Merge git://www.linux-watchdog.org/linux-watchdog
[~shefty/rdma-dev.git] / 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 <asm/mach-ath79/ar933x_uart_platform.h>
24 #include "common.h"
25 #include "dev-common.h"
26
27 static struct resource ath79_uart_resources[] = {
28         {
29                 .start  = AR71XX_UART_BASE,
30                 .end    = AR71XX_UART_BASE + AR71XX_UART_SIZE - 1,
31                 .flags  = IORESOURCE_MEM,
32         },
33 };
34
35 #define AR71XX_UART_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP)
36 static struct plat_serial8250_port ath79_uart_data[] = {
37         {
38                 .mapbase        = AR71XX_UART_BASE,
39                 .irq            = ATH79_MISC_IRQ(3),
40                 .flags          = AR71XX_UART_FLAGS,
41                 .iotype         = UPIO_MEM32,
42                 .regshift       = 2,
43         }, {
44                 /* terminating entry */
45         }
46 };
47
48 static struct platform_device ath79_uart_device = {
49         .name           = "serial8250",
50         .id             = PLAT8250_DEV_PLATFORM,
51         .resource       = ath79_uart_resources,
52         .num_resources  = ARRAY_SIZE(ath79_uart_resources),
53         .dev = {
54                 .platform_data  = ath79_uart_data
55         },
56 };
57
58 static struct resource ar933x_uart_resources[] = {
59         {
60                 .start  = AR933X_UART_BASE,
61                 .end    = AR933X_UART_BASE + AR71XX_UART_SIZE - 1,
62                 .flags  = IORESOURCE_MEM,
63         },
64         {
65                 .start  = ATH79_MISC_IRQ(3),
66                 .end    = ATH79_MISC_IRQ(3),
67                 .flags  = IORESOURCE_IRQ,
68         },
69 };
70
71 static struct ar933x_uart_platform_data ar933x_uart_data;
72 static struct platform_device ar933x_uart_device = {
73         .name           = "ar933x-uart",
74         .id             = -1,
75         .resource       = ar933x_uart_resources,
76         .num_resources  = ARRAY_SIZE(ar933x_uart_resources),
77         .dev = {
78                 .platform_data  = &ar933x_uart_data,
79         },
80 };
81
82 void __init ath79_register_uart(void)
83 {
84         struct clk *clk;
85
86         clk = clk_get(NULL, "uart");
87         if (IS_ERR(clk))
88                 panic("unable to get UART clock, err=%ld", PTR_ERR(clk));
89
90         if (soc_is_ar71xx() ||
91             soc_is_ar724x() ||
92             soc_is_ar913x() ||
93             soc_is_ar934x() ||
94             soc_is_qca955x()) {
95                 ath79_uart_data[0].uartclk = clk_get_rate(clk);
96                 platform_device_register(&ath79_uart_device);
97         } else if (soc_is_ar933x()) {
98                 ar933x_uart_data.uartclk = clk_get_rate(clk);
99                 platform_device_register(&ar933x_uart_device);
100         } else {
101                 BUG();
102         }
103 }
104
105 void __init ath79_register_wdt(void)
106 {
107         struct resource res;
108
109         memset(&res, 0, sizeof(res));
110
111         res.flags = IORESOURCE_MEM;
112         res.start = AR71XX_RESET_BASE + AR71XX_RESET_REG_WDOG_CTRL;
113         res.end = res.start + 0x8 - 1;
114
115         platform_device_register_simple("ath79-wdt", -1, &res, 1);
116 }