[PATCH v2 13/21] arm: socfpga: Secure register access for reading PLL frequency

[chee . hong . ang]

From: Chee Hong Ang <chee.hong....@intel.com>

Allow reading external oscillator and FPGA clock's frequency from
System Manager's Boot Scratch Register 1 and Boot Scratch Register 2
in non-secure mode (EL2) on SoC 64bits platform.

Signed-off-by: Chee Hong Ang <chee.hong....@intel.com>
---
 arch/arm/mach-socfpga/wrap_pll_config_s10.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/arch/arm/mach-socfpga/wrap_pll_config_s10.c 
b/arch/arm/mach-socfpga/wrap_pll_config_s10.c
index 3da8579..7bd92d0 100644
--- a/arch/arm/mach-socfpga/wrap_pll_config_s10.c
+++ b/arch/arm/mach-socfpga/wrap_pll_config_s10.c
@@ -9,6 +9,7 @@
 #include <asm/io.h>
 #include <asm/arch/handoff_s10.h>
 #include <asm/arch/system_manager.h>
+#include <asm/arch/secure_reg_helper.h>
 
 const struct cm_config * const cm_get_default_config(void)
 {
@@ -39,8 +40,8 @@ const unsigned int cm_get_osc_clk_hz(void)
        writel(clock,
               socfpga_get_sysmgr_addr() + SYSMGR_SOC64_BOOT_SCRATCH_COLD1);
 #endif
-       return readl(socfpga_get_sysmgr_addr() +
-                    SYSMGR_SOC64_BOOT_SCRATCH_COLD1);
+       return socfpga_secure_reg_read32(socfpga_get_sysmgr_addr() +
+                                        SYSMGR_SOC64_BOOT_SCRATCH_COLD1);
 }
 
 const unsigned int cm_get_intosc_clk_hz(void)
@@ -56,6 +57,6 @@ const unsigned int cm_get_fpga_clk_hz(void)
        writel(clock,
               socfpga_get_sysmgr_addr() + SYSMGR_SOC64_BOOT_SCRATCH_COLD2);
 #endif
-       return readl(socfpga_get_sysmgr_addr() +
-                    SYSMGR_SOC64_BOOT_SCRATCH_COLD2);
+       return socfpga_secure_reg_read32(socfpga_get_sysmgr_addr() +
+                                        SYSMGR_SOC64_BOOT_SCRATCH_COLD2);
 }
-- 
2.7.4