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| author | Bin Meng <bmeng.cn@gmail.com> | 2015-11-13 00:11:15 -0800 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2015-12-01 06:23:51 -0700 |
| commit | 579eb5a0cc61a529be5fb540fa32ed0404955db2 (patch) | |
| tree | d8e8256885cba466820d5681e53b795772e1d4d4 /drivers/timer | |
| parent | 435ae76edd3a90fc4dd2f582052d7362cb8bdad7 (diff) | |
| download | u-boot-579eb5a0cc61a529be5fb540fa32ed0404955db2.tar.gz u-boot-579eb5a0cc61a529be5fb540fa32ed0404955db2.tar.bz2 u-boot-579eb5a0cc61a529be5fb540fa32ed0404955db2.zip | |
dm: timer: Implement pre_probe()
Every timer device needs to have a valid clock frequency and it
can be specified in the device tree. Use pre_probe() to get this
in the timer uclass driver.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Thomas Chou <thomas@wytron.com.tw>
Acked-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers/timer')
| -rw-r--r-- | drivers/timer/timer-uclass.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/timer/timer-uclass.c b/drivers/timer/timer-uclass.c index 82c68975be..02185912d5 100644 --- a/drivers/timer/timer-uclass.c +++ b/drivers/timer/timer-uclass.c @@ -9,6 +9,8 @@ #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 @@ -35,8 +37,19 @@ 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; +} + UCLASS_DRIVER(timer) = { .id = UCLASS_TIMER, .name = "timer", + .pre_probe = timer_pre_probe, .per_device_auto_alloc_size = sizeof(struct timer_dev_priv), }; |