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_type; 28 }; 29 30 static struct i2c_driver_device i2c_devices[] __initdata = { 31 {"dallas,ds1338", "ds1338"}, 32 }; 33 34 static int __init find_i2c_driver(struct device_node *node, 35 struct i2c_board_info *info) 36 { 37 int i; 38 39 for (i = 0; i < ARRAY_SIZE(i2c_devices); i++) { 40 if (!of_device_is_compatible(node, i2c_devices[i].of_device)) 41 continue; 42 if (strlcpy(info->type, i2c_devices[i].i2c_type, 43 I2C_NAME_SIZE) >= I2C_NAME_SIZE) 44 return -ENOMEM; 45 return 0; 46 } 47 return -ENODEV; 48 } 49 50 static int __init pasemi_register_i2c_devices(void) 51 { 52 struct pci_dev *pdev; 53 struct device_node *adap_node; 54 struct device_node *node; 55 56 pdev = NULL; 57 while ((pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa003, pdev))) { 58 adap_node = pci_device_to_OF_node(pdev); 59 60 if (!adap_node) 61 continue; 62 63 node = NULL; 64 while ((node = of_get_next_child(adap_node, node))) { 65 struct i2c_board_info info = {}; 66 const u32 *addr; 67 int len; 68 69 addr = of_get_property(node, "reg", &len); 70 if (!addr || len < sizeof(int) || 71 *addr > (1 << 10) - 1) { 72 pr_warn("pasemi_register_i2c_devices: invalid i2c device entry\n"); 73 continue; 74 } 75 76 info.irq = irq_of_parse_and_map(node, 0); 77 if (!info.irq) 78 info.irq = -1; 79 80 if (find_i2c_driver(node, &info) < 0) 81 continue; 82 83 info.addr = *addr; 84 85 i2c_register_board_info(PCI_FUNC(pdev->devfn), &info, 86 1); 87 } 88 } 89 return 0; 90 } 91 device_initcall(pasemi_register_i2c_devices); 92 #endif 93