ARC: Don't try to use value of top level clock-frequency in DT

We no longer use it and instead a real clk device such as fixed-clk
instance is fed to timers etc.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
[vgupta: broken out of a bigger patch, rewrote changelog]
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

arch/arc/kernel/setup.c

@@ -23,7 +23,6 @@
 #include <asm/page.h>
 #include <asm/irq.h>
 #include <asm/unwind.h>
-#include <asm/clk.h>
 #include <asm/mach_desc.h>
 #include <asm/smp.h>
 
@@ -219,10 +218,6 @@ static char *arc_cpu_mumbojumbo(int cpu_id, char *buf, int len)
 	if (tbl->info.id == 0)
 		n += scnprintf(buf + n, len - n, "UNKNOWN ARC Processor\n");
 
-	n += scnprintf(buf + n, len - n, "CPU speed\t: %u.%02u Mhz\n",
-		       (unsigned int)(arc_get_core_freq() / 1000000),
-		       (unsigned int)(arc_get_core_freq() / 10000) % 100);
-
 	n += scnprintf(buf + n, len - n, "Timers\t\t: %s%s%s%s\nISA Extn\t: ",
 		       IS_AVAIL1(cpu->extn.timer0, "Timer0 "),
 		       IS_AVAIL1(cpu->extn.timer1, "Timer1 "),
@@ -472,6 +467,8 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 {
 	char *str;
 	int cpu_id = ptr_to_cpu(v);
+	struct device_node *core_clk = of_find_node_by_name(NULL, "core_clk");
+	u32 freq = 0;
 
 	if (!cpu_online(cpu_id)) {
 		seq_printf(m, "processor [%d]\t: Offline\n", cpu_id);
@@ -484,6 +481,11 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 
 	seq_printf(m, arc_cpu_mumbojumbo(cpu_id, str, PAGE_SIZE));
 
+	of_property_read_u32(core_clk, "clock-frequency", &freq);
+	if (freq)
+		seq_printf(m, "CPU speed\t: %u.%02u Mhz\n",
+			   freq / 1000000, (freq / 10000) % 100);
+
 	seq_printf(m, "Bogo MIPS\t: %lu.%02lu\n",
 		   loops_per_jiffy / (500000 / HZ),
 		   (loops_per_jiffy / (5000 / HZ)) % 100);

arch/arc/plat-axs10x/axs10x.c

@@ -19,7 +19,6 @@
 #include <linux/libfdt.h>
 
 #include <asm/asm-offsets.h>
-#include <asm/clk.h>
 #include <asm/io.h>
 #include <asm/mach_desc.h>
 #include <asm/mcip.h>
@@ -448,7 +447,6 @@ static void __init axs103_early_init(void)
 
 	/* Patching .dtb in-place with new core clock value */
 	if (freq != orig ) {
-		arc_set_core_freq(freq * 1000000);
 		freq = cpu_to_be32(freq * 1000000);
 		fdt_setprop_inplace(initial_boot_params, offset,
 				    "clock-frequency", &freq, sizeof(freq));