Add the rt linux 4.1.3-rt3 as base
[kvmfornfv.git] / kernel / arch / mips / ath79 / dev-common.c
1 /*
2  *  Atheros AR71XX/AR724X/AR913X common devices
3  *
4  *  Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
5  *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
6  *
7  *  Parts of this file are based on Atheros' 2.6.15 BSP
8  *
9  *  This program is free software; you can redistribute it and/or modify it
10  *  under the terms of the GNU General Public License version 2 as published
11  *  by the Free Software Foundation.
12  */
13
14 #include <linux/kernel.h>
15 #include <linux/init.h>
16 #include <linux/platform_device.h>
17 #include <linux/serial_8250.h>
18 #include <linux/clk.h>
19 #include <linux/err.h>
20
21 #include <asm/mach-ath79/ath79.h>
22 #include <asm/mach-ath79/ar71xx_regs.h>
23 #include "common.h"
24 #include "dev-common.h"
25
26 static struct resource ath79_uart_resources[] = {
27         {
28                 .start  = AR71XX_UART_BASE,
29                 .end    = AR71XX_UART_BASE + AR71XX_UART_SIZE - 1,
30                 .flags  = IORESOURCE_MEM,
31         },
32 };
33
34 #define AR71XX_UART_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP)
35 static struct plat_serial8250_port ath79_uart_data[] = {
36         {
37                 .mapbase        = AR71XX_UART_BASE,
38                 .irq            = ATH79_MISC_IRQ(3),
39                 .flags          = AR71XX_UART_FLAGS,
40                 .iotype         = UPIO_MEM32,
41                 .regshift       = 2,
42         }, {
43                 /* terminating entry */
44         }
45 };
46
47 static struct platform_device ath79_uart_device = {
48         .name           = "serial8250",
49         .id             = PLAT8250_DEV_PLATFORM,
50         .resource       = ath79_uart_resources,
51         .num_resources  = ARRAY_SIZE(ath79_uart_resources),
52         .dev = {
53                 .platform_data  = ath79_uart_data
54         },
55 };
56
57 static struct resource ar933x_uart_resources[] = {
58         {
59                 .start  = AR933X_UART_BASE,
60                 .end    = AR933X_UART_BASE + AR71XX_UART_SIZE - 1,
61                 .flags  = IORESOURCE_MEM,
62         },
63         {
64                 .start  = ATH79_MISC_IRQ(3),
65                 .end    = ATH79_MISC_IRQ(3),
66                 .flags  = IORESOURCE_IRQ,
67         },
68 };
69
70 static struct platform_device ar933x_uart_device = {
71         .name           = "ar933x-uart",
72         .id             = -1,
73         .resource       = ar933x_uart_resources,
74         .num_resources  = ARRAY_SIZE(ar933x_uart_resources),
75 };
76
77 void __init ath79_register_uart(void)
78 {
79         unsigned long uart_clk_rate;
80
81         uart_clk_rate = ath79_get_sys_clk_rate("uart");
82
83         if (soc_is_ar71xx() ||
84             soc_is_ar724x() ||
85             soc_is_ar913x() ||
86             soc_is_ar934x() ||
87             soc_is_qca955x()) {
88                 ath79_uart_data[0].uartclk = uart_clk_rate;
89                 platform_device_register(&ath79_uart_device);
90         } else if (soc_is_ar933x()) {
91                 platform_device_register(&ar933x_uart_device);
92         } else {
93                 BUG();
94         }
95 }
96
97 void __init ath79_register_wdt(void)
98 {
99         struct resource res;
100
101         memset(&res, 0, sizeof(res));
102
103         res.flags = IORESOURCE_MEM;
104         res.start = AR71XX_RESET_BASE + AR71XX_RESET_REG_WDOG_CTRL;
105         res.end = res.start + 0x8 - 1;
106
107         platform_device_register_simple("ath79-wdt", -1, &res, 1);
108 }