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-rw-r--r--arch/arm/mach-omap2/devices.c64
1 files changed, 2 insertions, 62 deletions
diff --git a/arch/arm/mach-omap2/devices.c b/arch/arm/mach-omap2/devices.c
index 1bca147ac91d..381f4eb92352 100644
--- a/arch/arm/mach-omap2/devices.c
+++ b/arch/arm/mach-omap2/devices.c
@@ -955,72 +955,12 @@ static inline void omap_init_vout(void) {}
955 955
956/*-------------------------------------------------------------------------*/ 956/*-------------------------------------------------------------------------*/
957 957
958/*
959 * Inorder to avoid any assumptions from bootloader regarding WDT
960 * settings, WDT module is reset during init. This enables the watchdog
961 * timer. Hence it is required to disable the watchdog after the WDT reset
962 * during init. Otherwise the system would reboot as per the default
963 * watchdog timer registers settings.
964 */
965#define OMAP_WDT_WPS (0x34)
966#define OMAP_WDT_SPR (0x48)
967
968static int omap2_disable_wdt(struct omap_hwmod *oh, void *unused)
969{
970 void __iomem *base;
971 int ret;
972
973 if (!oh) {
974 pr_err("%s: Could not look up wdtimer_hwmod\n", __func__);
975 return -EINVAL;
976 }
977
978 base = omap_hwmod_get_mpu_rt_va(oh);
979 if (!base) {
980 pr_err("%s: Could not get the base address for %s\n",
981 oh->name, __func__);
982 return -EINVAL;
983 }
984
985 /* Enable the clocks before accessing the WDT registers */
986 ret = omap_hwmod_enable(oh);
987 if (ret) {
988 pr_err("%s: Could not enable clocks for %s\n",
989 oh->name, __func__);
990 return ret;
991 }
992
993 /* sequence required to disable watchdog */
994 __raw_writel(0xAAAA, base + OMAP_WDT_SPR);
995 while (__raw_readl(base + OMAP_WDT_WPS) & 0x10)
996 cpu_relax();
997
998 __raw_writel(0x5555, base + OMAP_WDT_SPR);
999 while (__raw_readl(base + OMAP_WDT_WPS) & 0x10)
1000 cpu_relax();
1001
1002 ret = omap_hwmod_idle(oh);
1003 if (ret)
1004 pr_err("%s: Could not disable clocks for %s\n",
1005 oh->name, __func__);
1006
1007 return ret;
1008}
1009
1010static void __init omap_disable_wdt(void)
1011{
1012 if (cpu_class_is_omap2())
1013 omap_hwmod_for_each_by_class("wd_timer",
1014 omap2_disable_wdt, NULL);
1015 return;
1016}
1017
1018static int __init omap2_init_devices(void) 958static int __init omap2_init_devices(void)
1019{ 959{
1020 /* please keep these calls, and their implementations above, 960 /*
961 * please keep these calls, and their implementations above,
1021 * in alphabetical order so they're easier to sort through. 962 * in alphabetical order so they're easier to sort through.
1022 */ 963 */
1023 omap_disable_wdt();
1024 omap_hsmmc_reset(); 964 omap_hsmmc_reset();
1025 omap_init_audio(); 965 omap_init_audio();
1026 omap_init_camera(); 966 omap_init_camera();