Merge git://git.denx.de/u-boot-fsl-qoriq

[u-boot] / arch / arm / cpu / armv8 / generic_timer.c

diff --git a/arch/arm/cpu/armv8/generic_timer.c b/arch/arm/cpu/armv8/generic_timer.c
index 223b95e210edd7146c6a8549bbf7f43b362d105b..8f47a82043b00519100bb4e600edc23c47ac8d90 100644 (file)
--- a/arch/arm/cpu/armv8/generic_timer.c
+++ b/arch/arm/cpu/armv8/generic_timer.c
@@ -25,7 +25,29 @@ unsigned long get_tbclk(void)
 unsigned long timer_read_counter(void)
 {
        unsigned long cntpct;
+#ifdef CONFIG_SYS_FSL_ERRATUM_A008585
+       /* This erratum number needs to be confirmed to match ARM document */
+       unsigned long temp;
+#endif
        isb();
        asm volatile("mrs %0, cntpct_el0" : "=r" (cntpct));
+#ifdef CONFIG_SYS_FSL_ERRATUM_A008585
+       asm volatile("mrs %0, cntpct_el0" : "=r" (temp));
+       while (temp != cntpct) {
+               asm volatile("mrs %0, cntpct_el0" : "=r" (cntpct));
+               asm volatile("mrs %0, cntpct_el0" : "=r" (temp));
+       }
+#endif
        return cntpct;
 }
+
+unsigned long usec2ticks(unsigned long usec)
+{
+       ulong ticks;
+       if (usec < 1000)
+               ticks = ((usec * (get_tbclk()/1000)) + 500) / 1000;
+       else
+               ticks = ((usec / 10) * (get_tbclk() / 100000));
+
+       return ticks;
+}