diff options
Diffstat (limited to 'drivers/timer/timer-uclass.c')
| -rw-r--r-- | drivers/timer/timer-uclass.c | 30 |
1 files changed, 26 insertions, 4 deletions
diff --git a/drivers/timer/timer-uclass.c b/drivers/timer/timer-uclass.c index 12aee5ba4e..aca421bdea 100644 --- a/drivers/timer/timer-uclass.c +++ b/drivers/timer/timer-uclass.c @@ -9,16 +9,18 @@ #include <errno.h> #include <timer.h> +DECLARE_GLOBAL_DATA_PTR; + /* - * Implement a Timer uclass to work with lib/time.c. The timer is usually - * a 32 bits free-running up counter. The get_rate() method is used to get + * Implement a timer uclass to work with lib/time.c. The timer is usually + * a 32/64 bits free-running up counter. The get_rate() method is used to get * the input clock frequency of the timer. The get_count() method is used - * get the current 32 bits count value. If the hardware is counting down, + * to get the current 64 bits count value. If the hardware is counting down, * the value should be inversed inside the method. There may be no real * tick, and no timer interrupt. */ -int timer_get_count(struct udevice *dev, unsigned long *count) +int timer_get_count(struct udevice *dev, u64 *count) { const struct timer_ops *ops = device_get_ops(dev); @@ -35,8 +37,28 @@ unsigned long timer_get_rate(struct udevice *dev) return uc_priv->clock_rate; } +static int timer_pre_probe(struct udevice *dev) +{ + struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev); + + uc_priv->clock_rate = fdtdec_get_int(gd->fdt_blob, dev->of_offset, + "clock-frequency", 0); + + return 0; +} + +u64 timer_conv_64(u32 count) +{ + /* increment tbh if tbl has rolled over */ + if (count < gd->timebase_l) + gd->timebase_h++; + gd->timebase_l = count; + return ((u64)gd->timebase_h << 32) | gd->timebase_l; +} + UCLASS_DRIVER(timer) = { .id = UCLASS_TIMER, .name = "timer", + .pre_probe = timer_pre_probe, .per_device_auto_alloc_size = sizeof(struct timer_dev_priv), }; |