omap: timer: fix the rate setting

The prescaler (PTV) setting must be taken into account even when the
timer input clock frequency has been set.

Signed-off-by: Dario Binacchi <dariobin@libero.it>

diff --git a/drivers/timer/omap-timer.c b/drivers/timer/omap-timer.c
index 7ac20d78dd8450c1557b77f27390a2ccf09a209b..721e385fd154b8558d468012e4617fe2a92754b7 100644 (file)
--- a/drivers/timer/omap-timer.c
+++ b/drivers/timer/omap-timer.c
@@ -19,8 +19,6 @@
 #define TCLR_PRE_EN                    BIT(5)  /* Pre-scaler enable */
 #define TCLR_PTV_SHIFT                 (2)     /* Pre-scaler shift value */
 
-#define TIMER_CLOCK             (V_SCLK / (2 << CONFIG_SYS_PTV))
-
 struct omap_gptimer_regs {
        unsigned int tidr;              /* offset 0x00 */
        unsigned char res1[12];
@@ -61,7 +59,9 @@ static int omap_timer_probe(struct udevice *dev)
        struct omap_timer_priv *priv = dev_get_priv(dev);
 
        if (!uc_priv->clock_rate)
-               uc_priv->clock_rate = TIMER_CLOCK;
+               uc_priv->clock_rate = V_SCLK;
+
+       uc_priv->clock_rate /= (2 << CONFIG_SYS_PTV);
 
        /* start the counter ticking up, reload value on overflow */
        writel(0, &priv->regs->tldr);