Add code to properly initialize system counter, so it would be posible
to get accurate time delays.
Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx>
---
arch/arm/mach-imx/imx8mq.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/arch/arm/mach-imx/imx8mq.c b/arch/arm/mach-imx/imx8mq.c
index 74fa8aca7..f3246e437 100644
--- a/arch/arm/mach-imx/imx8mq.c
+++ b/arch/arm/mach-imx/imx8mq.c
@@ -14,6 +14,8 @@
#include <init.h>
#include <common.h>
#include <io.h>
+#include <asm/syscounter.h>
+#include <asm/system.h>
#include <mach/generic.h>
#include <mach/revision.h>
#include <mach/imx8mq-regs.h>
@@ -58,6 +60,23 @@ static void imx8mq_silicon_revision(void)
imx_set_silicon_revision(cputypestr, reg);
}
+static int imx8mq_init_syscnt_frequency(void)
+{
+ void __iomem *syscnt = IOMEM(MX8MQ_SYSCNT_CTRL_BASE_ADDR);
+ /*
+ * Update with accurate clock frequency
+ */
+ set_cntfrq(syscnt_get_cntfrq(syscnt));
+ syscnt_enable(syscnt);
+
+ return 0;
+}
+/*
+ * This call needs to happen before timer driver gets probed and
+ * requests its update frequency via cntfrq_el0
+ */
+core_initcall(imx8mq_init_syscnt_frequency);
+
int imx8mq_init(void)
{
imx8mq_silicon_revision();
--
2.17.0
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