Commit a5acafb2 authored by Zakharov Vlad's avatar Zakharov Vlad Committed by Tom Rini

timer: Support clocks via phandle

Earlier timer driver needed a clock-frequency property in compatible
device-tree nodes. Another way is to reference a clock via a phandle.

So now timer_pre_probe tries to get clock by reference through device
tree. In case it is impossible to get clock device through the
reference, clock-frequency property of the timer node is read to provide
backward compatibility.
Signed-off-by: default avatarVlad Zakharov <>
Reviewed-by: default avatarSimon Glass <>
parent bd2e9714
......@@ -8,6 +8,7 @@
#include <dm.h>
#include <dm/lists.h>
#include <dm/device-internal.h>
#include <clk.h>
#include <errno.h>
#include <timer.h>
......@@ -42,9 +43,19 @@ unsigned long notrace timer_get_rate(struct udevice *dev)
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);
struct clk timer_clk;
int err;
ulong ret;
err = clk_get_by_index(dev, 0, &timer_clk);
if (!err) {
ret = clk_get_rate(&timer_clk);
if (IS_ERR_VALUE(ret))
return ret;
uc_priv->clock_rate = ret;
} else
uc_priv->clock_rate = fdtdec_get_int(gd->fdt_blob,
dev->of_offset, "clock-frequency", 0);
return 0;
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