arm: socfpga: stratix10: Add timer support for Stratix10 SoC

Add timer support for Stratix SoC

Signed-off-by: Chin Liang See <chin.liang.see@intel.com>
Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
Reviewed-by: Marek Vasut <marex@denx.de>

arch/arm/mach-socfpga/Makefile

@@ -9,7 +9,6 @@ obj-y	+= board.o
 obj-y	+= clock_manager.o
 obj-y	+= misc.o
 obj-y	+= reset_manager.o
-obj-y	+= timer.o
 
 ifdef CONFIG_TARGET_SOCFPGA_GEN5
 obj-y	+= clock_manager_gen5.o
@@ -17,6 +16,7 @@ obj-y	+= misc_gen5.o
 obj-y	+= reset_manager_gen5.o
 obj-y	+= scan_manager.o
 obj-y	+= system_manager_gen5.o
+obj-y	+= timer.o
 obj-y	+= wrap_pll_config.o
 obj-y	+= fpga_manager.o
 endif
@@ -26,6 +26,7 @@ obj-y	+= clock_manager_arria10.o
 obj-y	+= misc_arria10.o
 obj-y	+= pinmux_arria10.o
 obj-y	+= reset_manager_arria10.o
+obj-y	+= timer.o
 endif
 
 ifdef CONFIG_TARGET_SOCFPGA_STRATIX10
@@ -35,6 +36,7 @@ obj-y	+= misc_s10.o
 obj-y	+= mmu-arm64_s10.o
 obj-y	+= reset_manager_s10.o
 obj-y	+= system_manager_s10.o
+obj-y	+= timer_s10.o
 obj-y	+= wrap_pinmux_config_s10.o
 obj-y	+= wrap_pll_config_s10.o
 endif

arch/arm/mach-socfpga/timer_s10.c

@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2017-2018 Intel Corporation <www.intel.com>
+ *
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/timer.h>
+
+/*
+ * Timer initialization
+ */
+int timer_init(void)
+{
+	int enable = 0x3;	/* timer enable + output signal masked */
+	int loadval = ~0;
+
+	/* enable system counter */
+	writel(enable, SOCFPGA_GTIMER_SEC_ADDRESS);
+	/* enable processor pysical counter */
+	asm volatile("msr cntp_ctl_el0, %0" : : "r" (enable));
+	asm volatile("msr cntp_tval_el0, %0" : : "r" (loadval));
+
+	return 0;
+}