timer: sti: use clk API to get timer clock rate
Retrieve clock rate through device tree. This mimics the behavior of
arm_global_timer in Linux.
Signed-off-by: Nicolas Heemeryck <nicolas.heemeryck@gmail.com>
Cc: Patrice Chotard <patrice.chotard@st.com>
Acked-by: Patrice Chotard <patrice.chotard@st.com>
diff --git a/drivers/timer/sti-timer.c b/drivers/timer/sti-timer.c
index eac22ae..ff42056 100644
--- a/drivers/timer/sti-timer.c
+++ b/drivers/timer/sti-timer.c
@@ -6,7 +6,9 @@
#include <common.h>
#include <dm.h>
+#include <clk.h>
#include <timer.h>
+#include <linux/err.h>
#include <asm/io.h>
#include <asm/arch-armv7/globaltimer.h>
@@ -41,14 +43,25 @@
{
struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);
struct sti_timer_priv *priv = dev_get_priv(dev);
-
- uc_priv->clock_rate = CONFIG_SYS_HZ_CLOCK;
+ struct clk clk;
+ int err;
+ ulong ret;
/* get arm global timer base address */
priv->global_timer = (struct globaltimer *)dev_read_addr_ptr(dev);
if (!priv->global_timer)
return -ENOENT;
+ err = clk_get_by_index(dev, 0, &clk);
+ if (!err) {
+ ret = clk_get_rate(&clk);
+ if (IS_ERR_VALUE(ret))
+ return ret;
+ uc_priv->clock_rate = ret;
+ } else {
+ uc_priv->clock_rate = CONFIG_SYS_HZ_CLOCK;
+ }
+
/* init timer */
writel(0x01, &priv->global_timer->ctl);