Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
27static 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)
36static 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
48static 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
58static 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
71static struct ar933x_uart_platform_data ar933x_uart_data;
72static 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
82void __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
105void __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}