| 1 | --- a/drivers/watchdog/bcm47xx_wdt.c |
| 2 | +++ b/drivers/watchdog/bcm47xx_wdt.c |
| 3 | @@ -31,6 +31,7 @@ |
| 4 | |
| 5 | #define WDT_DEFAULT_TIME 30 /* seconds */ |
| 6 | #define WDT_MAX_TIME 255 /* seconds */ |
| 7 | +#define WDT_SHIFT 15 /* 32.768 KHz on cores with slow WDT clock */ |
| 8 | |
| 9 | static int wdt_time = WDT_DEFAULT_TIME; |
| 10 | static int nowayout = WATCHDOG_NOWAYOUT; |
| 11 | @@ -50,11 +51,11 @@ static unsigned long bcm47xx_wdt_busy; |
| 12 | static char expect_release; |
| 13 | static struct timer_list wdt_timer; |
| 14 | static atomic_t ticks; |
| 15 | +static int needs_sw_scale; |
| 16 | |
| 17 | -static inline void bcm47xx_wdt_hw_start(void) |
| 18 | +static inline void bcm47xx_wdt_hw_start(u32 ticks) |
| 19 | { |
| 20 | - /* this is 2,5s on 100Mhz clock and 2s on 133 Mhz */ |
| 21 | - ssb_watchdog_timer_set(&ssb_bcm47xx, 0xfffffff); |
| 22 | + ssb_watchdog_timer_set(&ssb_bcm47xx, ticks); |
| 23 | } |
| 24 | |
| 25 | static inline int bcm47xx_wdt_hw_stop(void) |
| 26 | @@ -65,33 +66,34 @@ static inline int bcm47xx_wdt_hw_stop(vo |
| 27 | static void bcm47xx_timer_tick(unsigned long unused) |
| 28 | { |
| 29 | if (!atomic_dec_and_test(&ticks)) { |
| 30 | - bcm47xx_wdt_hw_start(); |
| 31 | + /* This is 2,5s on 100Mhz clock and 2s on 133 Mhz */ |
| 32 | + bcm47xx_wdt_hw_start(0xfffffff); |
| 33 | mod_timer(&wdt_timer, jiffies + HZ); |
| 34 | } else { |
| 35 | - printk(KERN_CRIT DRV_NAME "Watchdog will fire soon!!!\n"); |
| 36 | + printk(KERN_CRIT DRV_NAME ": Watchdog will fire soon!!!\n"); |
| 37 | } |
| 38 | } |
| 39 | |
| 40 | -static inline void bcm47xx_wdt_pet(void) |
| 41 | +static void bcm47xx_wdt_pet(void) |
| 42 | { |
| 43 | - atomic_set(&ticks, wdt_time); |
| 44 | + if(needs_sw_scale) |
| 45 | + atomic_set(&ticks, wdt_time); |
| 46 | + else |
| 47 | + bcm47xx_wdt_hw_start(wdt_time << WDT_SHIFT); |
| 48 | } |
| 49 | |
| 50 | static void bcm47xx_wdt_start(void) |
| 51 | { |
| 52 | bcm47xx_wdt_pet(); |
| 53 | - bcm47xx_timer_tick(0); |
| 54 | -} |
| 55 | - |
| 56 | -static void bcm47xx_wdt_pause(void) |
| 57 | -{ |
| 58 | - del_timer_sync(&wdt_timer); |
| 59 | - bcm47xx_wdt_hw_stop(); |
| 60 | + if(needs_sw_scale) |
| 61 | + bcm47xx_timer_tick(0); |
| 62 | } |
| 63 | |
| 64 | static void bcm47xx_wdt_stop(void) |
| 65 | { |
| 66 | - bcm47xx_wdt_pause(); |
| 67 | + if(needs_sw_scale) |
| 68 | + del_timer_sync(&wdt_timer); |
| 69 | + bcm47xx_wdt_hw_stop(); |
| 70 | } |
| 71 | |
| 72 | static int bcm47xx_wdt_settimeout(int new_time) |
| 73 | @@ -243,7 +245,15 @@ static int __init bcm47xx_wdt_init(void) |
| 74 | if (bcm47xx_wdt_hw_stop() < 0) |
| 75 | return -ENODEV; |
| 76 | |
| 77 | - setup_timer(&wdt_timer, bcm47xx_timer_tick, 0L); |
| 78 | + /* FIXME Other cores */ |
| 79 | + if(ssb_bcm47xx.chip_id == 0x5354) { |
| 80 | + /* Slow WDT clock, no pre-scaling */ |
| 81 | + needs_sw_scale = 0; |
| 82 | + } else { |
| 83 | + /* Fast WDT clock, needs software pre-scaling */ |
| 84 | + needs_sw_scale = 1; |
| 85 | + setup_timer(&wdt_timer, bcm47xx_timer_tick, 0L); |
| 86 | + } |
| 87 | |
| 88 | if (bcm47xx_wdt_settimeout(wdt_time)) { |
| 89 | bcm47xx_wdt_settimeout(WDT_DEFAULT_TIME); |
| 90 | |
