1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 2007 PA Semi, Inc 4 * 5 * Parts based on arch/powerpc/sysdev/fsl_soc.c: 6 * 7 * 2006 (c) MontaVista Software, Inc. 8 */ 9 10 #include <linux/errno.h> 11 #include <linux/kernel.h> 12 #include <linux/pci.h> 13 #include <linux/of.h> 14 #include <linux/of_irq.h> 15 #include <linux/i2c.h> 16 17 #ifdef CONFIG_I2C_BOARDINFO 18 /* The below is from fsl_soc.c. It's copied because since there are no 19 * official bus bindings at this time it doesn't make sense to share across 20 * the platforms, even though they happen to be common. 21 */ 22 struct i2c_driver_device { 23 char *of_device; 24 char *i2c_type; 25 }; 26 27 static struct i2c_driver_device i2c_devices[] __initdata = { 28 {"dallas,ds1338", "ds1338"}, 29 }; 30 31 static int __init find_i2c_driver(struct device_node *node, 32 struct i2c_board_info *info) 33 { 34 int i; 35 36 for (i = 0; i < ARRAY_SIZE(i2c_devices); i++) { 37 if (!of_device_is_compatible(node, i2c_devices[i].of_device)) 38 continue; 39 if (strlcpy(info->type, i2c_devices[i].i2c_type, 40 I2C_NAME_SIZE) >= I2C_NAME_SIZE) 41 return -ENOMEM; 42 return 0; 43 } 44 return -ENODEV; 45 } 46 47 static int __init pasemi_register_i2c_devices(void) 48 { 49 struct pci_dev *pdev; 50 struct device_node *adap_node; 51 struct device_node *node; 52 53 pdev = NULL; 54 while ((pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa003, pdev))) { 55 adap_node = pci_device_to_OF_node(pdev); 56 57 if (!adap_node) 58 continue; 59 60 for_each_child_of_node(adap_node, node) { 61 struct i2c_board_info info = {}; 62 const u32 *addr; 63 int len; 64 65 addr = of_get_property(node, "reg", &len); 66 if (!addr || len < sizeof(int) || 67 *addr > (1 << 10) - 1) { 68 pr_warn("pasemi_register_i2c_devices: invalid i2c device entry\n"); 69 continue; 70 } 71 72 info.irq = irq_of_parse_and_map(node, 0); 73 if (!info.irq) 74 info.irq = -1; 75 76 if (find_i2c_driver(node, &info) < 0) 77 continue; 78 79 info.addr = *addr; 80 81 i2c_register_board_info(PCI_FUNC(pdev->devfn), &info, 82 1); 83 } 84 } 85 return 0; 86 } 87 device_initcall(pasemi_register_i2c_devices); 88 #endif 89