diff options
Diffstat (limited to 'arch/arm/mach-omap2/devices.c')
-rw-r--r-- | arch/arm/mach-omap2/devices.c | 64 |
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 | |||
968 | static 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 | |||
1010 | static 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 | |||
1018 | static int __init omap2_init_devices(void) | 958 | static 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(); |