1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * NEC VR4100 series RTC platform device.
4 *
5 * Copyright (C) 2007 Yoichi Yuasa <yuasa@linux-mips.org>
6 */
7 #include <linux/errno.h>
8 #include <linux/init.h>
9 #include <linux/smp.h>
10 #include <linux/ioport.h>
11 #include <linux/platform_device.h>
12
13 #include <asm/cpu.h>
14 #include <asm/vr41xx/irq.h>
15
16 static struct resource rtc_type1_resource[] __initdata = {
17 {
18 .start = 0x0b0000c0,
19 .end = 0x0b0000df,
20 .flags = IORESOURCE_MEM,
21 },
22 {
23 .start = 0x0b0001c0,
24 .end = 0x0b0001df,
25 .flags = IORESOURCE_MEM,
26 },
27 {
28 .start = ELAPSEDTIME_IRQ,
29 .end = ELAPSEDTIME_IRQ,
30 .flags = IORESOURCE_IRQ,
31 },
32 {
33 .start = RTCLONG1_IRQ,
34 .end = RTCLONG1_IRQ,
35 .flags = IORESOURCE_IRQ,
36 },
37 };
38
39 static struct resource rtc_type2_resource[] __initdata = {
40 {
41 .start = 0x0f000100,
42 .end = 0x0f00011f,
43 .flags = IORESOURCE_MEM,
44 },
45 {
46 .start = 0x0f000120,
47 .end = 0x0f00013f,
48 .flags = IORESOURCE_MEM,
49 },
50 {
51 .start = ELAPSEDTIME_IRQ,
52 .end = ELAPSEDTIME_IRQ,
53 .flags = IORESOURCE_IRQ,
54 },
55 {
56 .start = RTCLONG1_IRQ,
57 .end = RTCLONG1_IRQ,
58 .flags = IORESOURCE_IRQ,
59 },
60 };
61
vr41xx_rtc_add(void)62 static int __init vr41xx_rtc_add(void)
63 {
64 struct platform_device *pdev;
65 struct resource *res;
66 unsigned int num;
67 int retval;
68
69 pdev = platform_device_alloc("RTC", -1);
70 if (!pdev)
71 return -ENOMEM;
72
73 switch (current_cpu_type()) {
74 case CPU_VR4111:
75 case CPU_VR4121:
76 res = rtc_type1_resource;
77 num = ARRAY_SIZE(rtc_type1_resource);
78 break;
79 case CPU_VR4122:
80 case CPU_VR4131:
81 case CPU_VR4133:
82 res = rtc_type2_resource;
83 num = ARRAY_SIZE(rtc_type2_resource);
84 break;
85 default:
86 retval = -ENODEV;
87 goto err_free_device;
88 }
89
90 retval = platform_device_add_resources(pdev, res, num);
91 if (retval)
92 goto err_free_device;
93
94 retval = platform_device_add(pdev);
95 if (retval)
96 goto err_free_device;
97
98 return 0;
99
100 err_free_device:
101 platform_device_put(pdev);
102
103 return retval;
104 }
105 device_initcall(vr41xx_rtc_add);
106