ARM64: zynqmp: Use the same U-Boot version with/without ATF

Remove SECURE_IOU option which is not needed. U-Boot itself can detect
which EL level it is on and based on that use do platform setup.
It also simplify usage because one Kconfig entry is gone.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/arm/cpu/armv8/zynqmp/Kconfig

@@ -20,10 +20,6 @@ config SYS_SOC
 config SYS_CONFIG_NAME
 	default "xilinx_zynqmp_ep" if TARGET_ZYNQMP_EP
 
-config SECURE_IOU
-	bool "Configure ZynqMP secure IOU"
-	default n
-
 config ZYNQMP_USB
 	bool "Configure ZynqMP USB"
 

arch/arm/cpu/armv8/zynqmp/clk.c

@@ -26,6 +26,22 @@ unsigned long get_uart_clk(int dev_id)
 	return 133000000;
 }
 
+unsigned long zynqmp_get_system_timer_freq(void)
+{
+	u32 ver = zynqmp_get_silicon_version();
+
+	switch (ver) {
+	case ZYNQMP_CSU_VERSION_VELOCE:
+		return 10000;
+	case ZYNQMP_CSU_VERSION_EP108:
+		return 4000000;
+	case ZYNQMP_CSU_VERSION_QEMU:
+		return 50000000;
+	}
+
+	return 100000000;
+}
+
 #ifdef CONFIG_CLOCKS
 /**
  * set_cpu_clk_info() - Initialize clock framework

arch/arm/cpu/armv8/zynqmp/cpu.c

@@ -15,8 +15,22 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+static unsigned int zynqmp_get_silicon_version_secure(void)
+{
+	u32 ver;
+
+	ver = readl(&csu_base->version);
+	ver &= ZYNQMP_SILICON_VER_MASK;
+	ver >>= ZYNQMP_SILICON_VER_SHIFT;
+
+	return ver;
+}
+
 unsigned int zynqmp_get_silicon_version(void)
 {
+	if (current_el() == 3)
+		return zynqmp_get_silicon_version_secure();
+
 	gd->cpu_clk = get_tbclk();
 
 	switch (gd->cpu_clk) {