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| author | Zakharov Vlad <Vladislav.Zakharov@synopsys.com> | 2016-12-09 17:18:32 +0300 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2016-12-27 11:24:10 -0500 |
| commit | a5acafb25598ef409f48a7884316a9a4e96c63a4 (patch) | |
| tree | 07dfbc12afa1c0ff70ec4731e6cb3b9e02afc995 /drivers | |
| parent | bd2e9714c851770652253fab858cb50ecd95d329 (diff) | |
| download | u-boot-a5acafb25598ef409f48a7884316a9a4e96c63a4.zip u-boot-a5acafb25598ef409f48a7884316a9a4e96c63a4.tar.gz u-boot-a5acafb25598ef409f48a7884316a9a4e96c63a4.tar.bz2 | |
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: Vlad Zakharov <vzakhar@synopsys.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/timer/timer-uclass.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/drivers/timer/timer-uclass.c b/drivers/timer/timer-uclass.c index f8ddf93..5c63e6b 100644 --- a/drivers/timer/timer-uclass.c +++ b/drivers/timer/timer-uclass.c @@ -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; } |