ARM: OMAP2+: PRM: initialize en_uart4_mask and grpsel_uart4_mask

In the case where has_uart4 is false, en_uart4_mask and grpsel_uart4_mask
are not initialized and so any garbage value is being logically or'd into
the write of PM_WKEN and OMAP3430_PM_MPUGRPSEL.  Fix this by initializing
these masks to zero.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/prm3xxx.c b/arch/arm/mach-omap2/prm3xxx.c
index 62680aad2126..718981bb80cd 100644
--- a/arch/arm/mach-omap2/prm3xxx.c
+++ b/arch/arm/mach-omap2/prm3xxx.c
@@ -319,6 +319,9 @@ void __init omap3_prm_init_pm(bool has_uart4, bool has_iva)
         if (has_uart4) {
                 en_uart4_mask = OMAP3630_EN_UART4_MASK;
                 grpsel_uart4_mask = OMAP3630_GRPSEL_UART4_MASK;
+        } else {
+                en_uart4_mask = 0;
+                grpsel_uart4_mask = 0;
         }
 
         /* Enable wakeups in PER */