clocksource/drivers/sp804: Cleanup clk_get_sys()

Move the clk_get_sys() part into sp804_get_clock_rate(), cleanup the same
code.
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20200918132237.3552-2-thunder.leizhen@huawei.com

drivers/clocksource/timer-sp804.c

@@ -22,11 +22,18 @@
 
 #include "timer-sp.h"
 
-static long __init sp804_get_clock_rate(struct clk *clk)
+static long __init sp804_get_clock_rate(struct clk *clk, const char *name)
 {
 	long rate;
 	int err;
 
+	if (!clk)
+		clk = clk_get_sys("sp804", name);
+	if (IS_ERR(clk)) {
+		pr_err("sp804: %s clock not found: %ld\n", name, PTR_ERR(clk));
+		return PTR_ERR(clk);
+	}
+
 	err = clk_prepare(clk);
 	if (err) {
 		pr_err("sp804: clock failed to prepare: %d\n", err);
@@ -72,16 +79,7 @@ int  __init __sp804_clocksource_and_sched_clock_init(void __iomem *base,
 {
 	long rate;
 
-	if (!clk) {
-		clk = clk_get_sys("sp804", name);
-		if (IS_ERR(clk)) {
-			pr_err("sp804: clock not found: %d\n",
-			       (int)PTR_ERR(clk));
-			return PTR_ERR(clk);
-		}
-	}
-
-	rate = sp804_get_clock_rate(clk);
+	rate = sp804_get_clock_rate(clk, name);
 	if (rate < 0)
 		return -EINVAL;
 
@@ -173,15 +171,7 @@ int __init __sp804_clockevents_init(void __iomem *base, unsigned int irq, struct
 	struct clock_event_device *evt = &sp804_clockevent;
 	long rate;
 
-	if (!clk)
-		clk = clk_get_sys("sp804", name);
-	if (IS_ERR(clk)) {
-		pr_err("sp804: %s clock not found: %d\n", name,
-			(int)PTR_ERR(clk));
-		return PTR_ERR(clk);
-	}
-
-	rate = sp804_get_clock_rate(clk);
+	rate = sp804_get_clock_rate(clk, name);
 	if (rate < 0)
 		return -EINVAL;