1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (C) 2007 PA Semi, Inc
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Parts based on arch/powerpc/sysdev/fsl_soc.c:
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * 2006 (c) MontaVista Software, Inc.
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <linux/errno.h>
11*4882a593Smuzhiyun #include <linux/kernel.h>
12*4882a593Smuzhiyun #include <linux/pci.h>
13*4882a593Smuzhiyun #include <linux/of.h>
14*4882a593Smuzhiyun #include <linux/i2c.h>
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #ifdef CONFIG_I2C_BOARDINFO
17*4882a593Smuzhiyun /* The below is from fsl_soc.c. It's copied because since there are no
18*4882a593Smuzhiyun * official bus bindings at this time it doesn't make sense to share across
19*4882a593Smuzhiyun * the platforms, even though they happen to be common.
20*4882a593Smuzhiyun */
21*4882a593Smuzhiyun struct i2c_driver_device {
22*4882a593Smuzhiyun char *of_device;
23*4882a593Smuzhiyun char *i2c_type;
24*4882a593Smuzhiyun };
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun static struct i2c_driver_device i2c_devices[] __initdata = {
27*4882a593Smuzhiyun {"dallas,ds1338", "ds1338"},
28*4882a593Smuzhiyun };
29*4882a593Smuzhiyun
find_i2c_driver(struct device_node * node,struct i2c_board_info * info)30*4882a593Smuzhiyun static int __init find_i2c_driver(struct device_node *node,
31*4882a593Smuzhiyun struct i2c_board_info *info)
32*4882a593Smuzhiyun {
33*4882a593Smuzhiyun int i;
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun for (i = 0; i < ARRAY_SIZE(i2c_devices); i++) {
36*4882a593Smuzhiyun if (!of_device_is_compatible(node, i2c_devices[i].of_device))
37*4882a593Smuzhiyun continue;
38*4882a593Smuzhiyun if (strlcpy(info->type, i2c_devices[i].i2c_type,
39*4882a593Smuzhiyun I2C_NAME_SIZE) >= I2C_NAME_SIZE)
40*4882a593Smuzhiyun return -ENOMEM;
41*4882a593Smuzhiyun return 0;
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun return -ENODEV;
44*4882a593Smuzhiyun }
45*4882a593Smuzhiyun
pasemi_register_i2c_devices(void)46*4882a593Smuzhiyun static int __init pasemi_register_i2c_devices(void)
47*4882a593Smuzhiyun {
48*4882a593Smuzhiyun struct pci_dev *pdev;
49*4882a593Smuzhiyun struct device_node *adap_node;
50*4882a593Smuzhiyun struct device_node *node;
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun pdev = NULL;
53*4882a593Smuzhiyun while ((pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa003, pdev))) {
54*4882a593Smuzhiyun adap_node = pci_device_to_OF_node(pdev);
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun if (!adap_node)
57*4882a593Smuzhiyun continue;
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun for_each_child_of_node(adap_node, node) {
60*4882a593Smuzhiyun struct i2c_board_info info = {};
61*4882a593Smuzhiyun const u32 *addr;
62*4882a593Smuzhiyun int len;
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun addr = of_get_property(node, "reg", &len);
65*4882a593Smuzhiyun if (!addr || len < sizeof(int) ||
66*4882a593Smuzhiyun *addr > (1 << 10) - 1) {
67*4882a593Smuzhiyun pr_warn("pasemi_register_i2c_devices: invalid i2c device entry\n");
68*4882a593Smuzhiyun continue;
69*4882a593Smuzhiyun }
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun info.irq = irq_of_parse_and_map(node, 0);
72*4882a593Smuzhiyun if (!info.irq)
73*4882a593Smuzhiyun info.irq = -1;
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun if (find_i2c_driver(node, &info) < 0)
76*4882a593Smuzhiyun continue;
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun info.addr = *addr;
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun i2c_register_board_info(PCI_FUNC(pdev->devfn), &info,
81*4882a593Smuzhiyun 1);
82*4882a593Smuzhiyun }
83*4882a593Smuzhiyun }
84*4882a593Smuzhiyun return 0;
85*4882a593Smuzhiyun }
86*4882a593Smuzhiyun device_initcall(pasemi_register_i2c_devices);
87*4882a593Smuzhiyun #endif
88