device_node *node, char *modalias, int len)
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{
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const char *compatible, *p;
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int cplen;
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compatible = of_get_property(node, "compatible", &cplen);
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if (!compatible || strlen(compatible) > cplen)
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return -ENODEV;
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p = strchr(compatible, ',');
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strlcpy(modalias, p ? p + 1 : compatible, len);
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return 0;
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}
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EXPORT_SYMBOL_GPL(of_modalias_node);
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struct device_node *of_get_root_node(void)
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{
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return root_node;
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@ -105,6 +105,7 @@ struct i2c_board_info {
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char type[I2C_NAME_SIZE]; /**< name of device */
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unsigned short addr; /**< stored in i2c_client.addr */
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void *platform_data; /**< platform data for device */
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struct device_node *of_node;
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};
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/**
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@ -72,6 +72,8 @@ struct fdt_header *fdt_get_tree(void);
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struct fdt_header *of_get_fixed_tree(struct device_node *node);
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int of_modalias_node(struct device_node *node, char *modalias, int len);
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#define device_node_for_nach_child(node, child) \
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list_for_each_entry(child, &node->children, parent_list)
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