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Diffstat (limited to 'arch/arm/mach-omap2/wd_timer.c')
-rw-r--r--arch/arm/mach-omap2/wd_timer.c40
1 files changed, 36 insertions, 4 deletions
diff --git a/arch/arm/mach-omap2/wd_timer.c b/arch/arm/mach-omap2/wd_timer.c
index f6b6c37ac3f4..7c2b4ed38f02 100644
--- a/arch/arm/mach-omap2/wd_timer.c
+++ b/arch/arm/mach-omap2/wd_timer.c
@@ -1,6 +1,8 @@
1/* 1/*
2 * OMAP2+ MPU WD_TIMER-specific code 2 * OMAP2+ MPU WD_TIMER-specific code
3 * 3 *
4 * Copyright (C) 2012 Texas Instruments, Inc.
5 *
4 * This program is free software; you can redistribute it and/or modify 6 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by 7 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or 8 * the Free Software Foundation; either version 2 of the License, or
@@ -11,10 +13,14 @@
11#include <linux/io.h> 13#include <linux/io.h>
12#include <linux/err.h> 14#include <linux/err.h>
13 15
14#include "omap_hwmod.h" 16#include <linux/platform_data/omap-wd-timer.h>
15 17
18#include "omap_hwmod.h"
19#include "omap_device.h"
16#include "wd_timer.h" 20#include "wd_timer.h"
17#include "common.h" 21#include "common.h"
22#include "prm.h"
23#include "soc.h"
18 24
19/* 25/*
20 * In order to avoid any assumptions from bootloader regarding WDT 26 * In order to avoid any assumptions from bootloader regarding WDT
@@ -26,9 +32,6 @@
26#define OMAP_WDT_WPS 0x34 32#define OMAP_WDT_WPS 0x34
27#define OMAP_WDT_SPR 0x48 33#define OMAP_WDT_SPR 0x48
28 34
29/* Maximum microseconds to wait for OMAP module to softreset */
30#define MAX_MODULE_SOFTRESET_WAIT 10000
31
32int omap2_wd_timer_disable(struct omap_hwmod *oh) 35int omap2_wd_timer_disable(struct omap_hwmod *oh)
33{ 36{
34 void __iomem *base; 37 void __iomem *base;
@@ -99,3 +102,32 @@ int omap2_wd_timer_reset(struct omap_hwmod *oh)
99 return (c == MAX_MODULE_SOFTRESET_WAIT) ? -ETIMEDOUT : 102 return (c == MAX_MODULE_SOFTRESET_WAIT) ? -ETIMEDOUT :
100 omap2_wd_timer_disable(oh); 103 omap2_wd_timer_disable(oh);
101} 104}
105
106static int __init omap_init_wdt(void)
107{
108 int id = -1;
109 struct platform_device *pdev;
110 struct omap_hwmod *oh;
111 char *oh_name = "wd_timer2";
112 char *dev_name = "omap_wdt";
113 struct omap_wd_timer_platform_data pdata;
114
115 if (!cpu_class_is_omap2() || of_have_populated_dt())
116 return 0;
117
118 oh = omap_hwmod_lookup(oh_name);
119 if (!oh) {
120 pr_err("Could not look up wd_timer%d hwmod\n", id);
121 return -EINVAL;
122 }
123
124 pdata.read_reset_sources = prm_read_reset_sources;
125
126 pdev = omap_device_build(dev_name, id, oh, &pdata,
127 sizeof(struct omap_wd_timer_platform_data),
128 NULL, 0, 0);
129 WARN(IS_ERR(pdev), "Can't build omap_device for %s:%s.\n",
130 dev_name, oh->name);
131 return 0;
132}
133subsys_initcall(omap_init_wdt);