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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
be2553ff OJ |
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. | |
be2553ff OJ |
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/i2c.h> | |
15 | ||
16 | #ifdef CONFIG_I2C_BOARDINFO | |
17 | /* The below is from fsl_soc.c. It's copied because since there are no | |
18 | * official bus bindings at this time it doesn't make sense to share across | |
19 | * the platforms, even though they happen to be common. | |
20 | */ | |
21 | struct i2c_driver_device { | |
22 | char *of_device; | |
be2553ff OJ |
23 | char *i2c_type; |
24 | }; | |
25 | ||
26 | static struct i2c_driver_device i2c_devices[] __initdata = { | |
238a871e | 27 | {"dallas,ds1338", "ds1338"}, |
be2553ff OJ |
28 | }; |
29 | ||
30 | static int __init find_i2c_driver(struct device_node *node, | |
31 | struct i2c_board_info *info) | |
32 | { | |
33 | int i; | |
34 | ||
35 | for (i = 0; i < ARRAY_SIZE(i2c_devices); i++) { | |
36 | if (!of_device_is_compatible(node, i2c_devices[i].of_device)) | |
37 | continue; | |
238a871e | 38 | if (strlcpy(info->type, i2c_devices[i].i2c_type, |
be2553ff OJ |
39 | I2C_NAME_SIZE) >= I2C_NAME_SIZE) |
40 | return -ENOMEM; | |
41 | return 0; | |
42 | } | |
43 | return -ENODEV; | |
44 | } | |
45 | ||
46 | static int __init pasemi_register_i2c_devices(void) | |
47 | { | |
48 | struct pci_dev *pdev; | |
49 | struct device_node *adap_node; | |
50 | struct device_node *node; | |
51 | ||
52 | pdev = NULL; | |
53 | while ((pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa003, pdev))) { | |
54 | adap_node = pci_device_to_OF_node(pdev); | |
55 | ||
56 | if (!adap_node) | |
57 | continue; | |
58 | ||
59 | node = NULL; | |
60 | while ((node = of_get_next_child(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) { | |
e13606d7 | 68 | pr_warn("pasemi_register_i2c_devices: invalid i2c device entry\n"); |
be2553ff OJ |
69 | continue; |
70 | } | |
71 | ||
72 | info.irq = irq_of_parse_and_map(node, 0); | |
ef24ba70 | 73 | if (!info.irq) |
be2553ff OJ |
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 |