| /* |
| * OF helpers for the I2C API |
| * |
| * Copyright (c) 2008 Jochen Friedrich <jochen@scram.de> |
| * |
| * Based on a previous patch from Jon Smirl <jonsmirl@gmail.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| */ |
| |
| #include <linux/i2c.h> |
| #include <linux/of.h> |
| #include <linux/of_i2c.h> |
| #include <linux/module.h> |
| |
| void of_register_i2c_devices(struct i2c_adapter *adap, |
| struct device_node *adap_node) |
| { |
| void *result; |
| struct device_node *node; |
| |
| for_each_child_of_node(adap_node, node) { |
| struct i2c_board_info info = {}; |
| struct dev_archdata dev_ad = {}; |
| const u32 *addr; |
| int len; |
| |
| if (of_modalias_node(node, info.type, sizeof(info.type)) < 0) |
| continue; |
| |
| addr = of_get_property(node, "reg", &len); |
| if (!addr || len < sizeof(int) || *addr > (1 << 10) - 1) { |
| printk(KERN_ERR |
| "of-i2c: invalid i2c device entry\n"); |
| continue; |
| } |
| |
| info.irq = irq_of_parse_and_map(node, 0); |
| |
| info.addr = *addr; |
| |
| dev_archdata_set_node(&dev_ad, node); |
| info.archdata = &dev_ad; |
| |
| request_module("%s", info.type); |
| |
| result = i2c_new_device(adap, &info); |
| if (result == NULL) { |
| printk(KERN_ERR |
| "of-i2c: Failed to load driver for %s\n", |
| info.type); |
| irq_dispose_mapping(info.irq); |
| continue; |
| } |
| |
| /* |
| * Get the node to not lose the dev_archdata->of_node. |
| * Currently there is no way to put it back, as well as no |
| * of_unregister_i2c_devices() call. |
| */ |
| of_node_get(node); |
| } |
| } |
| EXPORT_SYMBOL(of_register_i2c_devices); |
| |
| MODULE_LICENSE("GPL"); |