arm: socfpga: Fix delay in clock manager
This code claims it needs to wait 7us, yet it uses get_timer() function
which operates with millisecond granularity. Use timer_get_us() instead,
which operates with microsecond granularity.
Signed-off-by: Marek Vasut <marex@denx.de>
diff --git a/arch/arm/mach-socfpga/clock_manager.c b/arch/arm/mach-socfpga/clock_manager.c
index 1341df4..aa71636 100644
--- a/arch/arm/mach-socfpga/clock_manager.c
+++ b/arch/arm/mach-socfpga/clock_manager.c
@@ -90,7 +90,7 @@
void cm_basic_init(const struct cm_config * const cfg)
{
- uint32_t start, timeout;
+ unsigned long end;
/* Start by being paranoid and gate all sw managed clocks */
@@ -159,12 +159,10 @@
writel(cfg->sdram_vco_base, &clock_manager_base->sdr_pll.vco);
/*
- * Time starts here
- * must wait 7 us from BGPWRDN_SET(0) to VCO_ENABLE_SET(1)
+ * Time starts here. Must wait 7 us from
+ * BGPWRDN_SET(0) to VCO_ENABLE_SET(1).
*/
- start = get_timer(0);
- /* timeout in unit of us as CONFIG_SYS_HZ = 1000*1000 */
- timeout = 7;
+ end = timer_get_us() + 7;
/* main mpu */
writel(cfg->mpuclk, &clock_manager_base->main_pll.mpuclk);
@@ -204,7 +202,7 @@
writel(cfg->s2fuser1clk, &clock_manager_base->per_pll.s2fuser1clk);
/* 7 us must have elapsed before we can enable the VCO */
- while (get_timer(start) < timeout)
+ while (timer_get_us() < end)
;
/* Enable vco */