[PATCHv6 22/34] ARM: OMAP2+: id: cache omap_type value

[Tero Kristo]

There is no need to read the register with every invocation of the function,
as the value is constant. Thus, cache the value in a static variable.

Signed-off-by: Tero Kristo <t-kristo at ti.com>
---
 arch/arm/mach-omap2/id.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c
index 2a2f4d5..f8121db 100644
--- a/arch/arm/mach-omap2/id.c
+++ b/arch/arm/mach-omap2/id.c
@@ -52,7 +52,10 @@ EXPORT_SYMBOL(omap_rev);
 
 int omap_type(void)
 {
-	u32 val = 0;
+	static u32 val = OMAP2_DEVICETYPE_MASK;
+
+	if (val < OMAP2_DEVICETYPE_MASK)
+		return val;
 
 	if (cpu_is_omap24xx()) {
 		val = omap_ctrl_readl(OMAP24XX_CONTROL_STATUS);
-- 
1.7.9.5