clocksource: fixup ux500 build problems

Based on a patch from Arnd Bergmann this fixes up the build
problem of assigning a non-existing global when the ux500 PRCMU
timer is not linked in by passing its base address to the init
function. We also add a missing <linux/errno.h> inclusion and
staticize the dummy function.

Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/clocksource/clksrc-dbx500-prcmu.c b/drivers/clocksource/clksrc-dbx500-prcmu.c
index 0ac5093a053a..59feefe0e3e6 100644
--- a/drivers/clocksource/clksrc-dbx500-prcmu.c
+++ b/drivers/clocksource/clksrc-dbx500-prcmu.c
@@ -31,7 +31,7 @@
 
 #define SCHED_CLOCK_MIN_WRAP 131072 /* 2^32 / 32768 */
 
-void __iomem *clksrc_dbx500_timer_base;
+static void __iomem *clksrc_dbx500_timer_base;
 
 static cycle_t clksrc_dbx500_prcmu_read(struct clocksource *cs)
 {
@@ -79,8 +79,10 @@ static void notrace clksrc_dbx500_prcmu_update_sched_clock(void)
 }
 #endif
 
-void __init clksrc_dbx500_prcmu_init(void)
+void __init clksrc_dbx500_prcmu_init(void __iomem *base)
 {
+        clksrc_dbx500_timer_base = base;
+
         /*
          * The A9 sub system expects the timer to be configured as
          * a continous looping timer.