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timer: sti: use clk API to get timer clock rate

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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>
This commit is contained in:
Nicolas Heemeryck 2020-03-13 23:42:44 +01:00 committed by Patrick Delaunay
parent 123123d695
commit 5b5699cdc9
1 changed files with 15 additions and 2 deletions
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17
drivers/timer/sti-timer.c
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@ -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 @@ static int sti_timer_probe(struct udevice *dev)
{
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);