1 /* 2 * Copyright (C) 2007 PA Semi, Inc 3 * 4 * Parts based on arch/powerpc/sysdev/fsl_soc.c: 5 * 6 * 2006 (c) MontaVista Software, Inc. 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License as published by the 10 * Free Software Foundation; either version 2 of the License, or (at your 11 * option) any later version. 12 */ 13 14 #include <linux/errno.h> 15 #include <linux/kernel.h> 16 #include <linux/pci.h> 17 #include <linux/of.h> 18 #include <linux/i2c.h> 19 20 #ifdef CONFIG_I2C_BOARDINFO 21 /* The below is from fsl_soc.c. It's copied because since there are no 22 * official bus bindings at this time it doesn't make sense to share across 23 * the platforms, even though they happen to be common. 24 */ 25 struct i2c_driver_device { 26 char *of_device; 27 char *i2c_driver; 28 char *i2c_type; 29 }; 30 31 static struct i2c_driver_device i2c_devices[] __initdata = { 32 {"dallas,ds1338", "rtc-ds1307", "ds1338"}, 33 }; 34 35 static int __init find_i2c_driver(struct device_node *node, 36 struct i2c_board_info *info) 37 { 38 int i; 39 40 for (i = 0; i < ARRAY_SIZE(i2c_devices); i++) { 41 if (!of_device_is_compatible(node, i2c_devices[i].of_device)) 42 continue; 43 if (strlcpy(info->driver_name, i2c_devices[i].i2c_driver, 44 KOBJ_NAME_LEN) >= KOBJ_NAME_LEN || 45 strlcpy(info->type, i2c_devices[i].i2c_type, 46 I2C_NAME_SIZE) >= I2C_NAME_SIZE) 47 return -ENOMEM; 48 return 0; 49 } 50 return -ENODEV; 51 } 52 53 static int __init pasemi_register_i2c_devices(void) 54 { 55 struct pci_dev *pdev; 56 struct device_node *adap_node; 57 struct device_node *node; 58 59 pdev = NULL; 60 while ((pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa003, pdev))) { 61 adap_node = pci_device_to_OF_node(pdev); 62 63 if (!adap_node) 64 continue; 65 66 node = NULL; 67 while ((node = of_get_next_child(adap_node, node))) { 68 struct i2c_board_info info = {}; 69 const u32 *addr; 70 int len; 71 72 addr = of_get_property(node, "reg", &len); 73 if (!addr || len < sizeof(int) || 74 *addr > (1 << 10) - 1) { 75 printk(KERN_WARNING 76 "pasemi_register_i2c_devices: " 77 "invalid i2c device entry\n"); 78 continue; 79 } 80 81 info.irq = irq_of_parse_and_map(node, 0); 82 if (info.irq == NO_IRQ) 83 info.irq = -1; 84 85 if (find_i2c_driver(node, &info) < 0) 86 continue; 87 88 info.addr = *addr; 89 90 i2c_register_board_info(PCI_FUNC(pdev->devfn), &info, 91 1); 92 } 93 } 94 return 0; 95 } 96 device_initcall(pasemi_register_i2c_devices); 97 #endif 98